Control Module Disconnection

Wait 3 minutes after switching off the ignition before disconnecting the connectors from the engine control module (ECM). The system relay must be voltage free before the control module can be removed from the vehicle. If the engine cooling fan (FC) runs on after the ignition has been switched off, wait until it stops and then wait for a further 3 minutes.
Remove the engine control module (ECM).
see ENGINE CONTROL MODULE (ECM), REPLACING
Install cover plate see 9512974 over the hole after the engine control module (ECM).

NOTE:

Ensure that the cover plate is properly sealed