Updating the ECM/PCM

How To Substitute The ECM For Tosting Purposes-'00-01 M/T Models

Use this procedure if you need a known-good ECM to test a vehicle. It allows you to swap a ECM from a "donor" vehicle without having to program it to the test vehicle's ignition key.

1. Cut a temporary ignition key for the test vehicle with a non-immobilizer key blank.
2. Remove the ECM from the test vehicle.
3. Write the test vehicle's VIN on the ECM you just removed to avoid confusing it with the donor vehicle's ECM.
4. Remove the known-good ECM from the donor vehicle, and install it in the test vehicle.




5. Tape the donor vehicle's ignition key head-to-head to the test vehicle's temporary key (A). The ECM will recognize the code from the donor vehicle's key (B) and allow you to start the engine with the temporary key.

6. After completing your tests, reinstall both ECMs, and destroy the temporary key.