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FAULT CODE 195

Coolant Level Sensor 1 Circuit - Voltage Above Normal or Shorted to High Source

Overview


CODE

REASON

EFFECT

Fault Code: 195

Coolant Level Sensor 1 Circuit - Voltage Above Normal or Shorted to High Source. High signal voltage

None on

PID:

detected at engine coolant level circuit.

performance.

SPN: 111



FMI: 3/3



LAMP: Amber



SRT:



Coolant Level Sensor 1 Circuit - Industrial Engine


Coolant Level Sensor 1 Circuit - Marine Engines


Coolant Level Sensor 1 Circuit - Power Generation En


Circuit Description

The engine control module (ECM) supplies a 5-volt supply to the engine coolant level sensor 1 using a common sensor supply circuit. The ECM also provides a ground on the engine coolant level sensor 1 return circuit. The coolant level sensor 1 monitors the engine coolant level within the coolant system and passes information to the ECM through the original equipment manufacturer (OEM) harness and engine harness.


Component Location


The coolant level sensor 1 is typically located in the radiator top tank or surge tank. Refer to the OEM service manual for location.


Shop Talk


Some engines are equipped with a 2-wire sensor instead of a 3-wire sensor. The 2-wire sensors do not have the 5-volt supply wire in the circuit. Possible causes of this fault code include:

  • Open return or signal circuit in the harness, connectors, or sensor

  • Signal wire shorted to sensor supply or battery voltage

  • Sensor supply circuit shorted to battery voltage (3-wire sensors only).


Refer to Troubleshooting Fault Code t05-195.


Last Modified: 28-Nov-2012

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