Circuit/System Verification

Engine idling, verify the scan tool MAF Sensor parameter is between 1.75-5.5 g/s.
- If not between 1.75-5.5 g/s
  Refer to Circuit/System Testing .
- If between 1.75-5.5 g/s
Verify the scan tool MAF Sensor g/s parameter changes smoothly and gradually as the engine speed is increased and decreased while performing the actions listed below.
1. Engine idling
2. Perform the scan tool snapshot function.
3. Increase the engine speed slowly to 3, 000 RPM and then back to idle.
4. Exit from the scan tool snapshot and review the data.
5. Observe the MAF Sensor parameter frame by frame with a scan tool.
- If the MAF Sensor parameter does not change smoothly and gradually
  Refer to Circuit/System Testing .
- If the MAF Sensor parameter changes smoothly and gradually
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 does set
  Refer to Circuit/System Testing for further diagnosis.
- If the DTC does not set
All OK