DTC Troubleshooting: P0113 (10)

DTC P0113:  IAT Sensor Circuit High Voltage

1.Turn the ignition switch ON (II).

2.Check the IAT SENSOR in the DATA LIST with the HDS.

Is about -40 °C (-40 °F) or less, or 4.90 V or higher indicated?


YES - Go to 3.


NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the IAT sensor and 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 SENSOR in the DATA LIST with the HDS.

Is about -40 °C (-40 °F) or less, or 4.90 V or higher indicated?


YES - Go to 8.


NO - Go to 18.

8.Turn the ignition switch OFF.

9.Remove the jumper wire from IAT sensor 2P connector.

10.Turn the ignition switch ON (II).

11.Measure voltage between IAT sensor 2P connector terminal No. 2 and body ground.

 

Is there adout 5 V?


YES - Go to 12.


NO - Go to 17.


12.Turn the ignition switch OFF.

13.Jump the SCS line with the HDS.

14.Disconnect the ECM/PCM connector A (31P).

15.Connect the IAT sensor 2P connector terminal No. 1 to body ground with a jumper wire.

 

16.Check for continuity between ECM/PCM connector terminal A23 and body ground.

 

Is there continuity?


YES - Go to 21.


NO - Repair open in the wire between the ECM/PCM (A23) and IAT sensor, then go to 20.


17.Measure voltage between ECM/PCM connector terminal B17 and body ground.

 

Is there about 5 V?


YES - Repair open in the wire between the ECM/PCM (B17) and the IAT sensor, then go to 20.


NO - Go to 25.

18.Turn the ignition switch OFF.

19.Replace the IAT sensor.

20.Reconnect all connectors.

21.Turn the ignition switch ON (II).

22.Reset the ECM/PCM with the HDS.

23.Do the ECM/PCM idle learn procedure.

24.Check for Temporary DTCs or DTCs with the HDS.

Are any Temporary DTCs or DTCs indicated?


YES - If DTC P0113 is indicated, check for poor connections or loose terminals at the IAT sensor and the ECM, then go to 1. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTCs troubleshooting.


NO - Troubleshooting is complete.n


25.Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM.

26.Check for Temporary DTCs or DTCs with the HDS.

Are any Temporary DTCs or DTCs indicated?


YES - If DTC P0113 is indicated, check for poor connections or loose terminals at the IAT sensor and the ECM/PCM, then go to 1. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.


NO - If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM.n