W/Harness Inspection

Electronic Control Suspension
C2339 Reverse Valve 2 Failure - Inspection/Repair:_:W/Harness Inspection

Terminal and Connector Inspection

1. Many malfunctions in the electrical system are caused by poor harness(es) 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?






Power Circuit Inspection

Check for open in harness
1. IG "OFF"
2. Disconnect compressor ASS'Y connector and ECS ECU connector.
3. Measure resistance between power(reverse valve 2) terminal of the compressor ASS'Y harness connector and power(reverse valve 2) terminal of the ECS ECU harness connector.

Specification :Below approx. 1Ohms




4. Is the measured value within specification?





Check for short in harness
1. IG "OFF"
2. Disconnect Compressor ASS'Y connector and ECS ECU connector.
3. Measure resistance between power(reverse valve 2) terminal of the Compressor ASS'Y harness connector and chassis ground.

Specification :Infinite




4. Is the measured value within specification?






Control Circuit Inspection

Check for open in harness
1. IG "OFF"
2. Disconnect Compressor ASS'Y connector and ECS ECU connector.
3. Measure resistance between control(reverse valve 2) terminal of the Compressor ASS'Y harness connector and control(reverse valve 2) terminal of the ECS ECU harness connector.

Specification :Below approx. 1Ohms




4. Is the measured value within specification?





Check for short in harness
1. IG "OFF"
2. Disconnect Compressor ASS'Y connector and ECS ECU connector.
3. Measure resistance between control(reverse valve 2) terminal of the Compressor ASS'Y harness connector and chassis ground.

Specification :Infinite




4. Is the measured value within specification?