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)

Or, hide this message: temporarily or permanently

Air Flow Meter/Sensor

OUTPUT FREQUENCY
(Reading taken using scan tool)
At 750 RPM 40 - 60 Hertz
At 2,000 RPM 85 - 105 Hertz
Racing engine should increase the frequency

VOLTAGE SPECIFICATIONS
Terminal 4 System Voltage
Terminal 3 4.8 - 5.2 Volts