A: No Communication With the Anti-Lock Brake Control Module
Pinpoint Test A: No Communication With the Antilock Brake System (ABS) ModuleTest A1:
Test A1-A2:
Normal Operation
The operating voltage required to supply the ABS module, hydraulic pump, and isolation valves is in a range between 10 and 16 volts.
Voltage is supplied by the smart junction box (SIB) through circuit 1844 (LG/RD) (ignition feed) and the bussed electrical center (BEC) through circuit 601 (LB/PK) (voltage at all times). Ground is provided through circuit 1205 (BK).
Possible Causes
^ circuit 601 (LB/PK) open
^ circuit 1205 (BK) open
^ circuit 1844 (LG/RD) open
^ ABS module
CAUTION: Use the flex probe kit for all test connections to prevent damage to the wiring terminals. Do not use standard multimeter arches.