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 " Power Circuit Inspection " procedure.

Ignition "OFF".

Disconnect Fuel Pump Relay.

Ignition "ON" & Engine "OFF".

Measure voltage between terminal 2 of the #1 injector and chassis ground.

Specification : Approx. 11.5 ~ 13.5V

Is the measured voltage within specifications ?

YES

▶ Go to "Control Circuit Inspection" procedure.

NO

▶ Check for short to battery in the power harness.

Repair as necessary and go to "Verification of Vehicle Repair" procedure.

Ignition "OFF".

Disconnect Injector connector.

Ignition "ON" and Engine "OFF".

Measure voltage between terminal 1 of the injector 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 harness.

Repair as necessary and go to "Verification of Vehicle Repair" procedure.