COVER 2939663 - Caterpillar

Table 1
Diagnostic Trouble Codes for High Intake Manifold Air Temperature
J1939 Code CDL Code Code Description
(code descriptions may vary) Comments
105-15 E539 (1) Engine Intake Manifold #1 Temperature : High - least severe (1) The engine has been running for 3 minutes.
No other 105 (172) codes are active.
168 codes are not active.
The intake manifold air temperature exceeds the value that is programmed into the ECM for 8 seconds. The code is logged.
This code will be reset when the temperature is less than 122° C (252° F) for 4 seconds.
105-16 E539 (2) Engine Intake Manifold #1 Temperature : High - Moderate Severity (2) The engine has been running for 3 minutes.
No other 105 (172) codes are active.
168 codes are not active.
The intake manifold air temperature exceeds the value that is programmed into the ECM for 8 seconds. The engine will be derated. The code is logged.
This code will be reset when the temperature is less than 124° C (255° F) for 20 seconds.
105-0 E539 (3) Engine Intake Manifold #1 Temperature : High - most severe (3) The engine has been running for 3 minutes.
No other 105 (172) codes are active.
168 codes are not active.
The intake manifold air temperature exceeds the value that is programmed into the ECM for 8 seconds. The engine will be shut down. The code is logged.
This code will be reset when the temperature is less than 124° C (255° F) for 20 seconds. Probable Causes
Coolant level
Air-to-air aftercooler (ATAAC)
Cooling fan
Air inlet and exhaust system
Ambient temperature
Altitude
Running conditionRecommended Actions
Note: The procedures have been listed in order of probability. Complete the procedures in order.
Table 2
Troubleshooting Test Steps Values Results
1. Coolant Level
A. Check that the coolant is filled to the correct level.
Note: If the coolant level is too low, air will get into the cooling system. Air in the cooling system will cause a reduction in coolant flow.
Coolant
Result: The coolant level is low.
Repair: Fill the coolant system to the correct level. Refer to the Operation and Maintenance Manual, "Coolant Level - Check".
Result: The coolant level