3408E and 3412E Industrial Engines Caterpillar

E059 Low Engine Coolant Level Warning

Usage:

3412E 4CR

Conditions Which Generate This Code:

The Electronic Control Module (ECM) detects a low coolant level for three seconds.

System Response:

The ECM will log the warning.

None

Test Step 1. Check the Coolant Level

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Pressurized System: Hot coolant can cause serious burns. To open the cooling system filler cap, stop the engine and wait until the cooling system components are cool. Loosen the cooling system pressure cap slowly in order to relieve the pressure.

Stop the engine.

After allowing the engine to cool, check the coolant level. Refer to the Operation and Maintenance Manual for the proper procedure.
Note: The coolant level sensor should be completely immersed in coolant.

Expected Result:

The coolant is at the proper level.

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

Test Step 2. Check the Coolant Level Sensor

Check the coolant level sensor. Refer to Troubleshooting, "Coolant Level Sensor Circuit - Test".

Expected Result:

The coolant level sensor is OK.

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