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.
T2-3-35
