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 ).
When the engine-ECU is replaced, register the injector identification code and perform the small injection quantity learning (Refer to GROUP 00 - Precautions Before Service, What The Common Rail Engine Learns ).
When the engine-ECU is replaced, make the battery current sensor learn the neutral point by using M.U.T.-III (Refer to GROUP 00 - Precautions before Service, Battery Current Sensor Calibration ).

Pre-removal and Post-installation Operation

Air Cleaner Body Removal and Installation (Refer to GROUP 15 - Air Cleaner ).

<Except vehicles for England>

			Removal steps
	>>C<<	·	Initialisation operation <only at installation>
<<A>>	>>B<<	1.	Engine-ECU connector
		2.	Bracket
		3.	Engine-ECU and bracket assembly
		4.	Bracket
		5.	Engine-ECU

<Vehicles for England>

			Removal steps
	>>C<<	·	Initialisation operation <only at installation>
<<B>>	>>A<<	1.	Brake off bolt
		2.	Connector cover
<<A>>	>>B<<	3.	Engine-ECU connector
<<B>>	>>A<<	4.	Brake off bolt
		5.	Engine-ECU and bracket assembly
		6.	Bracket
		7.	Engine-ECU

REMOVAL SERVICE POINTS

<<A>> ENGINE-ECU CONNECTOR DISCONNECTION

caution

Be sure to press the connector cover when turning the lock lever, or the connector may be damaged.

note

If the connector cover should come off, engage the lock lever gear with the connector gear. Then, install the connector cover to the connector. Press the lock button to unlock the lock lever. While pressing the connector cover against the connector, turn the lock lever to the vertical position. Then, disconnect the connector from the engine-ECU.

Press the lock button to unlock the lock lever. While pressing the connector cover against the engine-ECU, turn the lock lever to the vertical position. Then, disconnect the connector from the engine-ECU.

<<B>> 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<< ENGINE-ECU CONNECTOR CONNECTION

caution

When inserting the connector to the engine-ECU, be careful not to apply force in the directions other than the inserting direction.

Move the lock lever of the connector to the unlock status, and then install the connector to the engine-ECU. Insert the connector as far as it goes.
2.

caution

Make sure that the connector is inserted sufficiently before locking it, or the lock lever may be damaged.

While pressing the connector toward the engine-ECU side, turn the lock lever to lock the connector.

>>C<< INITIALISATION OPERATION

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