FAULT CODE 265
Engine Fuel Temperature Sensor 1 Circuit - Voltage Below Normal or Shorted to Low Source
Overview
CODE | REASON | EFFECT |
Fault Code: 265 | Engine Fuel Temperature Sensor 1 Circuit - Voltage Below Normal or | Engine control module (ECM) will set a default |
PID: | Shorted to Low Source. Less than 0.21 volt detected at the fuel | value for fuel temperature. No other action |
SPN: 174 | temperature signal pin of the engine harness. | taken by ECM. |
FMI: 4 | ||
LAMP: Amber | ||
SRT: QU-065 |
Engine Fuel Temperature Sensor 1 Circuit - Power Generation
Engines
Engine Fuel Temperature Sensor 1 Circuit - Marine En
Circuit Description
The engine fuel temperature sensor 1 is used by the ECM to monitor the temperature of the fuel. The fuel temperature is used by the ECM for the engine protection system, timing, and fueling control. The ECM monitors the voltage the sensor signal pin. The ECM expects to see the voltage vary between 0.5 and
4.5 volt. If the voltage is below 0.21 volt, then the ECM will log Fault Code 265. Voltage below 0.21 volt on the sensor SIGNAL pin can be caused by shorts to
ground on the SUPPLY or RETURN wires or an internally grounded, damaged sensor.
Component Location
The engine fuel temperature sensor 1 is located on the left side of the engine, on the fuel filter head. Use the following procedure for a detailed component location view. Refer to Procedure 100-002 in Section E.
Shop Talk
All temperature sensors:
The resistance of the sensor varies with the temperature. The reading that you observe could possibly compare to the following table if the sensor is functioning properly.
Temperature (°C) | Temperature [°F] | Resistance (ohms) |
0 | 32 | 30k to 36k |
25 | 77 | 9k to 11k |
50 | 122 | 3k to 4k |
75 | 167 | 1350 to 1500 |
100 | 212 | 600 to 675 |
Refer to Troubleshooting Fault Code t05-265.
Last Modified: 29-Nov-2012
Copyright © 2000-2010 Cummins Inc. All rights reserved.