Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).
- Check for poor connections or loose terminals at ECT sensor 1, ECT sensor 2, and the MAF sensor/IAT sensor. Are the connections and terminals OK? YES -Go to step 2. NO -Repair the connections or terminals, then go to step 15 .
- Remove the MAF sensor/IAT sensor (see «MAF SENSOR/IAT SENSOR REPLACEMENT»(ref-513153-S30292750782012110700000) ).
- Allow the MAF sensor/IAT sensor to cool to the ambient temperature.
- Note the ambient temperature.
- Connect the MAF sensor/IAT sensor to its 5P connector, but do not install it.
- Turn the ignition switch to ON (II).
- Note the value of the IAT SENSOR (2) quickly in the DATA LIST with the HDS.
- Compare the value of the IAT SENSOR (2) and the ambient temperature. Does the value of the IAT SENSOR (2) differ 5.4°F (3°C) or more from the ambient temperature? YES -Go to step 13 . NO -Go to step 9.
- Disconnect the MAF sensor/IAT sensor from its 5P connector.
- Using a heat gun, blow hot air on the MAF sensor/IAT sensor for a few seconds. Do not apply the heat longer than a few seconds or you will damage the sensor.
- Connect the MAF sensor/IAT sensor to its 5P connector, but do not install it.
- Check the IAT SENSOR (2) in the DATA LIST with the HDS. Does the IAT SENSOR (2) change 72°F (40°C) or more? YES -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the MAF sensor/IAT sensor and the PCM. NO -Go to step 13.
- Turn the ignition switch to LOCK (0).
- Replace the MAF sensor/IAT sensor (see «MAF SENSOR/IAT SENSOR REPLACEMENT»(ref-513153-S30292750782012110700000) ).
- Turn the ignition switch to ON (II).
- Reset the PCM with the HDS.
- Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(ref-513173-S16164063582012110700000) ).
- Check for Pending or Confirmed DTCs with the HDS. Is DTC P0111 indicated? YES -Check for poor connections or loose terminals at the MAF sensor/IAT sensor and the PCM, then go to step 1 . NO -Troubleshooting is complete. If any other Pending or Confirmed DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(ref-513153-S06499438282012110700000) .