FAN-VENT 3N7323 - Caterpillar

Note: The main display module is connected.
Table 1
Sensor Voltage Specifications For The Sensor Voltage Test
100-3055 Temperature Sensor And 131-0427 Temperature Sensor
Temperature Signal Voltage(1) Duty Cycle
−20 to 0°C (−4 to 32°F) 1.1 to 1.4 DCV 11 to 15%
0 to 20°C (32 to 68°F) 1.4 to 2.0 DCV 15 to 23%
20 to 40°C (68 to 104°F) 2.0 to 3.1 DCV 23 to 37%
40 to 60°C (104 to 140°F) 3.1 to 4.5 DCV 37 to 55%
60 to 80°C (140 to 176°F) 4.5 to 5.7 DCV 55 to 71%
80 to 100°C (176 to 212°F) 5.7 to 6.6 DCV 71 to 82%
100 to 120°C (212 to 248°F) 6.6 to 7.2 DCV 82 to 89%
120 to 140°C (248 to 275°F) 7.2 to 7.4 DCV 89 to 93%
(1) These voltages are used as guidelines for troubleshooting and the voltages are not exact. The tolerance is 10%. The tolerance is dependent on the condition of the harness. The output voltage should change smoothly as the temperature changes.
Table 2
Sensor Voltage Specifications For The Sensor Voltage Test
3E-5370 Temperature Sensor And 131-0784 Temperature Sensor
Temperature Signal Voltage(1) Duty Cycle
−40 to 20°C (−40 to −4°F) 0.8 to 1.5 DCV 4 to 11%
−20 to 0°C (−4 to 32°F) 1.5 to 2.5 DCV 11 to 22%
0 to 20°C (32 to 68°F) 2.5 to 3.7 DCV 22 to 34%
20 to 40°C (68 to 104°F) 3.7 to 4.8 DCV 34 to 46%
40 to 60°C (104 to 140°F) 4.8 to 6.0 DCV 46 to 59%
60 to 80°C (140 to 176°F) 6.0 to 7.2 DCV 59 to 71%
80 to 100°C (176 to 212°F) 7.2 to 8.1 DCV 71 to 81%
100 to 120°C (212 to 248°F) 8.1 to 8.8 DCV 81 to 87%
120 to 140°C (248 to 275°F) 8.8 to 9.2 DCV 87 to 92%
(1) These voltages are used as guidelines for troubleshooting and the voltages are not exact. The tolerance is 10%. The tolerance is dependent on the condition of the harness. The output voltage should change smoothly as the temperature changes.Locate the suspect sensor. Identify the sensor wires and connector contacts. See Diagnostic Function, "Pulse Width Modulated (PWM) Sensor - Test". DO NOT DISCONNECT ANY HARNESS CONNECTORS AT THIS TIME. Turn the key start switch to the ON position. DO NOT START THE ENGINE. Test Step 1. CHECK THE SENSOR POWER.
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