DD15 High Inlet Air Temperature Troubleshooting

Check as follows:‪

1. Inspect the radiator, CAC and winter fronts for blockage. Remove if found.
2. Test the radiator fan, fan drive, or fan shroud for proper operation or configuration; refer to OEM guidelines.Note: The engine will be torque limited to protect the turbocharger and charge air cooler. This is normal engine operation for component protection.
3. Examine test results.
   1. 1. If the radiator fan, fan drive, or fan shroud pass the leak test, check high altitude operation; refer to “10.9 High Altitude Operation” .
      2. If the radiator fan, drive or shroud did not operate correctly; remove and replace the radiator fan, drive and/or shroud; refer to OEM guidelines.

   ENGINE EXHAUST ‪
   To avoid injury from inhaling engine exhaust, always operate the engine in a well-ventilated area. Engine exhaust is toxic.‪

4. Start and run the engine.
5. Test drive the vehicle to ensure lack of power has been resolved.
   1. If no lack of power occurred during the test drive, no further troubleshooting is required. Shut down the engine.
   2. If lack of power occurred during the test drive, shut down the engine. Check high fuel temperature and high altitude operation; refer to “10.8 High Fuel Temperature Return” and section “10.9 High Altitude Operation” .