Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

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Barometric Pressure Sensor: Testing and Inspection


Testing Atmospheric Pressure Sensor:





1. Connect a voltmeter to the atmospheric pressure sensor terminal wire "D".
2. Turn the ignition switch on and take a voltage reading. At sea level the voltage should be 3.5-4.5 volts. At high altitude (6,500 ft. above sea level) the voltage should be 2.5-3.5 volts.
3. Replace the sensor if necessary.