Engine Control Module: Service and Repair

How to Remove the ECM/PCM for Testing

If the inspection for a trouble code requires voltage or resistance checks at the ECM/PCM connectors, remove the ECM/PCM and test it:

1. Make sure you have the anti-theft code for the radio, then write down the radio station presets.
2. Disconnect the negative cable from the battery.
3. Remove glove box.




4. Disconnect the gray 20P ECM/PCM wire harness connector, and remove it from the ECM/PCM mounting bracket. Disconnect the 7P mode control motor connector. Remove PGM-FI main relay 2 (A). Remove the ECM/PCM mounting bolt (B) and the bracket.
5. Remove the nuts, then remove the ECM/PCM (C).
6. Install the ECM/PCM in the reverse order of removal.
7. Reconnect the negative cable to the battery.
8. Enter the radio anti-theft code and the radio station preset then set the clock.