W/Harness Inspection

4WD Control

P1750 Wheel Speed Sensor Signal (Left Front) - 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?






CAN Signal Inspection

1. IG key "ON", ENGINE "ON".
2. Connect 4WD ECM connector
3. Monitor signal waveform between CAN high/low of 4WD ECM harness connector and chassis ground.
4. Start and drive vehicle in gear and maintain vehicle speed approx. 10 km/h or less (6 mph or less)

Specification : Signal Waveform & Data












Fig.1) CAN Signal : high & low

CAUTION:
The above value is only for reference.
The actual value may differ from it according to various engine condition.

5. Is CAN (FLSS) comm. Line Signal display near the specified value?






CAN comm. Line Inspection

1. IG key "OFF", ENGINE "OFF".
2. Disconnect 4WD ECM connector
3. Measure resistance between CAN High line and CAN Low line of the 4WD ECM harness connector.

Specification : Approx. 60 Ohms









CAUTION:
The above value is only for reference.
The actual value may differ from it according to various engine condition.

4. Is resistance display near the specified value?