Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSJEEP2010GRAND CHEROKEE LIMITED, 5.7 T, 4WDREPAIR AND DIAGNOSISENGINE PERFORMANCEENGINE CONTROL SYSTEMS(FRONT CONTROL MODULE (FCM) - ELECTRICAL DIAGNOSTICS)DTC TROUBLESHOOTINGB2320-FRONT/REAR WASHER MOTOR CONTROL CIRCUIT HIGHDIAGNOSTIC TEST

2010 Jeep Grand Cherokee Limited, 5.7 T, 4WD

Diagnostic Test

2010 Jeep Grand Cherokee Limited, 5.7 T, 4WDSECTION Diagnostic Test

INTERMITTENT CONDITION
1. Turn the ignition on.
2. With the Scan Tool, clear all FCM DTC's.
3. Turn the Washers on.
4. With the Scan Tool, read the Wiper/Washers DTC's.
  Does the Scan Tool read: B2320-FRONT/REAR WASHER MOTOR CONTROL CIRCUIT HIGH?
  
  Yes
  - Go to step 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. See DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure
(W10) WASHER PUMP MOTOR CONTROL CIRCUIT SHORT TO VOLTAGE

Fig 1: Identifying Washer Pump Motor W10 Control Circuit Terminal At IPM C1 Harness Connector
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Disconnect the IPM C1 harness connector.
3. Disconnect the Washer Pump Motor harness connector.
4. Turn the ignition on.
5. Measure the voltage of the (W10) Washer Pump Motor Control circuit.
  Is the voltage above 5.0 volts?
  
  Yes
  - Repair the (W10) Washer Pump Motor Control circuit for a short to voltage.
  - Perform the BODY VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure
  No
  - Go to step 3
(W20) WASHER PUMP MOTOR CONTROL CIRCUIT SHORT TO VOLTAGE

Fig 2: Identifying Washer Pump Motor W20 Control Circuit Terminal At IPM C1 Harness Connector
Courtesy of CHRYSLER LLC
1. Measure the Voltage of the (W20) Washer Pump Motor Control circuit.
  Is the voltage above 5.0 volts?
  
  Yes
  - Repair the (W20) Washer Pump Motor Control circuit for a short to voltage.
  - Perform the BODY VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure
  No
  - Replace the Front Control Module in accordance with the Service Information.
  - Perform the BODY VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure

RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.