W/Harness Inspection

Smart Key Unit
B1625 EMS Communication Data Failure - 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 ?






Serial Communicatin Circuit Inspection

Check short in serial communication line
1. "IG KEY OFF".
2. Disconnect SMK unit connector and ECM/PCM connector.
3. Measure resistance between serial communication signal terminal of ECM/PCM harness connector and chassis ground.

Specificatin :Infinite (Infinity)




4. Is the measured resistance within specification ?





Check open in harness
1. IG KEY OFF.
2. Disconnect Smartkey Module connector and ECM/PCM connector.
3. Measure resistance between signal terminal of SMK Unit harness connector and signal terminal of ECM/PCM harness connector.

Specification :About below 1Ohms




4. Is the measured resistance within specification ?