Test F: Poor Vehicle Tracking During Anti-Lock Function

Pinpoint Test F: Poor Vehicle Tracking During Anti-Lock Function
Refer to Vehicle/Diagrams, Vehicle Dynamic Systems for schematic and connector information.

Normal Operation
Fused battery voltage is provided to the ABS module from battery junction box (BJB) fuses 109 (20A) and 106 (40A) along circuits 483 (RD) and 601 (LB/PK) respectively. Fused ignition voltage is provided from central junction box (CJB) fuse 13 (10A) along circuit 1003 (GY/YE). When necessary, the ABS module supplies voltage to the hydraulic control unit (HCU) assembly and the pump motor is activated. The ABS module is provided a ground along circuit 57 (BK) and the hydraulic pump motor is provided a ground internally through the HCU.

This pinpoint test is intended to diagnose the following:
^ Base brake system
^ HCU assembly
^ Circuit shorted

F1-F5:

F6-F11: