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Sensor Operating Range Charts: Gasoline

COOLANT TEMPERATURE SENSOR SPECIFICATIONS (LH-SFI 3.2L)

Temperature °F (°C) (1) Ohms Volts
-4 (-20) 15,700 5.12-5.60
14 (-10) 10,000 4.49-5.11
32 (0) 5900 4.12-4.48
50 (10) 3700 3.77-4.12
68 (20) 2500 3.36-3.76
86 (30) 1700 2.92-3.35
104 (40) 1170 2.51-2.91
122 (50) 830 2.09-2.50
140 (60) 600 1.69-2.08
158 (70) 435 1.36-1.68
176 (80) 325 1.09-1.35
194 (90) 245 .88-1.08
212 (100) 185 .75-.87
(1) When measuring resistance, measure across 2 terminals diagonally. See Fig 1 .
COOLANT TEMPERATURE SENSOR SPECIFICATIONS (HFM-SFI 2.8L & 3.2L) (1)

Temperature °F (°C) Ohms Volts
68 (20) 2500 3.5
86 (30) 1700 3.1
104 (40) 1170 2.7
122 (50) 830 2.3
140 (60) 600 1.9
158 (70) 435 1.5
176 (80) 325 1.2
194 (90) 245 1.0
212 (100) 185 .8
(1) Specifications may vary slightly.
Fig 1: Measuring Resistance Of Coolant Temperature Sensor
G91C17469Courtesy of MERCEDES-BENZ OF NORTH AMERICA.