Circuit/System Verification

WARNING: This page is about a different variant/trim than selected.

Ignition ON.
Verify DTC P0121, P0122, P0123, P0222, P0223, P0562, P0621, P0622 or P2135 is not set.
NOTE: A low battery voltage or charging system condition may cause a DTC to set.
- If any of the DTCs are set
  Refer to Diagnostic Trouble Code (DTC) List - Vehicle for further diagnosis.
- If none of the DTCs are set
Verify the scan tool Throttle Body Idle Air flow Compensation parameter is less than 90%.
- If 90% or greater
  Refer to Throttle Body Inspection and Cleaning .
- If less than 90%
Clear the DTCs with a scan tool.
Ignition OFF and all vehicle systems OFF. It may take up to 2 minutes for all vehicle systems to power down.
Ignition ON.
Verify the scan tool TAC Motor parameter displays Enabled while slowly depressing the accelerator pedal.
- If Enabled is not displayed
  Refer to Circuit/System Testing.
- If Enabled is displayed
Verify DTC P1516, P2101, P2119 or P2176 is not set.
- If any of the DTCs are set
  Refer to Circuit/System Testing.
- If none of the DTCs are set
Verify the scan tool TAC Motor parameter displays Enabled while performing the Throttle Sweep Test with a scan tool.
NOTE: If there is a condition with the throttle body, the TAC Motor Command parameter will go to 99% for a predetermined amount of time and then a DTC sets. Once a DTC is set, the TAC Motor Command parameter will go to 0% and the TAC Motor parameter will display Disabled.
- If Enabled is not displayed
  Replace the Q38 Throttle Body.
- If Enabled is displayed
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.
- If the DTC does not set
All OK.