Engine Control Module - Removal

6.7L DIESEL




The Engine Control Module (ECM) (5) is located on the left side of the engine. A support bracket mounts to the block with four capscrews and vibration isolators. A ground wire is fastened to the bracket. The other end of the wire is fastened to the engine block.
1. Record any Diagnostic Trouble Codes (DTC's) found in the ECM.

To avoid possible voltage spike damage to the ECM, ignition key must be off, and both negative battery cables must be disconnected before unplugging ECM connectors.

2. Disconnect both negative battery cables at both batteries.

Access to the ECM is easier by working through the left front wheel opening.

3. Remove left front wheel.
4. Remove plastic left front fender splash shield. Splash Shield - Removal.
5. Remove electrical connector bolts at ECM. Note: As each bolt is being removed, very carefully remove connectors from the ECM.
6. Remove three ECM mounting bolts (6) and remove ECM from engine.