W/Harness Inspection

Motor Driven Power Steering
C1693 CAN Signal Error VSM - 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 all connectors (and connections) for looseness, bending, corrosion, contamination, deterioration, and/or damage.
3. Has a problem been found ?






CAN Communication line check

1. Ignition "OFF"
2. Connect ECM, ABS, Cluster connector.
3. Measure registance between terminal 3 and 11 of diagnostic connector.

Specification :About 60 Ohms




4. Is the measured resistance within specification ?






CAN Communication line check

Check short to battery in CAN communication line.
1. IG KEY OFF
2. Disconnect ECM, TCM and ESC(VDC) connector.
3. IG KEY ON
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 0V

Check short to ground in CAN communication line
1. IG KEY OFF.
2. Disconnect ECM, TCM and ESC(VDC) connector.
3. Measure resistnace between CAN high terminal (# 3) of diagnostic connector and chassis ground.
4. Measure resistance between CAN low terminal (# 11) of diagnostic connector and chassis ground.

Specification :Infinity Ohms




5. Is the measured resistance within specification ?