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

Hot Film Mass Air Flow Sensor, Task




Hot Film Mass Air Flow Sensor, Task




9/1 Hot film sensor
9/2 Measurement channel
9/3 Protective grille
9/4 Housing
9/5 Electrical connection of electronics housing
Pin 1: intake air temperature signal
Pin 2: Terminal 87
Pin 3: ground
Pin 4: 5 V
Pin 5: Air mass signal
9/7 NTC-resistor (intake air temperature)

B2/5 Hot film mass air flow sensor

Detecting the air mass supplied to the engine and the intake air temperature.