Fuel Pump Control System
- Unplug fuel pump relay. See Fig 1 . Turn ignition on. Check for battery voltage between ground and fuel pump relay connector terminals No. 1 (White wire) and terminal No. 3 (Black/White wire).
- If battery voltage is present, go to next step. If battery voltage is not present, check wiring connectors, 15-amp fuse No. 29 and No. 33 in fuse box.
- Turn ignition off. Disconnect fuel pump. Disconnect dropping resistor harness connector, located in luggage compartment. See Fig 2
. Check continuity as follows: See Fig 3
.
- Between dropping resistor harness connector terminal No. 1 (Green/Red wire) and fuel pump harness connector terminal No. 3. (Green/Red wire).
- Between fuel pump harness connector terminal No. 1 (Black/Yellow wire) and fuel pump relay harness connector terminal No. 5 (Black/Yellow wire).
- Between ground and dropping resistor harness connector terminal No. 2 (Black wire).
If continuity exists, go to next step. If continuity does not exists, repair fault in circuit.
- Leave ignition off. Disconnect ECM harness connector. Check continuity between fuel pump relay terminal No. 2 (Black/Pink wire) and ECM harness connector terminal No. 11 (Black/Pink wire). If continuity does not exists, repair fault in circuit. If continuity exists, check fuel pump. If fuel pump is okay, test fuel pump relay. See RELAYS under RELAYS & SOLENOIDS.