Contents: Examination ⇓ Replacement ⇓
Air flow sensor (models with a 6-cylinder engine produced before 1997)
The air flow sensor (arrow) is located in the air intake duct.
Air flow sensor (models with a 4-cylinder engine built in 1998)
Examination
1. Remove and clean the sensor. Put it back in place.
2. Check the voltage supply to the sensor.
All 1998 four-cylinder and six-cylinder models
3. Check the voltage between the MAF and GND terminals. On models with a three-terminal connector, with the ignition on and the engine off, the voltage should be 1.0–1.5 volts. At idle, the voltage should be 1.5–5.0 volts.
4. On models with a four-pin connector, the voltage should be close to zero when the engine is off. At idle it should be 0.6-0.7 volts (0.6-1.1 volts on 1998 models).
5. Increase the engine speed and check that the voltage gradually increases to approximately 2 volts.
Models with a six-cylinder engine produced from 1993 to 1997
6. Disconnect the air intake pipe from the sensor. Connect a voltmeter to the MAF and GND terminals of the sensor connection connector. Turn on the ignition. When the sensor flap is closed, the voltage should be 4.0 volts. When the flap is opened, the voltage should change as follows:
- a) the valve is open by 1/4 - 2.4 volts
- b) the valve is open by 1/2 - 1.6 volts
- c) the valve is open by 3/4 - 0.8 volts
- d) the valve is fully open - 0.4 volts
Replacement
1. Disconnect the negative battery cable.
2. Disconnect the sensor connection connector, unscrew the mounting screws or bolts (arrows) and remove the sensor.
The original article is on [MAZBOOK]
3. Installation is carried out in the reverse order of removal.