1. Before checking the proper gauge MAF, make sure of serviceability of giving him food and appreciate the quality of the grounding.
2. Disconnect the MAF sensor wiring. And connect the positive lead of the voltmeter to the terminal black and white (1993 and 1994) / red (1995) wire connector. The negative probe to ground to ground. Turn on the ignition (the engine do not start), - the meter must register voltage close to the voltage of the battery, otherwise, check the condition of the relay ECCS and chains corresponding electrical circuit (see. The wiring diagram at the end of the Head the Onboard electric equipment).
3. On models 1993 and 1994 Vol. Check the grounding terminal black wire harness - there should be a conductivity of the ground.  | 4. Restore initial connection of wiring to the MAF sensor probe and probe the positive terminal of the voltmeter white wire to the back of the pin (negative lead of the voltmeter to earth ground) (see chap. Onboard electric equipment). With the ignition (the engine do not start) there must be a voltage of about 0.5 (1993 and 1994) /1.0 (1995) B. |
5. Run the engine at idle speed and measure again - this time, the instrument must register reading 1.0 ÷ 1.7 V. With increasing engine speed signal voltage should also increase (up to 3.0 V). Unfortunately, in a garage to simulate the operation of the engine under load it is not possible, however, the above-described voltage dependence of revolutions must be traced very clearly.
6. The positive results of the above tests confirm serviceability of the gauge MAF. Now, check the wiring of the sensor circuit for signs of continuity. If any deviations can not be identified, the car should be driven away on a car repair shop for diagnostics and related reconditioning PCM.  | Deeper diagnosis sensor MAF (some deviations can not be detected by a voltmeter) may also be made in a service station. |
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