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

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

D1-D2:

D3-D4:

Normal Operation
The ABS module with roll stability control (RSC), communicates with the diagnostic tool through the controller area network (CAN), circuits 1827 (WH/LG) and 1828 (PK/LG). Standard ABS equipped vehicles communicate with the diagnostic tool through the international standards organization (ISO) 9141 communications network, circuit 70 (LB/WH). Check either CAN circuits 1827 (WH/LG) and 1828 (PK/LG) or ISO 9141, circuit 70 (LB/WH) between the ABS module C135 (ABS only) or C149 (ABS with RSC) and the data link connector (DLC) C251. The total resistance values must not be more than 5 ohms. If the resistance is more than 5 ohms there is an open in one of the CAN circuits, damage to the DLC C251, damage to the ABS module C135 (ABS only) or C149 (ABS with RSC), or a problem in an in-line connector.

Possible Causes
- CAN circuit 1827 (WH/LG) open (ABS with RSC)
- CAN circuit 1828 (PK/LG) open (ABS with RSC)
- ISO 9141 circuit 70 (LB/WH) open (ABS only)
- ABS module