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Diagnostic Test

  1. 1) ACTIVE DTC 
    NOTE: For vehicle communication problems, use the scan tool to refer to the Network Review Screen. The screen depicts a high level view of the vehicle network. Fault and problem areas appear in red. Selecting any of the network components allows access to the source of the problem.

    Ignition on, engine not running.

    With a scan tool, select View DTCs.

    Is the status Active for this DTC? 

    Yes 

    1. Go To  2).

    No 

    1. Refer to the *CHECKING FOR AN INTERMITTENT CONDITION Diagnostic Procedure.
    2. Perform PCM VERIFICATION TEST .
  2. 2) U0121-LOST COMMUNICATION WITH ANTI-LOCK BRAKE MODULE ALSO SET 

    With a scan tool, select View DTCs.

    Is the DTC U0121-LOST COMMUNICATION WITH ANTI-LOCK BRAKE MODULE also set? 

    Yes 

    1. Perform the diagnostic procedure for U0121-LOST COMMUNICATION WITH ANTI-LOCK BRAKE MODULE .
    2. Perform PCM VERIFICATION TEST .

    No 

    1. Replace and program the Powertrain Control Module (PCM) in accordance with the Service Information.
    2. Perform PCM VERIFICATION TEST .
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