Diagnostic Test

CHECK FOR ACTIVE DIAGNOSTIC TROUBLE CODE (DTC)
1. Turn the ignition on.
2. Using the scan tool, read Park Assist Module DTCs.
  Is this DTC active?
  
  Yes
  - Go to step 2
  No
  - The condition that caused this code to set is not present at this time. Check for an intermittent condition by inspecting the related wiring harness for chafed, pierced, pinched, and partially broken wires. Also inspect the related connectors for broken, bent, pushed out, spread, corroded, or contaminated terminals.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure
CHECK THE (D778) FRONT PARK ASSIST DISPLAY SIGNAL CIRCUIT FOR AN OPEN

Fig 1: Checking Front Park Assist Display Signal Circuit For An Open
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Disconnect the Park Assist Module harness connector.
3. Disconnect the Front Park Assist Display Module harness connector.
4. Measure the resistance of the (D778) Front Park Assist Display Signal circuit.
  Is the resistance below 10.0 Ohms?
  
  Yes
  - Go to step 3
  No
  - Repair the (D778) Front Park Assist Display Signal circuit for an open.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure
CHECK THE (X778) FRONT PARK ASSIST DISPLAY SUPPLY CIRCUIT FOR AN OPEN

Fig 2: Checking Front Park Assist Display Supply Circuit For An Open
Courtesy of CHRYSLER LLC
1. Measure the resistance of the (X778) Front Park Assist Display Supply circuit between the Park Assist Module harness connector and the Front Park Assist Display harness connector.
  Is the resistance below 10.0 Ohms?
  
  Yes
  - Go to step 4
  No
  - Repair the (X778) Front Park Assist Display Supply circuit for an open.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure
CHECK THE (X773) FRONT PARK ASSIST DISPLAY GROUND CIRCUIT FOR AN OPEN

Fig 3: Checking Front Park Assist Display Ground Circuit For An Open
Courtesy of CHRYSLER LLC
1. Measure the resistance between ground and the (X773) Front Park Assist Display Ground circuit at the Front Park Assist Display harness connector.
  Is the resistance above 100 Ohms?
  
  Yes
  - Repair the (X773) Front Park Assist Display Ground circuit for an open.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure
  No
  - Go to step 5
CHECK THE OPERATION OF THE FRONT PARK ASSIST DISPLAY
1. Replace the Front Park Assist Display in accordance with the Service Information.
2. Reconnect the Park Assist Module harness connector.
3. Turn the ignition on.
4. Using the scan tool, read DTCs.
  Does the scan tool display U112B-00-LOST COMMUNICATION WITH PTS DISPLAY-FRONT 1?
  
  Yes
  - Replace the Park Assist Module in accordance with the Service Information.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure
  No
  - Test Complete.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure