Diagnostic Test

WARNING: This page is about a different car, the 2017 Jeep Cherokee. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FOR AN ACTIVE DTC
NOTE:
This DTC must be active for the results of this test to be valid.
1. Turn the ignition on.
2. With the scan tool, read DTCs.
3. Cycle the ignition switch from on to off to on.
4. With the scan tool, read DTCs.
  Is the DTC active at this time?
  
  Yes
  - Go To 2
  No
  - Go To 4
CHECK IF BODY CONTROL MODULE (BCM) CONTROLLER AREA NETWORK (CAN) BUS DTCS ARE PRESENT
1. With the scan tool, read BCM DTCs.
  Are any BCM CAN BUS DTCs set?
  
  Yes
  - Perform the appropriate diagnostic procedure. Refer to BODY CONTROL MODULE (BCM) - DIAGNOSTIC CODE INDEX .
  No
  - Go To 3
CHECK TO SEE ANY IF POWERTRAIN CONTROL MODULE (PCM) DTCS ARE PRESENT
1. With the scan tool, read PCM DTCs.
  Are any PCM DTCs set?
  
  Yes
  - Perform the appropriate diagnostic procedure. For 2.4L, refer to 2.4L - DIAGNOSTIC CODE INDEX . For 3.2L, refer to 3.2L - DIAGNOSTIC CODE INDEX .
  No
  - Go To 4
CHECK WIRING AND CONNECTORS
1. The conditions necessary to set this DTC are not present at this time.
2. Using the schematics as a guide, inspect the wiring and connectors specific to this circuit.
3. Wiggle test the wiring harness and connectors while checking for shorted and open circuits.
4. With the scan tool, read the data related to this circuit while performing the wiggle test. Look for the data to change or for the DTC to reset.
  Were any problems found?
  
  Yes
  - Repair as necessary.
  - Perform the DTCM VERIFICATION TEST. Refer to DTCM VERIFICATION TEST .
  No
  - Test complete.