J: Poor Vehicle Tracking During Antilock Function

Pinpoint Test J: Poor Vehicle Tracking During Anti-Lock Function

Normal Operation

The operating voltage required to supply the anti-lock brake system (ABS) module, hydraulic pump, and isolation valves is in a range between 10 and 16 volts.

Voltage is supplied by circuit 532 (OG/YE) (ignition feed), circuit 534 (YE/LG) and circuit 685 (BK/WH) (hot at all times). Ground is provided through circuit 1203 (BK/LB) and circuit 1205 (BK).

Possible Causes

- base brake system
- hydraulic control unit (HCU)