W/Harness Inspection

Air Conditioner
B1688 Cluster Ionizer Fault - Inspection/Repair:_:W/Harness Inspection

Terminal and Connector Inspection

1. 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.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration,or damage.
3. Has a problem been found?






Diagnosis Circuit Inspection

Check power in harness
1. Ignition "ON"
2. Measure voltage between Diagnosis terminal of Cluster Ionizer harness connector and chassis ground.

Specification
1)At over 1.5V: Cluster Ionizer is O.K.
2)At below 1.5V: Cluster Ionizer is abnormal.

3. Is the measured voltage below 1.5V?





Check for open in harness
1. Ignition "OFF"
2. Disconnect Cluster Ionizer and A/C control unit main harness connector.
3. Measure resistance between ground terminal of Cluster Ionizer harness connector and ground terminal of A/C-ECU harness connector.

Specification :below 1Ohms

4. Is the measured resistance within specification?






Power Circuit Inspection

Check for open in harness
1. Ignition "OFF"
2. Disconnect Cluster Ionizer and Connect A/C control unit main harness connector.
3. Ignition "ON"
4. Measure voltage between Power terminal of Cluster Ionizer harness connector and chassis ground.

Specification :BATT.

5. Is the measured voltage within specification?






Signal Circuit Inspection

Check for open in harness
1. Ignition "OFF"
2. Disconnect Cluster Ionizer and A/C control unit main harness connector.
3. Measure resistance between signal terminal of Cluster Ionizer harness connector and signal terminal of A/C-ECU harness connector.

Specification :below 1Ohms

4. Is the measured resistance within specification?