Section 2.35
Fuel Temperature Sensor

The Series 60 diesel engine Fuel Temperature Sensor (FTS) is installed into the secondary fuel filter. See Figure "Fuel Temperature Sensor Location (Series 60 Diesel Engine)" . The FTS sends an electrical signal to the ECM indicating fuel inlet temperature. The ECM uses this information to calculate fuel consumption.‪

Figure 1. Fuel Temperature Sensor Location (Series 60 Diesel Engine)

On Series 60G engines with the high pressure fuel system the fuel temperature sensor is located in the PSV. See Figure "Fuel Temperature Sensor Series 60G Engine with High Pressure Fuel System" .‪

Figure 2. Fuel Temperature Sensor Series 60G Engine with High Pressure Fuel System

Section 2.35.1
Replacement of Fuel Temperature Sensor

The FTS is non-serviceable and should be replaced as a unit. No adjustment is required.‪

Section 2.35.2
Removal of Fuel Temperature Sensor

Remove the FTS as follows:‪

1. Disengage the locking tang on the two-wire connector. Grasp the body of the connector and gently pull it from the socket.
2. Use the appropriate wrench on the hex portion of the sensor and unscrew it from the fitting.

Section 2.35.3
Installation of Fuel Temperature Sensor

Install the FTS as follows:‪

1. Use Loctite® Pipe sealer with Teflon PT-7260 (or equivalent) on all but the first two threads of the FTS to prevent leaks.
2. Screw the FTS into the fitting or housing.
3. Engage locking tang.
4. Turn the ignition to the ON position. Observe the DDR for any diagnostic code(s). If any code(s) other than code 25 is logged, refer to the Detroit Diesel Single ECM Troubleshooting Manual (6SE497).