Operation CHARM: Car repair manuals for everyone.
Home >> Mercedes Benz >> 2002 >> SLK 230 (170.449) L4-2.3L SC (111.983) >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Air Flow Meter/Sensor >> Description and Operation >> Hot Film Mass Air Flow Sensor, Location/Task/Design/Function >> Hot Film Mass Air Flow Sensor, Task
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




9/2 Grille
9/3 Voltage rectifier
9/4 Housing
9/5 Electronics housing electrical connection
Pin 1: NTC ground (intake air temperature)
Pin 2: Circuit 87
Pin 3: HFM signal (air mass)
Pin 4: Power ground HFM
Pin 5: NTC signal (intake air temperature)
9/6 Bonded molded part
9/8 Hybrid printed circuit board
9/9 Cover
B2/5 Hot film MAF sensor

Detecting the air mass supplied to the engine and the intake air temperature
pro multis · About Operation CHARM