Circuit/System Verification
- Verify DTC C05B0 is not set
- If DTC C05B0 is set
- Go to next step: If the DTC is not set
- Perform the Scan Tool Configuration/Reset Functions - Brake System Plunger Motor Position Sensor Learn
- Clear DTCs
- Verify DTC C0021 is not set.
- If the DTC is not set
All OK.
- Go to next step: If DTC C0021 is set
- If the DTC is not set
- Ignition/Vehicle - Off = 10 s - Brake Pedal = Not applied
- Ignition - On / Vehicle - In Service Mode
- Perform the scan tool control function: Brake Hydraulics Test
Perform the scan tool control function: Brake Hydraulics Test
- If the procedure/test does not pass
Refer to: Hydraulic Brake System Bleeding
- Go to next step: If the procedure/test passes
- If the procedure/test does not pass
- Verify DTC C0021 is not set
- If DTC C0021 is set
Replace the component: A104 Brake Master Cylinder
- Go to next step: If the DTC is not set
- If DTC C0021 is set
- All OK.
NOTE:
If the Brake Hydraulics Test still fails after performing the Hydraulic Brake System Bleeding at least 3 times, performing the scan tool control function test Brake System Hydraulics Corner Test can be performed to help isolate the concern.