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

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 network with the ABS module, trailer brake control (TBC) module (if equipped), restraints control module (RCM), supplemental heater control module (diesel engine only, if equipped), transmission control module (TCM) (diesel engine only, if equipped), variable geometry turbocharger (VGT) actuator (diesel engine only) and the instrument cluster. Voltage for the PCM is provided by circuits CBB76 (BU/BN) and SBB36 (GN/RD). Circuit GD113 (BK/YE) provides ground.

This pinpoint test is intended to diagnose the following:
- Fuse
- Wiring, terminals or connectors
- ABS module
- Instrument cluster
- PCM
- Restraints control module (RCM)
- Supplemental heater control module (diesel engine only, if equipped)
- TBC module (if equipped)
- TCM (diesel engine only, if equipped)
- VGT actuator (diesel engine only)

R1-R2:

R3-R4:

R5-R7:

R7 Continued:

R7-R9:

R9-R12:

R12-R15:

R15-R18:

R19-R21:

R21-R24:

R24-R27:

R27-R30:

R31-R34:

R35-R38:

R39: