W/Harness Inspection

Transmission

Automatic Transaxle - P0743 Torque Converter Clutch Circuit Electrical - 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?






Power Supply Circuit Inspection

1. Disconnect "A/T SOLENOID VALVE" connector.
2. Measure voltage between terminal"6" of the sensor harness connector and chassis ground.
3. Engine "OFF" -> "ON"

Specification : 12 V is measured only for approx. 0.5 sec




4. Is voltage within specifications?






Signal Circuit Inspection

Check Signal Circuit Open Inspection
1. Ignition "OFF"
2. Disconnect "A/T SOLENOID VALVE" connector and "PCM/TCM" connector
3. Measure resistance between terminal "9" of the ATM SOLENOID VALVE harness connector and terminal "43" of the TCM harness connector

Specification : Approx. 0 Ohms




4. Is resistance within specifications?





Check Signal Circuit Short Inspection
1. Engine "OFF".
2. Disconnect "A/T SOLENOID VALVE" connector and "PCM/TCM" connector
3. Measure resistance between terminal "9" of the ATM SOLENOID VALVE harness and chassis ground.

Specification : Infinite




4. Is resistance within specifications?