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SPECIFICATIONS
FASTENER SPECIFICATIONS
ACCESSORIES & EQUIPMENT
Wipers and Washers - Volt
Reusable Threaded Fastener Tightening Specifications
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NOTE: All fasteners listed in this table can be reused after removal. |
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Application |
Specification |
|
Metric (English) |
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Dash Upper Extension Panel Opening Cover Bolt |
9 N.m (80 lb in) |
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Front Suspension Strut Housing Brace Bolt |
22 N.m (16 lb ft) |
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Windshield Washer Solvent Container Nut |
9 N.m (80 lb in) |
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Windshield Wiper Arm Nut |
30 N.m (22 lb ft) |
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Windshield Wiper System Module Bolt |
9 N.m (80 lb in) |
SCHEMATIC WIRING DIAGRAMS
WIPER/WASHER WIRING SCHEMATICS
Windshield Wiper/Washer
Fig. 1: Windshield Wiper/Washer
Courtesy of GENERAL MOTORS COMPANY
DIAGNOSTIC INFORMATION AND PROCEDURES
DTC B3715: WINDSHIELD WIPER RELAY CIRCUIT
Diagnostic Instructions
Perform the
Diagnostic System Check - Vehicle
prior to using this diagnostic procedure.
Review Strategy Based Diagnosis
for an overview of the diagnostic approach.
Diagnostic Procedure Instructions
provides an overview of each diagnostic category.
DTC Descriptors
DTC B3715
Windshield Wiper Relay Circuit
For symptom byte information, refer to Symptom Byte List .
Diagnostic Fault Information
|
Circuit |
Short to Ground |
Open/High Resistance |
Short to Voltage |
Signal Performance |
|
Windshield Wiper Motor Module |
1 |
1 |
- |
- |
|
Circuit |
Short to Ground |
Open/High Resistance |
Short to Voltage |
Signal Performance |
|
B+ |
|
|
|
|
|
Windshield Wiper Motor Serial Data |
U1515 00 |
U1515 00 |
U1515 00 |
- |
|
Windshield Wiper Motor Relay Coil Supply Voltage |
- |
- |
- |
- |
|
Windshield Wiper/Washer Switch Signal Terminal 3 |
4 |
3 |
- |
- |
|
Windshield Wiper/Washer Switch Signal Terminal 1 |
4 |
2 |
- |
- |
|
Windshield Wiper Motor Module Ground |
- |
1, 2, 3 |
- |
- |
|
Windshield Wiper/Washer Switch Low Reference |
- |
1 |
1 |
- |
|
1. Windshield Wipers Inoperative 2. Windshield Wipers High Speed Inoperative 3. Windshield Wipers Intermittent or Low Speed Inoperative 4. Windshield Wipers Always ON |
||||
Circuit/System Description
The body control module (BCM) controls the windshield wiper motor based on inputs from the windshield wiper/washer switch, and when intermittent mode is selected, the rain/ambient light sensor module. The BCM monitors the windshield wiper/washer switch through two separate signal circuits and a low reference circuit. The windshield wiper/washer switch utilizes resistive multiplexing to signal a low speed and intermittent operation request to the BCM while a separate discrete signal circuit is used to indicate a high speed wiper request. When the wiper switch is placed in the low speed or intermittent position, the BCM monitors the voltage drop, which changes dependent upon switch position, over an internal pulled high resistor. The BCM will respond by commanding on the low speed or intermittent wipers. With the windshield wiper/washer switch in the high speed position, the BCM's high speed signal circuit is pulled low. The BCM will respond by commanding the windshield wiper motor to operate at high speed via serial data.
Conditions for Running the DTC
The DTC runs only when a wiper output is actively being requested by the BCM.
The system voltage is between 9 - 16 V.
Conditions for Setting the DTC
A short to ground is detected in the front wiper relay control circuit or in the high speed relay control circuit.
Action Taken When the DTC Sets
The BCM will not activate the wiper output.
Conditions for Clearing the DTC
A current DTC will clear when the condition for setting the fault is no longer present.
A history DTC will clear after 50 consecutive ignition cycles without a fault present.
Reference Information
Schematic Reference
Wiper/Washer Schematics
Connector End View Reference
COMPONENT CONNECTOR END VIEWS - INDEX
Description and Operation
Wiper/Washer System Description and Operation
Electrical Information Reference
Circuit Testing
Connector Repairs
Testing for Intermittent Conditions and Poor Connections
Wiring Repairs
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
1. Vehicle ON.
2. Verify that there are no communications DTCs set.
If any communication DTCs are set
Refer to Diagnostic Trouble Code (DTC) List - Vehicle .
If no communication DTCs are set
3. Verify that DTC B371A is not set.
If DTC B371A is set
Refer to DTC B371A.
If DTC B371A is not set
4. Verify the scan tool Windshield Wiper High Speed Switch parameter changes between Active and Inactive when activating the high speed windshield wipers.
If the parameter does not change
Refer to Circuit/System Testing - Windshield Wiper/Washer Switch Malfunction.
If the parameter changes
5. Verify the scan tool Windshield Wiper Switch parameter changes between Off and Low when activating the low speed windshield wipers.
If the parameter does not change
Refer to Circuit/System Testing - Windshield Wiper/Washer Switch Malfunction.
If the parameter changes
6. Verify the scan tool Windshield Wiper Switch parameter changes between Delay 1 and Delay 5 when cycling the intermittent speed windshield wipers.
If the parameter does not change
Test or replace the S82 Windsheild Wiper/Washer Switch.
If the parameter changes
7. Verify the M75 Windshield Wiper Motor changes between Off, Low, and High when cycling the S82 Windshield Wiper/Washer Switch between Off, Low, and High.
If the M75 Windshield Wiper Motor does not cycle between Off, Low, and High
Refer to Circuit/System Testing - Windshield Wiper Motor Malfunction
If the M75 Windshield Wiper Motor cycles between Off, Low, and High
8. All OK.
Circuit/System Testing
Windshield Wiper/Washer Switch Malfunction
1. Vehicle OFF and all vehicle systems OFF, disconnect the harness connector at the S82 Windshield Wiper/Washer Switch. It may take up to 11 min for all vehicle systems to power down.
2. Test for less than 10 Ω between the low reference circuit terminal 1 and ground.
If 10 Ω or greater
1. Vehicle OFF, disconnect the harness connector at the K9 Body Control Module.
2. Test for less than 2 Ω in the low reference circuit end to end.
If 2 Ω or greater, repair the open/high resistance in the circuit.
If less than 2 Ω, replace the K9 Body Control Module.
If less than 10 Ω
3. Vehicle in Service Mode.
4. Verify the scan tool Windshield Wiper High Speed Switch parameter is Inactive.
If not Inactive
1. Vehicle OFF, disconnect the harness connector at the K9 Body Control Module.
2. Test for infinite resistance between the signal circuit terminal 2 and ground.
If less than infinite resistance, repair the short to ground on the circuit.
If infinite resistance, replace the K9 Body Control Module.
If Inactive
5. Install a 3 A fused jumper wire between the signal circuit terminal 2 and the low reference circuit terminal 1.
6. Verify the scan tool Windshield Wiper High Speed Switch parameter is Active.
If not Active
1. Vehicle OFF, remove the jumper wire, disconnect the harness connector at the K9 Body Control Module, vehicle in Service Mode.
2. Test for less than 1 V between the signal circuit and ground.
If 1 V or greater, repair the short to voltage on the circuit.
If less than 1 V
3. Test for less than 2 Ω in the signal circuit end to end.
If 2 Ω or greater, repair the open/high resistance in the circuit.
If less than 2 Ω, replace the K9 Body Control Module.
If Active
7. Test for greater than 8 V between the signal circuit terminal 3 and ground.
If less than 8 V
1. Vehicle OFF, disconnect the harness connector at the K9 Body Control Module.
2. Test for infinite resistance between the signal circuit and ground
If less than infinite resistance, repair the short to ground on the circuit.
If infinite resistance
3. Test for less than 2 Ω in the signal circuit end to end.
If 2 Ω or greater, repair the open/high resistance in the circuit.
If less than 2 Ω, replace the K9 Body Control Module.
If 8 V or greater
8. Vehicle OFF, disconnect the X3 harness connector at the K9 Body Control Module, vehicle in Service Mode.
9. Test for less than 1 V between the S82 Windshield Wiper/Washer Switch signal circuit terminal 3 and ground.
If 1 V or greater
Repair the short to voltage on the circuit.
If less than 1 V
10. Test or replace the S82 Windshield Wiper/Washer Switch.
Windshield Wiper Motor Malfunction
1. Vehicle OFF and all vehicle systems OFF, disconnect the harness connector at the M75 Windshield Wiper Motor. It may take up to 2 min for all vehicle systems to power down.
2. Test for less than 10 Ω between the ground circuit terminal 2 and ground.
If 10 Ω or greater
1. Vehicle OFF.
2. Test for less than 2 Ω in the ground circuit end to end.
If 2 Ω or greater, repair the open/high resistance in the circuit.
If less than 2 Ω, repair the open/high resistance in the ground connection.
If less than 10 Ω
3. Vehicle in Service Mode.
4. Verify a test lamp illuminates between the B+ circuit terminal 1 and ground.
If the test lamp does not illuminate and the circuit fuse is good
1. Vehicle OFF.
2. Test for less than 2 Ω in the B+ circuit end to end.
If 2 Ω or greater, repair the open/high resistance in the circuit.
If less than 2 Ω, verify the fuse is OK and there is voltage at the fuse.
If the test lamp does not illuminate and the circuit fuse is open
1. Vehicle OFF, remove the test lamp.
2. Test for infinite resistance between the B+ circuit and ground.
If less than infinite resistance, repair the short to ground on the circuit.
If infinite resistance, M75 Windshield Wiper Motor
If the test lamp illuminates
5. Connect a test lamp between the control circuit terminal 3 and ground.
6. Verify the test lamp turns ON and OFF when turning the high speed wipers ON and OFF.
If the test lamp is always OFF
1. Vehicle OFF, remove the test lamp, disconnect the harness connector at the K9 Body Control Module.
2. Test for infinite resistance between the control circuit and ground.
If less than infinite resistance, repair the short to ground on the circuit.
If infinite resistance
3. Test for less than 2 Ω in the control circuit end to end.
If 2 Ω or greater, repair the open/high resistance in the circuit.
If less than 2 Ω, replace the K9 Body Control Module.
If the test lamp is always ON
1. Vehicle OFF, remove the test lamp, disconnect the harness connector at the K9 Body Control Module, vehicle in Service Mode.
2. Test for less than 1 V between the control circuit and ground.
If 1 V or greater, repair the short to voltage on the circuit.
If less than 1 V, replace the K9 Body Control Module.
If the test lamp turns ON and OFF
7. Remove the test lamp.
8. Test for 8 - 9 V between the serial data circuit terminal 4 and ground.
If less than 8 V
1. Vehicle OFF, disconnect the harness connector at the K9 Body Control Module.
2. Test for infinite resistance between the serial data circuit and ground.
If less than infinite resistance, repair the short to ground on the circuit.
If infinite resistance
3. Test for less than 2 Ω in the serial data circuit end to end.
If 2 Ω or greater, repair the open/high resistance in the circuit.
If less than 2 Ω, replace the K9 Body Control Module.
If greater than 9 V
1. Vehicle OFF, disconnect the harness connector at the K9 Body Control Module, vehicle in Service Mode.
2. Test for less than 1 V between the serial data circuit and ground.
If 1 V or greater, repair the short to voltage on the circuit.
If less than 1 V or greater, replace the K9 Body Control Module.
If 8 - 9 V
9. Test or replace the M75 Windshield Wiper Motor.
Component Testing
Windshield Wiper/Washer Switch
1. Vehicle OFF, disconnect the harness connector at the S82 Windshield Wiper/Washer Switch.
2. Test for infinite resistance between the signal terminal 1 and the low reference terminal 2 with the high speed switch in the open position.
If less than infinite resistance
Replace the S82 Windshield Wiper/Washer Switch.
If infinite resistance
3. Test for less than 2 Ω between the signal circuit terminal 1 and the low reference circuit terminal 2 with the high speed switch in the closed position.
If 2 Ω or greater
Replace the S82 Windshield Wiper/Washer Switch.
If less than 2 Ω
4. Test for infinite resistance between the signal terminal 3 and the low reference terminal 2 with the low speed switch in the open position.
If less than infinite resistance
Replace the S82 Windshield Wiper/Washer Switch.
If infinite resistance
5. Verify the resistance readings are within the specified range listed below between the signal circuit terminal 3 and the low reference circuit terminal 1 by pushing the switch in the listed positions below.
Delay 1 : 3.75-3.85kΩ
Delay 2 : 2.75-2.85kΩ
Delay 3 : 1.95-2.05kΩ
Delay 4 : 1.25-1.35kΩ
Delay 5 : 765-775Ω
If not within the specified range
Replace the S82 Windshield Wiper/Washer Switch.
If within the specified range
6. All OK
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Windshield Wiper System Module Replacement
Windshield Wiper and Washer Switch Replacement
Fuse Block Replacement
Control Module References
for body control module replacement, programming and setup.
DTC B371A: WINDSHIELD WIPER MOTOR INTERNAL MALFUNCTION
Diagnostic Instructions
Perform the
Diagnostic System Check - Vehicle
prior to using this diagnostic procedure.
Review Strategy Based Diagnosis
for an overview of the diagnostic approach.
Diagnostic Procedure Instructions
provides an overview of each diagnostic category.
DTC Descriptor
DTC B371A 39
Windshield Wiper Motor Internal Malfunction
Circuit/System Description
B+ voltage and ground are supplied to the windshield wiper motor. Whenever the vehice is ON or in Service Mode, the body control module (BCM) sends the wiper/washer switch status through the LIN communication bus. If a fault occurs at any time in the windshield wiper motor, the BCM will set the DTC.
Conditions for Running the DTC
The BCM runs the diagnostic to detect an internal fault when power up is commanded. The only requirements are voltage and ground. This diagnostic runs even if the voltage is out of the valid operating range.
Conditions for Setting the DTC
The BCM receives an invalid signal from the windshield wiper motor.
Action Taken When the DTC Sets
The BCM ignores all additional inputs.
Conditions for Clearing the DTC
A current DTC clears when the diagnostic runs and passes.
Reference Information
Schematic Reference
Wiper/Washer Schematics
Connector End View Reference
COMPONENT CONNECTOR END VIEWS - INDEX
Description and Operation
Wiper/Washer System Description and Operation
Electrical Information Reference
Circuit Testing
Connector Repairs
Testing for Intermittent Conditions and Poor Connections
Wiring Repairs
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
1. Vehicle in Service Mode.
2. Verify that there is no communications DTC set.
If there is a communications DTC set
Refer to Diagnostic Trouble Code (DTC) List - Vehicle .
If there is no communications DTC set
3. Verify that DTC B371A is not set.
If DTC B371A is set
Replace the M75 Windshield Wiper Motor.
If DTC B371A is not set
4. All OK.
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Windshield Wiper System Module Replacement
DTC B371C: FRONT WIPER MOTOR 2
Diagnostic Instructions
Perform the
Diagnostic System Check - Vehicle
prior to using this diagnostic procedure.
Review Strategy Based Diagnosis
for an overview of the diagnostic approach.
Diagnostic Procedure Instructions
provides an overview of each diagnostic category.
DTC Descriptor
DTC B371C
Front Wiper Motor 2
For symptom byte information, refer to Symptom Byte List .
Circuit/System Description
B+ voltage and ground are supplied to the windshield wiper motor. Whenever the vehice is ON or in Service Mode, the body control module (BCM) sends the wiper/washer switch status through the LIN communication bus. If a fault occurs at any time in the windshield wiper motor, the BCM will set the DTC.
Conditions for Running the DTC
The BCM runs the diagnostic to detect an internal fault when power up is commanded. The only requirements are voltage and ground. This diagnostic runs even if the voltage is out of the valid operating range.
Conditions for Setting the DTC
The BCM receives an invalid signal from the windshield wiper motor.
Action Taken When the DTC Sets
The BCM ignores all additional inputs.
Conditions for Clearing the DTC
A current DTC clears when the diagnostic runs and passes.
Reference Information
Schematic Reference
Wiper/Washer Schematics
Connector End View Reference
COMPONENT CONNECTOR END VIEWS - INDEX
Description and Operation
Wiper/Washer System Description and Operation
Electrical Information Reference
Circuit Testing
Connector Repairs
Testing for Intermittent Conditions and Poor Connections
Wiring Repairs
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
1. Vehicle in Service Mode.
2. Verify that there is no communications DTC set.
If there is a communications DTC set
Refer to Diagnostic Trouble Code (DTC) List - Vehicle .
If there is no communications DTC set
3. Verify that DTC B371C is not set.
If DTC B371C is set
Replace the M75 Windshield Wiper Motor.
If DTC B371C is not set
4. All OK.
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Windshield Wiper System Module Replacement
DTC B3873: FRONT WASHER RELAY CIRCUIT
Diagnostic Instructions
Perform the
Diagnostic System Check - Vehicle
prior to using this diagnostic procedure.
Review Strategy Based Diagnosis
for an overview of the diagnostic approach.
Diagnostic Procedure Instructions
provides an overview of each diagnostic category.
DTC Descriptors
DTC B3873
Front Washer Relay Circuit
For symptom byte information, refer to Symptom Byte List .
Diagnostic Fault Information
|
Circuit |
Short to Ground |
Open/High Resistance |
Short to Voltage |
Signal Performance |
|
Control |
B3873 02 |
B3873 04 |
B3873 01 |
- |
Circuit/System Description
The windshield washer pump is controlled by the body control module (BCM) via a printed circuit board (PCB) relay. When the washer switch is depressed, the BCM's internally pulled high resistor is pulled low by the washer request circuit. The BCM then applies voltage through a control circuit to the PCB windshield washer pump relay. With the relay energized, fused battery voltage is applied through the switch contacts of the relay and the control circuit to activate the windshield washer fluid pump.
Conditions for Running the DTC
Vehicle ON or in Service Mode
The system voltage is between 9 - 16 V.
Conditions for Setting the DTC
B3873 01
The body control module detects a short to B+ in the windshield washer pump relay control circuit
B3873 02
The body control module detects a short to ground in the windshield washer pump relay control circuit
B3873 04
The body control module detects an open or high resistance in the windshield washer pump relay control circuit
Action Taken When the DTC Sets Washer operation is suspended. Conditions for Clearing the DTC
A current DTC clears when the diagnostic runs and passes.
Reference Information
Schematic Reference
Wiper/Washer Schematics
Connector End View Reference
COMPONENT CONNECTOR END VIEWS - INDEX
Description and Operation
Wiper/Washer System Description and Operation
Electrical Information Reference
Circuit Testing
Connector Repairs
Testing for Intermittent Conditions and Poor Connections
Wiring Repairs
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
1. Vehicle in Service Mode.
2. Verify the G24 Windshield Washer Pump activates when commanding the Windshield Washer Relay On and Off with a scan tool.
If the G24 Windshield Washer Pump does not activate
Refer to Circuit/System Testing
If the G24 Windshield Washer Pump activates
3. All OK.
Circuit/System Testing
1. Vehicle OFF, disconnect the X4 harness connector at the K9 Body Control Module, vehicle in Service Mode.
2. Verify the G24 Windshield Washer Pump is not activated.
If the G24 Windshield Washer Pump is activated
1. Vehicle OFF, disconnect the X2 harness connector at the X50A Fuse Block - Underhood, vehicle in Service Mode.
2. Test for less than 1 V between the K9 Body Control Module control circuit terminal 14 X4 and ground.
If 1 V or greater, repair the short to voltage on the circuit.
If less than 1 V, replace the X50A Fuse Block - Underhood.
If the G24 Windshield Washer Pump is not activated
3. Connect a 10 A fused jumper wire between the control circuit terminal 14 and B+.
4. Verify the G24 Windshield Washer Pump activates.
If the G24 Windshield Washer Pump does not activate
1. Vehicle OFF, remove the jumper wire, disconnect the X2 harness connector at the X50A Fuse
Block - Underhood.
2. Test for infinite resistance between the control circuit and ground.
If less than infinite resistance, repair the short to ground on the circuit.
If less than infinite resistance
3. Test for less than 2 Ω in the control circuit end to end.
If 2 Ω or greater, repair the open/high resistance in the circuit.
If less than 2 Ω, test or replace the X50A Fuse Block - Underhood.
If the G24 Windshield Washer Pump activates
5. Replace the K9 Body Control Module.
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Fuse Block Replacement
Control Module References
for body control module replacement, programming and setup.
SYMPTOMS - WIPER/WASHER SYSTEMS
NOTE: The following steps must be completed before using the symptom tables:
1. Perform Diagnostic System Check - Vehicle , in order to verify that all of the following conditions are true:
No DTCs are set.
The control modules can communicate via the serial data link.
2. Refer to Wiper/Washer System Description and Operation in order to familiarize yourself with the system functions.
Visual/Physical Inspection
Inspect for aftermarket devices which may affect the operation of the windshield wiper/washer system.
Refer to Checking Aftermarket Accessories .
Inspect the easily accessible or visible system components for obvious damage or conditions which may cause the symptom.
Inspect the washer fluid reservoir for the proper fluid level.
Intermittent
Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent Conditions and Poor Connections .
Symptom List
Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom:
Windshield Wiper System Malfunction
Washer Malfunction
WINDSHIELD WIPER SYSTEM MALFUNCTION
Diagnostic Instructions
Perform the
Diagnostic System Check - Vehicle
prior to using this diagnostic procedure.
Review Strategy Based Diagnosis
for an overview of the diagnostic approach.
Diagnostic Procedure Instructions
provides an overview of each diagnostic category.
Diagnostic Fault Information
|
Circuit |
Short to Ground |
Open/High Resistance |
Short to Voltage |
Signal Performance |
|
Windshield Wiper Motor Module B+ |
1 |
1 |
- |
- |
|
Windshield Wiper Motor Serial Data |
U1515 00 |
U1515 00 |
U1515 00 |
- |
|
Windshield Wiper Motor Relay Coil Supply Voltage |
- |
- |
- |
- |
|
Windshield Wiper/Washer Switch Signal Terminal 3 |
4 |
3 |
- |
- |
|
Windshield Wiper/Washer Switch Signal Terminal 1 |
4 |
2 |
- |
- |
|
Windshield Wiper Motor Module Ground |
- |
1, 2, 3 |
- |
- |
|
Windshield Wiper/Washer Switch Low Reference |
- |
1 |
1 |
- |
|
1. Windshield Wipers Inoperative 2. Windshield Wipers High Speed Inoperative 3. Windshield Wipers Intermittent or Low Speed Inoperative 4. Windshield Wipers Always ON |
||||
Circuit/System Description
The body control module (BCM) controls the windshield wiper motor based on inputs from the windshield wiper/washer switch, and when intermittent mode is selected, the rain/ambient light sensor module. The BCM monitors the windshield wiper/washer switch through two separate signal circuits and a low reference circuit. The windshield wiper/washer switch utilizes resistive multiplexing to signal a low speed and intermittent operation request to the BCM while a separate discrete signal circuit is used to indicate a high speed wiper request. When the wiper switch is placed in the low speed or intermittent position, the BCM monitors the voltage drop, which changes dependent upon switch position, over an internal pulled high resistor. The BCM will respond by commanding on the low speed or intermittent wipers. With the windshield wiper/washer switch in the high speed position, the BCM's high speed signal circuit is pulled low. The BCM will respond by commanding the windshield wiper motor to operate at high speed via serial data.
Reference Information
Schematic Reference
Wiper/Washer Schematics
Connector End View Reference
COMPONENT CONNECTOR END VIEWS - INDEX
Description and Operation
Wiper/Washer System Description and Operation
Electrical Information Reference
Circuit Testing
Connector Repairs
Testing for Intermittent Conditions and Poor Connections
Wiring Repairs
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
1. Vehicle ON.
2. Verify that there are no communications DTCs set.
If any communication DTCs are set
Refer to Diagnostic Trouble Code (DTC) List - Vehicle .
If no communication DTCs are set
3. Verify that DTC B371A is not set.
If DTC B371A is set
Refer to DTC B371A.
If DTC B371A is not set
4. Verify the scan tool Windshield Wiper High Speed Switch parameter changes between Active and Inactive when activating the high speed windshield wipers.
If the parameter does not change
Refer to Circuit/System Testing - Windshield Wiper/Washer Switch Malfunction.
If the parameter changes
5. Verify the scan tool Windshield Wiper Switch parameter changes between Off and Low when activating the low speed windshield wipers.
If the parameter does not change
Refer to Circuit/System Testing - Windshield Wiper/Washer Switch Malfunction.
If the parameter changes
6. Verify the scan tool Windshield Wiper Switch parameter changes between Delay 1 and Delay 5 when cycling the intermittent speed windshield wipers.
If the parameter does not change
Test or replace the S82 Windsheild Wiper/Washer Switch.
If the parameter changes
7. Verify the M75 Windshield Wiper Motor changes between Off, Low, and High when cycling the S82 Windshield Wiper/Washer Switch between Off, Low, and High.
If the M75 Windshield Wiper Motor does not cycle between Off, Low, and High
Refer to Circuit/System Testing - Windshield Wiper Motor Malfunction
If the M75 Windshield Wiper Motor cycles between Off, Low, and High
8. All OK.
Circuit/System Testing
Windshield Wiper/Washer Switch Malfunction
1. Vehicle OFF and all vehicle systems OFF, disconnect the harness connector at the S82 Windshield Wiper/Washer Switch. It may take up to 11 min for all vehicle systems to power down.
2. Test for less than 10 Ω between the low reference circuit terminal 1 and ground.
If 10 Ω or greater
1. Vehicle OFF, disconnect the harness connector at the K9 Body Control Module.
2. Test for less than 2 Ω in the low reference circuit end to end.
If 2 Ω or greater, repair the open/high resistance in the circuit.
If less than 2 Ω, replace the K9 Body Control Module.
If less than 10 Ω
3. Vehicle in Service Mode.
4. Verify the scan tool Windshield Wiper High Speed Switch parameter is Inactive.
If not Inactive
1. Vehicle OFF, disconnect the harness connector at the K9 Body Control Module.
2. Test for infinite resistance between the signal circuit terminal 2 and ground.
If less than infinite resistance, repair the short to ground on the circuit.
If infinite resistance, replace the K9 Body Control Module.
If Inactive
5. Install a 3 A fused jumper wire between the signal circuit terminal 2 and the low reference circuit terminal 1.
6. Verify the scan tool Windshield Wiper High Speed Switch parameter is Active.
If not Active
1. Vehicle OFF, remove the jumper wire, disconnect the harness connector at the K9 Body Control
Module, vehicle in Service Mode.
2. Test for less than 1 V between the signal circuit and ground.
If 1 V or greater, repair the short to voltage on the circuit.
If less than 1 V
3. Test for less than 2 Ω in the signal circuit end to end.
If 2 Ω or greater, repair the open/high resistance in the circuit.
If less than 2 Ω, replace the K9 Body Control Module.
If Active
7. Test for greater than 8 V between the signal circuit terminal 3 and ground.
If less than 8 V
1. Vehicle OFF, disconnect the harness connector at the K9 Body Control Module.
2. Test for infinite resistance between the signal circuit and ground
If less than infinite resistance, repair the short to ground on the circuit.
If infinite resistance
3. Test for less than 2 Ω in the signal circuit end to end.
If 2 Ω or greater, repair the open/high resistance in the circuit.
If less than 2 Ω, replace the K9 Body Control Module.
If 8 V or greater
8. Vehicle OFF, disconnect the X3 harness connector at the K9 Body Control Module, vehicle in Service Mode.
9. Test for less than 1 V between the S82 Windshield Wiper/Washer Switch signal circuit terminal 3 and ground.
If 1 V or greater
Repair the short to voltage on the circuit.
If less than 1 V
10. Test or replace the S82 Windshield Wiper/Washer Switch.
Windshield Wiper Motor Malfunction
1. Vehicle OFF and all vehicle systems OFF, disconnect the harness connector at the M75 Windshield Wiper Motor. It may take up to 2 min for all vehicle systems to power down.
2. Test for less than 10 Ω between the ground circuit terminal 2 and ground.
If 10 Ω or greater
1. Vehicle OFF.
2. Test for less than 2 Ω in the ground circuit end to end.
If 2 Ω or greater, repair the open/high resistance in the circuit.
If less than 2 Ω, repair the open/high resistance in the ground connection.
If less than 10 Ω
3. Vehicle in Service Mode.
4. Verify a test lamp illuminates between the B+ circuit terminal 1 and ground.
If the test lamp does not illuminate and the circuit fuse is good
1. Vehicle OFF.
2. Test for less than 2 Ω in the B+ circuit end to end.
If 2 Ω or greater, repair the open/high resistance in the circuit.
If less than 2 Ω, verify the fuse is OK and there is voltage at the fuse.
If the test lamp does not illuminate and the circuit fuse is open
1. Vehicle OFF, remove the test lamp.
2. Test for infinite resistance between the B+ circuit and ground.
If less than infinite resistance, repair the short to ground on the circuit.
If infinite resistance, M75 Windshield Wiper Motor
If the test lamp illuminates
5. Connect a test lamp between the control circuit terminal 3 and ground.
6. Verify the test lamp turns ON and OFF when turning the high speed wipers ON and OFF.
If the test lamp is always OFF
1. Vehicle OFF, remove the test lamp, disconnect the harness connector at the K9 Body Control Module.
2. Test for infinite resistance between the control circuit and ground.
If less than infinite resistance, repair the short to ground on the circuit.
If infinite resistance
3. Test for less than 2 Ω in the control circuit end to end.
If 2 Ω or greater, repair the open/high resistance in the circuit.
If less than 2 Ω, replace the K9 Body Control Module.
If the test lamp is always ON
1. Vehicle OFF, remove the test lamp, disconnect the harness connector at the K9 Body Control Module, vehicle in Service Mode.
2. Test for less than 1 V between the control circuit and ground.
If 1 V or greater, repair the short to voltage on the circuit.
If less than 1 V, replace the K9 Body Control Module.
If the test lamp turns ON and OFF
7. Remove the test lamp.
8. Test for 8 - 9 V between the serial data circuit terminal 4 and ground.
If less than 8 V
1. Vehicle OFF, disconnect the harness connector at the K9 Body Control Module.
2. Test for infinite resistance between the serial data circuit and ground.
If less than infinite resistance, repair the short to ground on the circuit.
If infinite resistance
3. Test for less than 2 Ω in the serial data circuit end to end.
If 2 Ω or greater, repair the open/high resistance in the circuit.
If less than 2 Ω, replace the K9 Body Control Module.
If greater than 9 V
1. Vehicle OFF, disconnect the harness connector at the K9 Body Control Module, vehicle in Service Mode.
2. Test for less than 1 V between the serial data circuit and ground.
If 1 V or greater, repair the short to voltage on the circuit.
If less than 1 V or greater, replace the K9 Body Control Module.
If 8 - 9 V
9. Test or replace the M75 Windshield Wiper Motor.
Component Testing
Windshield Wiper/Washer Switch
1. Vehicle OFF, disconnect the harness connector at the S82 Windshield Wiper/Washer Switch.
2. Test for infinite resistance between the signal terminal 1 and the low reference terminal 2 with the high speed switch in the open position.
If less than infinite resistance
Replace the S82 Windshield Wiper/Washer Switch.
If infinite resistance
3. Test for less than 2 Ω between the signal circuit terminal 1 and the low reference circuit terminal 2 with the high speed switch in the closed position.
If 2 Ω or greater
Replace the S82 Windshield Wiper/Washer Switch.
If less than 2 Ω
4. Test for infinite resistance between the signal terminal 3 and the low reference terminal 2 with the low speed switch in the open position.
If less than infinite resistance
Replace the S82 Windshield Wiper/Washer Switch.
If infinite resistance
5. Verify the resistance readings are within the specified range listed below between the signal circuit terminal 3 and the low reference circuit terminal 1 by pushing the switch in the listed positions below.
Delay 1 : 3.75-3.85kΩ
Delay 2 : 2.75-2.85kΩ
Delay 3 : 1.95-2.05kΩ
Delay 4 : 1.25-1.35kΩ
Delay 5 : 765-775Ω
If not within the specified range
Replace the S82 Windshield Wiper/Washer Switch.
If within the specified range
6. All OK
Repair Instructions
Perform the Diagnostic Repair Verification after completing the repair.
Windshield Wiper System Module Replacement
Windshield Wiper and Washer Switch Replacement
Fuse Block Replacement
Control Module References
for body control module replacement, programming and setup.
LOW WASHER FLUID INDICATOR MALFUNCTION
Diagnostic Instructions
Perform the
Diagnostic System Check - Vehicle
prior to using this diagnostic procedure.
Review Strategy Based Diagnosis
for an overview of the diagnostic approach.
Diagnostic Procedure Instructions
provides an overview of each diagnostic category.
Diagnostic Fault Information
|
Circuit |
Short to Ground |
Open/High Resistance |
Short to Voltage |
Signal Performance |
|
Signal |
2 |
1 |
- |
- |
|
Ground |
- |
1 |
- |
- |
|
1. Low washer fluid message always displayed 2. Low washer fluid message never displayed |
||||
Circuit/System Description
The check washer fluid message is controlled by the instrument cluster using signal from the Windshield Washer Fluid level Sensor. The washer fluid level signal circuit is supplied voltage through a resistor then monitored within the instrument cluster. The Windshield Washer Fluid level Sensor is normally open so the instrument cluster detects voltage on the Windshield Washer Fluid level Sensor signal circuit whenever the washer fluid level sensor is low. When the washer fluid reaches the point where the driver should be informed that the washer fluid is low, the washer fluid level sensor closes. When the washer fluid level sensor is closed the washer fluid level signal circuit voltage is pulled low, and the instrument cluster displays the Adding Washer Fluid message on the driver information center. In order to prevent the Adding Washer Fluid message from being displayed while sloshing is occurring in the washer fluid container, the instrument cluster is programed with a 1 min delay before changing states of the check washer fluid message during an ignition cycle.
Reference Information
Schematic Reference
Wiper/Washer Schematics
Connector End View Reference
COMPONENT CONNECTOR END VIEWS - INDEX
Description and Operation
Wiper/Washer System Description and Operation
Electrical Information Reference
Circuit Testing
Connector Repairs
Testing for Intermittent Conditions and Poor Connections
Wiring Repairs
Scan Tool Reference
Control Module References for Scan Tool Information
Circuit/System Verification
1. Ignition ON.
2. Verify the scan tool Washer Fluid Level Switch parameter changes between ON and OFF, when filling and emptying the windshield water bottle.
If the parameter does not change
Refer to Circuit/System Testing.
If the parameter changes
3. All OK.
Circuit/System Testing
1. Ignition OFF and all vehicle systems OFF, disconnect the harness connector at the B118B Windshield Washer Fluid Level Switch. It may take up to 2 min for all vehicle systems to power down.
2. Test for less than 10 Ω between the ground circuit terminal 2 and ground.
If 10 Ω or greater
1. Ignition OFF.
2. Test for less than 2 Ω in the ground circuit end to end.
If 2 Ω or greater, repair the open/high resistance in the circuit.
If less than 2 Ω, repair the open/high resistance in the ground connection.
If less than 10 Ω
3. Ignition ON.
4. Verify the scan tool Washer Fluid Level Switch parameter is Off
If not Off
1. Ignition OFF, disconnect the harness connector at the P16 Instrument Cluster.
2. Test for infinite resistance between the signal circuit terminal 1 and ground.
If less than infinite resistance, repair the short to ground on the circuit.
If infinite resistance, replace the P16 Instrument Cluster.
If Off
5. Install a 3 A fused jumper wire between the signal circuit terminal 1 and the ground circuit terminal 2.
6. Verify the scan tool Washer Fluid Level Switch parameter is On.
If not On
1. Ignition OFF, remove the jumper wire, disconnect the harness connector at the P16 Instrument Cluster, ignition ON.
2. Test for less than 1 V between the signal circuit and ground.
If 1 V or greater, repair the short to voltage on the circuit.
If less than 1 V
3. Test for less than 2 Ω in the signal circuit end to end.
If 2 Ω or greater, repair the open/high resistance in the circuit.
If less than 2 Ω, replace the P16 Instrument Cluster.
If On
7. Test or replace the B118B Windshield Washer Fluid Level Switch.
Repair Instructions
Perform the Diagnostic Repair Verification after completing the repair.
Windshield Washer Solvent Container Replacement
Control Module References
for instrument cluster replacement, programming and setup
WASHER MALFUNCTION
Diagnostic Instructions
Perform the
Diagnostic System Check - Vehicle
prior to using this diagnostic procedure.
Review Strategy Based Diagnosis
for an overview of the diagnostic approach.
Diagnostic Procedure Instructions
provides an overview of each diagnostic category.
DTC Descriptors
DTC B3873
Front Washer Relay Circuit
For symptom byte information, refer to Symptom Byte List .
Diagnostic Fault Information
|
Circuit |
Short to Ground |
Open/High Resistance |
Short to Voltage |
Signal Performance |
|
B+ |
- |
3 |
- |
- |
|
Circuit |
Short to Ground |
Open/High Resistance |
Short to Voltage |
Signal Performance |
|
Windshield Washer Switch Signal |
1, 2 |
1 |
1 |
- |
|
Windshield Washer Pump Control |
3 |
3 |
2 |
- |
|
Windshield Washer Pump Relay Control |
B3873 02 |
B3873 04 |
B3873 01 |
- |
|
Underhood Fuse Block Ground |
- |
3 |
- |
- |
|
Windshield Washer Pump Ground |
- |
3 |
- |
- |
|
1. Windshield Washer Switch Malfunction 2. Windshield Washer Pump Always ON 3. Windshield Washer Pump Inoperative |
||||
Circuit/System Description
The windshield washer pump is controlled by the body control module (BCM) via a printed circuit board (PCB) relay. When the washer switch is depressed, the BCM's internally pulled high resistor is pulled low by the washer request circuit. The BCM then applies voltage through a control circuit to the PCB windshield washer pump relay. With the relay energized, fused battery voltage is applied through the switch contacts of the relay and the control circuit to activate the windshield washer fluid pump.
Reference Information
Schematic Reference
Wiper/Washer Schematics
Connector End View Reference
COMPONENT CONNECTOR END VIEWS - INDEX
Description and Operation
Wiper/Washer System Description and Operation
Electrical Information Reference
Circuit Testing
Connector Repairs
Testing for Intermittent Conditions and Poor Connections
Wiring Repairs
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
1. Vehicle in Service Mode.
2. Verify the scan tool Windshield Washer Switch parameter changes between Active and Inactive when
pressing the windshield washer switch.
If the parameter does not change
Refer to Circuit/System Testing - Windshield Wiper/Washer Switch Malfunction.
If the parameter changes
3. Verify the G24 Windshield Washer Pump activates and deactivates when commanding the Windshield Washer Relay Active and Inactive with a scan tool.
If the G24 Windshield Washer Pump does not activate or does not deactivate
Refer to Circuit/System Testing - Windshield Washer Pump Malfunction
If the G24 Windshield Washer Pump activates and deactivates
4. All OK.
Circuit/System Testing
Windshield Wiper/Washer Switch Malfunction
1. Vehicle OFF and all vehicle systems OFF, disconnect the harness connector at the S82 Windshield Wiper/Washer Switch. It may take up to 11 min for all vehicle systems to power down.
2. Test for less than 10 Ω between the low reference circuit terminal 2 and ground.
If 10 Ω or greater
1. Vehicle OFF.
2. Test for less than 2 Ω in the low reference circuit end to end.
If 2 Ω or greater, repair the open/high resistance in the circuit.
If less than 2 Ω, replace the K9 Body Control Module.
If less than 10 Ω
3. Vehicle in Service Mode.
4. Verify the scan tool Windshield Washer Switch parameter is Inactive.
If not Inactive
1. Vehicle OFF, disconnect the harness connector at the K9 Body Control Module.
2. Test for infinite resistance between the signal circuit terminal 5 and ground.
If less than infinite resistance, repair the short to ground on the circuit.
If infinite resistance, replace the K9 Body Control Module.
If Inactive
5. Install a 3 A fused jumper wire between the signal circuit terminal 5 and the low reference circuit terminal 2.
6. Verify the scan tool Windshield Washer Switch parameter is Active.
If not Active
1. Vehicle OFF, remove the jumper wire, disconnect the harness connector at the K9 Body Control Module, vehicle in Service Mode.
2. Test for less than 1 V between the signal circuit and ground.
If 1 V or greater, repair the short to voltage on the circuit.
If less than 1 V
3. Test for less than 2 Ω in the signal circuit end to end.
If 2 Ω or greater, repair the open/high resistance in the circuit.
If less than 2 Ω, replace the K9 Body Control Module.
If Active
7. Test or replace the S82 Windshield Wiper/Washer Switch.
Windshield Washer Pump Malfunction
1. Vehicle OFF, and all vehicle systems OFF. Disconnect the harness connector at the G24 Windshield Washer Pump. It may take up to 2 min for all vehicle systems to power down.
2. Test for less than 10 Ω between the ground circuit terminal 2 and ground.
If 10 Ω or greater
1. Test for less than 2 Ω in the ground circuit end to end.
If 2 Ω or greater, repair the open/high resistance in the circuit.
If less than 2 Ω, repair the open/high resistance in the ground connection.
If less than 10 Ω
3. Connect a test lamp between the control circuit terminal 1 and the ground circuit terminal 2, vehicle in Service Mode.
4. Verify the test lamp turn ON and OFF when commanding the Windshield Washer Relay Active and Inactive with a scan tool.
If the test lamp turns ON and OFF
Test or replace the G24 Windshield Washer Pump.
If the test lamp does not turn ON and OFF
5. Vehicle OFF, connect the harness connector at the G24 Windshield Washer Pump. Disconnect the X1 harness connector at the X50A Fuse Block - Underhood. It may take up to 2 min for all vehicle systems to power down.
6. Test for less than 10 Ω between the ground circuit terminal 48 and ground.
If 10 Ω or greater
1. Test for less than 2 Ω in the ground circuit end to end.
If 2 Ω or greater, repair the open/high resistance in the circuit.
If less than 2 Ω, repair the open/high resistance in the ground connection.
If less than 10 Ω
7. Vehicle in Service Mode.
8. Verify the G24 Windshield Washer Pump is not activated.
If the G24 Windshield Washer Pump is activated
1. Vehicle OFF, disconnect the harness connector at the G24 Windshield Washer Pump, vehicle in Service Mode.
2. Test for less than 1 V between the control circuit terminal 1 and ground.
If 1 V or greater, repair the short to voltage on the circuit.
If less than 1 V, replace the G24 Windshield Washer Pump.
If the G24 Windshield Washer Pump is not activated
9. Connect a 20 A fused jumper wire between the control circuit terminal 14 and B+.
10. Verify the G24 Windshield Washer Pump activates.
If the G24 Windshield Washer Pump does not activate
1. Vehicle OFF, remove the jumper wire, disconnect the harness connector at the G24 Windshield Washer Pump.
2. Test for infinite resistance between the control circuit and ground.
If less than Infinite resistance, repair the short to ground on the circuit.
If infinite resistance
3. Test for less than 2 Ω in the control circuit end to end.
If 2 Ω or greater, repair the open/high resistance in the circuit.
If less than 2 Ω, replace the G24 Windshield Washer Pump.
If the G24 Windshield Washer Pump activates
11. Vehicle OFF, connect the X1 harness connector at the X50A Fuse Block - Underhood. Disconnect the X4 harness connector at the K9 Body Control Module, vehicle in Service Mode.
12. Verify the G24 Windshield Washer Pump is not activated.
If the G24 Windshield Washer Pump is activated
1. Vehicle OFF, disconnect the X2 harness connector at the X50A Fuse Block - Underhood, vehicle in Service Mode.
2. Test for less than 1 V between the K9 Body Control Module control circuit terminal 14 X4 and ground, vehicle in Service Mode.
If 1 V or greater, repair the short to voltage on the circuit.
If less than 1 V, replace the X50A Fuse Block - Underhood.
If the G24 Windshield Washer Pump is not activated
13. Connect a 10 A fused jumper wire between the control circuit terminal 14 and B+.
14. Verify the G24 Windshield Washer Pump activates.
If the G24 Windshield Washer Pump does not activate
1. Vehicle OFF, remove the jumper wire, disconnect the X2 harness connector at the X50A Fuse Block - Underhood.
2. Test for infinite resistance between the control circuit and ground.
If less than infinite resistance, repair the short to ground on the circuit.
If less than infinite resistance
3. Test for less than 2 Ω in the control circuit end to end.
If 2 Ω or greater, repair the open/high resistance in the circuit.
If less than 2 Ω, test or replace the X50A Fuse Block - Underhood.
If the G24 Windshield Washer Pump activates
15. Replace the K9 Body Control Module.
Component Testing
Windshield Wiper/Washer Switch
1. Vehicle OFF, disconnect the harness connector at the S82 Windshield Wiper/Washer Switch.
2. Test for infinite resistance between the signal terminal 5 and the low reference terminal 2 with the switch in the open position.
If less than infinite resistance
Replace the S82 Windshield Wiper/Washer Switch.
If infinite resistance
3. Test for less than 2 Ω between the signal circuit terminal 5 and the low reference circuit terminal 2 with the switch in the closed position.
If 2 Ω or greater
Replace the S82 Windshield Wiper/Washer Switch.
If less than 2 Ω
4. All OK
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Windshield Washer Pump Replacement
Windshield Wiper and Washer Switch Replacement
Fuse Block Replacement
Control Module References
for body control module replacement, programming and setup.
WIPER BLADE ELEMENT CHECK
Fig. 2: Wiper Blade Element Check
Courtesy of GENERAL MOTORS COMPANY
1. Remove the wiper blade from the wiper arm. Refer to Windshield Wiper Blade Replacement.
2. Look down the entire length of the blade element.
3. The rubber part of the element (2) that contacts the window must be on the center line of the blade plus or minus 15 degrees (1).
4. Replace the blade element (2) if the element exceeds 15 degrees from the centerline of the blade, or if the element is cracked or torn. Refer to Windshield Wiper Blade Replacement
5. Install the wiper blade onto the windshield wiper arm.
REPAIR INSTRUCTIONS
WINDSHIELD WIPER AND WASHER SWITCH REPLACEMENT
Fig. 3: Windshield Wiper and Washer Switch Courtesy of GENERAL MOTORS COMPANY
|
Callout |
Component Name |
|
Preliminary Procedures 1. Steering Column Lower Trim Cover Replacement 2. Reposition the steering column upper trim cover as necessary. |
|
|
1 |
Windshield Wiper and Washer Switch Procedure 1. Disconnect the electrical connector. 2. Release the retaining tabs and remove the windshield wiper and washer switch from the turn signal switch bracket. |
WINDSHIELD WASHER NOZZLE HOSE REPLACEMENT
Fig. 4: Windshield Washer Nozzle Hose Courtesy of GENERAL MOTORS COMPANY
|
Callout |
Component Name |
|
WARNING: Always perform the High Voltage Disabling procedure prior to servicing any High Voltage component or connection. Personal Protection Equipment (PPE) and proper procedures must be followed. The High Voltage Disabling procedure includes the following steps:
|
|
|
Callout |
Component Name |
|
presence of high voltage.
Before working on any high voltage system, be sure to wear the following Personal Protection Equipment:
meters (50 feet) of the vehicle, either indoors or outdoors.
|
|
|
Callout |
Component Name |
|
protectors at all times when working with the high voltage battery assembly, whether the system is energized or not. Failure to follow the procedures may result in serious injury or death.
Preliminary Procedures 1. Front Wheelhouse Liner Replacement (Left Side) Front Wheelhouse Liner Replacement (Right Side) 2. Drain the windshield washer solvent into a suitable clean container. 3. Remove Windshield Washer Nozzle Hose@Windshield Washer Solvent Container Windshield Washer Solvent Container Replacement 4. Hood Insulator Replacement |
|
|
1 |
Windshield Washer Nozzle Hose Procedure 1. Remove the three washer nozzle hose retainers from the front wheelhouse panel inner front brace. 2. Remove the washer nozzle hose retainer from the hood hinge. 3. Remove the two washer nozzle hose retainers from the hood inner panel. 4. Remove the washer nozzle hose from both windshield washer nozzles. 5. Carefully remove the washer nozzle hose from the engine compartment. |
WINDSHIELD WASHER NOZZLE REPLACEMENT
Fig. 5: Windshield Washer Nozzle
Courtesy of GENERAL MOTORS COMPANY
|
Callout |
Component Name |
|
Preliminary Procedures 1. Open the hood. 2. Hood Insulator Replacement 3. Disconnect the windshield washer pump hose. |
|
|
1 |
Windshield Washer Nozzle Procedure Depress the windshield washer nozzle tabs and push the nozzle upward and outward from the hood. |
WINDSHIELD WASHER SOLVENT CONTAINER FILLER TUBE REPLACEMENT
Fig. 6: Windshield Washer Solvent Container Filler Tube Courtesy of GENERAL MOTORS COMPANY
|
Callout |
Component Name |
|
Preliminary Procedure Open the hood. |
|
|
1 |
Windshield Washer Solvent Container Filler Tube Procedure Pull upward on the filler tube in order to disconnect the filler tube from the windshield washer solvent container grommet. |
WINDSHIELD WASHER SOLVENT CONTAINER GROMMET REPLACEMENT
Fig. 7: Windshield Washer Solvent Container Grommet Courtesy of GENERAL MOTORS COMPANY
|
Callout |
Component Name |
|
Preliminary Procedure Windshield Washer Solvent Container Filler Tube Replacement |
|
|
1 |
Windshield Washer Solvent Container Grommet Procedure 1. Carefully squeeze the grommet while using a flat-bladed tool to pry upward under the edge of the grommet. 2. When installing a new grommet, use full strength windshield washer fluid as a lubricant on the grommet. 3. Place the grommet to the windshield washer solvent container. 4. Use the palm of the hand to seat the grommet into the windshield washer solvent container. |
WINDSHIELD WASHER SOLVENT CONTAINER REPLACEMENT
Fig. 8: Windshield Washer Solvent Container Courtesy of GENERAL MOTORS COMPANY
|
Callout |
Component Name |
|
Preliminary Procedures 1. Windshield Washer Solvent Container Filler Tube Replacement 2. Headlamp Replacement 3. Disconnect the electrical connectors. |
|
|
1 |
Windshield Washer Solvent Container Nut (Qty: 3)
CAUTION: Refer to Fastener Caution .
Tighten 9 N.m (80 lb in) |
|
2 |
Windshield Washer Pump Hose Procedure Disconnect the windshield washer pump hose. |
|
3 |
Windshield Washer Solvent Container Procedure |
|
Callout |
Component Name |
|
|
1. Remove the windshield washer solvent container from the vehicle. 2. Drain the windshield washer solvent into a suitable clean container. 3. Transfer components as necessary. 4. Fill the washer container with clean washer solvent once the installation has been completed. |
WINDSHIELD WASHER PUMP REPLACEMENT
Fig. 9: Windshield Washer Pump
Courtesy of GENERAL MOTORS COMPANY
|
Callout |
Component Name |
|
Preliminary Procedures 1. Front Bumper Fascia Removal and Installation 2. Place a clean suitable drain pan under the windshield washer solvent container to contain any lost windshield washer solvent. |
|
|
1 |
Windshield Washer Pump Procedure 1. Disconnect the electrical connector. 2. Disconnect the windshield washer pump hose. |
|
Callout |
Component Name |
|
|
3. Using two flat-bladed tools underneath the washer pump grommet, turn the flat-blades in opposite directions to disengage the washer pump from the washer pump grommet. 4. Remove the washer pump grommet and discard. |
WINDSHIELD WASHER PUMP GROMMET REPLACEMENT
Fig. 10: Windshield Washer Pump Grommet Courtesy of GENERAL MOTORS COMPANY
|
Callout |
Component Name |
|
Preliminary Procedure Windshield Washer Pump Replacement |
|
|
1 |
Windshield Washer Pump Grommet |
DASH UPPER EXTENSION PANEL OPENING COVER REPLACEMENT
Fig. 11: Dash Upper Extension Panel Opening Cover Courtesy of GENERAL MOTORS COMPANY
|
Callout |
Component Name |
|
Preliminary Procedure Air Inlet Grille Panel Replacement |
|
|
1 |
Dash Upper Extension Panel Opening Cover Retainer (Qty: 3) |
|
2 |
Dash Upper Extension Panel Opening Cover Bolt Plug (Qty: 6) |
|
3 |
Dash Upper Extension Panel Opening Cover Bolt (Qty: 2)
CAUTION: Fastener Caution
Tighten 22 N.m (16 lb in) |
|
4 |
Front Suspension Strut Housing Brace Bolt (Qty: 4) Tighten 22 N.m (16 lb ft) |
|
5 |
Dash Upper Extension Panel Opening Cover Procedure Transfer components as necessary.
NOTE: |
|
Callout |
Component Name |
|
|
Dash Upper Extension Panel Opening Cover and Front Suspension Strut Housing Brace are removed as an assembly. |
AIR INLET GRILLE PANEL REPLACEMENT
Fig. 12: Air Inlet Grille Panel
Courtesy of GENERAL MOTORS COMPANY
|
Callout |
Component Name |
|
WARNING: Always perform the High Voltage Disabling procedure prior to servicing any High Voltage |
|
|
Callout |
Component Name |
|
component or connection. Personal Protection Equipment (PPE) and proper procedures must be followed. The High Voltage Disabling procedure includes the following steps:
Before working on any high voltage system, be sure to wear the following Personal Protection Equipment:
meters (50 feet) of the vehicle, either indoors or outdoors. |
|
|
Callout |
Component Name |
|
Failure to follow the procedures may result in serious injury or death.
Preliminary Procedures 1. Windshield Wiper Arm Replacement 2. Air Inlet Grille Panel Extension Replacement 3. Hood Rear Weatherstrip Replacement |
|
|
1 |
Air Inlet Grille Panel Retainer (Qty: 8) Procedure Use a flat bladed plastic tool to remove the push-in retainers. |
|
Callout |
Component Name |
|
2 |
Air Inlet Grille Panel Procedure Lift the grille panel forward and upward to clear the pivot shafts from the vehicle. |
AIR INLET GRILLE PANEL EXTENSION REPLACEMENT
Fig. 13: Air Inlet Grille Panel Extension Courtesy of GENERAL MOTORS COMPANY
|
Callout |
Component Name |
|
1 |
Air Inlet Grille Panel Extension Procedure Disengage the retainers while working from the front to rear then pull the extension forward to remove. |
WINDSHIELD WIPER ARM REPLACEMENT
Fig. 14: Windshield Wiper Arm
Courtesy of GENERAL MOTORS COMPANY
|
Callout |
Component Name |
|
Preliminary Procedure Open the hood. |
|
|
1 |
Windshield Wiper Arm Finish Cap Procedure Using a flat balded tool, remove the cap from the wiper arm. |
|
2 |
Windshield Wiper Arm Nut
CAUTION: Refer to Fastener Caution .
Tighten 30 N.m (22 lb ft) |
|
3 |
Windshield Wiper Arm
CAUTION: To avoid breakage of the windshield, |
|
Callout |
Component Name |
|
|
protect the surrounding area of the part which you are removing or installing.
Procedure 1. Use the J 39822 Wiper Arm Puller to remove the wiper arm from the wiper motor pivot shaft. 2. Clean the pivot shaft splines with a soft wire brush. 3. Grasp the rear of the wiper arm, place the arm over the pivot shaft. 4. Align the tip of the wiper blade to the small transparent circle in the lower center windshield blackout area. 5. Install the windshield wiper arm nut. 6. Cycle the wiper arm with a spray of windshield washer solvent, PARK the wiper arms and re-check the alignment of the wiper blade tip to the windshield transparent circle.
Special Tools J 39822 Wiper Arm Puller |
WINDSHIELD WIPER BLADE REPLACEMENT
Fig. 15: Windshield Wiper Blade
Courtesy of GENERAL MOTORS COMPANY
|
Callout |
Component Name |
|
1 |
Windshield Wiper Blade Procedure 1. Lift the windshield wiper arm from the windshield. 2. Depress the small square tab on the topside of the wiper arm. 3. Rotate the blade downward and slide the wiper blade from the wiper arm. |
WINDSHIELD WIPER SYSTEM MODULE REPLACEMENT
Fig. 16: Windshield Wiper System Module Courtesy of GENERAL MOTORS COMPANY
|
Callout |
Component Name |
|
WARNING: Always perform the High Voltage Disabling procedure prior to servicing any High Voltage component or connection. Personal Protection Equipment (PPE) and proper procedures must be followed. The High Voltage Disabling procedure includes the following steps:
|
|
|
Callout |
Component Name |
|
test for the presence of high voltage.
Before working on any high voltage system, be sure to wear the following Personal Protection Equipment:
meters (50 feet) of the vehicle, either indoors or outdoors.
|
|
|
Callout |
Component Name |
|
leather protectors at all times when working with the high voltage battery assembly, whether the system is energized or not. Failure to follow the procedures may result in serious injury or death.
CAUTION: To avoid breakage of the windshield, protect the surrounding area of the part which you are removing or installing.
Preliminary Procedures 1. Open the hood. 2. Front Suspension Strut Housing Brace Replacement |
|
|
1 |
Windshield Wiper System Module Bolt (Qty: 3)
CAUTION: Refer to Fastener Caution . |
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Component Name |
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Tighten 9 N.m (80 lb in) |
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2 |
Windshield Wiper System Module Procedure 1. Slide a 3 foot piece of 5/16 inch rubber hose, cut along its length, along the edge of the windshield to prevent any accidental damage. Remove the hose before reinstalling components. 2. Lift the front edge of the assembly and pull slightly forward in order to disengage the center support from the backside of the plenum. 3. Disconnect the electrical connector. 4. Remove the system module from the plenum.
NOTE:
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Component Name |
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piece module assembly and replaced together. |
WINDSHIELD MULTIFUNCTION SENSOR MOUNT BRACKET COVER REPLACEMENT
Fig. 17: Windshield Multifunction Sensor Mount Bracket Cover Courtesy of GENERAL MOTORS COMPANY
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Component Name |
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1 |
Windshield Multifunction Sensor Mount Bracket Cover Procedure 1. Using a plastic trim tool, carefully pry downward on the sides of the bracket lower cover to release from the window. 2. Squeeze tabs on bracket cover and pull apart from bracket lower cover. |
WINDSHIELD MULTIFUNCTION SENSOR MOUNT BRACKET LOWER COVER REPLACEMENT
Fig. 18: Windshield Multifunction Sensor Mount Bracket Lower Cover Courtesy of GENERAL MOTORS COMPANY
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Component Name |
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Preliminary Procedure Windshield Multifunction Sensor Mount Bracket Cover Replacement |
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1 |
Windshield Multifunction Sensor Mount Bracket Lower Cover |
WINDSHIELD GLASS CLEANING
Exterior
Clean the windshield with windshield cleaner, GM P/N 19287404 (18 oz.) or 19259280 (6 oz.) (Canadian P/N 88865156) or equivalent. The cleaner should not harm the paint finish or scratch the glass. The glass is clean when the water no longer beads, but sheets across the entire glass surface.
Interior
The interior glass should be cleaned with plain water only applied with a clean terry cloth towel. Water only eliminates any film or haze on the window and helps prevent fogging.
WIPER BLADE ELEMENT CLEANING
Lift each blade assembly off of the windshield and clean the element with a cloth saturated with full strength washer solvent. Hold the blade in one hand and wipe the element with the saturated cloth until the black residue disappears. Then rinse the blade assembly elements with clean drinkable water.
WIPER CHATTER REPAIR
Some vehicles may exhibit a condition where the windshield wipers chatter and/or wipe unevenly. Several items may contribute to this condition. To completely repair this condition, ALL of the items listed should be inspected and corrected as necessary.
1. Inspect the wiper blade element set. Refer to Wiper Blade Element Check
2. Clean the wiper blade elements. Refer to Wiper Blade Element Cleaning
3. Clean the windshield. Refer to Windshield Glass Cleaning
DESCRIPTION AND OPERATION
WIPER/WASHER SYSTEM DESCRIPTION AND OPERATION
Wiper/Washer System Components
The wiper/washer system consists of the following electrical components:
Windshield Washer Pump Relay
Windshield Washer Pump
Windshield Wiper Motor
Windshield Wiper/Washer Switch
Underhood Fuse Block (Contains Windshield Washer Pump PCB Relay)
Body Control Module (BCM)
Windshield Wiper System
The body control module (BCM) controls the wiper motor based on an input from the wiper switch, and when wiper operation is requested, the BCM will send serial data messages to the windshield wiper motor module. The front wiper system consists of a driver's side and passenger's side wiper arm which are connected by a mechanical linkage driven by the windshield wiper motor module. The windshield wiper motor module contains the necessary electronics, motor, and position sensors to execute front wiper commands from the BCM. The windshield wiper motor module clears the front windshield by controlling the up and down wiper arm movement by the use of a reversing motor and an internal position sensor. The sensor keeps track of the gear wheel position and when the windshield wiper motor module determines that the wiper arms are at a position to reverse direction, it reverses the motor supply voltage by use of its internal motor control circuitry. The BCM communicates with the windshield wiper motor module through serial data. The windshield wiper motor module provides system status and diagnostic information to the BCM for diagnostic reporting and operational purposes.
The BCM utilizes resistive multiplexing through the wiper switch to discern the requested action from the driver. The BCM will respond by commanding the specific wiper function to operate as follows:
1. Using intermittent wipes, the wipers pause briefly on the windshield. If the wiper level is moved to OFF or if additional wipes are not required, the wipers may move to the base of the windshield.
2. If the ignition is put in OFF while the wipers are on LO, HI, or INT, they will immediately stop.
3. If the ignition is put in OFF while the wipers are performing wipes due to windshield washing, the wipers continue to run until they reach the base of the windshield.
4. the wipe delay interval is a function of the INTERMITTENT Delay Interval Switch setting. When
enabled, the Intermittent with Speed feature affects each of the 5 normal Intermittent Delay Intervals as a function of vehicle Speed. The Delay Intervals shall be biased to a shorter delay period with faster vehicle speeds and to a longer delay period with a slower vehicle speed.
The windshield wiper system MIST operation is identical to LOW speed operation, except that the MIST switch is a press and release type switch. When the wiper switch is moved to the MIST position (1X) and released, low speed wiper motor operation is started and will continue until 1 cycle is complete. If the wiper switch is moved to the MIST position and held, the wiper motor will operate in the LOW speed mode until the switch is released.
To initiate high speed wiping operation, the BCM provides continuous high speed wiper operation through setting the serial data signal to high speed Wipe. When the wiper switch lever is moved to the high position (HI) and released, high speed wiper motor operation is started and high speed wiping operation is performed.
Fig. 19: Windshield Wiper System Diagram Courtesy of GENERAL MOTORS COMPANY
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Callout |
Component Name |
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S82 |
S82 Windshield Wiper/Washer Switch |
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K9 |
K9 Body Control Module |
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M75 |
M75 Windshield Wiper Motor |
Windshield Washer System
The windshield washer pump is controlled by the body control module (BCM) via a printed circuit board (PCB) relay. When the washer switch is depressed, the BCM's internally pulled high resistor is pulled low by the washer request circuit. The BCM then applies voltage through a control circuit to the PCB windshield washer
pump relay. With the relay energized, fused battery voltage is applied through the switch contacts of the relay and the control circuit to activate the windshield washer fluid pump.
Fig. 20: Windshield Washer System Diagram Courtesy of GENERAL MOTORS COMPANY
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Callout |
Component Name |
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S82 |
S82 Windshield Wiper/Washer Switch |
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K9 |
K9 Body Control Module |
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G24 |
G24 Windshield Washer Pump |
SPECIAL TOOLS AND EQUIPMENT
SPECIAL TOOLS
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Tool Number/Description |
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J - 39822 Wiper Arm Puller |
