Circuit/System Verification
WARNING: This page is about a different variant/trim than selected.
- Ignition ON.
- Verify that DTC P0641, P0651, P0697, or P06A3 is not set.
- If any of the DTCs are set
Refer to DTC P0641, P0651, P0697, or P06A3 (ECM) for further diagnosis.
- Go to next step: If none of the DTCs are set
- If any of the DTCs are set
- If you were sent here from DTC P0068, P0101, P0121, P0236, or P1101 refer to Circuit/System Testing.
- Verify the scan tool Throttle Body Idle Airflow Compensation parameter is less than 90%.
- If 90% or greater
Refer to Throttle Body Cleaning .
- Go to next step: If less than 90%
- If 90% or greater
- Verify the scan tool Throttle Body Sensors 1 and 2 Agree/Disagree parameter displays Agree while performing the Throttle Sweep Test with a scan tool.
- If Disagree
Refer to DTC P0121-P0123, P0222, P0223, P16A0-P16A2, or P2135 for further diagnosis.
- Go to next step: If Agree
- If Disagree
- Determine the current vehicle testing altitude.
- Verify the scan tool MAP Sensor pressure parameter is within the range specified in the Altitude Versus Barometric Pressure
table.
- If the MAP Sensor parameter is not in range
Refer to Circuit/System Testing.
- Go to next step: If the MAP Sensor parameter is in range
- If the MAP Sensor parameter is not in range
- Engine idling.
- Verify the scan tool MAP Sensor pressure parameter is between 26 - 52 kPa (3.8 - 7.5 PSI) and changes with accelerator pedal input.
- If not between 26 - 52 kPa (3.8 - 7.5 PSI) or does not change
Refer to Circuit/System Testing.
- Go to next step: If between 26 - 52 kPa (3.8 - 7.5 PSI) and changes
- If not between 26 - 52 kPa (3.8 - 7.5 PSI) or does not change
- 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.
- Engine idling
- Perform the scan tool snapshot function.
- Increase the engine speed slowly to 3000 RPM and then back to idle.
- Exit from the scan tool snapshot and review the data.
- Observe the MAF Sensor parameter frame by frame with a scan tool.
- The MAF Sensor parameter does not change smoothly and gradually
Refer to DTC P0101 for further diagnosis.
- Go to next step: 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 a DTC does not set.
- If the DTC sets
Refer to Circuit/System Testing.
- Go to next step: If the DTC does not set
- If the DTC sets
- All OK.