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Sensor Operating Range Charts

NOTE: Unless stated otherwise in test procedure, perform all voltage tests using a Digital Volt-Ohmmeter (DVOM) with a minimum 10-megohm input impedance.
ENGINE COOLANT TEMPERATURE SENSOR RESISTANCE

Temperature °F (°C) (1) Ohms
32 (0) 5000-8000
50 (10) 3000-5000
68 (20) 2000-3000
86 (30) 1500-2000
104 (40) 1000-1500
122 (50) 700-1000
140 (60) 600-800
158 (70) 300-600
176 (80) 260-400
(1) Resistance values are approximate. Check sensor in water.
EGR TEMPERATURE SENSOR RESISTANCE (4.0L)

Temperature °F (°C) (1) Ohms
212 (100) 60,000-100,000
302 (150) 15,000-25,000
392 (200) 3000-8000
482 (250) 1500-2500
572 (300) 400-1000
662 (350) 250-350
(1) Resistance values are approximate. Check sensor in boiling water.
HEATED OXYGEN SENSOR VOLTAGE (4.0L)

Condition Volts
Lean 0.2
Rich 4.8
HEATED OXYGEN SENSOR VOLTAGE (6.0L)

Condition Volts
Lean .1
Rich .9
INTAKE AIR TEMPERATURE SENSOR RESISTANCE

Temperature °F (°C) (1) Ohms
32 (0) 5000-8000
50 (10) 3000-5000
68 (20) 2000-3000
86 (30) 1500-2000
104 (40) 1000-1500
122 (50) 700-1000
140 (60) 600-800
158 (70) 300-600
176 (80) 260-400
(1) Resistance values are approximate.
MASS AIRFLOW SENSOR VOLTAGE (4.0L)

Condition (1) Volts
700 RPM 1.30
1500 RPM 1.70
3000 RPM 2.30
(1) Measure voltage between terminals No. 1 and 3.