A: No Communication With the Anti-Lock Brake Control Module
Test A: No Communication With the Anti-Lock Brake System (ABS) ModuleNormal Operation
The operating voltage required to supply the ABS module, hydraulic pump and isolation valves is between 10 and 17 volts. The ignition voltage is supplied through circuit 677 (LB) and the battery voltage is supplied through circuit 483 (RD) to the ABS module. Ground is provided through circuit 570 (BK/WH).
Possible Causes
^ Circuit 570 (BK/WH) open
^ Circuit 483 (RD) open
^ Circuit 677 (LB) open
A1-A2:
