PCM Updating and Substitution For Testing

PCM Updating and Substitution for Testing

Special Tools Required
Honda Interface Module 07

Use this procedure when you have to substitute a known-good PCM in a troubleshooting procedure. Update the PCM only if the PCM does not already have the latest software loaded.

NOTE: Do not turn the ignition switch OFF while reprogramming the PCM. If you turn the ignition switch OFF, the PCM can be damaged.

How to Update the PCM
1. Turn the ignition switch ON (II). Do not start the engine.





2. Connect the Honda Interface Module (HIM) (A) to the data link connector (DLC) (B) located under the driver's side of dashboard.
3. Do the PCM update procedure as described on the HIM label and in the PCM update system. If the software in the PCM is the latest version, substitute the PCM.

How to Substitute the PCM
1. Write down the radio anti-theft code, radio station presets, and download the immobilizer codes.
2. Disconnect the negative cable from the battery.
3. Remove the PCM from the vehicle.
4. Install a known-good PCM in the vehicle.
5. Reconnect the negative cable to the battery.
6. Rewrite the immobilizer code with the PCM replacement procedure on the Honda PGM Tester. It allows you to start the engine.
7. After completing your tests, reinstall the original PCM and rewrite the immobilizer code with the PCM replacement procedure on the Honda PGM Tester again.