Circuit/System Verification
WARNING: This page is about a different car, the 2018 GMC Yukon XL, 2018 GMC Yukon, 2018 Chevrolet Tahoe, 2018 Cadillac Escalade ESV, and 2018 Cadillac Escalade. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition - On / Vehicle - In Service Mode
- Verify the scan tool parameter: 9V Reference 1 Circuit Status = OK
- If not the specified state
Refer to Circuit/System Testing
- Go to next step: If the specified state
- If not the specified state
- Engine - Running
- Transmission - Park
- Verify the scan tool parameter: Transmission ISS = Engine Speed. - The value should change smoothly and gradually as the engine speed is increased and decreased.
- If not the specified value
Refer to Circuit/System Testing below
- Go to next step: If the specified value
- If not the specified value
- Drive Wheels - Blocked
- Parking Brake - - - - (03)
- Transmission - Reverse
- Verify the scan tool parameter: Transmission ISS = 0 RPM
- If not the specified state
Refer to Circuit/System Testing below
- Go to next step: If the specified state
- If not the specified state
- Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
Verify the DTC does not set.
- If the DTC sets
Refer to Circuit/System Testing below
- Go to next step: If the DTC is not set
- If the DTC sets
- All OK.