Electronic Modular Control Panel II (EMCP II) For MUI Engines Caterpillar

Illustration 1	g00483875
Schematic For Fluid Level Sensor (Engine Coolant)

In order to find the cause of a low level shutdown, perform this procedure.

1. Check the coolant level.

   1. Check the level of the engine coolant. See the Operation And Maintenance Manual for the engine.

      Expected Result: The coolant level should be at the proper level. The coolant level should be above the probe of the fluid level sensor.

      Result:

      • OK - Proceed to 2.

      • NOT OK - Coolant level is not correct. Find the cause and correct the cause. Refer to the Engine Service Manual. STOP.

2. Check for a diagnostic fault.

   1. Turn the ECS to the OFF/RESET position and then turn the ECS to the STOP position.

   2. Wait for ten seconds.

   3. Check for an active CID 111. See Testing And Adjusting, "Troubleshooting Diagnostic Codes".

      Expected Result: CID 111 should not be showing. The indicator for the low coolant level should not be FLASHING.

      Results:

      • OK - No CID 111 diagnostic codes are active. The indicator for the low coolant level is OFF. Therefore, the fault may be intermittent. Check the harness and all the electrical connections of the circuit for the low coolant level. See Testing And Adjusting, "Electrical Connections - Inspect". STOP.

      • NOT OK - CID 111 is active. Correct the active CID 111. See Testing And Adjusting, "Troubleshooting Diagnostic Codes". STOP.

      • NOT OK - No CID 111 is active. The indicator for the low coolant level is FLASHING. Therefore, the sensor is faulty. Replace the fluid level sensor. STOP.