Engine Control Module: Service and Repair

Engine Control Module Replacement

Service of the engine control module (ECM) should normally consist of either replacement of the ECM or electrically erasable programmable read only memory (EEPROM) programming. If the diagnostic procedures call for ECM replacement, inspect the ECM first to see if the replacement is the correct part. If the ECM is faulty, remove the ECM and install the new service ECM.

The new service ECM will not be programmed. You must program the new ECM. DTC P0602 indicates the EEPROM is not programmed or has malfunctioned.

Notice: 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 board.

Notice: Always turn the ignition off when installing or removing the ECM connectors in order to prevent damage to the components.

Removal Procedure




1. Release the electronic control module (ECM) bracket (1) from the battery cover (2).




2. Release the retaining tabs on the ECM bracket and slide the ECM out of it.
3. Disconnect the engine wiring harness electrical connectors (1) from the ECM (5).

Installation Procedure




1. Connect the engine wiring harness electrical connectors (1) to the ECM (5).
2. Slide the ECM into the ECM bracket until it locks into place.




3. Install the ECM bracket (1) onto the air cleaner assembly cover (2) until it locks in place.
4. Program the ECM, if replacing. Programming and Relearning