Ignition "OFF" & Engine "OFF"

Disconnect Fuel Pump Relay

Measure resistance between terminals 3 and 5 of the Fuel Pump Relay connector (Component side).

Specification : 90 ~ 100Ω (20°C)

Is the measured resistance within specifications ?

YES

▶ Go to "Check Electric Fuel Pump Relay " as below.

NO

▶ Substitute with a known-good Electric Fuel Pump Relay and check for proper operation.

If the problem is corrected, replace Electric Fuel Pump Relay and then go to "Verification of Vehicle Repair" procedure.

Ignition "OFF" & Engine "OFF".

Connect Fuel Pump relay and Disconnect ECM connector.

Ignition "ON" & Engine "OFF".

Ground terminal 24 of ECM harness connector to operate Fuel Pump Relay. Or, Use Actuator Test mode in scantool to operate Electric Fuel Pump Relay.

Is the Fuel Pump Relay operating corrctly ?

YES

▶ Go to "Check Fuel Pump Power Circuit" as below.

NO

▶ Substitute with a known-good Fuel Pump Relay and check for proper operation.

If the problem is corrected, replace Fuel Pump Relay and then go to "Verification of Vehicle Repair" procedure.

Ignition "OFF" & Engine "OFF".

Disconnect Fuel Pump relay.

Jump terminal 1 and 2 of Fuel Pump Relay harness connector with jumper wire.

Is operating sound of the Fuel Pump heard ?

YES

▶ Substitute with a known-good Fuel Pump Relay and check for proper operation.

If the problem is corrected, replace Fuel Pump Relay and then go to "Verification of Vehicle Repair" procedure.

NO

▶ Substitute with a known-good ECM and check for proper operation.

If the problem is corrected, replace ECM and then go to "Verification of Vehicle Repair" procedure.