Power Supply to Control Unit or Fuel Pump Check

Fig. 1a Digital Motor Electronics (DME) Wiring diagram:

Fig. 1b Digital Motor Electronics (DME) Wiring diagram:

Control Unit
1. With ignition Off, disconnect multiple pin plug from DME ECU.
2. Turn ignition On. Using suitable voltmeter, measure voltage between terminals 5 and 35 and 5 and 18 Fig. 1. Battery voltage should exist.
3. If battery voltage does not exist, check fuel pump relay, 9 pin connector above brake booster and wiring.



Fuel Pump
1. Check fuse 2 in auxiliary fuse box.
2. Check fuel pump relay.
3. Connect battery voltage to terminal 4 of 9 pin connector above brake booster, or jump terminals 30 and 87b of fuel pump relay socket.
4. Fuel pump should operate. If not, check fuel pump.