Diagnostic Test

VERIFY THE DTC IS ACTIVE
NOTE:
This DTC must be active for the results of this test to be valid.
1. Perform any Technical Service Bulletins (TSBs) that may apply.
2. Turn the ignition on.
3. With the scan tool, record and erase DTCs.
4. Cycle the ignition switch from off to on.
5. With the scan tool, read DTCs.
  Is the DTC active at this time?
  
  Yes
  - Go To 2
  No
  - Go To 3
(W545) DIESEL REGENERATION (DPF) ON CIRCUIT SHORT TO GROUND
1. Ignition off.
2. Disconnect the VSIM Upfitters harness connector.
3. Measure the resistance of the (W545) Diesel Regeneration (DPF) On circuit and ground.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Repair the (W545) Diesel Regeneration (DPF) On circuit for a short to ground.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Replace the Vehicle System Interface Module (VSIM).
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
INTERMITTENT WIRING AND CONNECTORS
1. Using the appropriate SYSTEM WIRING DIAGRAM/schematic as a guide, inspect the wiring harness and connectors.
2. Wiggle test the wiring harness and connectors while monitoring the scan tool data relative to this circuit.
3. Look for the data to change or for the DTC to reset during the wiggle test.
4. While monitoring the scan tool data relative to this circuit, move the selector switch to each position several times.
5. Look for the data to change other than as expected or for the DTC to reset.
  Were any problems found?
  
  Yes
  - Repair as necessary.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Test complete, the condition or conditions that originally set this DTC are not present at this time.