Volvo Workshop Manuals
V90 L6-2.9L VIN 96 B6304S (1998)
Sensors and Switches > Sensors and Switches - Powertrain Management > Sensors and Switches - Fuel Delivery and Air Induction > Air Flow Meter/Sensor > Component Information > Locations > Page 627
Air Flow Meter/Sensor: Description and Operation
The mass air flow (MAF) sensor transmits a signal to the engine control module (ECM) about the intake air mass.
This information is used to calculate:
if the engine cooling fan (FC) needs to run-on.
The mass air flow sensor consists of a plastic housing containing a connector, electronic circuitry and an aluminum heat sink. The mass airflow sensor
The mass air flow sensor is supplied with battery voltage and has separate power and signal grounds. The signal from the sensor varies from 0 Volts to 5
Since working temperature is relatively high (170°C (338°F)), and the flow and temperature sensitive resistors are mounted on the side of the hot film, a
The engine control module adopts substitute values if the mass air flow sensor signal is missing or faulty.
The mass air flow sensor is located between the air cleaner (ACL) cover and the fresh air intake.
|[PREV PAGE] [NEXT PAGE]|