Diagnostic Routine H

Diagnostic Routine H

Diagnostic Overview

The Washer Pump Is Inoperative/Does Not Operate Correctly

Refer to Wiring Diagram Set 81 for schematic and connector information Electrical Diagrams.

Normal Operation and Fault Conditions

For the windshield washer system, REFER to Washer System . For the rear window washer system, REFER to Washer System . A component failure in the washer switch, BCM (Body Control Module) or washer pump motor; or a failure in the power, ground or communication circuits causes the washer pump to become inoperative.

DTC Fault Trigger Conditions






Visual Inspection and Diagnostic Pre-checks

Make sure BCM (Body Control Module) fuse 77 (20A) is OK.

Make sure BCM (Body Control Module) fuse 82 (20A) is OK.

Special Tool(s)






Pinpoint Test

1. CHECK FOR BCM (Body Control Module) DTCs (Diagnostic Trouble Codes)

1. Ignition ON.

2. Using a scan tool, carry out the BCM (Body Control Module) self-test.

Are any BCM (Body Control Module) DTCs (Diagnostic Trouble Codes) present?







2. CHECK THE WASHER PUMP MOTOR GROUND CIRCUITS FOR AN OPEN

1. Ignition OFF.

2. Disconnect Washer Pump Motor electrical connector.

3. Measure:





Are the resistances less than 3 ohms?







3. CHECK THE WASHER PUMP CONTROL CIRCUIT FOR AN OPEN

1. Disconnect BCM (Body Control Module) C2280D.

2. Measure:





Are the resistances less than 3 ohms?







4. ISOLATE THE BCM (Body Control Module)

NOTICE: The following step uses a test light to simulate normal circuit loads. Use only the test light recommended in the Special Tools table at the beginning of this system. To avoid connector terminal damage, use the Flex Probe Kit for the test light probe connection to the vehicle. Do not use the test light probe directly on any connector.

1. Ignition ON.

2. Measure:





3. Place the wiper/washer switch into the windshield washer position, then in the rear window washer position and observe the test light.

Does the test light illuminate when the switch is placed in the windshield washer and rear window washer positions?







5. CHECK FOR CORRECT BCM (Body Control Module) OPERATION

1. Ignition OFF.

2. Disconnect and inspect all BCM (Body Control Module) electrical connectors (if not previously disconnected).

3. Repair:

- corrosion (install new connector or terminal - clean module pins)
- damaged or bent pins - install new terminals/pins
- pushed-out pins - install new pins as necessary

4. Connect all BCM (Body Control Module) electrical connectors. Make sure they seat and latch correctly.

5. Operate the system and determine if the concern is still present.

Is the concern still present?