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General Procedure

  1. Establish a scan tool session.
  2. Turn ignition to RUN.
    NOTE: For Intelligent Access (IA) vehicles, REFER to RUN .

    If the Remote Function Actuator (RFA) module has been replaced, it may not be possible to put the ignition in RUN.

    The Remote Function Actuator (RFA) module can communicate with a scan tool with the ignition in the OFF state.

  3. The scan tool first attempts to communicate with the Powertrain Control Module (PCM). After establishing communication with the Powertrain Control Module (PCM), the scan tool then attempts to communicate with all other modules on the vehicle.
  4. If an Integrated Diagnostic System (IDS) session cannot be established with the vehicle, Integrated Diagnostic System (IDS) may state "No communication can be established with the Powertrain Control Module (PCM)."
  5. Choose "NO" when the scan tool prompts whether or not to retry communication.
  6. Enter either a Powertrain Control Module (PCM) part number, tear tag or calibration number to identify the vehicle and start a session. The Powertrain Control Module (PCM) part number and 4-character tear tag number are printed on the Powertrain Control Module (PCM) label. If the Powertrain Control Module (PCM) part number cannot be found, a base part number search on the HVBOM application (under the On-Line Automotive Service Information System (OASIS) tab on the technician service publication website) retrieves the Powertrain Control Module (PCM) part number.
  7. REFER to DIAGNOSTIC ROUTINE A .
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