Contents: Checking and removing ↓ Installation ↓
Warning: Before performing repair work, read the precautions for repairing the engine management system (see "Precautions when repairing the engine management system").
To perform repair work on checking and replacing the MAF sensor, you will need a multimeter (in voltmeter mode).
Checking and removing
1. We are preparing the vehicle for repair work (see points 1 and 2 "Preparing a car for maintenance and repair").
2. Press the locking device of the MAF sensor connector.
Disconnect the wiring harness connector from the mass air flow sensor.
3. Connect the "negative" probe of the voltmeter to the "mass" (to the engine).
4. Turn on the ignition and use a voltmeter to measure the supply voltage at terminal 2 of the wiring harness connector (the terminal numbering is done on the MAF sensor).
Note: The voltage at the terminal must be at least 12 V. If the voltage does not reach the connector or is less than 12 V, then the battery is discharged, the power supply circuit is faulty, or the ECU is faulty.
5. Using a voltmeter, measure the supply voltage at terminal 4 of the wiring harness connector.
Note: The voltage at the terminal should be about 5 V. If the voltage is not normal, then the sensor power supply circuit is faulty or the ECU is faulty.
6. Loosen the clamp and disconnect the hose from the sensor.
7. Using a 10 mm socket wrench, unscrew the two bolts securing the mass air flow sensor.
8. Remove the sensor from the car.
Recommendation: You can verify that the mass air flow sensor is faulty by replacing it with a known good one.
Installation
We install all removed parts on the car in the reverse order of removal.
The original can be found on the website [VAZbook.ru]