DTC Troubleshooting: P0113 (10-2)

DTC P0113 (10-2):  IAT Sensor Circuit High Voltage

1.Turn the ignition switch ON (II).

2.Check the IAT with the HDS or the scan tool.

Is -20°C (-4°F) or less, or about 5 V indicated?


YES - Go to 3.


NO - Intermitent failure, system is OK at this time. Check for poor connections or loose terminals at the IAT sensor and at the ECM/PCM.n


3.Turn the ignition switch OFF.

4.Disconnect the IAT sensor 2P connector.

5.Connect the IAT sensor 2P connector terminals No. 1 and No. 2 with a jumper wire.

 

6.Turn the ignition switch ON (II).

7.Check the IAT with the HDS or the scan tool.

Is -20°C (-4°F) or less, or about 5 V indicated?


YES - Go to 8.


NO - Replace the  IAT sensor.n


8.Turn the ignition switch OFF.

9.Remove the jumper wire.

10.Connect ECM/PCM connector terminals A10 and B17 with a jumper wire.

 

11.Turn the ignition switch ON (II).

12.Check the IAT with the HDS or the scan tool.

Is -20°C (-4°F) or less, or about 5 V indicated?


YES - Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM, then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original  ECM/ PCM.n


NO - Repair open in the wire between the ECM/PCM (A10, B17) and the IAT sensor.n