Pinpoint Test T: Intermittent No HS-CAN Communication, One Or More Module Are Not Responding During Network Test
Communications Network
Pinpoint Test T: Intermittent No High Speed Controller Area Network (HS-CAN) Communication, One Or More Modules Are Not Responding During Network Test
Normal Operation
The High Speed Controller Area Network (HS-CAN) uses an unshielded twisted pair cable, circuits VDB04 (WH/BU) and VDB05 (WH). In the event that 1 of the 2 network circuits (HS-CAN + or HS-CAN -) becomes open to a module on the network, unreliable network communication to all modules on the network may result.
The following modules communicate with the scan tool using the HS-CAN:
- 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)
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
PINPOINT TEST T: INTERMITTENT NO HS-CAN COMMUNICATION, ONE OR MORE MODULES ARE NOT RESPONDING DURING NETWORK TEST
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: Various network DTCs set while disabling modules in this test procedure which need to be cleared after the diagnostic procedure is completed.
NOTE: Failure to disconnect the battery when instructed will result in false resistance readings. Refer to Battery.
