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Diagnostic Test

PERFORM THE INTEGRATED TRAILER CONTROL MODULE (ITCM) VERIFICATION TEST 

NOTE:

If the Powertrain Control Module (PCM) or Body Control Module (BCM) was replaced, refer to the Service Information for proper programming procedures.

  1. Disconnect all jumper wires and reconnect all previously disconnected components and connectors.
  2. Make sure all accessories are turned off.
  3. Make sure the battery is fully charged.
  4. With the scan tool, record and erase all DTC(s) from the ITCM.
  5. Start the engine and allow it to idle for two minutes while operating all functions of the system that caused the original concern.
  6. Turn the ignition off, wait five seconds, then turn the ignition on. Using the scan tool, read DTC(s) from the ITCM.

    Are any ITCM DTC(s) present or is the original condition still present?

    Yes 

    • The repair is not complete. Perform the appropriate diagnostic procedure for the DTC or symptom that is still present.

    No 

    • The repair is complete.
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