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Home >> GMC >> 1983 >> W Sprint/Caballero V6-231 3.8L >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Testing and Inspection >> Scan Tool Testing and Procedures >> Test Positions >> MAP/VAC Sensor
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MAP/VAC Sensor


Voltage generated by the Manifold Absolute Pressure (MAP) or vacuum sensors will be displayed. Sensors generate low voltage (approx. 1 volt) when pressure is low or manifold vacuum is high, and high voltage (approx. 4.5 volts) when pressure is high or vacuum is low.