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How Do I check the MAF with a Multi meter HDI 90
Posted: Mon Mar 08, 2021 1:59 pm
by brillo21
Hi
I am having a intermittent fault with my 2003 406 HDI 90 Manual, when driving between 60 -70 mph it sometimes momentarily looses power almost cuts out and then recovers and drives normally, I have looked at several posts on here and it seems it is possible to check the MAF with a Multi meter, but not any note of the procedure or the readings that should be expected when testing
If anyone has this knowledge I would be grateful for the details
Thanks in advance for any help
Regards
Marc
Re: How Do I check the MAF with a Multi meter HDI 90
Posted: Mon Mar 08, 2021 2:05 pm
by steve_earwig
It's probably easier to disconnect it and then see how the car drives.
(i.e. errr, I don't know
)
Re: How Do I check the MAF with a Multi meter HDI 90
Posted: Mon Mar 08, 2021 5:49 pm
by GingerMagic
Yeah, I would just disconnect it first to see if things improve, and if they do then you have found the culprit.
Re: How Do I check the MAF with a Multi meter HDI 90
Posted: Tue Mar 16, 2021 7:17 pm
by brillo21
Hi thank you for the replies suggesting disconnecting the MAF and see how it drives but I was looking for a more concrete way to diagnose the issue.
After much research I have found the figures and procedure that allow you to check the 5WK9621 Siemens MAF and I would be happy to share this, but unfortunately I can not seen to upload the PDF file to my post, If anyone can instruct me how to upload a PDF I would be grateful
Best Regards
Marc
Re: How Do I check the MAF with a Multi meter HDI 90
Posted: Tue Mar 16, 2021 7:21 pm
by steve_earwig
It looks like Google drive is the place, providing the file isn't enormous...
Re: How Do I check the MAF with a Multi meter HDI 90
Posted: Tue Mar 16, 2021 7:25 pm
by brillo21
Can I not just insert it in the actual reply somehow ?
Re: How Do I check the MAF with a Multi meter HDI 90
Posted: Tue Mar 16, 2021 7:34 pm
by steve_earwig
I'm afraid not, I guess this forum, like most of them, is only geared up for pictures. I suppose it would fill up if it allowed everything
I'd think you have a Gurgle account of some sort, it seems like you can't avoid the damn crooks. Failing that email it my way and I'll upload it. It sounds like something we should have so well done for tracking it down.
Re: How Do I check the MAF with a Multi meter HDI 90
Posted: Tue Mar 16, 2021 9:28 pm
by Doggy
I would be interested to see that too.
I have looked at the readings on good and faulty MAF units via PP2000 - in my experience a faulty unit will usually display a slightly higher air flow at idle, but will also show a reduction in air flow initially as you gently raise the idling speed. Beyond this the values then rise as normal with engine speed.
Re: How Do I check the MAF with a Multi meter HDI 90
Posted: Tue Mar 16, 2021 9:52 pm
by brillo21
I hope this will upload as a JPG
Please let me know if it works
Regards
Marc
Re: How Do I check the MAF with a Multi meter HDI 90
Posted: Tue Mar 16, 2021 11:50 pm
by steve_earwig
That'll do nicely
I tampered with your post so it appears as a picture. I'll post it to the KB once when I'm not half asleep.
Re: How Do I check the MAF with a Multi meter HDI 90
Posted: Wed Mar 17, 2021 11:02 am
by brillo21
Ok thanks for making it visible, what's the KB
Best Regards
Marc
Re: How Do I check the MAF with a Multi meter HDI 90
Posted: Wed Mar 17, 2021 11:09 am
by steve_earwig
Not a problem
That would be the knowledge base
All I have to do now is remember how to copy a thread there...
Re: How Do I check the MAF with a Multi meter HDI 90
Posted: Wed Mar 17, 2021 1:16 pm
by Doggy
Great stuff gentlemen.
Any chance of locating similar info for the following?:
2.2 HDi 406 - 1920 AG / 5WK9628 or 5WK9628Z, (also fits older 2.0 HDi Citroen C5).
2.0 407/Citroen C5 X7 - 1920 HH / 5WK97002
2.2 407/Citroen C5 X7 - 1920 LK / 5WK97015
Re: How Do I check the MAF with a Multi meter HDI 90
Posted: Wed Mar 17, 2021 6:25 pm
by steve_earwig
I'm wondering if these are actually in the Service Box back-up repair manual. I never found much of anything that was useful in there mind.