4.
Measure voltage between terminal 3 of the fuel pump relay harness connector and chassis ground.
Specification : Approx. below 1V
Many malfunctions in the electrical system are caused by poor harness and terminals.
Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.
Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
Has a problem been found?
YES
Repair as necessary and go to "Verification of Vehicle Repair" procedure.
NO
Go to "Control Circuit Inspection" procedure.
Ignition "OFF".
Disconnect Fuel Pump Relay and ECM connector.
Igniton "ON" & Engine "OFF".
Measure voltage between terminal 3 of the fuel pump relay harness connector and chassis ground.
Specification : Approx. below 1V
Is the measured voltage within specifications ?
YES
▶ Go to "Component inspection" procedure.
NO
▶ Check for short to battery in control harness.
Repair as necessary and go to "Verification of Vehicle Repair" procedure.
