IG "OFF" and disconnect Fuel Pump Relay connector.
Measure resistance between battery power supply and power supply to fuel pump motor terminals of fuel pump relay. (Measurement "A")
Measure resistance between battery power supply and fuel pump relay control terminals of fuel pump relay.(Measurement "B")
Terminal | Continuity |
Battery power supply - Power supply to Fuel pump motor | NO |
Battery power supply - Fuel pump relay control | YES(Approx. 70Ω ~ 120Ω) |
Is the measured resistance within specification ?
 | ▶ Substitute with a known - good ECM and check for proper operation. If the problem is corrected, replace ECM and go to "Verification of Vehicle Repair" procedure. |
 | ▶ Substitute with a known - good Fuel Pump Relay and check for proper operation. If the problem is corrected, replace Fuel Pump Relay and go to "Verification of Vehicle Repair" procedure. |
