3408E and 3412E Engines for Caterpillar Built Machines Inlet Air Temperature Is High Caterpillar


Inlet Air Temperature Is High
`
3408E and 3412E Engines for Caterpillar Built Machines [SENR1062]
AIR INLET AND EXHAUST SYSTEM
INLET GP-AIR
3408E and 3412E Engines for Caterpillar Built Machines Inlet Air Temperature Is High
1.1. Probable Causes
2.1. Recommended Actions
3.2. High Ambient Air Temperature
4.2. High Coolant Temperature
5.2. High Inlet Air Restriction and/or High Altitude
6.3. Inlet Air Restriction
7.3. High Altitude
8.2. Faulty Inlet Air Temperature Sensor and/or the Circuit

Use this procedure in order to troubleshoot a high inlet air temperature. Refer to Troubleshooting, "Event Codes" for information about event codes and the default trip point for this code. You must access the monitoring system on AVSpare Electronic Technician (ET) in order to view the current trip point for this code.

Table 1
Event Code    
Code     Conditions which Activate the Code     System Response    
E025(2) High Inlet Air Temperature Derate     The inlet air temperature has exceeded the programmed trip point for the specified delay time.     The code is logged.
Engine power is derated.    
E027(1) High Inlet Air Temperature Warning     The inlet air temperature has exceeded the programmed trip point for the specified delay time.     The code is logged.    

Probable Causes

  • High ambient air temperature

  • High coolant temperature

  • High inlet air restriction and/or high altitude

  • Faulty inlet air temperature sensor and/or circuit

Recommended Actions

High Ambient Air Temperature

Determine if the ambient air temperature is within the design specifications for the cooling system.

Determine the cause of the high air temperature. Modify the inlet air system in order to supply intake air that is within specifications, if necessary.

High Coolant Temperature

Check for a high coolant temperature for the engine.

Refer to Troubleshooting, "Coolant Temperature Is High".

High Inlet Air Restriction and/or High Altitude

When inlet air pressure is low, the turbocharger works harder in order to achieve the desired inlet air pressure. This increases inlet air temperature.

Measure the inlet air pressure while the engine is operating under load. For specific data, refer to the Technical Marketing Information (TMI) for your engine.

Inlet Air Restriction

Check for plugged air filters. Check for obstructions to the air inlet.

Replace the air filters and/or remove the obstruction from the air inlet.

High Altitude

Confirm that the settings for the engine are correct for operation at the altitude of the engine installation.

Faulty Inlet Air Temperature Sensor and/or the Circuit

Allow the engine to cool. Remove the sensor from the engine. Use Cat ET to check the status of the "Engine Coolant Temperature" parameter. Compare the reading to the ambient air temperature. If the sensor is OK, the readings will be approximately equal.

If the readings are not approximately equal, switch the suspect sensor with a sensor that is known to be good. Compare the reading of the good sensor to the ambient air temperature. Replace the suspect sensor, if necessary.

Information System:

C13 Engine for Caterpillar Built Machines Cylinder Head - Remove and Install
D6N Track-Type Tractor Power Train Brake Pressure - Test
2009/04/13 Reworked Air Compressors Now Have "R" on the Serial Number Plate {1803, 1804}
C15 and C18 Industrial Engines Diesel Particulate Filter - Remove and Install - Clean Emissions Module
TS180 and TS220 Towed Scrapers Wheel - Install
TS180 and TS220 Towed Scrapers Wheel - Remove
3408E and 3412E Engines for Caterpillar Built Machines Coolant Flow - Test
AccuGrade<SUP>&reg;</SUP> GPS / Single UTS / Site and Laser Reference v11 for Excavators Electrical Power Supply (Display)
D5R Track-Type Tractor MID 039 - CID 1189 - FMI 02
C9.3 Engines for Caterpillar Built Machines Engine Monitoring System
3500B, 776D, 777D, 784C, 785C, 789C, 793C and and 793D Off-Highway Truck/Tractors Electric Starting Motor
D3K, D4K, And D5K Track-Type Tractors Engine Not Starting Due To A Blown Engine ECM Fuse{1901}
C9.3 Engines for Caterpillar Built Machines Diagnostic Capabilities
C4.4 Industrial Engine Battery - Replace
D7E Track-Type Tractor Power Train Idler - Remove and Install
C13, C15, and C18 Tier 4 Interim Engines ARD Nozzle - Test
AccuGrade<SUP>&reg;</SUP> GPS / Single UTS / Site and Laser Reference v11 for Excavators Electrical Power Supply (Light Bar)
AccuGrade<SUP>&reg;</SUP> GPS / Single UTS / Site and Laser Reference v11 for Excavators Electrical Power Supply (GPS Receiver)
AccuGrade<SUP>&reg;</SUP> GPS / Single UTS / Site and Laser Reference v11 for Excavators Electrical Power Supply (Data Radio)
AccuGrade<SUP>&reg;</SUP> GPS / Single UTS / Site and Laser Reference v11 for Excavators Electrical Power Supply (Angle Sensor)
AccuGrade</SUP> GPS / Single UTS / Site and Laser Reference v11 for Excavators CAN Data Link - Test
AccuGrade</SUP> GPS / Single UTS / Site and Laser Reference v11 for Excavators Light Bar - Configure
AccuGrade</SUP> GPS / Single UTS / Site and Laser Reference v11 for Excavators Machine Dimensions - Configure
AccuGrade</SUP> GPS / Single UTS / Site and Laser Reference v11 for Excavators Machine Type - Configure