| DTC P2199: | IAT Sensor 1/2 Incorrect Voltage Correlation |
| 1. | Turn the ignition switch ON (II). |
| 2. | Clear the DTC with the HDS. |
| 3. | Start the engine. Hold the engine speed at 2,000 rpm (min-1) without load (in neutral) until the radiator fan comes on, then let it idle. |
| 4. | Test-drive under these conditions:
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| 5. | Monitor the OBD STATUS for DTC P2199 in the DTCs MENU with the HDS. Does the screen indicate FAILED? YES - Go to 6. NO - If the screen indicates PASSED, intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the MAF sensor/IAT sensor 1, the MAP sensor/IAT sensor 2 and the ECM, and check for poor connections or blockage in the intake air duct. If the screen indicates NOT COMPLETED, go to 4 and recheck. |
| 6. | Turn the ignition switch OFF. |
| 7. | Remove the MAF sensor/IAT sensor 1, and the MAP sensor/IAT sensor 2. |
| 8. | Allow the MAF sensor/IAT sensor 1 and the MAP sensor/IAT sensor 2 to cool below 25 °C (77 °F). |
| 9. | Note the ambient temperature. |
| 10. | Connect the MAF sensor/IAT sensor 1 to its 2P connector and the MAP sensor/IAT sensor 2 to its 2P connector, but do not install them into the intake air duct. |
| 11. | Turn the ignition switch ON (II). |
| 12. | Note the value of IAT SENSOR 1 and IAT SENSOR 2 quickly in the DATA LIST with the HDS. |
| 13. | Compare the value of IAT SENSOR 1 and the ambient temperature, and the value of IAT SENSOR 2 and the ambient temperature individually. Does either sensor differ more than 35 °C (63 °F) from the ambient temperature? YES - Replace the sensor that differed more than 35 °C (63 °F) from the ambient temperature, then go to 14. NO - Intermittent failure, system is OK at this time. Check for poor connections or blockage in the intake air duct, then go to 14. |
| 14. | Install the MAF sensor/IAT sensor 1, and the MAP sensor/IAT sensor 2. |
| 15. | Turn the ignition switch ON (II). |
| 16. | Reset the ECM with the HDS. |
| 17. | Start the engine. Hold the engine speed at 2,000 rpm (min-1) without load (in neutral) until the radiator fan comes on, then let it idle. |
| 18. | Test-drive under these conditions:
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| 19. | Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P2199 is indicated, check for poor connections or loose terminals at the MAF sensor/IAT sensor 1, the MAP sensor/IAT sensor 2 and the ECM, then go to 1. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting. NO - Go to 20. |
| 20. | Monitor the OBD STATUS for DTC P2199 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES - Troubleshooting is complete.n NO - If the screen indicates FAILED, check for poor connections or loose terminals at the MAF sensor/IAT sensor 1, the MAP sensor/IAT sensor 2 and the ECM, then go to 1. If the screen indicates NOT COMPLETED, go to 18 and recheck. |