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?






Signal Circuit Inspection

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

Specification : Below 1 Ohm





3. Is the measured resistance within specification?





Check wheel speed sensor
1. IG "OFF"
2. Check open or short in wheel speed sensor C1203
3. Is the wheel speed sensor normal?