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 (Refer to Precautions before Service - Learning Procedure for Idling in MFI Engine).
- After the ECM replacement, register a key code using scan tool MB991958 [Refer to Precautions before Service - How to Perform Vehicle Identification Number (VIN) Writing].
- When the ECM is replaced, save the vehicle identification number and perform the variant coding.

Pre-Removal And Post-Installation Operation:

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.