Circuit/System Verification
WARNING: This page is about a different car, the 2022 Cadillac CT4. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition - On / Vehicle - In Service Mode
- Verify DTC C0049 is not set.
- If the DTC is set
- Go to next step: If the DTC is not set
- Test or inspect for the following: Brake System Malfunction
Refer to: Disc Brake System Diagnosis
- Perform the scan tool control function: Brake Hydraulics Test
- Verify DTC C0594 is not set.
- If the DTC is 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 is set
- All OK.