W/Harness Inspection

Terminal and Connector Inspection

1. Many malfunctions in the electrical system are caused by poor harness and terminal condition. 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
- Repair as necessary and go to "Verification of Vehicle Repair" procedure
NO
- Go to" Power Circuit Inspection" procedure.

Power Supply Circuit Inspection

1. IG "OFF"
2. Disconnect Main Relay
3. IG "ON" & ENG "OFF".
4. Measure the voltage between terminal 30 of main relay harness connector and chassis ground.
5. Measure the voltage between terminal 85 of main relay harness connector and chassis ground.
A. Specification : B+

6. Is the measured voltage within specification ?
YES
- Go to "Control Circuit Inspection" procedure.
NO
- Check fuse between battery and main relay is disconnected.
- Repair or replace open or short in harness and then go to "Verification of Vehicle Repair" procedure.

Control Circuit Inspection

1. Check short in harness
(1) IG "OFF".
(2) Disconnect Main Relay and PCM connector.
(3) Measure resistance between terminal 86 of Main Relay and chassis ground.
(4) Measure resistance between terminals 86 and 85 of Main Relay.
A. Specification : Infinite Ohms

(5) Is the measured resistance within specification ?
YES
- Go to "Check open in harness" as follows.
NO
- Repair or replace as necessary and then go to" Verification of Vehicle Repair" procedure.
2. Check open in harness
(1) IG "OFF".
(2) Disconnect Main Relay and PCM connector.
(3) Measure resistance between harness terminal 86 of Main Relay and harness terminal 43 of PCM harness connector.
A. Specification : Approx. below 1 Ohm

(4) Is the measured resistance within specifications ?
YES
- Go to "Component Inspection" procedure.
NO
- Repair or replace as necessary and then, go to "Verification of Vehicle Repair" procedure.