TUBE AS 2978175 - Caterpillar

The Electronic Control Module (ECM) detects all of the following conditions:
The engine has been running more than three minutes.
Air inlet temperature is greater than 75 °C (167 °F) for more than four seconds.
172-03 is not active.
172-04 is not active.System Response:The ECM will log the warning. The ECM will transmit a warning to the display in the cab. The ECM will reset the warning when the air inlet temperature is less than 73 °C (163 °F) for more than four seconds.Possible Performance Effect:
Low powerTroubleshooting:
There may be a problem with the aftercooler.
There may be a problem with the air inlet temperature sensor.Test Step 1. Check for Diagnostic Codes.
Connect the Caterpillar Electronic Technician (ET) to the service tool connector.
Place the engine control in the ON mode. The engine should be OFF.
Check Cat ET for any active diagnostic codes or logged diagnostic codes. Expected Result:No diagnostic codes are present.Results:
OK - Proceed to Test Step 2.
Not OK - Repair: Repair the diagnostic codes that are present. Refer to the appropriate topic in the "Troubleshooting With a Diagnostic Code" section of this manual.Ensure that the repair eliminates the problem.STOPTest Step 2. Perform a Check of the Aftercooler.
Perform a check of the aftercooler. Refer to the section on the aftercooler in Systems Operation/Testing and Adjusting. Expected Result:There are no problems with the aftercooler.Results:
OK - There may be an intermittent problem.Repair: Monitor the operation of the engine.Repair the problem.Ensure that the repair eliminates the problem.STOP
Not OK - Repair: Repair the problem.Ensure that the repair eliminates the problem.STOP