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

PINPOINT TEST R: NO HIGH SPEED CONTROLLER AREA NETWORK (HS-CAN) COMMUNICATION, ALL MODULES ARE NOT RESPONDING

R1-R2:

R3-R4:

R5-R6:

R7-R8:

R8-R9:

R10-R11:

R12-R15:

R15-R17:

R17-R19:

R19-R21:

R21-R24:

R24-R26:

R26-R28:

R29-R32:

R33:

Normal Operation
The HS-CAN uses an unshielded twisted pair cable, circuits VDB04 (WH/BU) and VDB05 (WH). The powertrain control module (PCM), the transmission control module (TCM), the anti-lock brake system (ABS) module, the restraints control module (RCM), the four wheel drive (4WD) control module (if equipped), the occupant classification sensor module and the instrument cluster all communicate with the scan tool using the HS-CAN.

Possible Causes
- Circuit VDB04 (WH/BU) open, short to ground or voltage (HS-CAN +)
- Circuit VDB05 (WH) open, short to ground or voltage (HS-CAN -)
- Circuit VDB04 (WH/BU) (HS-CAN +) and circuit VDB05 (WH) (HS-CAN -) shorted together
- PCM
- ABS module
- TCM
- 4WD control module (if equipped)
- Instrument cluster
- Occupant classification sensor module
- RCM