Test F: Poor Vehicle Tracking During Anti-Lock Function

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

Normal Operation
The operating voltage required for ABS module, hydraulic pump and isolation valve operation is in a range between 10 and 16 volts.

Fused battery voltage is supplied to the ABS module by battery junction box (BJB) fuse 9 (40A) along circuit SBB09 (RD) and by BJB fuse 12 (20A) along circuit SBB12 (GN/RD). Fused ignition voltage is supplied to the ABS module by BJB fuse 38 (10A) along circuit CBB38 (GY/BU). Ground is provided along circuit GD120 (BK/GN).

This pinpoint test is intended to diagnose the following:
^ Base brake system
^ Hydraulic control unit (HCU)

F1-F4:

F5: