DME Main Relay

DME Main Relay

DME main relay
The relay is driven by the DME control module.

Function of main relay:
Voltage supply to all components in the engine electrical/electronic system

Perceivable effects: - Engine does not run

Diagnosis instruction
Fault codes can be entered in any combination in the fault memory of the engine control module if the system voltage was too low due to battery discharge or due to failure or contact fault of the DME main relay.

If fault code 27C4 main relay is stored in the DME, all fault code entries listed below that were stored at the same km reading (mileage) are to be ignored and deleted. The DME control module should on no account be replaced.