Test B: The ABS Module Does Not Respond To The Scan Tool

PINPOINT TEST B: THE ABS MODULE DOES NOT RESPOND TO THE SCAN TOOL

Normal Operation
The ABS module 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 ABS module. The ABS module shares the HS-CAN network with the PCM, trailer brake control (TBC) module (if equipped), instrument cluster, restraints control module (RCM), transmission control module (TCM) (diesel engine only, if equipped), variable geometry turbocharger (VGT) actuator (diesel engine only) and the supplemental heater control module (diesel engine only, if equipped). Voltage for the ABS module is provided by circuits CBP34 (VT/BN), SBB09 (RD) and SBB18 (YE/RD). Ground is provided by circuit GD163 (BK/GY).

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

B1-B2:

B2-B3:

B4: