C9.3 Marine Auxiliary and Generator Set Engine Caterpillar

Intake Manifold Air Temperature Is High

Usage:

C9.3 C93

Table 1 lists the diagnostic trouble codes for high intake manifold air temperature.

Note: Some of the following codes may not be applicable for certain applications.

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Table 1
J1939 Code and Description	Comments
105-0 Engine Intake Manifold #1 Temperature : Data High - Most Severe (3)	The code indicates that the temperature of the intake air into the engine has risen above a predetermined threshold. The value is obtained from a virtual sensor. For information on virtual sensors, refer to System Operations and Testing and Adjusting. Engine power may be shut down.
105-15 Engine Intake Manifold #1 Temperature : Data High - Least Severe (1)	The code indicates that the temperature of the intake air into the engine has risen above a predetermined threshold. The value is obtained from a virtual sensor. For information on virtual sensors, refer to System Operations and Testing and Adjusting.
105-16 Engine Intake Manifold #1 Temperature : Data High - Moderately Severe (2)	The code indicates that the temperature of the intake air into the engine has risen above a predetermined threshold. The value is obtained from a virtual sensor. For information on virtual sensors, refer to System Operations and Testing and Adjusting. Engine power may be derated.

Complete the procedure in the order in which the steps are listed.

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Table 2
Troubleshooting Test Steps	Values	Results
1. Check for Diagnostic Trouble Codes A. Establish communication between Caterpillar^® Electronic Technician (Cat ET) and the Electronic Control Module (ECM) . Refer to Troubleshooting, "Electronic Service Tools", if necessary. B. Download the "Warranty Report" from the engine ECM before performing any troubleshooting or clearing diagnostic trouble codes. C. Determine if an associated code is active or logged. Table 2 lists associated diagnostic codes.	Codes	Result: A code is not active or logged. Proceed to Test Step 2. Result: An associated code is active. Repair: Refer to Troubleshooting, "Diagnostic Trouble Codes" to troubleshoot the associated diagnostic code. Result: An associated code is not active or logged. Proceed to Test Step 2. Result: A 105-0 diagnostic code is active. Proceed to Test Step 2.

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Illustration 1	g03821086
Inspection point

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Table 3
Troubleshooting Test Steps	Values	Results
2. Check the Aftercooler for Leaks or Restrictions A. Inspect the exterior surface of the aftercooler for leaks. B. Inspect the aftercooler core for any restrictions.	Restrictions	Result: The exterior of the aftercooler is not damaged. Proceed to Test Step 3. Result: The aftercooler core has an excessive buildup of dirt or debris. Repair: Clean the aftercooler. Refer to the engine Test and Adjust manual. Verify that the problem has been resolved. If the problem still exists, proceed to Test Step 3. Result: The aftercooler core is damaged. Repair: Replace the aftercooler core. If the problem still exists, proceed to Test Step 3.
3. Check the Radiator for Leaks or Restrictions A. Inspect the exterior surface of the Radiator for excessive buildup of dirt or debris. Also verify that the fins of the Radiator are not damaged.	Radiator	Result: The exterior and fins of the Radiator does not contain any restrictions or have any leaks. Proceed to Test Step 4. Result: The exterior and/or fins of the Radiator contains debris or has a leak. Repair: Clean the debris or restrictions from the Radiator or replace if Radiator is damaged. If the problem still exists, proceed to Test Step 4.
4. Check the Operation of the Charge Air Cooler Outlet Temperature Sensor A. Remove the charge air cooler outlet temperature sensor. Allow the charge air cooler outlet temperature sensor to rest in ambient air for 2 minutes. B. Connect to the engine ECM by using Cat ET. C. Monitor the value of the charge air cooler outlet temperature sensor on Cat ET.	Sensor	Result: The value of the charge air cooler outlet temperature sensor is within ± −9° C (±15° F) of the ambient temperature. Repair: Reinstall the sensor. Torque the sensor to the proper specifications. Return the unit to service. Result: The value of the charge air cooler outlet temperature sensor is not within ± −9° C (±15° F) of the ambient temperature. Repair: Replace the charge air cooler outlet temperature sensor. Return the unit to service.

If the procedure did not correct the issue, contact your Cat dealer Technical Communicator (TC). For further assistance, your TC can confer with the Dealer Solutions Network (DSN).