Diagnostic Test

WARNING: This page is about a different car, the 2015 Chrysler 300. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FOR AN ACTIVE DTC
1. Turn the ignition on.
2. With the scan tool, read Adaptive Cruise Control (ACC) Module DTCs and record on the repair order.
3. With the scan tool, erase ACC Module DTCs.
4. Turn the ignition off.
5. Start the engine.
6. With the scan tool, read ACC Module DTCs.
  Did the DTC return?
  
  Yes
  - Go To 2
  No
  - Go To 3
CHECK THE FORWARD COLLISION WARNING SWITCH OPERATION
1. Turn the ignition off.
2. Replace the Forward Collision Warning (POD) Switch in accordance with the Service Information. (Refer to REMOVAL ).
3. With the scan tool, erase ACC DTCs.
4. Turn the ignition off.
5. Start the engine.
6. With the scan tool, read ACC DTCs.
  Did the DTC return?
  
  Yes
  - Replace and program the Adaptive Cruise Control (ACC) Module in accordance with the Service Information. Refer to MODULE, ADAPTIVE CRUISE CONTROL, REMOVAL .
  - Perform the ADAPTIVE CRUISE CONTROL VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Test Complete
  - Perform the ADAPTIVE CRUISE CONTROL VERIFICATION TEST. Refer to STANDARD PROCEDURE .
CHECK THE WIRING AND CONNECTORS
1. The conditions necessary to set the DTC are not present at this time.
2. Inspect the Forward Collision Warning Switch for any debris that may interfere with proper operation.
3. Using the schematics as a guide, inspect the wiring and connectors specific to Forward Collision Warning Switch. Wiggle the wiring and connectors while checking for shorted and open circuits.
4. Check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension.
5. Check Service Bulletins for any possible causes that may apply.
  Were any problems found?
  
  Yes
  - Repair as necessary.
  - Perform the ADAPTIVE CRUISE CONTROL VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Test complete.