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Home >> Chevrolet >> 2012 >> Volt L4-1.4L Elect >> Repair and Diagnosis >> Wiper and Washer Systems >> Testing and Inspection >> Symptom Related Diagnostic Procedures >> Washer Malfunction

Washer Malfunction




Washer Malfunction

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis Strategy Based Diagnosis for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions Diagnostic Procedure Instructions provides an overview of each diagnostic category.

Diagnostic Fault Information






Circuit/System Description

The body control module (BCM) controls the windshield washer fluid pump based on an input from the wiper/washer switch. The BCM monitors the washer switch through the windshield washer switch signal circuit. When the wash switch is closed, ground is supplied to the windshield washer switch signal circuit. When this is the case, the BCM will command the windshield washer fluid pump and the low speed wipers on.

On some vehicles, warning information (wash fluid low) will be conveyed via the GMLAN to the controls and displays subsystem (responsible for display). This subsystem will provide visual feedback to the customer while in the RUN power mode.

Reference Information
Schematic Reference

Wiper/Washer Schematics Electrical Diagrams
Connector End View Reference

Component Connector End Views Hybrid/EV Battery Pack X1
Description and Operation

Wiper/Washer System Description and Operation Description and Operation
Electrical Information Reference

* Circuit Testing Circuit Testing
* Connector Repairs Connector Repairs
* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections
* Wiring Repairs Wiring Repairs

Scan Tool Reference

Control Module References Programming and Relearning for scan tool information

Circuit/System Verification

1. Vehicle in Service Mode, observe the scan tool Windshield Washer Switch parameter while pressing and releasing the S82 Windshield Wiper/Washer Switch. The parameter should change between INACTIVE and ACTIVE.

• If the reading does not change between INACTIVE and ACTIVE, refer to Windshield Washer Switch Circuit Test.

2. Command the Windshield Washer Relay Command ON and OFF with a scan tool. The windshield washers should turn ON and OFF when changing between the commanded states.

• If the windshield washers do not turn ON and OFF, refer to Washer Pump Circut Test

3. Verify the washer fluid level is above the minimum level.

• If not above the minimum level, fill the reservoir and inspect for leaks. If the low washer fluid indicator is still ON, refer to Low Washer Fluid Indicator Test.

Circuit/System Testing

Note: You must perform the Circuit/System Verification before proceeding with Circuit/System Testing.

Windshield Washer Switch Circuit Test
1. Vehicle OFF, disconnect the harness connector at the S82 Windshield Wiper/Washer Switch.
2. Verify that a test lamp illuminates between low reference circuit terminal 2 and B+.

• If the test lamp does not illuminate, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the K9 BCM.

3. Vehicle in Service Mode, verify the scan tool Windshield Washer Switch parameter is INACTIVE.

• If not the specified value, test the signal circuit terminal 5 for a short to ground. If the circuit tests normal, replace the K9 BCM.

4. Install a 3 A fused jumper wire between the signal circuit terminal 5 and ground. 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 K9 BCM.

5. If all circuits test normal, test or replace the S82 windshield wiper/washer switch.

Washer Pump Circuit Test
1. Vehicle OFF, disconnect the X1 harness connector at the X50A underhood fuse block.
2. Connect a test lamp between the control circut terminal 35 and ground.
3. Vehicle in Service Mode, command the Windshield Washer Relay Command 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 K9 BCM.
• If the test lamp is always OFF, test the control circuit for a short to ground or open/high resistance. If the circuit tests normal, replace the K9 BCM.

4. Vehicle OFF, connect the X1 harness at the X50A underhood fuse block and disconnect the harness connector at the G24 Windshield Washer Pump.
5. Test for less than 5 ohm between the ground circuit terminal 2 and ground.

• If greater than the specified range, test the ground circuit for an open/high resistance.

6. Connect a test lamp between control circuit terminal 1 and ground.
7. Vehicle in Service Mode, command the Windshield Washer Relay Command 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 X50A 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 X50A underhood fuse block.

8. If all circuits test normal, test or replace the G24 Windshield Washer Pump.

Low Washer Fluid Indicator Malfunction
1. Vehicle OFF, disconnect the harness connector at the B118B windshield washer fluid level sensor.
2. Test for less than 5 ohm between the ground terminal 2 and ground.

• If greater than the specified range, test the ground circuit for an open/high resistance.

3. Vehicle in Service Mode, verify the scan tool Washer Fluid Level Switch parameter is OFF.

• If not the specified value, test the signal circuit terminal 1 for a short to ground. If the circuit tests normal, replace the P16 instrument cluster.

4. Install a 3 A fused jumper wire between the signal circuit terminal 1 and ground. Verify the scan tool Washer Fluid Level Switch parameter is ON.

• 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 P16 instrument cluster.

5. If all circuits test normal, test or replace the B118B windshield washer fluid level sensor.

Component Testing

Washer Switch Test
1. Vehicle OFF, disconnect the harness connector at the S82 Windshield Wiper/Washer Switch.
2. Test for less than 5 ohm between the switch terminals 2 and 5 while activating the washer function.

• If not the specified value, replace the S82 Windshield Wiper/Washer Switch.

Washer Pump Test
1. Vehicle OFF, disconnect the harness connector at the G24 Windshield Washer Pump.
2. Install a 10 A fused jumper wire between the control terminal 1 and 12 V. Install a jumper wire between the ground terminal 2 and ground.
3. Verify the G24 Windshield Washer Pump is activated.

• If the G24 Windshield Washer Pump does not activate, replace the G24 Windshield Washer Pump.

Relay Test
1. Vehicle OFF, Retained Accessory Power OFF, disconnect the harness connector X4 at the K9 Body Control Module.
2. Test for 120-160 ohm between the control circuit terminal 14 and ground.

• If less than the specified value, test the control circuit for a short to ground.
• If greater than the specified value, test the control circuit for an open/high resistance or a short to voltage.

3. If all circuits test normal, test or replace the K9 Body Control Module.

Low Washer Fluid Switch Test
1. Vehicle OFF, remove the B118B Windshield Washer Fluid Level Switch.
2. B118B Windshield Washer Fluid Level Switch open, test for infinite resistance between the signal circuit terminal 1 and the ground terminal 2.

• If not the specified value, replace the B118B Windshield Washer Fluid Level Switch.

3. B118B Windshield Washer Fluid Level Switch closed, test for less than 5 ohm between the signal circuit terminal 1 and the ground terminal 2.

• If not the specified range, replace the B118B Windshield Washer Fluid Level Switch.

Repair Instructions

Perform the Diagnostic Repair Verification Verification Tests after completing the diagnostic procedure.

* Fuse Block Replacement Fuse Block Replacement
* Relay Replacement (Attached to Wire Harness) Relay Replacement (Attached to Wire Harness)Relay Replacement (Within an Electrical Center) Relay Replacement (Within an Electrical Center)
* Windshield Wiper and Washer Switch Replacement Service and Repair
* Windshield Washer Pump Replacement Windshield Washer Pump Replacement
* Control Module References Programming and Relearning for BCM replacement, setup, and programming

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