Engine Control Module: Application and ID

Engine Control Module (ECM) - (up to 99MY)
The engine control module (ECM) prior to 99MY is a GEMS (Generic Engine Management System), it is located in a plastic moulded box behind the battery in the engine compartment.

The ECM has various sensors fitted to the engine to allow it to monitor engine condition. The ECM processes these signals and decides what actions to carry out to maintain driveability, after comparing the information from these signals to mapped data within its memory.

The black plastic case which houses the ECM protects it from sources of contamination including heat. The ECM itself is contained in a cast aluminium case. The ECM has 3 independent connectors totalling 90 pins, of which up to 66 are used, dependent on market variations.

Input / Output



C509:18-pin black connector
C507:36-pin red connector
C505:36-pin black connector