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How do i test the coils and mass air flow sensor?

1989 nissan d21 hardbody i want to test the coil and mass air flow sensor.

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  • Nissan Master
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On the coil, primary resistance should be 0.8 to 1.0 ohms. Secondary resistance should be 7.6 to 11.4 ohms.

I don't think this model/year used a mass air flow sensor - there is no reference to it in either general information regarding the ECCS (electronic control system), or testing of ECCS components in the Haynes manual.

Posted on May 01, 2017

  • Joe Russell May 02, 2017

    can you check and see do this model/year use a mass air flow sensor? there is a part mount on the left side of the throttle body have three screws in it it is about 3 or 4 inches long square what could this part be?

  • old marine
    old marine May 02, 2017

    The KA24E (4 cylinder) engine, used from 1990 on, with MPFI uses an 'air flow meter'attached to the left side of the throttle body. The Haynes manual provides no information on testing this unit.
    The V6 engine with MPFI also uses an air flow meter, but it is located near the air filter, before the air goes through the duct to the throttle body.
    The description of what this unit does would indicate it is the same thing as a MAF sensor. Without any other guidance, you can check that the heated wire is very clean. (On current systems, if you disconnect the MAF and the engine runs better, it MAY be an indication of a bad MAF.)

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Posted on Jan 02, 2017

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http://www.autocodes.com/make/nissan

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