Circuit/System Verification

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2013 GMC Yukon XL, 2013 GMC Yukon, 2013 Chevrolet Suburban, 2013 Chevrolet Avalanche, and 2013 Cadillac Escalade EXT. However, it is still accessible from the selected car via links, so may be relevant.

Ignition ON.
Verify no other DTCs set.
- If any other DTC is set
  Refer to Diagnostic Trouble Code (DTC) List - Vehicle for further diagnosis.
- If no other DTC is set
Verify the scan tool TB Idle Airflow Compensation parameter is less than 90 %.
- 90 % or greater
  Refer to Throttle Body Cleaning .
- If less than 90 %
Engine Idling at the normal operating temperature.

NOTE:

The engine must run for greater than 60 s, then idle at a steady state for an additional 10 s before comparing the actual and desired engine speed parameters.

Verify the actual Engine Speed is not 100 RPM less than the Desired Idle Speed.
- If 100 RPM less than the Desired Idle Speed
  Refer to Circuit/System Testing .
- If 100 RPM greater than the Desired Idle Speed
Verify the actual Engine Speed is not 200 RPM greater than the Desired Idle Speed.
- If 200 RPM greater than the Desired Idle Speed
  Refer to Circuit/System Testing .
- If 200 RPM less than the Desired Idle Speed
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 a DTC does not set.
- If any DTC sets
  Refer to Diagnostic Trouble Code (DTC) List - Vehicle for further diagnosis.
- If no DTCs set
All OK