Circuit/System Verification
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2018 GMC Yukon XL, 2018 GMC Yukon, 2018 Chevrolet Tahoe, 2018 Chevrolet Suburban, and 2018 Cadillac Escalade ESV. However, it is still accessible from the selected car via links, so may be relevant.
- Verify that DTC U0077 or U0126 is not set.
- If DTC U0077 or U0126 is set
Refer to Diagnostic Trouble Code (DTC) List - Vehicle .
- Go to next step: If DTC U0077 or U0126 is not set
- If DTC U0077 or U0126 is set
- Verify the scan tool Steering Wheel Angle parameter value constantly changes from +550 to -550° as the steering wheel is turned through its entire range from left to right.
- If the parameter does not constantly change with the steering wheel position or the reading is erratic
Refer to Circuit/System Testing below.
- Go to next step: If the parameter constantly changes with the steering wheel position
- If the parameter does not constantly change with the steering wheel position or the reading is erratic
- All OK.