SYSTEM / Electrical System

Parking Brake Circuit

Parking brake switch is changed into OFF from ON after engine starts

• When the key switch is turned to the ON, current from terminal ACC is supplied to the parking brake switch through fuse #9 in the fuse box and charge lamp relay [3].

• In addition, current through fuse #6 in the fuse box is supplied to parking brake relay [1] from parking brake relay [2].

• Power through terminal #b in parking brake relay [2] is supplied to terminal #b in parking brake relay [1] and terminal #4 in the parking brake switch through terminal #a in parking brake relay [2].

• The parking brake switch consists of the three circuits (ON-Neutral-OFF). If turning to the ON, the switch is kept ON. If turning to the OFF, the switch returns to neutral position when releasing the switch.

• When the parking brake switch is turned to the OFF, power through terminal #4 in the parking brake switch is not supplied to terminal #2 in it so that parking brake relay [1] is not excited.

• Power through terminal #b in parking brake relay [1] is supplied to the parking brake solenoid valve through terminal #e in parking brake relay [1].

IMPORTANT: The parking brake cannot be released unless the engine is running.

• Consequently, the parking brake is released as the parking brake solenoid valve is activated.