Vauxhall Workshop Service and Repair Manuals

Washer Malfunction - Hatchback, Wagon

Diagnostic Instructions

Diagnostic Fault Information

Circuit/System Description

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

Connector End View Reference

Component Connector End Views

Description and Operation

Wiper/Washer System Description and Operation

Electrical Information Reference

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

1. Ignition ON, observe the scan tool Windscreen Washer Switch parameter while activating the S82 Windscreen Wiper/Washer Switch. The parameter should change between Active and Inactive.

⇒	If the value does not change, refer to Multifunction Switch Malfunction.

2. Operate the windscreen washer using the S82 Windscreen Wiper/Washer Switch. Verify that the G24 Windscreen Washer Pump activates. Verify the washer fluid reservoir is filled up.

⇒	If the G24 Windshield Washer Pump does not run, refer to Washer Pump Malfunction.

⇒	If the G24 Windscreen Washer Pump does not shut off, test or replace the KR11 Windscreen Washer Pump Relay.

Circuit/System Testing

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

Multifunction Switch Malfunction

1. Ignition OFF, Retained Accessory Power OFF, disconnect the X3 harness connector at the K9 Body Control Module.
2. Test for less than 5 Ω between the low reference circuit terminal 25 and the low reference circuit terminal 10 while activating the wash function.

⇒	If greater than the specified value, test the low reference circuits for an open/high resistance or a short to voltage. If the circuit tests normal, replace the S82 Windscreen Wiper/Washer Switch.

3. Test for greater than 500 kΩ between the low reference circuit terminal 25 and ground when the S82 Windscreen Wiper/Washer Switch is not used.

⇒	If less than the specified value, test the signal circuit terminal 25 for a short to ground. If the circuit tests normal, replace the S82 Windscreen Wiper/Washer Switch.

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

Washer Pump Malfunction

1. Ignition OFF, disconnect the harness connector at the G24 Windscreen Washer Pump.
2. Test for less than 5 Ω between ground and the ground circuits listed below:

•	Terminal 1

•	Terminal 2

⇒	If greater than the specified value, test the ground circuits for an open/high resistance or a short to voltage.

3. Install a test lamp between the ground circuit terminal 1 and the control circuit terminal 2.
4. Ignition ON, command the Windscreen Washer Relay Command On and OFF with a scan tool. The test lamp should turn ON and OFF as commanded.
5. If the test lamp does not illuminate as expected, test the control circuit for an open/high resistance or a short to ground.
6. If all circuits test normal, test or replace the G24 Windscreen Washer Pump.

Low Washer Fluid Indicator Malfunction

1. Verify the washer fluid reservoir is filled up.
2. Ignition OFF, disconnect the harness connector at the B118B Windshield Washer Fluid Level Switch.
3. Test for less than 5 Ω between the ground terminal 2 and ground.

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

4. Ignition OFF, disconnect the harness connector at the P16 fInstrument Cluster.
5. Test for less than 5 Ω between the signal circuit terminal 1 at the B118B Windscreen Washer Fluid Level Switch harness connector and signal terminal 29 at the P16 Instrument Cluster harness connector.

⇒	If greater than the specified value, test the signal circuit for a short to voltage or an open/high resistance.

6. Reconnect all harness connectors.
7. Ignition ON, command the Driver Information Center Segment test ON and OFF with the scan tool, verify that the low washer fluid indicator display reacts to ON and OFF positions.

⇒	If the low washer fluid indicator display stays always ON or always OFF, replace the P16 Instrument Cluster.

8. If the low washer fluid indicator display changes between ON and OFF, test or replace the B118B Windshield Washer Fluid Level Switch.

Component Testing

Multifunction Switch Test

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

⇒	If not the specified value, replace the S82 Windscreen Wiper/Washer Switch.

Washer Pump Test

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

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

Relay Test

1. Ignition OFF, Retained Accessory Power OFF, disconnect the harness connector X4 at the K9 Body Control Module.
2. Test for 120-160 Ω between the control circuit terminal 14 X4 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. Ignition OFF, remove the B118B Windshield Washer Fluid Level Switch.
2. B118B Windscreen 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 Windscreen Washer Fluid Level Switch.

3. B118B Windscreen Washer Fluid Level Switch closed, test for less than 5 Ω 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 after completing the diagnostic procedure.