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)