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-B3:

B3-B4:

Normal Operation
The ABS module communicates with the scan tool through the high speed controller area network (HS-CAN). Circuits 1908 (WH) (HS-CAN +) and 1909 (BK) (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 483 (RD), 534 (YE/LG) and 601 (LB/PK) and ground is provided by circuit 1205 (BK).

DTC U0073 (ABS module) - sets when the HS-CAN bus performance is compromised.

Possible Causes
- Fuse
- Circuit 483 (RD) open
- Circuit 534 (YE/LG) open
- Circuit 601 (LB/PK) open
- Circuit 1205 (BK) open
- Circuit 1908 (WH) open (HS-CAN +)
- Circuit 1909 (BK) open (HS-CAN -)
- ABS module