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Washer Malfunction




Washer Malfunction (Wagon)

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.

Circuit/System Description

The washer fluid pump is a reversible motor and is used to wash both the windshield and rear window.

When the windshield wash switch is pressed, ground is applied to the BCM. This comes form the switch contacts and the windshield washer switch signal circuit indicating the wash request. The BCM energizes the windshield washer pump relay by grounding the control circuit. With the windshield washer pump relay energized, battery voltage is supplied to the windshield wash control circuit of the washer fluid pump. The washer pump is grounded through the de-energized rear window washer fluid pump relay.

When the rear window wash switch is pressed, rear wash switch voltage is applied through the switch contacts an the rear window wiper/washer switch signal circuit to the rear window wiper motor module. The rear window wiper motor module energizes the rear window wash relay by applying battery voltage to the relay control circuit. With the rear window washer fluid pump relay energized, battery voltage is supplied to the rear window wash control circuit of the washer fluid pump and grounded through the de-energized windshield washer pump relay.

Reference Information
Schematic Reference

Wiper/Washer Schematics (Electrical Diagrams)
Connector End View Reference

Component Connector End Views (Connector End Views By Name)
Description and Operation

Wiper/Washer System Description and Operation (Wiper and Washers) (Wiper/Washer System (Wipers and Washers))
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. 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 (Rear Wiper System Malfunction).

2. Ignition ON, observe the scan tool Windshield Washer Switch parameter while pressing and releasing the front washer switch. The reading should change between Active and Inactive.

• If not the specified values refer to Front Washer Switch Circuit Test.

3. Press the front washer switch. The washer pump should operate and fluid should be seen at the front washer.

• If the washer pump does not operate, refer to Washer Pump Circuit Test.

4. Press the rear washer switch. The washer pump should operate and fluid should be seen at the rear washer.

• If the washer pump does not operate, refer to Washer Pump Circuit Test.

Circuit/System Testing

Front Washer Switch Circuit Test
1. Ignition OFF, disconnect the harness connector at the windshield wiper washer switch.
2. Ignition OFF, RAP OFF, wait 1 minute and test for less than 25 ohm between the low reference circuit terminal 2 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. Ignition ON, test for B+ between the signal circuit terminal 5 and ground.

• If less than the specified value, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the BCM.

4. If all the circuits test normal, replace the multifunction switch.

Rear Washer Switch Circuit Test
1. Ignition OFF, disconnect the harness connector at the windshield wiper washer switch.
2. Ignition OFF, RAP OFF, wait 1 minute and test for less than 25 ohm between the low reference circuit terminal 2 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. Ignition ON, test for B+ between the signal circuit terminal 4 and ground.

• If less than the specified value, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the BCM.

4. If all the circuits test normal, replace the multifunction switch.

Washer Pump Circuit Test
1. Ignition OFF, disconnect the Windshield Washer Pump - Front Relay.
2. Test for less than 10 ohm between the ground circuit terminal B2 and ground.

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

3. Ignition ON, verify a test lamp illuminates between the following B+ circuit terminals and ground:

* B+ circuit terminal A1
* B+ circuit terminal A2

• If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance. If the circuits test normal and the B+ circuit fuse is open, test the washer pump control circuits for a short to ground.

4. Install a test lamp between the B+ terminal A1 and the control circuit terminal C2.
5. Using the front wiper washer switch, command the front washers ON and OFF. The test lamp should turn ON and OFF as commanded.

• If the test lamp is always ON, test the control circuit for a short to ground. If the circuit tests normal, replace the BCM.
• If the test lamp is always OFF, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the BCM.

6. Ignition OFF, connect the Windshield Washer Pump - Front Relay. Disconnect the Rear Window Washer Fluid Pump Relay.
7. Test for less than 10 ohm between the ground circuit terminal B2 and ground.

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

8. Test for less than 10 ohm between the control circuit terminal C2 and ground.

• If greater than the specified range, test the control circuit for an open/high resistance. If the circuit tests normal, test or replace the Windshield Washer Pump - Front Relay.

9. Ignition ON, verify a test lamp illuminates between the B+ circuit terminal A2 and ground.

• If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.

10. Install a test lamp between the B+ terminal A1 and the control circuit terminal C2.
11. Using the rear wiper washer switch, command the rear washers ON and OFF. The test lamp should turn ON and OFF as commanded.

• If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the rear wiper motor.
• 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 rear wiper motor.

12. Ignition OFF, connect the Rear Window Washer Fluid Pump Relay. Disconnect the harness connector at the washer pump.
13. Test for less than 10 ohm between the control circuit terminal B and ground.

• If greater than the specified range, test the control circuit for an open/high resistance. If the circuit tests normal, test or replace the Windshield Washer Pump - Front Relay.

14. Test for less than 10 ohm between control circuit terminal A and ground.

• If greater than the specified range, test the control circuit for an open/high resistance. If the circuit tests normal, test or replace the Rear Window Washer Fluid Pump Relay.

15. Connect a test lamp between control circuit terminal A and ground.
16. Ignition ON, command the rear washer on with the rear washer switch. Verify that the test lamp turns on and off with the switch.

• If the test lamp is always on, test the control circuit for a short to B+. If the circuit tests normal, replace the rear window washer fluid pump relay.
• If the test lamp is always off, test the control circuit for an open/high resistance. If the circuit tests normal, replace the rear window washer fluid pump relay.

17. Connect a test lamp between control circuit terminal B and ground.
18. Ignition ON, command the front washer on with the front washer switch. Verify that the test lamp turns on and off with the switch.

• If the test lamp is always on, test the control circuit for a short to B+. If the circuit tests normal, replace the windshield washer pump relay.
• If the test lamp is always off, test the control circuit for an open/high resistance. If the circuit tests normal, replace the windshield washer pump relay.

19. If all circuits test normal, replace the washer pump.

Component Testing

Relay Test
1. Ignition OFF, disconnect the relay.
2. Test for 30-150 ohm between terminals 85 and 86.

• If not within the specified range, replace the relay.

3. Test for infinite resistance between the following terminals:

* 30 and 86
* 30 and 86
* 30 and 85
* 85 and 87

• If not the specified value, replace the relay.

4. Test for less than 5 ohm between terminals 30 and 87.

• If greater than the specified range, replace the relay.

5. Install a 10 A jumper wire between relay terminal 85 and 12 V. Install a jumper wire between terminal 86 and ground. Test for less than 5 ohm between terminals 30 and 87.

• If greater than the specified range, replace the relay.

Repair Instructions

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

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

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