1988 Nissan Sentra airflowmeter circuit fault

1988 NISSAN SENTRA
133,000 MILES • 4 CYL • FWD • AUTOMATIC
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V9L6N4
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I just purchaced this vehicle knowing the problem.The computer was cleared of faults.I took it out for a test drive,and the car bucked violently.The computer flashed out a"airflow meter/ground circuit".I noticed that someone before me added a ground wire into the airflow meter wiring harness. I cleaned and replaced the engine compartment grounds,that I could find,then tested the airflow meter both in and out of the car,the meter is OK.
It seems as though computer is not recieving the signal from theairflow sensor
Nov 5, 2008 at 8:32 PM
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MHPAUTOS
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Hi there,

You will have to start with back probing the air flow meter pins back to the ECU, check for continuity and high resistance, start here.

Mark (mhpautos)
Nov 5, 2008 at 8:38 PM
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V9L6N4
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give me a couple of days,i'll get back to you
Nov 5, 2008 at 9:09 PM
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V9L6N4
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I need the wiring diagram from the ECU to the airflow meter
re;1988 nissan sentra 1.6litter TBI FWD Sedan
Nov 6, 2008 at 7:59 PM
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MHPAUTOS
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Hi there,

I have lost access to the data base just now, but i will contact another tech to get this info for you asap.

mark (mhpautos)
Nov 6, 2008 at 8:07 PM
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V9L6N4
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marks tech buddy have the diagram?
Nov 6, 2008 at 9:19 PM
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MHPAUTOS
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He has access to Mitchell 1 this is our reference data site, i have lost access for some reason, i have Emailed him to send you the information.He normally comes on line a few times every day.

mark (mhpautos)
Nov 6, 2008 at 9:27 PM
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RASMATAZ
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Give me your email addy-sending it here -it'll be blurry/unreadable.


https://www.2carpros.com/forum/automotive_pictures/12900_mas_airflow_1.jpg

Nov 7, 2008 at 5:14 AM
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V9L6N4
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rasmataz requested my e-mail addy: [email protected]
Could you sent the diagram through e-mail so I con see it more clearly
thanks, rick
Nov 7, 2008 at 6:47 PM
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RASMATAZ
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Its done let me know.
Nov 7, 2008 at 9:03 PM
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V9L6N4
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My request for the diagram didn't come through.
Could rasmataz please try again.
[email protected]
Nov 8, 2008 at 9:27 AM
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V9L6N4
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The diagram came through my e-mail !
Give me a few days,and I will diagnose the wiring harness.
Thanks,Rick
Nov 8, 2008 at 2:01 PM
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V9L6N4
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Now I have tested the air flow meter,and the wiring harness.The harness wires all had the same resistance.What do you sugest doing next?
Nov 9, 2008 at 12:36 PM
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MHPAUTOS
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Hi there,

If all is OK in the loom, i feel it is time to get the ECU tested, you may be getting an internal fault there.

Mark (mhpautos)
Nov 9, 2008 at 1:44 PM