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

B1-B2:

B3-B4:

Normal Operation
The ABS module communicates with the scan tool through the high speed controller area network (HS-CAN). Circuits 1827 (WH/LG) (HS-CAN +) and 1828 (PK/LG) (HS-CAN -) provide the network connection to the ABS module. The ABS module shares the HS-CAN network with the powertrain control module (PCM) and the instrument cluster. Voltage for the ABS module is provided by circuits 295 (LB/PK), 532 (OG/YE) and 534 (YE/LG). Ground is provided by circuit 530 (LG/YE).

Possible Causes
- Fuse
- Circuit 295 (LB/PK) open
- Circuit 530 (LG/YE) open
- Circuit 532 (OG/YE) open
- Circuit 534 (YE/LG) open
- Circuit 1827 (WH/LG) open (HS-CAN +)
- Circuit 1828 (PK/LG) open (HS-CAN -)
- ABS module