MAF signal (mass air flow sensor) is a direct current voltage, the value of which depends on the amount and direction of air movement passing through the sensor.
The mass air flow sensor has a built-in air temperature sensor, the sensitive element of which is a thermistor installed in the air flow. At low temperatures, the resistance of the mass air flow sensor is high, and at high temperatures, it is low (Table 9.6).
If the air temperature sensor is faulty, the controller stores the error code in memory and turns on the alarm, while the readings of the faulty sensor are replaced by the controller with a fixed air temperature value of 33°C.
To replace the MAF (mass air flow sensor) on the car you will need: a 10 mm spanner and a Phillips-head screwdriver.
[Original text on the website: LADAMAN]
1. Disconnect the wire from the negative terminal of the battery.
2. Using a screwdriver or your finger, press the plastic latch from below and disconnect the wire harness connector from the mass air flow sensor. Loosen the clamp and disconnect the air supply hose from the MAF sensor (mass air flow sensor). Unscrew the two mounting screws and remove the MAF (mass air flow sensor) from the air filter.
3. Install the MAF on the vehicle (mass air flow sensor) in reverse order. Pay attention to the condition of the rubber gasket, as its damage can lead to interruptions in engine operation.
Table 9.6. Dependence of the air temperature sensor resistance on the intake air temperature (permissible error 10%)
| Intake air temperature,°C | Resistance, Ohm |
| -40 -30 -20 -10 0 +10 +20 +30 +40 +50 +60 +70 +80 +90 +100 +110 +120 | 39,2 23 13,9 8,6 5,5 3,6 2,4 1,7 1,2 0,84 0,6 0,45 0,34 0,26 0,2 0,16 0,13 |