W/Harness Inspection

Power Supply Circuit Inspection

1. Ignition "ON" & Engine "OFF".
2. Measure the voltage between terminal 30 of the fuel pump relay connector and chassis ground.
3. Measure the voltage between terminal 85 of the fuel pump relay connector and chassis ground.
A. Specification : Approx. B+




4. Is voltage within the specification?
YES
1) Go to "Control Circuit Inspection" procedure
NO
1) Check for an open or short to ground in the power supply circuit. Repair as necessary and go to "Verification of Vehicle Repair" procedure.

Control Circuit Inspection

1. Measure the voltage between terminal 86 of the fuel pump relay connector and chassis ground.
A. Specification : 4-5V




2. Is voltage within the specification?
YES
1) Go to next step as below
NO
1) Check for open or short in control circuit. Repair as necessary and go to "Verification of Vehicle Repair" procedure.

Terminal and Connector Inspection

1. Many malfunctions in the electrical system are caused by poor harness(es) and terminals. Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration or damage.
3. Has a problem been found?
YES
1) Repair as necessary and go to "Verification of Vehicle Repair" procedure
NO
1) Thoroughly check for poor connection between ECM and component: backed out terminal, improper mating, broken locks or poor terminal to wire connection. Repair as necessary and go to "Verification of Vehicle Repair" procedure