Fuel Injection System (Fuel Pump) Relay

With ECU connector removed from ECU, ground ECU connector terminals No. 17, 20 and No. 21. Pump relay should activate fuel pumps, and pumps should start operating. Connect voltmeter between ground and terminal 87/2 in relay. See Figure . Battery voltage should be present. Disconnect ground leads from ECU terminals No. 17, 20 and No. 21. Replace relay if faulty.