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)
Or, hide this message:
temporarily or
permanently
Vacuum Sensor
NOTE: If vehicle is not equipped with a
MAP sensor, it may be equipped with a vacuum sensor--some systems may not use either.
Sensor produces low voltage--approximately 1 volt--when manifold vacuum is low, and higher voltages--approximately 4.5 volts--when vacuum is high.
Normal output is 0.54-0.62 volts with ignition ON and engine stopped.