Auto-Zone Control Systems Auto-Zone Basic Systems Installation & Operation (Version 02C) - Manual (Page 141)

Auto-Zone Basic Section 4
Start-Up & Troubleshooting 4-39
Temperature Sensor Resistance Chart
Table 4-2: Temperature Sensor Resistance
Temperature
(ºF)
Resistance
(Ohms)
Voltage @
Input (VDC)
Temperature
(ºF)
Resistance
(Ohms)
Voltage @ Input
(VDC)
-10 93333 4.620 72 11136 2.695
-5 80531 4.550 73 10878 2.665
0 69822 4.474 74 10625 2.635
5 60552 4.390 75 10398 2.607
10 52500 4.297 76 10158 2.577
15 45902 4.200 78 9711 2.520
20 40147 4.095 80 9302 2.465
25 35165 3.982 82 8893 2.407
30 30805 3.862 84 8514 2.352
35 27140 3.737 86 8153 2.297
40 23874 3.605 88 7805 2.242
45 21094 3.470 90 7472 2.187
50 18655 3.330 95 6716 2.055
52 17799 3.275 100 6047 1.927
54 16956 3.217 105 5453 1.805
56 16164 3.160 110 4923 1.687
58 15385 3.100 115 4449 1.575
60 14681 3.042 120 4030 1.469
62 14014 2.985 125 3656 1.369
64 13382 2.927 130 3317 1.274
66 12758 2.867 135 3015 1.185
68 12191 2.810 140 2743 1.101
69 11906 2.780 145 2502 1.024
70 11652 2.752 150 2288 0.952
71 11379 2.722
Notes:
1. Use the resistance column to check the thermistor sensor while disconnected from the controllers
(not powered).
2. Use the voltage column to check sensors while connected to powered controllers. Read voltage
with meter set on DC volts. Place the “-” (minus) lead on GND terminal and the “+” (plus) lead
on the sensor input terminal being investigated.
If the voltage is above 5.08 VDC, the sensor or wiring is “open.” If the voltage is less than 0.05
VDC, the sensor or wiring is shorted.