Fuel Pump Control System (I30)
- Remove fuel pump relay. See Fig 1 . Turn ignition switch to RUN position. Check for battery voltage between ground and fuel pump relay harness connector terminal No. 1 (Brown 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, fuse No. 17 (10-amp) and fuse No. 32 (15-amp) in fuse box.
- Turn ignition switch to LOCK position. Disconnect fuel pump. Disconnect dropping resistor harness connector. See Fig 2
. Check continuity as follows:
- Between dropping resistor harness connector terminal No. 1 (Green/Red wire) and fuel pump harness connector terminal No. 2 (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 appropriate circuit.
- Leave ignition off. Disconnect PCM harness connector. Check continuity between fuel pump relay harness connector terminal No. 2 (Black/Pink wire) and PCM 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.