Pinpoint Test U: No High Speed Controller Area Network (HS-CAN) Communication, All Modules Are Not Responding

Communications Network


Pinpoint Test U: No High Speed Controller Area Network (HS-CAN) Communication, All Modules Are Not Responding

Refer to Wiring Diagram Set 14, Module Communications Network for schematic and connector information. Diagrams By Number

Normal Operation

The High Speed Controller Area Network (HS-CAN) uses an unshielded twisted pair cable, circuits VDB04 (WH/BU) and VDB05 (WH).

This pinpoint test is intended to diagnose the following:

- Wiring, terminals or connectors
- 4X4 control module
- ABS module
- Accessory Protocol Interface Module (APIM)
- Trailer Brake Control (TBC) module
- Instrument Cluster (IC)
- Occupant Classification System Module (OCSM)
- PCM
- Restraints Control Module (RCM)
- Transmission Control Module (TCM)



PINPOINT TEST U: NO HS-CAN COMMUNICATION, ALL MODULES ARE NOT RESPONDING

NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

NOTE: Most faults are due to connector and/or wiring concerns. Carry out a thorough inspection and verification before proceeding with the pinpoint test. Inspection and Verification

NOTE: Failure to disconnect the battery when instructed will result in false resistance readings. Refer to Battery.

U1-U3:

U4-U7:

U7-U8:

U8-U10:

U10-U12:

U12-U15:

U15-U18:

U18-U21:

U21-U23:

U24-U26:

U26-U29:

U29-U34:

U34-U37: