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Home >> Ford >> 1990 >> Bronco II RWD, Standard, M5OD-R1 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests >> Engine Sensors & Switches >> Vane Air(Flow) Temperature (Vat) Sensor
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Vane Air(Flow) Temperature (Vat) Sensor

When testing VAT sensor, ensure ambient temperature is more than 50°F (10°C). Disconnect temperature sensor connector. Set DVOM to 20 k/ohm scale and measure resistance across sensor terminals. See VAT SENSOR RESISTANCE/VOLTAGE  and Fig 1 for resistance specifications.

Fig 1: Temperature Sensor Resistance Graph
G90J14323Courtesy of FORD MOTOR CO.
VAT SENSOR RESISTANCE/VOLTAGE

Sensors °F (°C) Specifications Volts (K Ohms)
VAT Sensor
248 (120) .38 (.11)
230 (110) .46 (.14)
212 (100) .56 (.19)
194 (90) .76 (.25)
176 (80) .95 (.33)
158 (70) 1.19 (.44)
140 (60) 1.49 (.60)
122 (50) 1.84 (.83)
104 (40) 2.23 (1.18)
86 (30) 2.65 (1.70)
68 (20) 3.07 (2.50)
50 (10) 3.46 (3.77)