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Test B: The Anti-Lock Brake System (ABS) Module With Roll Stability Control Does Not Respond to the Scan Tool

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


B1-B3:






B3-B4:






B5:






NOTE: Only vehicles equipped with roll stability control will communicate on the high speed controller area network (HS-CAN). Standard ABS module vehicles without roll stability control will communicate on the International Standards Organization (ISO) network.

Normal Operation
The ABS module communicates with the scan tool through the 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 circuit 640 (RD/YE). Circuit 530 (LG/YE) provides ground.

Possible Causes
- Fuse
- Circuit 530 (LG/YE) open
- Circuit 640 (RD/YE) open
- Circuit 1827 (WH/LG) open (HS-CAN +)
- Circuit 1828 (PK/LG) open (HS-CAN -)
- ABS module
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