Inspection/Repair - W/Harness Inspection

Terminal and Connector inspection

1. Many malfunctions in the electrical system are caused by poor harness and terminal connections.
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?






Signal Circuit Inspection

Check short to ground in harness
1. IG "OFF" and disconnect ECM connector and ESC (ESP) control module connector.
2. Measure resistance between vehicle speed input signal terminal of ECM harness connector and chassis ground.

Specification : Infinite





3. Is the measured resistance within specification?





Check open in harness
1. IG "OFF" and disconnect ECM connector and ESC (ESP) control module connector.
2. Measure resistance between vehicle speed input signal terminal of ECM harness connector and wheel speed sensor output signal terminal of ESC (ESP) control module harness connector.

Specification : below 1 Ohm





3. Is the measured resistance within specification?