| 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 MAF sensor/IAT sensor 5P connector. |
| 5. | Connect MAF sensor/IAT sensor 5P connector terminals No. 4 and No. 5 with a jumper wire.
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| 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 20 |
| 8. | Turn the ignition switch OFF. |
| 9. | Remove the jumper wire from the MAF sensor/IAT sensor 5P connector. |
| 10. | Turn the ignition switch ON (II). |
| 11. | Measure voltage between MAF sensor/IAT sensor 5P connector terminal No. 5 and body ground.
Is there about 5 V? YES - Go to 12. NO - Go to 16. |
| 12. | Turn the ignition switch OFF. |
| 13. | Jump the SCS line with the HDS. |
| 14. | Disconnect ECM/PCM connector B (44P). |
| 15. | Check for continuity between MAF sensor/IAT sensor 5P connector terminal No. 4 and ECM/PCM connector terminal B33.
Is there continuity? YES - Go to 27. NO - Repair open in the wire between the ECM/PCM (B33) and the IAT sensor, then go to 22. |
| 16. | Turn the ignition switch OFF. |
| 17. | Jump the SCS line with the HDS. |
| 18. | Disconnect ECM/PCM connector B (44P). |
| 19. | Check for continuity between MAF sensor/IAT sensor 5P connector terminal No. 5 and ECM/PCM connector terminal B31.
Is there continuity? YES - Go to 27. NO - Repair open in the wire between the ECM/PCM (B31) and the IAT sensor, then go to 22. |
| 20. | Turn the ignition switch OFF. |
| 21. | Replace the MAF sensor/IAT sensor. |
| 22. | Reconnect all connectors. |
| 23. | Turn the ignition switch ON (II). |
| 24. | Reset the ECM/PCM with the HDS. |
| 25. | Do the ECM/PCM idle learn procedure. |
| 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 MAF sensor/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 - Troubleshooting is complete.n |
| 27. | Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM. |
| 28. | 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 MAF sensor/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 |