3512C HD and 3516C HD IPP Rental Power Modules Caterpillar

Intake Manifold Air Temperature Is High

Usage:

Use this procedure in order to troubleshoot high intake manifold air temperature. Also, use this procedure if one of the following event codes is active.

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Table 1
Diagnostic Trouble Codes
J1939 Code	CDL Code	Code Description	System Response
105-15	E539(1)	Engine Intake Manifold #1 Temperature : High - least severe (1)	The code is logged. The intake manifold air temperature is above the trip point for the programmed delay time.
105-16	E539(2)	Engine Intake Manifold #1 Temperature : High - moderate severity (2)	The code is logged. Engine power is derated. The intake manifold air temperature is above the trip point for the programmed delay time.
105-0	E539(3)	Engine Intake Manifold #1 Temperature : High - most severe (3)

Probable Causes

Diagnostic codes and event codes
High inlet air temperature
High coolant temperature
Air inlet restriction
Exhaust restriction
Engine overload
Aftercooler problem

Recommended Actions

Note: The procedures have been listed in order of probability. Complete the procedures in the order of the listed test steps.

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Table 2
Troubleshooting Test Step	Value	Result
1. Check for Codes A. Connect Caterpillar Electronic Technician (ET) to the service tool connector. Refer to Troubleshooting, "Electronic Service Tools", if necessary. B. Download the "Product Status Report" from the engine ECM before performing any troubleshooting or clearing diagnostic trouble codes. C. Determine if the diagnostic trouble code that directed to this procedure is present. D. Look for active diagnostic codes that are associated with the system for the event code that directed to this procedure.	105	Result: An associated code is present. Repair: Troubleshoot any associated codes before continuing with this test. Result: A 105 code is present. Proceed to the next step. Result: No active codes STOP
2. Check for High Inlet Air Temperature A. Check for a high inlet air temperature. Refer to Troubleshooting, "Inlet Air Temperature Is High".	Temperature	Result: The inlet air temperature is OK. Proceed to the next step. Result: The inlet air temperature is NOT OK. Repair: Determine the cause of the high inlet air temperature and correct the problem. If the problem is not resolved, proceed to the next step.
3. Check for High Coolant Temperature A. Check for a high coolant temperature for the engine. Refer to Troubleshooting, "Coolant Temperature Is High".	Temperature	Result: The coolant temperature is OK. Proceed to the next step. Result: The coolant temperature is NOT OK. Repair: Determine the cause of the high coolant temperature and correct the problem. If the problem is not resolved, proceed to the next step.
4. Check for Inlet Air Restriction A. Check for inlet air restriction. Refer to Troubleshooting, "Inlet Air Is Restricted". NOTE: A restriction of the inlet air can cause high cylinder temperatures. High cylinder temperatures can cause a high coolant temperature.	Exhaust restriction	Result: The inlet air is not restricted. Proceed to the next step. Result: The inlet air is restricted. Repair: Determine the reason for high inlet air restriction and repair. If the problem is not resolved, proceed to the next step.
5. Check for Exhaust Restriction A. Measure the exhaust restriction during engine operation with a load. For data that is specific to your engine, refer to the Technical Marketing Information (TMI). NOTE: A restriction in the exhaust system can cause high cylinder temperatures. High cylinder temperatures can cause a high coolant temperature.	Restriction	Result: The exhaust restriction measures OK. Proceed to the next step. Result: The exhaust restriction measurement is NOT OK. Repair: Determine the reason for high exhaust restriction and repair. If the problem is not resolved, proceed to the next step.
6. Check for Engine Overload A. Determine if the engine is being overloaded. NOTE: When the engine is running in the lug condition, engine rpm does not increase with an increase of fuel. The lug condition can cause high cylinder temperatures. High cylinder temperatures can cause a high coolant temperature.	Load	Result: The engine is not being overloaded. Proceed to the next step. Result: The engine is being overloaded. Repair: Reduce engine load to an acceptable limit. If the problem is not resolved, proceed to the next step.
7. Check for a High Inlet Temperature for the Aftercooler A. For Separate Circuit Aftercooling (SCAC, if equipped) compare the temperature of the coolant to the regulated temperature. B. For Air-To-Air Aftercooling (ATAAC, if equipped) check for high ambient temperature. Inspect the aftercooler for debris.	Temperature	Result: The inlet temperature of the SCAC (if equipped) is OK. The ambient temperature for the ATAAC (if equipped) is OK. The ATAAC is clean. Proceed to the next step. Result: The inlet temperature for the SCAC is NOT OK . Repair: Determine why the inlet temperature of the coolant is high and correct the problem. If the problem is not resolved, proceed to the next step. Result: The ATAAC is clogged with debris. Repair: Clean the ATAAC.
9. Check for Insufficient Flow of Inlet Air Through the Aftercooler A. Determine the pressure differential of the inlet air across the aftercooler.	Restriction	Result: The pressure differential is NOT OK. Repair: Clean the aftercooler.