DTC Troubleshooting
DTC P0113: IAT Sensor Circuit High VoltageNOTE: Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information.
1. Turn the ignition switch ON (II).
2. Check the IAT SENSOR in the DATA LIST with the HDS.
Is about -40 °F(-40 °C) or less, or 4.90 V or more indicated?
YES - Go to step 3.
NO - Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the IAT sensor and the PCM.
3. Turn the ignition switch OFF.
4. Disconnect the IAT sensor 2P connector.
5. Connect 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 °F(-40 °C) or less, or 4.90 V or more indicated?
YES - Go to step 8.
NO - Go to step 18.
8. Turn the ignition switch OFF.
9. Remove the jumper wire from the IAT sensor 2P connector.
10. Turn the ignition switch ON (II).
11. Measure voltage between IAT sensor 2P connector terminal No. 1 and body ground.
Is there about 5 V?
YES - Go to step 12.
NO - Go to step 17.
12. Turn the ignition switch OFF.
13. Jump the SCS line with the HDS.
14. Disconnect PCM connector C (22P).
15. Connect IAT sensor 2P connector terminal No. 2 to body ground with a jumper wire.
16. Check for continuity between PCM connector terminal C12 and body ground.
Is there continuity?
YES - Go to step 25.
NO - Repair open in the wire between the PCM (C12) and the IAT sensor, then Go to step 20.
17. Measure voltage between PCM connector terminal A5 and body ground.
Is there about 5 V?
YES - Repair open in the wire between the PCM (A5) and the IAT sensor, then Go to step 20.
NO - Go to step 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 PCM with the HDS.
23. Do the PCM idle learn procedure.
24. Check for Temporary DTCs or DTCs with the HDS.
Is DTC P0113 indicated?
YES - Check for poor connections or loose terminals at the IAT sensor and the PCM, then Go to step 1.
NO - Troubleshooting is complete. If any other Temporary DTCs or DTCs are indicated, Go to the indicated DTC's troubleshooting.
25. Update the PCM if it does not have the latest software, or substitute a known good PCM.
26. Check for Temporary DTCs or DTCs with the HDS.
Is DTC P0113 indicated?
YES - Check for poor connections or loose terminals at the IAT sensor and the PCM. If the PCM was updated, substitute a known good PCM, then recheck. If the PCM was substituted, Go to step 1.
NO - If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the original PCM. If any other Temporary DTCs or DTCs are indicated, Go to the indicated DTC's troubleshooting.