Engine Control Module: Service and Repair

Engine Control Module (ECM) Removal and Installation

CAUTION: As ECM consists of precision parts, be careful not to expose it to excessive shock.

NOTE:
^ For vehicle equipped with EVAP leak check system:
If ECM is replaced with new one (VIN data is still not registered) or with used one (VIN data of other vehicle has been registered previously), make sure that re-register VIN data correctly by performing VIN Registration (EVAP Leak Check Model).
Otherwise, MIL remains on even if the engine stared or it causes the inconsistency between registered VIN data in ECM and actual VIN.
^ For vehicle equipped with immobilizer control system:
If ECM is replaced with new one or with another one, make sure to register immobilizer transponder code to ECM correctly according to Procedure after ECM Replacement.

Removal

1. Disconnect negative cable at battery.
2. Remove ECM cover.
3. Disconnect connectors from ECM as follows.
a. Push lock (1) to release locking of lock lever (2).




b. Turn lock lever to arrow direction until it stops.




4. Remove ECM (1) from its bracket by removing its mounting bolts (2).

Installation

Reverse removal procedure noting the following:
^ Connect connectors to ECM as follows.




a. Make sure that lock lever of ECM connector is unlock position.




b. Insert ECM connectors to ECM until it stops with unlocked lock lever.




c. Lock ECM connectors securely by pulling its lock lever up.