W/Harness Inspection

Automatic Transaxle
U0001 High Speed CAN Communication Bus off - 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?






Check for resistance of CAN communication

Check resistance of CAN communication -1
1. IG KEY OFF.
2. Connect ECM, TCM, 4WD, VDC (ABS/TCS), EAS, SAS and CLUSTER connector.
3. Measure resistance between #3 terminal and #11 terminal of "DLC".

Specification : Approx. 60 Ohms








4. Is measured resistance within specifications?





Check resistance of CAN communication -2
1. IG KEY OFF.
2. Disconnect ECM connector.
3. Measure resistance between #3 terminal and #11 terminal of "DLC".

Specification : Approx. 120 Ohms








4. Is measured resistance within specifications?





Check resistance of CAN communication -3
1. IG KEY OFF.
2. Disconnect CLUSTER connector.
3. Measure resistance between #3 terminal and #11 terminal of "DLC".

Specification : Approx. 120 Ohms








4. Is measured resistance within specifications?






Check for short of CAN communication line

Check short of CAN communication line.
1. .IG KEY OFF.
2. Connect TCM, ECM, CLUSTER connector.
3. Measure voltage between TCM CAN HIGH and CAN LOW terminal.

Specification : Approx. 2.3 V








4. Is measured voltage within specifications?





Check open in CAN communication line -1
1. IG KEY OFF.
2. Disconnector TCM, ECM and CLUSTER connector.
3. Measure resistance between TCM CAN HIGH or CAN LOW and CLUSTER CAN HIGH or CAN LOW terminal.

Specification : Approx. 0 Ohms








4. Is measured resistance within specifications?





Check open in CAN communication line -2
1. IG KEY OFF.
2. Disconnector TCM, ECM and CLUSTER connector.
3. Measure resistance between ECM CAN HIGH or CAN LOW and CLUSTER CAN HIGH or CAN LOW terminal.

Specification : Approx. 0 Ohms








4. Is measured resistance within specifications?