Diagnostic Test

INTERMITTENT CONDITION
1. Turn the ignition on.
2. With the scan tool, clear all Front Control Module (FCM) DTCs.
3. Turn the Rear Wipers on.
4. With the scan tool, read the Rear Wiper DTCs.
  Does the scan tool read: B230D-REAR WIPER PARK SWITCH INPUT CIRCUIT LOW?
  
  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 .
WIPER/WASHER SWITCH
1. Turn the ignition off.
2. Disconnect the Rear Wiper/Washer Switch connector.
3. Measure the internal resistance of the Wiper/Washer Switch between cavity 1 and 2 of the switch.
  Is the resistance above 5.0 Ohms?
  
  Yes
  - Replace the Rear Wiper/Washer Switch in accordance with the Service Information.
  - Perform the BODY VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure .
  No
  - Go to step 3
FRONT CONTROL MODULE (FCM)

Fig 1: Checking Rear Wiper Park Switch Sense Circuit
Courtesy of CHRYSLER LLC
1. Disconnect the FCM C1 harness connector.
2. Measure the resistance between ground and the (W17) Rear Wiper Park Switch Sense circuit in the Rear Wiper/Washer Switch harness connector.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Repair the short to ground in the (W17) Rear Wiper Park Switch Sense circuit.
  - Perform the BODY VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure .
  No
  - Replace the Front Control Module (FCM) in accordance with the Service Information.
  - Perform the BODY VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure .