Pinpoint Test 18: Intermittent No High Speed Controller Area Network (HS-CAN) Communication, Communication Can Be Intermittentl

PINPOINT TEST 18: INTERMITTENT NO HIGH SPEED CONTROLLER AREA NETWORK (HS-CAN) COMMUNICATION, COMMUNICATION CAN BE INTERMITTENTLY ESTABLISHED

Normal Operation

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

Possible Causes
- 4X4 control module (if equipped)
- ABS module
- Accessory Protocol Interface Module (APIM)
- Instrument Cluster (IC)
- Occupant Classification System Module (OCSM)
- PCM
- Power Steering Control Module (PSCM)
- Restraints Control Module (RCM)

Diagnostic Procedure

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