Removal and Replacement

ENGINE CONTROL MODULE (ECM) REMOVAL AND INSTALLATION

CAUTION:
- When the ECM is replaced, do not replace the immobilizer ECU (WCM) or KOS-ECU simultaneously. When multiple ECUs are to be replaced, always replace only one ECU at a time and complete necessary ID registration using scan tool MB991958 (Refer to Troubleshooting - ID Code Registration Necessity Judgment Table) [Vehicle with KOS installed] (Refer to Troubleshooting - ID Code Registration Necessity Judgment Table) [Vehicle with WCM installed].
- After the ECM replacement, idling speed may be unstable because the MFI engine learning is not completed. To make it stable, let the system learn the idling.
- After the ECM replacement, register a key code using scan tool MB991958. (Refer to Precautions before service - Learning Procedure for Idling in MFI Engine).
- When the ECM is replaced, save the vehicle identification number and perform the variant coding.

Removal Steps 1-7:

REMOVAL SERVICE POINT

[[A]] BREAK-OFF BOLT REMOVAL [VEHICLES FOR CANADA]







1. Drill in the break-off bolt a hole deep enough for the tap to stand.
2. Remove the break-off bolt with a left-hand tap.

INSTALLATION SERVICE POINTS

]]A[[ BREAK-OFF BOLT INSTALLATION [VEHICLES FOR CANADA]
Tighten until the head of break-off bolt is broken off.

]]B[[ INITIALIZATION OPERATION
Turn the ignition switch to the "ON" position and then to "LOCK" (OFF) position and hold it for at least 10 seconds.