Esteem & Swift
- Turn ignition on. If fuel pump is heard for 2 seconds, circuit is in good condition. If fuel pump is not heard, go to next step.CAUTION: Ensure jumper connections are made correctly. Improper connections may result in damage to PCM and wire harness.
- Turn ignition off. Remove fuel pump relay from engine compartment relay box. Using a fused jumper wire, connect terminal cavities No. 1 and 2 at relay box together. See Fig 1 or Fig 2 . Turn ignition on. If fuel pump is heard, go to next step. If fuel pump is not heard, check for open in Pink wire, Black wire or Red/Black wire (White/Black wire on Swift) to fuel pump relay connector. Repair as necessary. If wires are okay, replace fuel pump and retest system.
- Turn ignition off. Using DVOM, measure resistance between fuel pump relay terminals. See Fig 3 . Continuity should not be present between relay terminals No. 1 and 2. Resistance between relay terminals No. 3 and 4 should be 70-110 ohms on Esteem, or 79-95 ohms on Swift. Continuity should be present between relay terminals No. 1 and 2 as battery voltage and ground are applied to relay terminals No. 3 and 4. If resistance is as specified, go to next step. If resistance is not as specified, replace fuel pump relay and retest system.
- Check Yellow/Blue wire (Pink/White wire on Swift) between PCM and fuel pump relay for an open or poor connection. Repair as necessary. If wire is okay, replace PCM and retest system.