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

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

C1:

C2-C3:

Normal Operation
The ABS module communicates with the diagnostic tool through the international standards organization (ISO) 9141 communication network circuit 70 (LB/WH). If circuit 70 (LB/WH) becomes open or shorted to ground communications to that module are not possible. Check circuit 70 (LB/WH) between the ABS module C135 and the data link connector (DLC) C251. The total resistance value must not be more than 5 ohms. If the resistance is more than 5 ohms, there is an open in circuit 70 (LB/WH), damage to the DLC C251, or damage to the ABS module C135.

Possible Causes
- ISO 9141 communication network circuit 70 (LB/WH) open
- ABS module C135
- ABS module