W/Harness Inspection

Engine Control
U0001 High Speed CAN Communication Bus off - Inspection/Repair:_:W/Harness Inspection

Terminal & 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 communication circuit inspection

Check CAN BUS Short to Ground
1. IG "OFF".
2. Disconnect CAN communication modules.
3. Measure the resistance between CAN-HIGH terminal of DLC harness connector and and chassis ground
4. Measure the resistance between CAN-LOW terminal of DLC harness connector and and chassis ground

Specification :Discontinuity ( Infinite Ohms )

5. Is the measured resistance within specification ?





Check CAN BUS Short to battery
1. IG "OFF".
2. Disconnect CAN communication modules.
3. IG "ON".
4. Measure the voltage between CAN-HIGH terminal of DLC harness connector and and chassis ground.
5. Measure the voltage between CAN-LOW terminal of DLC harness connector and and chassis ground.

Specification :below 0V

6. Is "voltage" display near the specified value?





Check open in CAN BUS line
1. IG "OFF" and disconnect CAN communication modules.
2. Check resistance between CAN-HIGH terminal of Data Link Connector and CAN-HIGH terminal of each module.(Measurement "A")
3. Check resistance between CAN-LOW terminal of Data Link Connector and CAN-LOW terminal of each module.(Measurement "B")

Specification :Below 1.0Ohms

4. Is the measured resistance within specification ?