Page 238 - CTS - Mechanic Diesel - TP

MECHANIC DIESEL - CITS

38 Disconnect wiring harness connector from the fuel temperature sensor
39 Measure the resistance of the fuel temperature sensor and record it.
40 Compare this reading with standard resistance valve given in the table below:

Fuel Temperature Resistance (OHMS)

C° F° Minimum Maximum
- 40° - 40° 291,490 381,710
- 20° - 4° 85,850 108,380
- 10° 14° 49,250 61,430
0° 32° 29,330 35,990
10° 50° 17,990 21,810
20° 68° 11,370 13,610
25° 77° 9,120 10,880
30° 86° 7,370 8,750
40° 104° 4,900 5,750
50° 122° 3,330 3,880
60° 140° 2,310 2,670
70° 158° 1,630 1,870
80° 176° 1,170 1,340
90° 194° 860 970
100° 212° 640 720
110° 230° 480 540
120° 248° 370 410

Note: The Internal resistance of the sensor should be less than 4000 ohms with the engine at
operating temperature.

41 Replace the sensor if the sensor resistance is out of range.
42 Test the resistance of the wire harness between the PCM connector and fuel Temperature sensor connector.
43 Repair the wire harness if necessary when resistance value is greater then 1 ohm.
44 Disconnect the scan tool from DLC and connect the wiring harness connector to the fuel temperature sensor.

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CITS : Automotive - Mechanic Diesel - Exercise 14.3