Circuit/System Verification
WARNING: This page is about a different car, the 2019 Buick Cascada, 2018 Buick Cascada, and 2017 Buick Cascada. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition ON.
- Verify DTC U0128 is not set.
- If the DTC is set
Please Refer to DTC U0100-U02FF
- Go to next step: If the DTC is not set
- If the DTC is set
- Verify the scan tool Park Brake Status parameter changes between Released and Apply while pressing and releasing the S91 Park Brake Control Switch.
- If the parameter does not change
Refer to Circuit/System Test.
- Go to next step: If the parameter changes
- If the parameter does not change
- All OK.