Audi Q7 4.2tdi Battery Test Pico Software

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MHAuto
Newbie
Posts: 2
Joined: Fri Nov 15, 2019 1:07 am

Audi Q7 4.2tdi Battery Test Pico Software

Post by MHAuto »

Hi all,
I have an Audi Q7 4.2 tdi v8 in the workshop at the moment that has a slow start when cold and even slower start when hot, When cranking it drops mmi screen out and flashes and struggles badly if not glowed for 5 secs.
The car has had 2 new batteries in the last 6 months (one new one by us just now).
I took a battery test with the bad car and had a similar Q74.2 tdi in the workshop that I took a reference test off that was starting perfect. i'll put up both waveforms.

I haven't used this software before and need a little guidance.
Attachments
Audi Q7 Good 4.2 tdi.png
Audi Q7 Bad Start 4.2tdi.png
Audi Q7 Battery test good known 4.2TDI 2008 BTR.pddata
Good Start
(535.69 KiB) Downloaded 334 times
Audi Q7 batt test 2.pddata
Poor cranking, slow start
(484.2 KiB) Downloaded 308 times

liviu2004
TwoWaves
TwoWaves
Posts: 474
Joined: Sat Mar 19, 2016 8:23 am
Location: Netherlands

Re: Audi Q7 4.2tdi Battery Test Pico Software

Post by liviu2004 »

I find 11.8V as initial voltage way too low.

MHAuto
Newbie
Posts: 2
Joined: Fri Nov 15, 2019 1:07 am

Re: Audi Q7 4.2tdi Battery Test Pico Software

Post by MHAuto »

They are both very similar, one at 11.9 and one at 11.8, one starts perfect, one doesn't.
On the bad starting car I noticed the max current was a lot lower. ?????

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JoaoGaudencio
Newbie
Posts: 9
Joined: Tue May 14, 2019 8:41 am

Re: Audi Q7 4.2tdi Battery Test Pico Software

Post by JoaoGaudencio »

Hi,

The starter works ok?

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