Check the quality of the mass. To do this, switch off the ignition and connect an ohmmeter to pin 4 (for a 124 hp engine: to pin 6) and mass. Required value: 0 ohm.
Check supply voltage To do this, turn on a voltmeter between terminal 6 and ground. Turn on the ignition. Required value: 4.5-4.9 V.
Switch off the ignition.
Check sensor resistance To do this, connect an ohmmeter to pins 4 and 6 (124 hp motor: pins 6 and 8) air mass meter connector.
Required values
- 0°C - 6.0 kOhm
- 20°C - 2.7 kOhm
- 80°C - 0.4 kOhm
Measure the resistance by heating the sensor with a hair dryer. As the temperature rises, the resistance should decrease. In case of deviations from the required values or if the resistance remains constant during heating, replace the air mass meter.