DISC 1616435 - Caterpillar

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.
Table 1
Event Code    
Code and Description    Conditions which Generate this Code    System Response    
E539(1) High Intake Manifold Air Temperature - least severe     The intake manifold air temperature is above the trip point for the programmed delay time.     The code is logged.
The ECM may derate the engine or shutdown the engine.    
E539(2) High Intake Manifold Air Temperature - moderate severity    
E539(3) High Intake Manifold Air Temperature - most severe    Probable Causes
High coolant temperature
High ambient air temperature
Air inlet restriction
Exhaust restriction
Altitude
Engine OverloadRecommended Actions
Note: The procedures have been listed in order of probability. Complete the procedures in the order of the listed test steps.
Table 2
Troubleshooting Test Step    Value    Result    
1. Active Codes and Logged Codes
A. Establish communication between Caterpillar Electronic Technician (ET) and the Electronic Control Module (ECM).
B. Monitor the diagnostic codes on Cat ET. Check for active or logged diagnostic codes. Specifically check for codes that could be associated to high intake manifold temperature. Refer to the histogram information for engine derates in Cat ET.
Note: Wait at least 30 seconds in order for diagnostic codes to become active.
C. If the histograms contain derates and no diagnostic codes are present, then the engine is operating normally.
   
Codes    
Result: A diagnostic code is present.
Repair: Troubleshoot any codes before continuing with this procedure.
Verify that the repair eliminated the problem.
Reset the histogram.
Result: A diagnostic code is not present.
Proceed to Test Step 2.    
2. 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 Test Step 3.
Result: The coolant temperature is NOT OK.
Repair: Determine the cause of the high coolant temperature and correct the problem.
Verify that the repair eliminated the problem.
   
3. High Ambient Air Temperature
A. Determine if the ambient air temperature is within the design specifications for the cooling system.
   
Temperature
   
Result: The ambient air temperature is OK.
Proceed to Test Step 4.
Result: The ambient air temperature is NOT OK.
Repair: Determine the cause of the high ambient air temperature and correct the problem.
Verify that the repair eliminated the problem.
   
Check for a restriction in the air inlet system. A restriction of the inlet air can cause high cylinder temperatures. High cylinder temperatures cause higher than normal temperatures in the cooling system. The coolant temperature must be within the correct range in order to cool the intake air.
4. Inlet Air Restriction
A. Check for inlet air restriction.
Refer to Troubleshooting, "Inlet Air Is Restricted".
   
Restriction
   
Result: The inlet air is not restricted.
Proceed to Test Step 5.
Result: The inlet air is restricted.
Repair: Determine the reason for high inlet air restriction and repair.
Verify that the repair eliminated the problem.
   
Check for a restriction in the exhaust system. A restriction of the exhaust can cause high cylinder temperatures.
5. Exhaust Restriction
A. Measure the exhaust restriction during engine operation with