Chevrolet Sonic manuals

Chevrolet Sonic Repair Manual: Park Brake System Description and Operation

Chevrolet Sonic Repair Manual / Chassis / Brakes / Parking Brake / Park Brake System Description and Operation

System Component Description

The park brake system consists of the following:

Park Brake Lever Assembly

Receives, multiplies, and transfers park brake system apply input force from driver to park brake cable system.

Releases applied park brake system when lever release button is depressed and lever is returned to the at rest position.

Park Brake Cables

Transfers input force received from park brake lever, through park brake cable equalizer, to park brake apply lever.

Park Brake Cable Equalizer

Evenly distributes input force to both the left and right park brake units.

Threaded front park brake cable adjuster is also used to remove slack in park brake cables.

Park Brake Apply Lever

Multiplies and transfers input force to park brake actuator/adjuster.

Park Brake Actuator/Adjuster

Uses multiplied input force from apply lever to expand drum brake shoes toward the friction surface of the brake drum.

Threaded park brake actuators/adjusters are also used to control clearance between the drum brake shoes and the friction surface of the brake drum.

System Operation

Park brake apply input force is received by the park brake lever assembly being applied. The input force is multiplied by the lever assembly, transferred and evenly distributed, through the park brake cables and the park brake cable equalizer, to the left and right park brake apply levers. The park brake apply levers multiply and transfer the apply input force to the park brake actuators/adjusters which expand the drum brake shoes toward the friction surface of the brake drum in order to prevent the rotation of the rear tire and wheel assemblies. The park brake lever assembly releases an applied park brake system when it is released and returned to the at rest position.

Park Brake Hardware Inspection
Warning: Refer to Brake Dust Warning. Visually inspect the park brake lever (1) and the lever pivot pin (2) for the following conditions: The lever being bent ...

Park Brake and P (Park) Mechanism Check
Warning: When you are doing this check, the vehicle could begin to move. You or others could be injured and property could be damaged. Make sure there is room in front of the vehicle in case ...

Other materials:

Antilock Brake System (ABS)
This vehicle has ABS, an advanced electronic braking system that helps prevent a braking skid. When the vehicle begins to drive away, ABS checks itself. A momentary motor or clicking noise might be heard while this test is going on, and it might even be noticed that the brake pedal moves a lit ...

Turning the Systems Off and On
The button for TCS and StabiliTrak is on the center console. Caution Do not repeatedly brake or accelerate heavily when TCS is off. The vehicle driveline could be damaged. To turn off only TCS, press and release the button. The traction off light displays in the instrument cluster. To tu ...

Airbag Side Impact Sensor Replacement (with AYF/AYO)
Airbag Side Impact Sensor Replacement Callout Component Name Warning: Refer to SIR Warning. Warning: Refer to SIR Inflator Module Handling and Storage Warning. Warning: Following the deployment o ...

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