Performing the Automated Bleed Procedure
- Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
- Remove all four tire and wheel assemblies. Refer to Tire and Wheel Removal and Installation (5 Lug Wheel) or Tire and Wheel Removal and Installation (4 Lug wheel) in Tires and Wheels.
- Inspect the brake system for leaks and visual damage. Refer to Symptoms - Hydraulic Brakes in Hydraulic Brakes. Repair or replace components as needed.
- Lower the vehicle.
- Inspect the battery state of charge. Refer to Battery Inspection/Test in Engine Electrical.
- Install a scan tool.
- Turn the ignition ON, with the engine OFF.
- With the scan tool, establish communications with the ABS system. Select Special Functions. Select Automated Bleed from the Special Functions menu.
- Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
- Following the directions given on the scan tool, pressure bleed the base brake system. Refer to Hydraulic Brake System Bleeding (Manual) or Hydraulic Brake System Bleeding (Pressure) in Hydraulic Brakes.
- Follow the scan tool directions until the desired brake pedal height is achieved.
- If the bleed procedure is aborted, a malfunction exists. Perform the following steps before resuming the bleed procedure:
- If a DTC is detected, refer to Diagnostic Trouble Code (DTC) List - Vehicle in Vehicle DTC Information and diagnose the appropriate DTC.
- If the brake pedal feels spongy, perform the conventional brake bleed procedure again. Refer to Hydraulic Brake System Bleeding (Manual)Hydraulic Brake System Bleeding (Pressure) in Hydraulic Brakes.
- 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 (5 Lug Wheel) or Tire and Wheel Removal and Installation (4 Lug wheel) in Tires and Wheels.
- Inspect the brake fluid level. Refer to Master Cylinder Reservoir Filling in Hydraulic Brakes.
- Road test the vehicle while inspecting that the pedal remains high and firm.