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. See Battery, replacing Removal and Replacement. 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 Service and Repair. Remove the transmission control module (TCM) Transmission control module (TCM), replacing 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 Specifications [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 Service and Repair and transmission control module (TCM) Transmission control module (TCM), replacing Service and Repair
- the cover for the central electrical unit
- the battery negative pole. Also see Battery, disconnecting Battery Disconnecting.

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.

• Brakes feel soft, pull hard to one side, or make grinding noises.

• The engine overheats, stalls repeatedly, or misfires under load.

• You are missing required tools, torque specs, or safe lifting equipment.

• You are not confident in the next step or safety outcome.

Safety Warning

Central Electrical Unit Engine Compartment

Use the Manual With the Right Hardware

When to See a Mechanic

Rather have a pro handle this?