Test B: The Anti-Lock Brake System (ABS) Module Does Not Respond To The Scan Tool

PINPOINT TEST B: THE ANTI-LOCK BRAKE SYSTEM (ABS) MODULE DOES NOT RESPOND TO THE SCAN TOOL

Normal Operation - Escape and Mariner
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, the four wheel drive (4WD) control module, the instrument cluster, the restraints control module (RCM), the power steering control module and the occupant classification sensor module. Voltage for the ABS module is provided by circuits CBP34 (VT/BN), SBB09 (RD) and SBB18 (YE/RD). Ground is provided by circuit GD120 (BK/GN).

Normal Operation - Hybrid
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, the instrument cluster, the restraints control module (RCM), the power steering control module, the transmission control module, the traction battery control module (TBCM) and the occupant classification sensor module. Voltage for the ABS module is provided by circuits CBP34 (VT/BN), SBB06 (BN/RD), SBB09 (RD) and SBB18 (YE/RD). Ground is provided by circuit GD113 (BK/YE) and GD179 (BK/VT).

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

B1-B2:

B2-B3:

B4-B5: