Diesel Data: Automotive Repair

Fuel Pump Relay: Description and Operation



With GEMS (Generic Engine Management System)

Fuel Pump Relay
This relay is fed from the ignition relay and controlled by the ECM (Z132). It is pulled in on ignition II position to prime the fuel system. If the key remains in the ignition II position, then the relay falls out after a few seconds, precisely when determined by the ECM (Z132).