Circuit/System Verification
- Ignition/Vehicle - Off
- Verify there are no leaks in the component/system: Brake System - Refer to:Brake Fluid Loss (LGX)
- Ignition - On / Vehicle - In Service Mode & Brake Pedal Not Applied - Greater than 30 s
- Perform the scan tool control function: Brake Hydraulics Test
- If the procedure/test does not pass
Bleed the brake system. Refer to:Hydraulic Brake System Bleeding (Manual with LGX) Hydraulic Brake System Bleeding (Pressure with LGX) Hydraulic Brake System Bleeding (Pressure with LTA)
- Go to next step: If the procedure/test passes
- If the procedure/test does not pass
- Ignition/Vehicle - Off
- Ignition - On / Vehicle - In Service Mode
- Verify DTC C055F is not set.
- If the DTC sets
Replace the component: A104 Brake Master Cylinder
- Go to next step: If the DTC is not set
- If the DTC sets
- All OK.