Diagnostic Test

WARNING: This page is about a different car, the 2005 Jeep Grand Cherokee. However, it is still accessible from the selected car via links, so may be relevant.

1) INTERMITTENT CONDITION
Turn the ignition on.

With the Scan Tool, clear all FCM DTC's.

Turn the Washers on.

With the Scan Tool, read the Wiper/Washers DTC's.

Does the Scan Tool read: B2320-FRONT/REAR WASHER MOTOR CONTROL CIRCUIT HIGH?

Yes
1. Go To step 2).
No
1. The condition that caused the symptom is currently not present. Inspect the related wiring for a possible intermittent condition. Look for any chafed, pierced, pinched, or partially broken wires.
2. Perform BODY VERIFICATION TEST - VER 1 .
2) (W10) WASHER PUMP MOTOR CONTROL CIRCUIT SHORT TO VOLTAGE

Fig 1: Checking (W10) Washer Pump Motor Control Circuit For Short To Voltage
Courtesy of DAIMLERCHRYSLER CORP.

Turn the ignition off.

Disconnect the IPM C1 harness connector.

Disconnect the Washer Pump Motor harness connector.

Turn the ignition on.

Measure the voltage of the (W10) Washer Pump Motor Control circuit.

Is the voltage above 5.0 volts?

Yes
1. Repair the (W10) Washer Pump Motor Control circuit for a short to voltage.
2. Perform BODY VERIFICATION TEST - VER 1 .
No
1. Go To step 3).
3) (W20) WASHER PUMP MOTOR CONTROL CIRCUIT SHORT TO VOLTAGE

Fig 2: Checking (W20) Washer Pump Motor Control Circuit For Short To Voltage
Courtesy of DAIMLERCHRYSLER CORP.

Measure the Voltage of the (W20) Washer Pump Motor Control circuit.

Is the voltage above 5.0 volts?

Yes
1. Repair the (W20) Washer Pump Motor Control circuit for a short to voltage.
2. Perform BODY VERIFICATION TEST - VER 1 .
No
1. Replace the Front Control Module in accordance with the service information.
2. Perform BODY VERIFICATION TEST - VER 1 .