Jeep Grand Cherokee WK. Manual — part 698

B231F-FRONT/REAR WASHER MOTOR CONTROL CIRCUIT LOW (CONTINUED)

For the Wiper/Washer system circuit diagram (Refer to 8 - ELECTRICAL/WIPERS/WASHERS - SCHEMATICS AND
DIAGRAMS).

For a complete wiring diagram Refer to Section 8W.

•

When Monitored:

•

With the ignition on.

•

Set Condition:

•

When the FCM detects a short/low condition on the washer Pump Motor Control circuit.

Possible Causes

(W10)/(W20) WASHER PUMP MOTOR CONTROL CIRCUIT SHORT TOGETHER

(W10) WASHER PUMP MOTOR CONTROL CIRCUIT SHORT TO GROUND

(W20) WASHER PUMP MOTOR CONTROL CIRCUIT SHORT TO GROUND

WIPER WASHER PUMP

FRONT CONTROL MODULE

Diagnostic Test

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: B231F-FRONT/REAR WASHER MOTOR CONTROL CIRCUIT LOW?

Yes

>> Go To 2

No

>> 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.

Perform the BODY VERIFICATION TEST — VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CON-
TROL MODULES - STANDARD PROCEDURE)

2.

WASHER PUMP MOTOR

Turn the ignition off.

Disconnect the Washer Pump Motor connector.

Turn the ignition on.

With the Scan Tool, read the DTC’s.

Does the Scan Tool read:B231F-FRONT/REAR WASHER MOTOR
CONTROL CIRCUIT LOW?

Yes

>> Go To 3

No

>> Replace the Washer Pump Motor in accordance with the

service information.

Perform the BODY VERIFICATION TEST — VER 1.
(Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL
MODULES - STANDARD PROCEDURE)

8R - 14

WIPERS/WASHERS - ELECTRICAL DIAGNOSTICS

WK

B231F-FRONT/REAR WASHER MOTOR CONTROL CIRCUIT LOW (CONTINUED)

3.

(W10)/(W20) WASHER PUMP MOTOR CONTROL CIRCUITS SHORT TOGETHER

Turn the ignition off.

Disconnect the Washer Pump Motor harness connector.

Disconnect the IPM C1 harness connector.

Measure the resistance between the (W10) and (W20) Washer Pump
Motor Control circuits.

Is the resistance below 5.0 ohms?

Yes

>> Repair the (W10) and (W20) Washer Pump Motor Control

circuits for a short together.

Perform the BODY VERIFICATION TEST — VER 1.
(Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL
MODULES - STANDARD PROCEDURE)

No

>> Go To 4

4.

(W10) WASHER PUMP MOTOR CONTROL CIRCUIT SHORT
TO GROUND

Measure the resistance between ground and the (W10) Washer Pump
Motor Control circuit.

Is the resistance below 5.0 ohms?

Yes

>> Repair the (W10) Washer Pump Motor Control circuit for a

short to ground.

Perform the BODY VERIFICATION TEST — VER 1.
(Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL
MODULES - STANDARD PROCEDURE)

No

>> Go To 5

WK

WIPERS/WASHERS - ELECTRICAL DIAGNOSTICS

8R - 15

B231F-FRONT/REAR WASHER MOTOR CONTROL CIRCUIT LOW (CONTINUED)

5.

(W20) WASHER PUMP MOTOR CONTROL CIRCUIT SHORT TO GROUND

Measure the resistance between ground and the (W20) Washer Pump
Motor Control circuit.

Is the resistance below 5.0 ohms?

Yes

>> Repair the (W20) Washer Pump Motor Control circuit for a

short to ground.

Perform the BODY VERIFICATION TEST — VER 1.
(Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL
MODULES - STANDARD PROCEDURE)

No

>> Replace the Front Control Module in accordance with the

service information.

Perform the BODY VERIFICATION TEST — VER 1.
(Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL
MODULES - STANDARD PROCEDURE)

8R - 16

WIPERS/WASHERS - ELECTRICAL DIAGNOSTICS

WK

B2320-FRONT/REAR WASHER MOTOR CONTROL CIRCUIT HIGH

WK

WIPERS/WASHERS - ELECTRICAL DIAGNOSTICS

8R - 17