Chevrolet Sonic manuals
 

Chevrolet Sonic Repair Manual: Antilock Brake System Automated Bleed

Chevrolet Sonic Repair Manual / Chassis / Brake Control and Vehicle Dynamics / Dynamics Control / Antilock Brake System Automated Bleed

Warning:

Refer to Brake Fluid Irritant Warning.

Caution:

Refer to Brake Fluid Effects on Paint and Electrical Components Caution.

Note:

Before performing the Antilock Brake System (ABS) Automated Bleed Procedure, first perform a pressure bleed of the base brake system. Refer to Hydraulic Brake System Bleeding. The automated bleed procedure is recommended when one of the following conditions exists:

  • Base brake system bleeding does not achieve the desired pedal height or feel.
  • Extreme loss of brake fluid has occurred.
  • Air ingestion is suspected in the secondary circuits of the hydraulic brake modulator assembly.

The ABS Automated Bleed Procedure uses a scan tool to cycle the system solenoid valves and run the pump in order to purge any air from the secondary circuits. These circuits are normally closed off and are only opened during system initialization at vehicle start up and during ABS operation. The automated bleed procedure opens these secondary circuits and allows any air trapped in these circuits to flow out toward the brake calipers.

Caution:

The Auto Bleed Procedure may be terminated at any time during the process by pressing the EXIT button. No further Scan Tool prompts pertaining to the Auto Bleed procedure will be given. After exiting the bleed procedure, relieve bleed pressure and disconnect bleed equipment per manufacturers instructions. Failure to properly relieve pressure may result in spilled brake fluid causing damage to components and painted surfaces.

  1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle.
  2. Remove all four tire and wheel assemblies. Refer to Tire and Wheel Removal and Installation.
  3. Inspect the brake system for leaks and visual damage. Refer to Symptoms - Hydraulic Brakes, repair or replace components as needed.
  4. Lower the vehicle.
  5. Inspect the battery state of charge. Refer to Battery Inspection/Test.
  6. Install a scan tool.
  7. Turn the ignition ON, with the engine OFF.
  8. With the scan tool, establish communications with the ABS system. Select Control Functions. Select Automated Bleed from the Control Functions menu.
  9. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle.
  10. Following the directions given on the scan tool, pressure bleed the base brake system. Refer to Hydraulic Brake System Bleeding.
  11. Follow the scan tool directions until the desired brake pedal height is achieved.
  12. If the bleed procedure is aborted, a malfunction exists. Perform the following steps before resuming the bleed procedure:
  • When the desired pedal height is achieved, press the brake pedal to inspect for firmness.
  • Lower the vehicle.
  • Remove the scan tool.
  • Install the tire and wheel assemblies. Refer to Tire and Wheel Removal and Installation.
  • Inspect the brake fluid level. Refer to Master Cylinder Reservoir Filling.
  • Road test the vehicle while inspecting that the pedal remains high and firm.
    • ABS Description and Operation
    This vehicle is equipped with the MGH 60 Mando electronic stability control antilock brake system. The electronic brake control module and the brake pressure modulator are serviced sep ...

    Brake Pressure Modulator Valve Bracket Replacement
    Removal Procedure Remove the brake pressure modulator valve (BPMV) and bracket assembly. Refer to Brake Pressure Modulator Valve Replacement. Remove the BPMV boltsR ...

    Other materials:

    Turning the System On or Off
    /VOL (Power/Volume): Press to turn the system on and off. Automatic Switch-Off If the infotainment system is on after the ignition is turned off, the system will turn off automatically after 10 minutes. Volume Control /VOL (Power/Volume): Turn to adjust the volume. (Phone/Mute): For ve ...

    Event Data Recorders
    This vehicle is equipped with an event data recorder (EDR). The main purpose of an EDR is to record, in certain crash or near crash-like situations, such as an air bag deployment or hitting a road obstacle, data that will assist in understanding how a vehicle’s systems performed. The EDR is ...

    Air Intake System Description
    Circuit/System Description The primary function of the air intake system is to provide filtered air to the engine. The system uses a filter element mounted in a housing. The filter housing is remotely mounted and uses intake ducts to route the incoming air into the throttle body. T ...

    © 2014-2025 Copyright www.csmans.com
     
    0.0088