REMOVAL AND INSTALLATION


caution
  • If the engine-ECU is replaced, another ECU related to KOS system should not be replaced together. If at least two ECUs need to be replaced, replace one ECU and then register its ID with M.U.T.-III. Then proceed to the replacement of the other ECU.
  • If the engine-ECU is replaced, perform the coding for it.
  • If the engine-ECU is replaced, use M.U.T.-III to write the Chassis No. (Refer to GROUP 00 - How to Perform Chassis Number Writing ).
  • After the engine-ECU replacement, idling speed may be unstable because the MPI engine learning is not completed. To make it stable, let the system learn the idling (Refer to GROUP 00 - Precautions before Service, Learning Procedure for Idling in MPI Engine ).
Pre-removal and post-installation operation
  • Air Cleaner Assembly Removal and Installation (Refer to GROUP 15 - Air Cleaner ) .

<Except vehicles for England>

Removal steps

>>B<<
 ·
 Initialisation operation <only at installation>


1.
 Engine-ECU connector connection


2.
 Engine-ECU stay


3.
 Engine-ECU and engine-ECU bracket assembly


4.
 Engine-ECU bracket


5.
 Engine-ECU

<Vehicles for England>

Removal steps

>>B<<
 ·
 Initialisation operation <only at installation>
<<A>>
 >>A<<
 1.
 Brake off bolt


2.
 Connector cover


3.
 Engine-ECU connector connection


4.
 Engine-ECU and Engine-ECU bracket assembly
<<A>>
 >>A<<
 5.
 Brake off bolt


6.
 Engine-ECU bracket


7.
 Engine-ECU

REMOVAL SERVICE POINT

<<A>> BREAK OFF BOLT REMOVAL <VEHICLES FOR ENGLAND>

1.<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 the 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 ENGLAND>
Tighten the break off bolt until its head is broken off.

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