Engine Control Module (ECM) Replacement

ECM Replacement:

IMPORTANT:
^ In order to prevent any internal ECM damage, the ignition must be turned OFF when disconnecting or reconnecting the power to the ECM. This includes disconnecting/reconnecting the battery cables, the ECM fuse, the jumper cables, etc.
^ In order to prevent any possible electrostatic discharge damage to the ECM, do not touch the connector pins or the soldered components on the circuit boards.
^ When replacing the production ECM (1) with a service ECM, it is important to transfer the broadcast code and the production ECM number to the service ECM label. Do not record on the ECM cover. This will allow positive identification of the ECM parts throughout the service life of the vehicle.



REMOVAL
1. Turn off the ignition.
2. Grasp the ECM and slide the unit straight up and out of the underhood relay center.
3. Flip the release lever and disconnect the harness connector (1) from the ECM.

INSTALLATION
1. The ignition must be off.
2. Carefully align the harness connector with the ECM connector (1). Insert the end of the connector where the harness exits, into the ECM first.
3. Guide the connector into place while moving the release lever to the locked position.
4. Align the backing plate of the ECM with the slots in the relay center and slide the unit straight down into the underhood relay center.

FUNCTIONAL CHECK
To verify correct operation of the new ECM, perform the Diagnostic System Check. Testing and Inspection