Valve Solenoid/Pressure Reduction

The pressure reduction test activates the hydraulic wheel circuit valve, placing it in the pressure reduce position. In that position, the valve allows caliper pressure to return to the master cylinder. During this test the wheel should be moveable with brake pressure applied.

1. With ignition switch in Off position.
2. Connect Tech 1 scan tool with appropriate brake cartridge.
3. Turn ignition switch to On position.
4. Raise and support vehicle with wheels about six inches from floor.
5. Have an assistant depress brake pedal.
6. Select valve solenoid test, then depress Tech 1 tool RELEASE PRESSURE.
7. Depress brake pedal, turn rear wheel, movement should be indicated.