Test A: The PCM Does Not Respond To The Scan Tool Or No High Speed Controller Area Network (HS-CAN) Communication

PINPOINT TEST A: THE PCM DOES NOT RESPOND TO THE SCAN TOOL OR NO HIGH SPEED CONTROLLER AREA NETWORK (HS-CAN) COMMUNICATION

Normal Operation
The PCM communicates with the scan tool through the high speed controller area network (HS-CAN). Circuits VDB04 (WH/BU) (HS-CAN +) and VDB05 (WH) (HS-CAN -) provide the network connection to the PCM. The PCM shares the HS-CAN with the 4X4 control module, the restraints control module (RCM), the occupant classification system module (OCSM), the SJB, and the instrument cluster (IC). Circuits CBB39 (VT/WH) and SBB21 (GY/RD) provide voltage, and redundant circuit GD108 (BK/VT) provides ground.

This pinpoint test is intended to diagnose the following:
- Fuse
- Wiring, terminals or connectors
- PCM
- RCM
- Occupant classification system module (OCSM)
- 4X4 control module
- IC
- SJB

A1-A2:

A2-A4:

A5-A8:

A8-A10:

A10-A12:

A12-A14:

A14-A16:

A16-A18:

A18-A20:

A20-A22:

A23-A27: