ECM/PCM Updating and Substitution for Testing

How to Substitute the PCM

Use this procedure when you have to substitute a known-good PCM in a troubleshooting procedure.

1. Remove the PCM from the vehicle.
2. Install a known-good PCM in the vehicle.
3. Rewrite the immobilizer code with the PCM replacement procedure on the Honda PGM Tester. It allows you to start the engine.
4. After completing your tests, reinstall the original PCM and rewrite the immobilizer code with the PCM replacement procedure on the Honda PGM Tester again.