How to Troubleshoot the Fuel and Emissions Systems
How to End a Troubleshooting Session (required after any troubleshooting)
  1. Reset the ECM/PCM with the HDS.
  1. Do the ECM/PCM idle learn procedure.
  1. Turn the ignition switch to LOCK (0).
  1. Disconnect the HDS from the DLC.
    NOTE: The ECM/PCM is part of the immobilizer system. If you replace the ECM/PCM, it will have a different immobilizer code. In order for the engine to start, you must rewrite the immobilizer code with the HDS (immobilizer system section).