Central Electrical Unit Engine Compartment

Central electrical unit engine compartment, replacing

Removal

Preparatory work

Note! As the illustrations in this service information are used for different model years and / or models, some variation may occur. However, the essential information in the illustrations is always correct.




- Disconnect the battery negative lead. Also see Battery, disconnecting Battery Disconnecting
- Remove the power steering fluid and coolant reservoirs. Lift up and move to one side
- Remove the cover from the central electrical unit
- Remove the engine control module (ECM) Engine control module (ECM), replacing, B5244T5, B5254T2 Service and Repair. Remove the transmission control module (TCM) Transmission control module (TCM), replacing, B5244T5, AW55-50/51SN, B5254T2, AW55-50/51SN, B5254T2, AW50/51 AWD Service and Repair.

Removing the central electrical unit




Release the 3 clips.

Remove:
- intermediate section
- the engine cooling fan (FC) if applicable
- the 2 screws for the connector holder at the front edge. Disconnect the retaining clips for the connector holder using a screwdriver. Pull up the contact holder and the rubber grommet
- the screw at the rear edge of the bottom piece
- the tie straps for the cables
- the bottom section by pulling it backwards until the hook releases.

Removing the connector




- Remove the tie straps from the cables
- Disconnect the connector by releasing the locks on the front edge
- Pull out and remove the connector.

Installation

Note! For tightening torques, see Tightening torque [1][2]Specifications.

Installing the connector
Press the connector into the holder.

Central electrical unit, installing

Install:
- the tie straps for the cables
- the bottom section. Hook into place at the front edge
- the screw in the rear edge. Tighten
- the connector holder. Press into the catch.

Note! The rubber grommet

- the screws
- the engine cooling fan (FC) if applicable
- the intermediate section. Check that all 3 clips have engaged.

Finishing work

Install:
- engine control module (ECM) Engine control module (ECM), replacing, B5244T5, B5254T2 Service and Repair and transmission control module (TCM) Transmission control module (TCM), replacing, B5244T5, AW55-50/51SN, B5254T2, AW55-50/51SN, B5254T2, AW50/51 AWD Service and Repair
- the cover for the central electrical unit
- the battery negative pole. Also see Battery, disconnecting Battery Disconnecting.