Diagnostic Routine A

Diagnostic Routine A

Diagnostic Overview

The Wipers Are Inoperative - Windshield

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

Normal Operation and Fault Conditions

REFER to Windshield Wiper Operation

DTC Fault Trigger Conditions






Pinpoint Test

1. CHECK FOR SCCM (Steering Column Control Module) DTCs (Diagnostic Trouble Codes)

1. Ignition ON.

2. Using a scan tool, perform SCCM (Steering Column Control Module) self-test.

Are any SCCM (Steering Column Control Module) DTCs (Diagnostic Trouble Codes) present?








2. CHECK THE FRONT WIPER COMMAND LOW SPEED (F_WIP_SLO_SW) PID (Parameter Identification)

1. Ignition ON.

2. Using a scan tool, view SCCM (Steering Column Control Module) PID (Parameter Identification).

3. While monitoring the SCCM (Steering Column Control Module) PID (Parameter Identification) F_WIP_SLO_SW, place the wiper/washer switch into the windshield wiper LOW position.

Does the PID (Parameter Identification) read ON when the wiper/washer switch is in the LOW position?








3. CHECK THE WINDSHIELD WIPER MOTOR GROUND CIRCUIT FOR AN OPEN

1. Ignition OFF.

2. Disconnect: Windshield Wiper Motor.

3. Measure:





Is the resistance less than 3 ohms?








4. CHECK THE WINDSHIELD WIPER MOTOR VOLTAGE CIRCUIT FOR AN OPEN

1. Ignition OFF.

2. Disconnect: Windshield Wiper Motor (if not previously disconnected).

3. Ignition ON.

4. Measure:





Is the voltage greater than 11 volts?








5. CHECK FOR VOLTAGE TO THE FRONT WIPER RELAY

1. Ignition OFF.

2. Disconnect: Front Wiper Relay.

3. Measure:





Is the voltage greater than 11 volts?








6. CHECK FOR IGNITION VOLTAGE TO THE FRONT WIPER RELAY

1. Measure:





Is the voltage greater than 11 volts?








7. CHECK THE FRONT WIPER RELAY GROUND CIRCUIT FOR AN OPEN

1. Ignition OFF.

2. Measure:





Is the resistance less than 3 ohms?








8. CHECK THE FRONT WIPER RELAY

1. Carry out the Relay-Micro ISO (International Organization for Standardization) component test.

Did the wiper relay pass the component test?








9. CHECK FOR CORRECT WINDSHIELD WIPER MOTOR OPERATION

1. Ignition OFF.

2. Inspect the windshield wiper motor connector.

3. Repair:

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

4. Reconnect the windshield wiper motor connector. Make sure it seats and latches correctly.

5. Connect: Front Wiper Relay (if previously disconnected).

6. Operate the system and verify the concern is still present.

Is the concern still present?