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1988 Nissan Sentra airflowmeter circuit fault

Tiny
V9L6N4
  • MEMBER
  • 1988 NISSAN SENTRA
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 133,000 MILES
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
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Wednesday, November 5th, 2008 AT 8:32 PM

13 Replies

Tiny
MHPAUTOS
  • MECHANIC
  • 31,937 POSTS
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)
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Wednesday, November 5th, 2008 AT 8:38 PM
Tiny
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Give me a couple of days, i'll get back to you
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Wednesday, November 5th, 2008 AT 9:09 PM
Tiny
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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
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Thursday, November 6th, 2008 AT 7:59 PM
Tiny
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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)
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Thursday, November 6th, 2008 AT 8:07 PM
Tiny
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Marks tech buddy have the diagram?
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Thursday, November 6th, 2008 AT 9:19 PM
Tiny
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  • MECHANIC
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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)
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Thursday, November 6th, 2008 AT 9:27 PM
Tiny
RASMATAZ
  • MECHANIC
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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

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Friday, November 7th, 2008 AT 5:14 AM
Tiny
V9L6N4
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  • 12 POSTS
Rasmataz requested my e-mail addy: rix@island. Net
Could you sent the diagram through e-mail so I con see it more clearly
thanks, rick
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Friday, November 7th, 2008 AT 6:47 PM
Tiny
RASMATAZ
  • MECHANIC
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Its done let me know.
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Friday, November 7th, 2008 AT 9:03 PM
Tiny
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My request for the diagram didn't come through.
Could rasmataz please try again.
Www. Rix@island. Net
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Saturday, November 8th, 2008 AT 9:27 AM
Tiny
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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
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Saturday, November 8th, 2008 AT 2:01 PM
Tiny
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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?
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Sunday, November 9th, 2008 AT 12:36 PM
Tiny
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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)
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Sunday, November 9th, 2008 AT 1:44 PM

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