Circuit/System Verification
- Ignition - On/Vehicle - In Service Mode
- Perform the scan tool control function: Deactivate Brake Boost System
- Verify there are no leaks in the component/system: Brake System - Refer to: Brake Fluid Loss
- Apply the brake pedal. - More than 2 times.
- Perform the scan tool control function: Brake Hydraulics Test
- If the procedure/test does not pass
Refer to: Hydraulic Brake System Bleeding (Manual)
- Go to next step: If the procedure/test passes
- If the procedure/test does not pass
- Ignition/Vehicle - Off - For greater than 10 min
- Ignition/Vehicle - On - For greater than 15 s - Brake Pedal Not Applied
- Apply and hold the brake pedal. - Hard - For greater than 120 s
- Release the brake pedal.
- Verify DTC C2A20 is not set
- If DTC C2A20 is set
Test or replace the component: A104Brake Master Cylinder
- Go to next step: If the DTC is not set
- If DTC C2A20 is set
- All OK.