General description
53. Air flow sensor (MAF) located in the throttle body next to the intake manifold. This sensor is used to measure the amount of air entering the engine. The PCM uses this information to control fuel delivery. The intake of a large volume of air means the need to disperse the car, and a small one means to reduce the engine speed or put it into idle mode.
Examination
54. To check the MAF sensor, start the engine, let it run for at least 1 minute at idle and check if fault code 34 is stored in the unit's memory (see section 3).
55. Turning off the ignition, connect the tester to the electrical contacts of the sensor connector. Set the ignition key to position "ON" (but don't start the engine). Using a voltmeter, measure the voltage at the contact "A" in the speed sensor connector (see illustration). The voltmeter reading should be between 4-6 volts. If the voltage is out of these limits, check the yellow wire going to the contact "A", for a break.
4.55. Measure the voltage at the contact "A" (yellow wire), by connecting the positive terminal of the voltmeter to it. The device should show a voltage of 4-6 V
56. If the voltage on the contact "A" meets the requirements, connect the outputs of the test lamp to the contacts "IN" And "WITH" (ignition key is still in position "ON"). The lamp should light up.
57. If the test lamp does not light, check the pink-black wire going to the contact "WITH", for a break. If the lamp does not light up, have the MAF sensor checked by a workshop.
58. If the sensor is faulty, replace it.
Replacement
59. To replace the sensor, first disconnect its connector.
60. Turn away two bolts of fastening of the gauge to the case of a throttle and take the gauge from a motor compartment.
4.60. Turn away bolts (shown by arrows) air flow sensor and disconnect the sensor from the throttle body
61. The speed sensor is installed in the reverse order.