Test Y: Intermittent No High Speed Controller Area Network (HS-CAN) Communication, One Or More Modules Are Not Responding Durin

PINPOINT TEST Y: INTERMITTENT NO HIGH SPEED CONTROLLER AREA NETWORK (HS-CAN) COMMUNICATION, ONE OR MORE MODULES ARE NOT RESPONDING DURING NETWORK TEST

Normal Operation
The HS-CAN uses an unshielded twisted pair cable, circuits VDB04 (WH/BU) and VDB05 (WH). The PCM, the transmission control module (TCM), the ABS module, the restraints control module (RCM), the 4X4 control module (if equipped), the air suspension module (if equipped) and the instrument cluster (IC) all communicate with the scan tool using the HS-CAN.

In the event that one 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.

This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors

Y1:

Y1-Y2:

Y3-Y6:

Y7-Y13: