LS 400 V8-4.0L (1UZ-FE) (1990)
Fuel Pump Relay: Testing and Inspection
Fuel Pump Relay
Fuel Pump Relay Inspection
Checking Relay Continuity
- Remove relay.
- Check for continuity between terminal +B and FP.
Desired - Continuity
- Check for continuity between terminal +B and FPR.
Desired - Continuity
- Check for continuity between terminal +B and PR.
Desired - No continuity
- Replace relay if desired results are not achieved.
Fuel Pump Relay Inspection
Checking Relay Operation
- Apply battery voltage across relay terminals +B and FPR.
- Check for continuity between terminal +B and PR.
Desired - Continuity
- Check for continuity between terminal +B and FP.
Desired - No Continuity
- Replace relay if desired results are not achieved.