W/Harness Inspection

C1616 CAN Bus Off

Inspection/Repair - W/Harness Inspection

Terminal and Connector Inspection

1. Many malfunctions in the electrical system are caused by poor harness and terminal condition. Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check all connectors (and connections) for looseness, bending, corrosion, contamination, deterioration, and/or damage.
3. Has a problem been found?






CAN register and communication line inspection

CAN register and communication line inspection 1
1. IG KEY OFF.
2. Connect PCM, 4WD ECM, TCM, ABS connector.
3. Measure registance between terminal 3 and 11 of diagnostic connector.

Specification : About 60 Ohms








4. Is the measured resistance within specifications?





CAN register and communication line inspection 2
1. IG KEY OFF
2. Disconnect PCM, Instrument Cluster connector.
3. Measure resistance between terminal CAN Low and CAN High of PCM (ECM).

Specification : Approx. 120 Ohms








4. Is the measured value within specification?






CAN communication line inspection

Check short to battery in CAN communication line.
1. IG KEY OFF.
2. Disconnect PCM, TPMS ECU, TCM and ABS connector.
3. IG KEY OFF
4. Measure voltage between CAN high terminal (# 3) of diagnostic connector and chassis ground.
5. Measure voltage between CAN low terminal (#11) of diagnostic connector and chassis ground.

Specification : About 0 V








6. Is the measured value within specification?