9-volt vane air flow meter?

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joeyoone
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Joined: Tue Sep 07, 2010 8:44 pm

9-volt vane air flow meter?

Post by joeyoone » Tue Sep 07, 2010 8:46 pm

I have a 1990 Mazda MPV 3.0L 2WD.

This is my first time encounter with this vehicle. The voltage reference (VR) from the vane air flow meter is 9 volts. The battery signal (VB) at the airflow meter harness is okay (14volts). A throttle snap test confirms the meter is responding appropriately as a 0-5 volt meter, however with the exception of it idling at 5 volts and stepping through 9 volts during the throttle snap test.

I’ve tested a second junker air flow meter with the same results. Before I purchase a new meter, can someone confirm for me if this vehicle uses a 9 volt reference signal for the vane air flow meter? None of my documentation mentions this. Many thanks.

rod_au
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Joined: Sun Aug 08, 2010 10:11 pm

Re: 9-volt vane air flow meter?

Post by rod_au » Wed Sep 08, 2010 9:14 am

joeyoone wrote:I have a 1990 Mazda MPV 3.0L 2WD.

Before I purchase a new meter, can someone confirm for me if this vehicle uses a 9 volt reference signal for the vane air flow meter? None of my documentation mentions this. Many thanks.
Called Air Flow Meter Voltage Divider Reference, with Ignition ON you should have 7 to 9 Volts.

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