Removal and Replacement

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 ID registration procedure manual - ID codes registration judgement table) [Vehicles with KOS] or (Refer to ID registration procedure manual - ID codes registration judgement table) [Vehicles with WCM].

- After the ECM replacement, register a key code using scan tool MB991958 [ Testing and Inspection].

- When the ECM is replaced, save the vehicle identification number and perform the variant coding.

- 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 Learning Procedure For Idling In MFI Engine).













REMOVAL SERVICE POINT

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





1. [When using recommended tool screw extractor set (MB992678) or equivalent]
(1) Drill in the break-off bolt a hole deep enough for the tap to stand.
(2) Use recommended tool screw extractor set (MB992678) or equivalent to remove the break-off bolt.





2. [When using the flat-tipped screwdriver]
(1) Apply force towards the direction to loose the bolt by a flat-tipped screwdriver.
(2) Remove the break-off bolt.

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.