Engine control module (ECM)

ENGINE CONTROL MODULE (ECM)

Service repair no - 18.30.01

Remove

1. Disconnect battery earth lead.

2. Disconnect multiplug from ECM.
3. Disconnect vacuum hose from ECM.
4. Remove nut and bolt securing ECM to mounting bracket.
5. Release and remove ECM.

Refit

1. Fit ECM to mounting bracket.
2. Fit nut and bolt securing ECM to mounting bracket and tighten to 9 Nm.
3. Connect vacuum hose to ECM.
4. Connect multiplug to ECM.
5. Connect battery earth lead.

NOTE: If a new ECM has been fitted, the ECM will need to be programmed with the code from the Central Control Unit (CCU) using TestBook, before the engine can be started. In addition, a TestBook ’throttle initialisation’ procedure MUST be carried out.

IDLE AIR CONTROL (IAC) VALVE

Service repair no - 18.30.05

Remove

1. Disconnect battery earth lead.

2. Disconnect multiplug from IAC valve.
3. Remove 2 Torx screws securing IAC valve to inlet manifold.
4. Remove IAC valve.
5. Remove and discard ’O’ ring.

Refit

1. Clean mating faces of IAC valve and inlet manifold.
2. Lubricate NEW ’O’ ring with silicone grease and fit to IAC valve.
3. Fit IAC valve to inlet manifold.
4. Fit Torx screws securing IAC valve and tighten to 1.5 Nm.
5. Connect multiplug to IAC valve.
6. Connect battery earth lead.