MASS AIR FLOW SENSOR
The mass air flow sensor is placed in the stream of intake air. It measures the intake flow rate by measuring a part of the entire intake flow. The MAF sensor controls the temperature of the heater in sensing element to a certain amount. The temperature distribution around the heater changes according to the increase in intake air volume. The change is detected by a thermistor and the air volume data is sent to ECM by the MAF sensor.
INTAKE AIR TEMPERATURE SENSOR
The intake air temperature sensor is built-into mass air flow sensor. The sensor detects intake air temperature and transmits a signal to the ECM.
The temperature sensing unit uses a thermistor which is sensitive to the change in temperature.
<Reference data>
| Intake air temperature [°C (°F)] | Voltage* (V) |
| 25 (77) | 1.9 – 2.1 |
| 80 (176) | 3.0 – 3.2 |
*: These data are reference values on the diagnosis tool.
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