Diagnostic Test

WARNING: This page is about a different car, the 2016 Dodge Durango. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FOR DTCS IN OTHER MODULES
1. With the scan tool, read DTCs.
  Are other modules reporting any DTCs?
  
  Yes
  - If DTCs are set in the PCM, TCM, or ABS, refer to those diagnostic categories first and perform the appropriate diagnostic procedure(s).
  No
  - Go To 2.
CHECK FOR AN ACTIVE DTC
NOTE:
To help in the service of the Adaptive Cruise Control (ACC) system, it is recommended to communicate with the customer to obtain the environmental conditions they were driving in when the cruise control concern took place. Heavy rain, snow, ice, and fog can cause the ACC system to become inoperative. This is considered as a normal operational reaction of the ACC system and no repair is necessary.
1. With the scan tool, attempt to erase Adaptive Cruise Control (ACC) DTCs.
  Can you erase this DTC?
  
  Yes
  - If the DTC can be erased without resetting, no further repair is necessary. Test complete.
  - Perform the ADAPTIVE CRUISE CONTROL VERIFICATION TEST. Refer to ADAPTIVE CRUISE CONTROL VERIFICATION TEST .
  No
  
  NOTE:
  This DTC cannot be caused without faults elsewhere, other than deceleration/acceleration induced externally (e.g. driving in sand or accident).
  - If there are no other DTCs present, and the DTC cannot be cleared or go into a stored state, 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 ADAPTIVE CRUISE CONTROL VERIFICATION TEST .