3408E and 3412E Industrial Engines Caterpillar

The Electronic Control Module (ECM) detects the following condition:

• Engine coolant temperature is greater than 103 °C (217 °F) for more than 15 seconds.

System Response:

The ECM will log the warning. This event will be deactivated if coolant temperature falls below 103 °C (217 °F) for two seconds.

• None

• There may be a problem with the cooling system.

• There may be a problem with the coolant temperature sensor.

Test Step 1. Test the Cooling System

1. Test the cooling system for an overheating condition. Refer to Systems Operation/Testing and Adjusting, "Cooling System - Check".

2. Check for the following conditions: improper engine operation, excessive load, extreme ambient temperatures, restriction in the air inlet system and restriction in the exhaust system.

Expected Result:

There are no problems with the engine's cooling system.

Results:

• OK - The cause of the problem has not been identified.

  Repair: Refer to Troubleshooting, "Engine Sensor Open/Short Circuit - Test" in order to test the operation of the coolant sensor.

  STOP

• Not OK - The problem with the cooling system has been identified.

  Repair: Repair the problem. Ensure that the repair eliminates the problem.

  STOP