Wiper System & Washer System Chevrolet Avalanche II

Fastener Tightening Specifications

Scheme 1

Scheme 2

Scheme 3

Scheme 4

DIAGNOSTIC CODE INDEX

DIAGNOSTIC CODE INDEX

Diagnostic Starting Point - Wiper/Washer Systems

Begin the system diagnosis with Diagnostic System Check - Vehicle (with HP2) or Diagnostic System Check - Vehicle (without HP2) . The Diagnostic System Check will provide the following information

1. The identification of the control modules which command the system
2. The identification of any stored diagnostic trouble codes (DTCs) and their status

The use of the Diagnostic System Check will identify the correct procedure for diagnosing the system and where the procedure is located.

Diagnostic Instructions

1. Perform the «Diagnostic System Check - Vehicle (with HP2)»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__diagnostic-system-check-vehicle-with) or «Diagnostic System Check - Vehicle (without HP2)»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__diagnostic-system-check-vehicle-without) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Diagnostic Fault Information

Circuit/System Description

The body control module (BCM) monitors the control circuit of the wiper relay. The voltage level should be low while the wiper relay is de-energized and near system voltage when the relay is energized. After the BCM receives a low, intermittent, or mist signal from the wiper/washer switch, it responds by applying battery voltage through the wiper relay control circuit to the coil side of the relay, energizing the WIPER Relay. Ground is supplied at all times to the coil side of the WIPER relay.

Conditions for Running the DTC

This DTC can set only when the output is actively being requested by the BCM.

Conditions for Setting the DTC

If the BCM detects a short to ground in the WIPER 1 relay control circuit.

Action Taken When the DTC Sets

The BCM will not activate the output.

Conditions for Clearing the DTC

1. The current DTC will become history when the request for the output is removed or when the condition for setting the fault is corrected.
2. The 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

Description and Operation

Wiper/Washer System Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
2. «Connector Repairs»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

Ignition ON, wiper switch in LOW position. Verify the windshield wipers are cycling at the low speed.

Circuit/System Testing

1. Ignition OFF, disconnect the X5 harness connector at the BCM.
2. Ignition ON, verify that the low speed wipers are not on. If the low speed wipers are on, test the WIPER 1 relay control circuit terminal 20 for a short to voltage. If the circuit tests normal, replace the underhood fuse block.
3. Install a 10A fused jumper wire between the WIPER 1 relay control circuit terminal 20 and B+. Verify the low speed wipers are on. If the low speed wipers are not on, test the relay control circuit for an open/high resistance or short to ground. If the circuit tests normal replace the underhood fuse block.
4. If all circuits test normal, replace the BCM.

Repair Procedures

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «Underhood Electrical Center or Junction Block Replacement»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-introduction)
2. «Control Module References»(/chevrolet/avalanche/ii-2006-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for BCM replacement, setup, and programming

1. Perform the «Diagnostic System Check - Vehicle (with HP2)»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__diagnostic-system-check-vehicle-with) or «Diagnostic System Check - Vehicle (without HP2)»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__diagnostic-system-check-vehicle-without) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The windshield washer function is controlled by the body control module (BCM). When the washer switch is pressed, ground is applied through the switch contacts and the signal circuit to the BCM indicating the wash request. The BCM then applies ground through the control circuit to the coil side of the WSH Relay energizing the relay. With the relay energized, battery voltage from the WPR fuse is applied through the switch contacts of the relay, the WSW/PUMP Fuse, and the control circuit to the windshield washer fluid pump.

This DTC can set only when the output is actively being requested by the BCM.

This DTC sets if the BCM detects a short to voltage in the windshield washer pump relay control circuit.

The BCM will not activate the output.

1. The current DTC will become history when the request for the output is removed or when the condition for setting the fault is corrected.
2. The history DTC will clear after 50 consecutive ignition cycles without a fault present.

Schematic Reference

Wiper/Washer Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Wiper/Washer System Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
2. «Connector Repairs»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Operate the washers using the WASH switch. Verify the washer pump activates.

1. Ignition OFF, disconnect the X4 harness connector at the BCM.
2. Ignition ON, verify the windshield washer pump is not on. If the windshield washer pump is on, test the windshield washer pump relay control circuit terminal 15 for a short to ground. If the circuit tests normal replace the underhood fuse block.
3. Install a 10A fused jumper wire between the relay control circuit terminal 15 and ground. Verify the windshield washer pump is on. If the windshield washer pump is not on, test the relay control circuit for a short to voltage or an open/high resistance. If the circuit tests normal replace the underhood fuse block.
4. If all circuits test normal, replace the BCM.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «Underhood Electrical Center or Junction Block Replacement»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-introduction)
2. «Control Module References»(/chevrolet/avalanche/ii-2006-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for BCM replacement, setup, and programming

1. Perform the «Diagnostic System Check - Vehicle (with HP2)»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__diagnostic-system-check-vehicle-with) or «Diagnostic System Check - Vehicle (without HP2)»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__diagnostic-system-check-vehicle-without) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The body control module (BCM) monitors the wiper high speed relay control circuit only when wiper high speed mode is active. When the wiper high speed mode is requested, the BCM responds by applying a ground through the wiper high speed relay control circuit to the coil side of the relay, energizing the WPR HI Relay.

This DTC can set only when the output is actively being requested by the BCM.

This DTC sets if the BCM detects a short to voltage on the WIPER 2 relay control circuit.

The BCM will not activate the output.

1. The current DTC will become history when the request for the output is removed or when the condition for setting the fault is corrected.
2. The history DTC will clear after 50 consecutive ignition cycles without a fault present.

Schematic Reference

Wiper/Washer Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Wiper/Washer System Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
2. «Connector Repairs»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Ignition ON, wiper switch in the HIGH position. Verify the windshield wipers are cycling at the high speed.

1. Ignition OFF, disconnect the X5 harness connector at the BCM.
2. Install a 10A fused jumper wire between the WIPER 1 relay control circuit terminal 20 and B+.
3. Ignition ON, verify that the high speed wipers are not on. If the high speed wipers are on, test the WIPER 2 relay control circuit terminal 21 for a short to ground. If the circuit tests normal, replace the underhood fuse block.
4. Install a 10A fused jumper wire between the WIPER 2 relay control circuit terminal 21 and ground. Verify the high speed wipers are on. If the low speed wipers are not on, test the relay control circuit for a short to voltage or an open/high resistance. If the circuit tests normal replace the underhood fuse block.
5. If all circuits test normal, replace the BCM.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «Underhood Electrical Center or Junction Block Replacement»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-introduction)
2. «Control Module References»(/chevrolet/avalanche/ii-2006-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for BCM replacement, setup, and programming

1. Perform the «Diagnostic System Check - Vehicle (with HP2)»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__diagnostic-system-check-vehicle-with) or «Diagnostic System Check - Vehicle (without HP2)»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__diagnostic-system-check-vehicle-without) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The body control module (BCM) controls the wiper motor based on input from the windshield wiper washer switch. The BCM monitors the wiper washer switch through three separate signal circuits and a ground circuit. The windshield wiper switch high signal circuit is used to determine high speed wiper operation, the windshield wiper switch low signal is used to determine low speed, intermittent, and mist operation through the use of a resistor ladder, and windshield washer switch signal circuit is used to determine washer operation.

The ignition switch is in the ON position.

The BCM detects a short to ground on the windshield wiper switch low signal circuit.

1. The BCM will not activate the low speed output.
2. The windshield wipers will only operate in the high speed mode.

1. The DTC will clear the current status when the condition for setting the fault is corrected.
2. A history DTC will clear after 50 consecutive ignition cycles without a fault present.

Schematic Reference

Wiper/Washer Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Wiper/Washer System Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
2. «Connector Repairs»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Ignition ON, observe the scan tool Windshield Wiper Switch parameter while rotating the wiper switch. The reading should change between Off, Intermittent, and Low.

1. Ignition OFF, disconnect the X3 harness connector at the turn signal multifunction switch.
2. Ignition ON, verify the scan tool Windshield Wiper Switch parameter is OFF. If not the specified value, test the signal circuit terminal N for a short to ground. If the circuit tests normal, replace the BCM.
3. If all circuits test normal, test or replace the turn signal multifunction switch.

Component Testing

Turn Signal Multifunction Switch

1. Ignition OFF, disconnect the X1 harness connector at the turn signal multifunction switch.
2. With the wiper switch in the HIGH position, test for less than 2 ohms between the low reference terminal M and the signal terminal K. If greater than the specified range, replace the windshield wiper washer switch.
3. While cycling the wiper switch through each delay and speed position, test for the specified resistance between the low reference terminal M and the signal terminal N.

Wiper Switch Values

1. If any switch position is not within the specified range, replace the turn signal multifunction switch.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «Turn Signal Multifunction Switch Replacement»(/chevrolet/avalanche/ii-2006-2013/remont/steering-column-switches/#steering-wheel-steering-column)
2. «Control Module References»(/chevrolet/avalanche/ii-2006-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for BCM replacement, setup, and programming

Symptoms - Wiper/Washer Systems

1. Perform «Diagnostic System Check - Vehicle (with HP2)»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__diagnostic-system-check-vehicle-with) or «Diagnostic System Check - Vehicle (without HP2)»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__diagnostic-system-check-vehicle-without) , 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 the system description and operation in order to familiarize yourself with the system functions: «Wiper/Washer System Description and Operation»(/chevrolet/avalanche/ii-2006-2013/remont/wiperwasher-systems/#wiper-system-washer-system) «Rear Wiper/Washer System Description and Operation»(/chevrolet/avalanche/ii-2006-2013/remont/wiperwasher-systems/#wiper-system-washer-system__rear-wiperwasher-system-description-and-operation)

Visual/Physical Inspection

1. Inspect for aftermarket devices which could affect the operation of the Windshield Wiper/Washer System. Refer to «Checking Aftermarket Accessories»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__checking-aftermarket-accessories) .
2. Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.
3. 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

1. «Windshield Wiper Washer System Malfunction»(/chevrolet/avalanche/ii-2006-2013/remont/wiperwasher-systems/#wiper-system-washer-system)
2. «Windshield Wiper System Malfunction»(/chevrolet/avalanche/ii-2006-2013/remont/wiperwasher-systems/#wiper-system-washer-system)
3. «Low Washer Fluid Indicator Malfunction»(/chevrolet/avalanche/ii-2006-2013/remont/wiperwasher-systems/#wiper-system-washer-system)
4. «Windshield Washer Solvent Heater Malfunction»(/chevrolet/avalanche/ii-2006-2013/remont/wiperwasher-systems/#wiper-system-washer-system)
5. «Moisture Sensing Feature Inoperative»(/chevrolet/avalanche/ii-2006-2013/remont/wiperwasher-systems/#wiper-system-washer-system)
6. «Rear Wiper System Malfunction»(/chevrolet/avalanche/ii-2006-2013/remont/wiperwasher-systems/#wiper-system-washer-system)
7. «Rear Wiper Washer System Malfunction»(/chevrolet/avalanche/ii-2006-2013/remont/wiperwasher-systems/#wiper-system-washer-system)

1. Perform the «Diagnostic System Check - Vehicle (with HP2)»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__diagnostic-system-check-vehicle-with) or «Diagnostic System Check - Vehicle (without HP2)»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__diagnostic-system-check-vehicle-without) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The windshield washer function is controlled by the body control module (BCM). When the washer switch is pressed, ground is applied through the switch contacts and the signal circuit to the BCM indicating the wash request. The BCM then applies ground through the control circuit to the coil side of the FRT WASH relay energizing the relay. With the relay energized, battery voltage is applied through the switch contacts of the relay, the FRT WASH fuse and the control circuit to the windshield washer fluid pump.

Schematic Reference

Wiper/Washer Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Wiper/Washer System Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
2. «Connector Repairs»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

1. Ignition ON, observe the scan tool Windshield Washer Switch parameter while pressing and releasing the washer switch. The reading should change between Active and Inactive. If the reading does not change between the specified values, refer to the Windshield Washer Switch Circuit Test.
2. Connect a test lamp between the relay side of the FRT WASH fuse and ground.
3. Ignition ON, verify that the test lamp turns ON and OFF while pressing and releasing the windshield washer switch. If the test lamp does not turn ON and OFF while changing between the commanded states, refer to the Windshield Washer Pump Relay Control Circuit Test.
4. If the washer pump does not operate, refer to the Windshield Washer Pump Circuit Test.

Windshield Washer Switch Circuit Test

1. Ignition OFF, disconnect the X3 harness connector at the turn signal multifunction switch.
2. Test for less than 20 ohms between the low reference circuit terminal M and ground. If greater than the specified range, test the low reference circuit for an open/high resistance.
3. Ignition ON, verify the scan tool Windshield Washer Switch parameter is Inactive. If not the specified value, test the signal circuit terminal L for a short to ground. If the circuit tests normal, replace the BCM.
4. Install a 3A fused jumper wire between the signal circuit terminal L and the low reference circuit terminal M. Verify the scan tool Windshield Washer Switch parameter is Active. If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the BCM.
5. If all circuits test normal, test or replace the turn signal multifunction switch.

Windshield Washer Pump Relay Control Circuit Test

1. Ignition OFF, disconnect the X4 harness connector at the BCM.
2. Ignition ON, verify the windshield washer pump is not on. If the windshield washer pump is on, test the windshield washer pump relay control circuit terminal 15 for a short to ground. If the circuit tests normal replace the underhood fuse block.
3. Install a 10A fused jumper wire between the relay control circuit terminal 15 and ground. Verify the windshield washer pump is on. If the windshield washer pump is not on, test the relay control circuit for a short to voltage or an open/high resistance. If the circuit tests normal replace the underhood fuse block.
4. If all circuits test normal, replace the BCM.

Windshield Washer Pump Circuit Test

1. Ignition OFF, disconnect the harness connector at the windshield washer pump.
2. Test for less than 1.0 ohm between the ground circuit terminal B and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
3. Connect a test lamp between the control circuit terminal A and the ground circuit terminal B.
4. Command the Wiper Washer Motor ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states. If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the underhood fuse block. If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the underhood fuse block.
5. If all circuits test normal, test or replace the windshield washer pump.

Turn Signal Multifunction Switch

1. Ignition OFF, disconnect the X1 harness connector at the turn signal multifunction switch.
2. With the wiper switch in the HIGH position, test for less than 2 ohms between the low reference terminal M and the signal terminal K. If greater than the specified range, replace the windshield wiper washer switch.
3. While cycling the wiper switch through each delay and speed position, test for the specified resistance between the low reference terminal M and the signal terminal N.

Wiper Switch Values

1. If any switch position is not within the specified range, replace the turn signal multifunction switch.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «Turn Signal Multifunction Switch Replacement»(/chevrolet/avalanche/ii-2006-2013/remont/steering-column-switches/#steering-wheel-steering-column)
2. «Windshield Washer Pump Replacement»(/chevrolet/avalanche/ii-2006-2013/remont/wiperwasher-systems/#wiper-system-washer-system)
3. «Underhood Electrical Center or Junction Block Replacement»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-introduction)
4. «Control Module References»(/chevrolet/avalanche/ii-2006-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for BCM replacement, setup, and programming

1. Perform the «Diagnostic System Check - Vehicle (with HP2)»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__diagnostic-system-check-vehicle-with) or «Diagnostic System Check - Vehicle (without HP2)»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__diagnostic-system-check-vehicle-without) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The body control module (BCM) controls the wiper motor based on input from the windshield wiper washer switch. The BCM monitors the wiper washer switch through three separate signal circuits and a ground circuit. The windshield wiper switch high signal circuit is used to determine high speed wiper operation, the windshield wiper switch low signal is used to determine low speed, intermittent, and mist operation through the use of a resistor ladder, and windshield washer switch signal circuit is used to determine washer operation.

The BCM controls the windshield wiper motor through two output controls, controlling two relays which determine the desired wiper speed, high or low.

Schematic Reference

Wiper/Washer Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Wiper/Washer System Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
2. «Connector Repairs»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

1. Observe the scan tool Windshield Wiper Switch parameter while rotating the wiper switch. The reading should change between Off, Intermittent, Low, and High. If the Windshield Wiper Switch parameter is incorrect in the Low or High switch positions, refer to the Multifunction Switch Circuit Test and/or the Turn Signal Multifunction Switch Component Test.
2. Observe the scan tool BCM Wiper Park Switch parameter. The reading should display Active when the wipers are parked and Inactive with the wipers ON or out of the park position. If the Wiper Park Switch parameter is always Active or Inactive, refer to Wipers do not Park Circuit Test.
3. Connect a test lamp between the TP 1 terminal in the underhood fuse block and ground.
4. Verify the test lamp turns on and off while turning the windshield wiper switch between LOW and OFF. If the test lamp does not turn on and off while changing between the commanded states, refer to WIPER 1 Relay Control Circuit Test.
5. Ignition ON, operate the windshield wiper switch through the Delay, Low, and High positions. If the windshield wipers are inoperative in 1 or more of the delay settings only, test or replace the turn signal multifunction switch. If the windshield wipers operate at high speed while the switch is in the Low position, refer to WIPER 2 Relay Control Circuit Test. If the windshield wipers operate at low speed while the switch is in the High position, refer to WIPER 2 Relay Control Circuit Test. If the windshield wipers are inoperative in the Low or High switch positions, refer to Wiper Motor Circuit Test and/or the Wiper Motor Component Test.

Multifunction Switch Circuit Test

1. Ignition OFF, disconnect the X3 harness connector at the turn signal multifunction switch.
2. Ignition OFF, test for less than 20 ohms between the low reference circuit terminal M and ground. If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the BCM.
3. Verify the scan tool Windshield Wiper Switch parameter is Off. If not the specified value, test the signal circuit terminal N for a short to ground. If the circuit tests normal, replace the BCM.
4. Verify the scan tool Wiper High Speed Switch parameter is Inactive. If not the specified value, test the signal circuit terminal K for a short to ground. If the circuit tests normal, replace the BCM.
5. Install a 3-amp fused jumper wire between the signal circuit terminal N and ground. Verify the scan tool Windshield Wiper Switch parameter is Switch Fault. If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the BCM.
6. Install a 3-amp fused jumper wire between the signal circuit terminal K and ground. Verify the scan tool Wiper High Speed Switch parameter is Active. If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the BCM.
7. If all circuits test normal, replace the turn signal/multifunction switch.

Wipers Do Not Park Circuit Test

1. Ignition OFF, disconnect the harness connector at the windshield wiper motor.
2. Ignition ON, verify the scan tool BCM Wiper Park Switch parameter is Inactive. If not the specified value, test the signal circuit terminal 3 for a short to ground. If the circuit tests normal, replace the BCM.
3. Install a 3-amp fused jumper wire between the signal circuit terminal 3 and ground. Verify the scan tool Wiper Park Switch parameter is Active. If not the specified value, test the signal circuit for an open/high resistance. If the circuit tests normal, replace the BCM.
4. If all circuits test normal, replace the windshield wiper motor.

WIPER 1 Relay Control Circuit Test

1. Ignition OFF, disconnect the X5 harness connector at the BCM.
2. Ignition ON, verify that the low speed wipers are not on. If the low speed wipers are on, test the relay control circuit terminal 20 for a short to voltage. If the circuit tests normal, replace the underhood fuse block.
3. Install a 10A fused jumper wire between the relay control circuit terminal 20 and B+. Verify the low speed wipers are on. If the low speed wipers are not on, test the relay control circuit for an open/high resistance or short to ground. If the circuit tests normal replace the underhood fuse block.
4. If all circuits test normal, replace the BCM.

WIPER 2 Relay Control Circuit Test

1. Ignition OFF, disconnect the X5 harness connector at the BCM.
2. Install a 10A fused jumper wire between B+ and the WIPER 1 relay control circuit terminal 20.
3. Ignition ON, verify that the high speed wipers are not on. If the high speed wipers are on, test the WIPER 2 relay control circuit terminal 21 for a short to ground. If the circuit tests normal, replace the underhood fuse block.
4. Install a 10A fused jumper wire between the WIPER 2 relay control circuit terminal 21 and ground. Verify the high speed wipers are on. If the high speed wipers are not on, test the relay control circuit for an open/high resistance or short to voltage. If the circuit tests normal replace the underhood fuse block.
5. If all circuits test normal, replace the BCM.

Wiper Motor Circuit Test

1. Disconnect the harness connector at the windshield wiper motor.
2. Test for less that 1 ohm between the wiper motor ground circuit terminal 5 and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
3. Connect a test lamp between the low speed motor control circuit terminal 1 and ground.
4. Ignition on, command the Wiper Relay ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states. If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the underhood fuse block. If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the underhood fuse block.
5. Connect a test lamp between the high speed motor control circuit terminal 4 and ground.
6. Wiper switch in the LOW position, command the Wiper High Speed Relay ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states. If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the underhood fuse block. If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the underhood fuse block.
7. If all circuits test normal, replace the windshield wiper motor.

Turn Signal Multifunction Switch

1. Ignition OFF, disconnect the X1 harness connector at the turn signal multifunction switch.
2. With the wiper switch in the HIGH position, test for less than 2 ohms between the low reference terminal M and the signal terminal K. If greater than the specified range, replace the windshield wiper washer switch.
3. While cycling the wiper switch through each delay and speed position, test for the specified resistance between the low reference terminal M and the signal terminal N.

Wiper Switch Values

Windshield Wiper Motor Dynamic Test

1. Ignition OFF, disconnect the harness connector at the windshield wiper motor.
2. Install a 25-amp fused jumper wire between B+ and the control terminal 1. Install a jumper wire between the terminal 5 and ground.
3. The wiper motor should be in low speed mode. If the wiper motor is not in the low speed mode replace the motor.
4. Install a 25-amp fused jumper wire between the control terminal 4 and 12 volts. Install a jumper wire between the terminal 5 and ground.
5. The wiper motor should be in the high speed mode. If the wiper motor is not in the high speed mode replace the motor.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «Turn Signal Multifunction Switch Replacement»(/chevrolet/avalanche/ii-2006-2013/remont/steering-column-switches/#steering-wheel-steering-column)
2. «Windshield Wiper System Module Replacement»(/chevrolet/avalanche/ii-2006-2013/remont/wiperwasher-systems/#wiper-system-washer-system)
3. «Underhood Electrical Center or Junction Block Replacement»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-introduction)
4. «Control Module References»(/chevrolet/avalanche/ii-2006-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for BCM replacement, setup, and programming

1. Perform the «Diagnostic System Check - Vehicle (with HP2)»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__diagnostic-system-check-vehicle-with) or «Diagnostic System Check - Vehicle (without HP2)»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__diagnostic-system-check-vehicle-without) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The Check Washer Fluid message is controlled by the instrument panel cluster (IPC) using an input from the washer fluid level switch. The washer fluid level signal circuit is supplied ignition voltage through a resistor then monitored within the instrument cluster. The washer fluid level switch is normally open so the instrument cluster detects ignition voltage on the washer fluid level signal circuit whenever the washer fluid level is not low. When the washer fluid reaches the point where the driver should be informed that the washer fluid is low, the washer fluid level switch closes. When the washer fluid level switch is closed the washer fluid level signal circuit voltage is pulled low, and the instrument panel displays the Check Washer Fluid message on the driver information center. In order to prevent the Check Washer Fluid message from being displayed while sloshing is occurring in the washer fluid container, the instrument cluster is programed with a delay before changing states of the Check Washer Fluid message during an ignition cycle.

Schematic Reference

Instrument Cluster Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Wiper/Washer System Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
2. «Connector Repairs»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

1. Ignition OFF, disconnect the harness connector at the washer fluid level switch.
2. Test for less than 1.0 ohm between the ground circuit terminal B and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
3. Ignition ON, verify the scan tool Washer Fluid Level parameter is OK. If not the specified value, test the signal circuit terminal A for a short to ground. If the circuit tests normal, replace the IPC.
4. Install a 3A fused jumper wire between the signal circuit terminal A and ground. Verify the scan tool Washer Fluid Level parameter is Low. If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the IPC.
5. If all circuits test normal, test or replace the washer fluid level switch.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «Windshield Washer Solvent Level Indicator Replacement»(/chevrolet/avalanche/ii-2006-2013/remont/wiperwasher-systems/#wiper-system-washer-system)
2. «Control Module References»(/chevrolet/avalanche/ii-2006-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for IPC replacement, setup, and programming

1. Perform the «Diagnostic System Check - Vehicle (with HP2)»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__diagnostic-system-check-vehicle-with) or «Diagnostic System Check - Vehicle (without HP2)»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__diagnostic-system-check-vehicle-without) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The windshield washer solvent heater operates with the standard windshield wiper washer system, and when a heated washer cycle is activated the solvent heater controls the windshield washers through the washer switch signal circuit to the body control module (BCM). The heater is supplied with high current power and ground circuits that are used to energize the heater coils. The low current logic voltage is supplied to the heater through the RUN relay in the underhood fuse block. The RUN relay is a PCB relay energized by the BCM only while the engine is running. The heated washer cycle operation is activated by a separate switch located on the instrument panel accessory switch assembly. When the heated washer fluid switch is pressed the heated washer switch signal circuit is momentarily grounded and the heated washer cycle is activated. During the heated wash cycle the 3 heater elements in the solvent heater are energized, and when the solvent temperature reaches approximately 70°C (160°F) the heater grounds the washer switch signal circuit until the heated solvent is dispensed. The heated washer cycle will run 4 heat and wash actions unless deactivated by the heated washer switch signal.

Schematic Reference

Wiper/Washer Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Wiper/Washer System Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
2. «Connector Repairs»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

1. Ignition ON, verify the washers operate using the washer switch. If the base washer system does not operate, refer to «Windshield Wiper Washer System Malfunction»(/chevrolet/avalanche/ii-2006-2013/remont/wiperwasher-systems/#wiper-system-washer-system) .
2. Depress the heated washer switch. The heater washer fluid system should begin to cycle and the driver information center (DIC) should displays the heated washer fluid pending message. If the heated washer fluid system does not begin to cycle, refer to Windshield Washer Solvent Heater Malfunction. If the DIC does not display the heated washer fluid pending message, refer to Heated Washer Fluid Indicator Malfunction.

Windshield Washer Solvent Heater Malfunction

1. Ignition OFF, disconnect the X1 harness connector at the windshield washer solvent heater.
2. Test for less than 5 ohms between the ground circuit terminal 2 and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
3. Ignition ON, verify that a test lamp illuminates between the B+ circuit terminal 1 and ground. If the test lamp does not illuminate, test the B+ voltage circuit for an open/high resistance. If the circuit fuse is open, test the B+ circuit for a short to ground. If the circuit test normal, replace the windshield washer solvent heater.
4. Ignition OFF, connect the X1 harness connector at the windshield washer solvent heater. Disconnect the X2 harness connector at the windshield washer solvent heater.
5. Test for less than 5 ohms between the ground circuit terminal 4 and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
6. Ignition ON, verify that a test lamp illuminates between the ignition circuit terminal 6 and ground. If the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance. If the circuit tests normal, refer to «Power Mode Mismatch»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis) .
7. Verify the scan tool Windshield Washer Switch parameter displays Inactive. If not the specified value, test the signal circuit terminal 5 for a short to ground. If the circuit tests normal, refer to «Windshield Wiper Washer System Malfunction»(/chevrolet/avalanche/ii-2006-2013/remont/wiperwasher-systems/#wiper-system-washer-system) .
8. Install a 3A fused jumper wire between the signal circuit terminal 5 and ground. Verify the scan tool Windshield Washer Switch parameter displays Active. If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, refer to «Windshield Wiper Washer System Malfunction»(/chevrolet/avalanche/ii-2006-2013/remont/wiperwasher-systems/#wiper-system-washer-system) .
9. Ignition OFF, connect a test lamp between the signal circuit terminal 1 and B+.
10. Command the heated washer system ON and OFF using the heated washer switch. The test lamp should turn ON and OFF when changing between the commanded states. If the test lamp is always ON, test the signal circuit for a short to ground. If the circuit tests normal, test or replace the headlamp switch. If the test lamp is always OFF, test the signal circuit for a short to voltage or and open/high resistance. If the circuit tests normal, test or replace the headlamp switch.
11. If all circuits test normal, test or replace the windshield washer solvent heater.

Heated Washer Fluid Indicator Malfunction

1. Ignition OFF, disconnect the X2 harness connector at the windshield washer solvent heater.
2. Verify the heated washer fluid pending message is not displayed on the DIC. If the message is displayed, test the signal circuit terminal 2 for a short to ground. If the circuit tests normal, replace the IPC.
3. Ignition ON, install a 3A fused jumper wire between the signal circuit terminal 2 and ground. Verify the heated washer fluid pending message is displayed on the DIC. If the message is not displayed, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the IPC.
4. If all circuits test normal, test or replace the windshield washer solvent heater.

Heated Washer Fluid Switch

1. Ignition OFF, disconnect the harness connector at the instrument panel accessory switch assembly.
2. Test for infinite resistance between the switch signal circuit terminal and the ground circuit terminal with the switch in the open position. If less than infinite, replace the accessory switch assembly.
3. Test for less than 3 ohms between the switch signal circuit terminal and the ground circuit terminal with the switch in the closed position. If greater than 3 ohms, replace the accessory switch assembly.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «Accessory Switch Replacement (Except Cadillac)»(/chevrolet/avalanche/ii-2006-2013/remont/gauges-instrument-panels/#instrument-panel-system-displays-gauges) or «Accessory Switch Replacement (Cadillac)»(/chevrolet/avalanche/ii-2006-2013/remont/gauges-instrument-panels/#instrument-panel-system-displays-gauges)
2. «Windshield Washer Solvent Heater Replacement»(/chevrolet/avalanche/ii-2006-2013/remont/wiperwasher-systems/#wiper-system-washer-system)

1. Perform the «Diagnostic System Check - Vehicle (with HP2)»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__diagnostic-system-check-vehicle-with) or «Diagnostic System Check - Vehicle (without HP2)»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__diagnostic-system-check-vehicle-without) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Ignition voltage is supplied to the outside moisture sensor from the body control module (BCM). Whenever the ignition is in the run or accessory positions, the BCM sends the wiper/washer switch status using a pulse width modulated (PWM) signal through the outside moisture sensor signal 1 circuit to the outside moisture sensor. When a wipe cycle is needed, the moisture sensor sends a PWM voltage signal through the moisture sensor signal 2 circuit back to the BCM requesting the wiper operation.

The outside moisture sensor uses the moisture sensor signal 2 circuit to command wiper motor wipe cycles and to confirm the moisture sensor signal 1 is being received. If at anytime a fault occurs between the outside moisture sensor and BCM, the BCM will use the inputs from the windshield wiper/washer switch in the delay positions to operate the wiper motor at continuous variable delay intervals.

Diagnostic Aids

Inspect the silicon gel linking the sensor to the windshield for any distortion, or blockage of the sensor lens.

Schematic Reference

Wiper/Washer Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Wiper/Washer System Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
2. «Connector Repairs»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Ignition ON, wiper switch in the low position. The windshield wipers should operate at low speed. If the windshield wipers do not operate, refer to Windshield Wiper System Malfunction .

1. Ignition OFF, disconnect the harness connector at the outside moisture sensor.
2. Test for less than 5.0 ohms between the ground circuit terminal 3 and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
3. Ignition ON, verify that a test lamp illuminates between ignition circuit terminal 4 and ground. If the test does not illuminate, test the ignition circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the BCM.
4. Ignition OFF, connect the harness connector at the outside moisture sensor.
5. Disconnect the X4 harness connector at the BCM.
6. Ignition ON, test for 8-10 volts between the signal circuit terminal 18 and ground. If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the outside moisture sensor. If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the outside moisture sensor.
7. Ignition ON, test for 4-8.5 volts between the signal circuit terminal 14 and ground. If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the outside moisture sensor. If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the outside moisture sensor.
8. If all circuits test normal, replace the BCM.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «Windshield Outside Moisture Sensor Replacement»(/chevrolet/avalanche/ii-2006-2013/remont/wiperwasher-systems/#wiper-system-washer-system)
2. «Control Module References»(/chevrolet/avalanche/ii-2006-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for BCM replacement, setup, and programming

1. Perform the «Diagnostic System Check - Vehicle (with HP2)»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__diagnostic-system-check-vehicle-with) or «Diagnostic System Check - Vehicle (without HP2)»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__diagnostic-system-check-vehicle-without) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The rear wiper is controlled based on an input from the rear wiper/washer portion of the multifunction switch. When the switch is in the ON or DELAY, a voltage signal is sent to the rear window wiper motor indicating the desired speed. Each switch position has resistor that drops the voltage to a specified value which is interpreted by the rear window wiper motor as ON or DELAY.

Schematic Reference

Wiper/Washer Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Rear Wiper/Washer System Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
2. «Connector Repairs»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

1. Ignition ON, observe the scan tool BCM Rear Closure Ajar Sw. parameter while opening and closing the liftgate and liftgate window. The reading should change between Active and Inactive. If not the specified values refer to «Liftgate/Liftgate Window Ajar Indicator Malfunction (Manual Liftgate)»(/chevrolet/avalanche/ii-2006-2013/remont/door-locks-anti-theft-systems/#door-lock-system-door-handles) or «Liftgate/Liftgate Window Ajar Indicator Malfunction (Power Liftgate)»(/chevrolet/avalanche/ii-2006-2013/remont/door-locks-anti-theft-systems/#door-lock-system-door-handles) .
2. Press and release the rear window washer switch. The rear window wiper motor and pump will operate continuously for as long as the wash switch is pressed and several wipe cycles will occur after the switch is released. If the rear wiper motor and the rear washer pump are inoperative, refer to the Rear Wiper Washer Switch Circuit Test. If the rear washer pump operates normal and the rear wiper motor is inoperative, refer to the Rear Wiper Motor Circuit Test.
3. Operate the rear window wiper switch to DELAY, ON, and OFF. The rear window wiper motor will operate in a delayed wipe cycle mode then a continuous wipe cycle mode and stop in the park position. If the wiper motor is inoperative in the DELAY or ON modes, refer to the Rear Wiper Motor Circuit Test. If the rear wiper stops out of the park position, replace the rear window wiper motor.

Rear Wiper Washer Switch Circuit Test

1. Ignition OFF, disconnect the harness connector X4 at the turn signal multifunction switch.
2. Ignition On, verify that a test lamp illuminates between the ignition circuit terminal 1 and ground. If the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance. If the circuit tests normal, refer to «Power Mode Mismatch»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis) .
3. If all circuits test normal replace the turn signal multifunction switch.

Rear Wiper Motor Circuit Test

1. Ignition OFF, disconnect the harness connector at the rear window wiper motor.
2. Test for less than 1.0 ohm between the ground circuit terminal D and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
3. Verify that a test lamp illuminates between the B+ circuit terminal E and ground. If the test lamp does not illuminate, test the B+ circuit for an open/high resistance or short to ground.
4. Ignition ON, test for B+ at the signal circuit terminal A while the rear window wiper switch is in the delay and on switch positions. If B+ is not present, test the signal circuit for an open/high resistance or short to ground. If the circuit tests normal replace the turn signal multifunction switch.
5. If all circuits test normal replace the rear window wiper motor.

Rear Window Wiper Switch

1. Ignition OFF, disconnect the X4 harness connector at the turn signal multifunction switch.
2. Rear wiper switch OFF, test for infinite resistance between the ignition terminal 1 and the signal terminal 2. If not the specified value, replace the turn signal multifunction switch.
3. Rear wiper switch in the ON position, test for 2000-2400 ohms between the ignition terminal 1 and the signal terminal 2. If not within the specified range, replace the turn signal multifunction switch.
4. With the rear wiper switch in the DELAY position, test for 900-1.5K ohms between the ignition terminal 1 and the signal terminal 2. If not within the specified range, replace the turn signal multifunction switch.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «Rear Window Wiper and Washer Switch Replacement»(/chevrolet/avalanche/ii-2006-2013/remont/wiperwasher-systems/#wiper-system-washer-system__rear-window-wiper-and-washer-switch)
2. «Rear Window Wiper Motor Replacement»(/chevrolet/avalanche/ii-2006-2013/remont/wiperwasher-systems/#wiper-system-washer-system)

1. Perform the «Diagnostic System Check - Vehicle (with HP2)»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__diagnostic-system-check-vehicle-with) or «Diagnostic System Check - Vehicle (without HP2)»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__diagnostic-system-check-vehicle-without) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/chevrolet/avalanche/ii-2006-2013/remont/oem-general-information/#vehicle-diagnostic-information-2-of-2__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The rear window washer pump is controlled by the rear window wiper washer switch through the rear washer pump relay. The ignition voltage is from the body control module (BCM), and when the WASH switch is pressed B+ is applied to the rear washer relay control circuit and to the rear wiper switch signal circuit. When the rear wiper motor module receives B+ on the rear wiper switch signal circuit, the wiper motor will operate continuously for as long as the voltage is present and several cycles after the switch is released. The rear washer relay control circuit is used to energize the relay coil and close the rear washer pump control circuit to B+.

Schematic Reference

Wiper/Washer Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Rear Wiper/Washer System Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
2. «Connector Repairs»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

1. Ignition ON, verify the rear wiper operates normally using the rear wiper switch. If the rear wiper does not operate properly, refer to «Rear Wiper System Malfunction»(/chevrolet/avalanche/ii-2006-2013/remont/wiperwasher-systems/#wiper-system-washer-system) .
2. Connect a test lamp between the relay side of the REAR WASH fuse and ground.
3. Verify that the test lamp turns on and off while pressing and releasing the rear window washer switch. If the test lamp does not turn on and off while changing between the commanded states, refer to the Rear Washer Pump Relay Control Circuit Test.
4. If the rear washer pump does not operate properly, refer to the Rear Washer Pump Circuit Test.

Rear Washer Pump Relay Control Circuit Test

1. Disconnect the X4 harness connector at the turn signal multifunction switch.
2. Ignition ON, verify the rear washer pump is not on. If the rear washer pump is on, test the control circuit terminal 3 for a short to voltage. If the circuit tests normal, refer to the Rear Washer Pump Circuit Test.
3. Install a 15A fused jumper wire between B+ and the control circuit terminal 3. Verify the rear washer pump is on. If the rear washer pump is not on, test the control circuit for an open/high resistance or short to ground. If the circuit tests normal replace the underhood fuse block.
4. If all circuits test normal, test or replace the turn signal multifunction switch.

Rear Washer Pump Circuit Test

1. Ignition OFF, disconnect the harness connector at the rear washer pump.
2. Test for less than 1.0 ohm between the ground circuit terminal B and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
3. Connect a test lamp between the control circuit terminal A and the ground circuit terminal B.
4. Press and release the rear window washer switch. The test lamp should turn ON and OFF when changing between the commanded states. If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the underhood fuse block. If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the underhood fuse block.
5. If all circuits test normal, test or replace the rear washer pump.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «Rear Window Wiper and Washer Switch Replacement»(/chevrolet/avalanche/ii-2006-2013/remont/wiperwasher-systems/#wiper-system-washer-system__rear-window-wiper-and-washer-switch)
2. «Rear Window Washer Pump Replacement»(/chevrolet/avalanche/ii-2006-2013/remont/wiperwasher-systems/#wiper-system-washer-system)
3. «Underhood Electrical Center or Junction Block Replacement»(/chevrolet/avalanche/ii-2006-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-introduction)

Scheme 5

Rear Window Wiper and Washer Switch Replacement

Scheme 6

Removal Procedure

1. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/chevrolet/avalanche/ii-2006-2013/remont/hoistjack/#general-information) .
2. Remove the left front wheel assembly. Refer to «Tire and Wheel Removal and Installation»(/chevrolet/avalanche/ii-2006-2013/remont/wheel-tire-system/#tires-wheels__tire-and-wheel-removal-and-installation) .
3. Remove the left front wheelhouse liner. Refer to «Front Wheelhouse Liner Replacement - Left Side»(/chevrolet/avalanche/ii-2006-2013/remont/frames-subframes-crossmembers/#frame-and-underbody__front-wheelhouse-liner-replacement-left) .
4. Disconnect the washer pump hoses (1, 2) from the left side fender flange. Refer to «Windshield Washer Hose Replacement»(/chevrolet/avalanche/ii-2006-2013/remont/wiperwasher-systems/#wiper-system-washer-system) .
5. Drain the windshield washer solvent into a suitable container.
6. Disconnect the electrical connectors.
7. Lower the vehicle in order to access the hood latch.
8. Open the hood.
9. Remove the windshield washer solvent cap.
10. Remove the auxiliary battery tray, if equipped. Refer to «Battery Tray Replacement»(/chevrolet/avalanche/ii-2006-2013/remont/charging-system/#battery-charging-system-and-starting-system) .
11. Remove the upper windshield washer container bolt from under the auxiliary battery tray, if equipped.
12. Remove the upper windshield washer solvent container bolts.
13. Remove the windshield washer solvent container assembly (2).

Installation Procedure

1. Transfer washer pumps and level indicator to the new washer solvent container.
2. Install the windshield washer container assembly.
3. Install the upper windshield washer container bolt to the auxiliary battery tray, if equipped.
4. Install the upper windshield washer solvent container bolts and tighten to 9 N.m (80 lb in).
5. Install the auxiliary battery tray, if equipped. Refer to «Battery Tray Replacement»(/chevrolet/avalanche/ii-2006-2013/remont/charging-system/#battery-charging-system-and-starting-system) .
6. Install the windshield washer solvent cap.
7. Connect the electrical connectors.
8. Connect the washer pump hoses (1, 2). Refer to «Windshield Washer Hose Replacement»(/chevrolet/avalanche/ii-2006-2013/remont/wiperwasher-systems/#wiper-system-washer-system) .
9. Install the left front wheelhouse liner. Refer to «Front Wheelhouse Liner Replacement - Left Side»(/chevrolet/avalanche/ii-2006-2013/remont/frames-subframes-crossmembers/#frame-and-underbody__front-wheelhouse-liner-replacement-left) .
10. Install the left front wheel assembly. Refer to «Tire and Wheel Removal and Installation»(/chevrolet/avalanche/ii-2006-2013/remont/wheel-tire-system/#tires-wheels__tire-and-wheel-removal-and-installation) .
11. Fill the washer solvent container with windshield solvent. Refer to «Fluid and Lubricant Recommendations»(/chevrolet/avalanche/ii-2006-2013/remont/lubrication-system/#maintenance-and-lubrication__fluid-and-lubricant-recommendations) .

Scheme 7

Scheme 8

Scheme 9

Scheme 10

Scheme 11

Scheme 12

Scheme 13

Scheme 14

Scheme 15

Scheme 16

Scheme 17

Scheme 18

Scheme 19

Scheme 20

Scheme 21

Windshield Glass Cleaning

Clean the windshield glass with windshield cleaner. The cleaner used should be one that will not harm the paint finish or scratch the glass. The windshield glass is clean when water no longer beads, but sheets across the entire glass surface.

Wiper Blade Element Cleaning

1. Lift the wiper blade assemblies off of the windshield glass.
2. Clean the wiper blade element with a clean cloth saturated with full strength washer solution.
3. Rinse the wiper blade assemblies with water.
4. Place the wiper blade assemblies back onto the windshield glass.

Wiper Chatter Repair

Some vehicles may exhibit a condition where the windshield wiper blades chatter or wipe unevenly. Several different conditions can cause the wiper blade chatter. To completely repair wiper blade chatter, all of the following should be checked and repaired as necessary

1. The windshield glass must be clean.
2. The wiper blade element must be clean.
3. The wiper arm tip pressure must be within specifications.
4. The wiper blade element set must be within specifications.

Windshield Wipers

The windshield wiper/washer switch signal circuits are inputs to the body control module (BCM) and the BCM controls wiper motor low speed operation, washer pump and high speed operation. The windshield wiper/washer switch is provided a low reference from the BCM and each of the switch signal circuits is supplied 12 volts through a resistor and monitored within the BCM. During LOW or INTERMITTENT operation the wiper switch low signal circuit is closed to the low reference circuit through a series of resistors within the switch assembly and the signal circuit voltage monitored by the BCM will depend on the switch contact location to the resistor assembly. During HIGH or WASH operation the high and wash switch signal circuits are closed directly to the low reference circuit within the switch assembly and nearly all the signal circuit voltage will be dropped across the BCM resistors. The BCM controls the wiper motor through the Wiper Relay and the Wiper High Relay. During any wiper motor function that uses low speed the BCM supplies the voltage to energize the Wiper Relay and battery voltage will be supplied from the Wiper Relay through the de-energized Wiper High Relay to the wiper motor low speed control circuit. During high speed wiper motor operation the Wiper Relay is energized as in low speed and the BCM provides a ground to energize the Wiper High Relay and the battery voltage is supplied to the wiper motor high speed control circuit. Wiper motor park operation is controlled by the BCM using an input from the park switch within the wiper motor assembly. The BCM supplies the park switch signal circuit 12 volts through a resistor then monitors the circuit. Whenever the wiper motor is out of the park position the park switch signal circuit is closed to ground and nearly all the signal circuit voltage will be dropped across the BCM resistor. When the wiper switch is turned to the OFF position while the wiper motor is somewhere in mid-cycle, the BCM will continue to operate the motor until the wipers reach the park position. If the ignition is turned OFF while the wipers are in mid-cycle, the wipers will stop immediately where they are and the BCM will park the wipers the next time the ignition is cycled ON.

Moisture Sensitive Wipers

The outside moisture sensor monitors moisture accumulation on the windshield and uses a windshield wiper/washer switch status input to provide wipe commands to the body control module (BCM). The DELAY positions on the wiper/washer switch are used to activate the AUTOMATIC rain sensing operating mode. They are also used to adjust the level of sensitivity to moisture accumulation, which determines the dwell time for commanding a wiper motor wipe cycle.

Accessory voltage is supplied to the outside moisture sensor from the BCM. The sensor is grounded through the ground circuit and G200. Whenever the ignition is in the run or accessory positions, the BCM sends the wiper/washer switch status using a pulse width modulation (PWM) signal through the outside moisture sensor signal 1 circuit to the outside moisture sensor. When a wipe cycle is needed, the moisture sensor sends a PWM voltage signal through the moisture sensor signal 2 circuit back to the BCM requesting the wiper operation.

The outside moisture sensor uses the moisture sensor signal 2 circuit to command wiper motor wipe cycles and to confirm the moisture sensor signal 1 is being received. If at anytime communication between the outside moisture sensor and BCM is lost, the BCM will use the inputs from the windshield wiper/washer switch in the delay positions to operate the wiper motor at continuous variable delay intervals.

Windshield Washers

When the windshield Wash switch is pressed, ground is applied through the switch contacts and the windshield washer switch signal circuit to the body control module (BCM) indicating the windshield wash request. The BCM then energizes the WPR relay, as stated above, and the WSH relay by applying ground through the control circuit to the coil side of the relay. With the wash relay energized, battery voltage from the WPR fuse is applied through the switch side of the relay and out to the control circuit of the windshield washer fluid pump. The wiper motor will operate for 2 wipe cycles after the wash switch is released.

Heated Windshield Washers

The windshield washer solvent heater operates with the standard windshield wiper washer system, and when a heated washer cycle is activated the solvent heater controls the windshield washers through the washer switch signal circuit to the body control module (BCM). The heater is supplied with high current power and ground circuits that are used to energize the heater coils. The low current logic voltage is supplied to the heater through the RUN relay in the underhood fuse block. The RUN relay is a PCB relay energized by the BCM only while the engine is running. The heated washer cycle operation is activated by a separate switch located on the instrument panel accessory switch assembly. When the heated washer fluid switch is pressed the heated washer switch signal circuit is momentarily grounded and the heated washer cycle is activated. During the heated wash cycle the 3 heater elements in the solvent heater are energized, and when the solvent temperature reaches approximately 70° C (160° F) the heater grounds the washer switch signal circuit until the heated solvent is dispensed. The heated washer cycle will run 4 heat and wash actions unless deacitvated by the heated washer switch signal.

Rear Wiper/Washer System Description and Operation

The rear wiper module controls rear wiper motor operation. Battery voltage supplied to the module is used to operate the wiper motor in all modes and to return the rear wiper arm to the park position after the ignition is turned off. Accessory voltage supplied to the rear wiper/washer switch is used to supply the rear window wiper and washer switch signal circuits. In wiper switch positions 1, 2 and WASH the wiper switch signal circuit voltage level to the wiper motor module determines the wiper motor operating mode. A second wash switch contact is used as the washer pump relay control circuit and the washer pump relay will remain energized for as long as the rear washer switch is pressed. The liftgate ajar switch signal circuit provides information to the rear window wiper module about the status of the liftgate. If the liftgate or liftglass is open the rear wiper operation is not performed.

Special Tools

Illustration Tool Number/ Description J 39232 Wiper Transmission Separator J 39529 Wiper Transmission Installer J 39637 Wiper Arm Remover Tool

Scheme 22

Scheme 23

See also:
• Diagnostic System Check - Vehicle (with HP2)
• Diagnostic System Check - Vehicle (without HP2)
• Strategy Based Diagnosis
• Diagnostic Procedure Instructions
• Component Connector End Views
• Circuit Testing
• Connector Repairs
• Testing for Intermittent Conditions and Poor Connections
• Wiring Repairs
• Control Module References
• Diagnostic Repair Verification
• Underhood Electrical Center or Junction Block Replacement
• Turn Signal Multifunction Switch Replacement
• Checking Aftermarket Accessories
• Instrument Cluster Schematics
• Power Mode Mismatch
• Liftgate/Liftgate Window Ajar Indicator Malfunction (Manual Liftgate)
• SIR Warning
• Fastener Caution
• Front Wheelhouse Liner Replacement - Left Side
• Lifting and Jacking the Vehicle
• Tire and Wheel Removal and Installation
• Battery Tray Replacement
• Fluid and Lubricant Recommendations
• Front Fender Rear Upper Bracket Replacement
• Radio Antenna Replacement
• Liftgate Trim Panel Replacement
• DTC B3715
• Rear Wiper/Washer System Description and Operation
• Rear Window Wiper and Washer Switch Replacement