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Bcm or ?

Help, Advice, Owners' Discussion and DIY Tutorials on Volvo's stylish, distinctive "P2" cars.
2001 - 2007 V70
2004 - 2007 V70 R
2001 - 2007 XC-70
2001 - 2009 S60
2003 - 2007 S60 R
836howard
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836howard

Bcm or ?

Post by 836howard » Fri Feb 22, 2019 4:01 pm

When hooked up to the scanner i get errors on the following modules.

Steering wheel module
Accessory electronic module
Suspension module
Steering angle sensor
Anti lock brake system

Dont know where to start with this thing i need to get awd working



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SuperHerman
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Re: Bcm or ?

Post by SuperHerman » Sat Feb 23, 2019 5:01 pm

I have not dealt with this on an XC70, but have on an XC90. I would start by looking at every module and check connections and look for signs of water intrusion. Other than the AEM - the rest of the modules are all related to the AWD system. So if one goes down it takes out the rest.

Which scanner did you used? Did you try the onboard diagnostic (it may add some insight)? VIDA maybe more helpful for figuring out which module is having the issue - as the system is connected together one fault takes out the chain.

Best place too look for now is at the physical modules to see if you find any clues. Also - when did the fault surface - any details would help.
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precopster
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Re: Bcm or ?

Post by precopster » Sat Feb 23, 2019 9:27 pm

If you're having trouble with AWD you need a scanner that can acess the DEM module which is located on the rear differential assembly.

Vida/Dice mated to a Windows laptop is the easiest system costwise for a DIYer to access.


Current cars:2002 XC70, 2001 V70 T5, 2006 XC90 2.5T, VW Transporter 2.5TDI

www.precisioncarmodules.com.

836howard
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Re: Bcm or ?

Post by 836howard » Sun Feb 24, 2019 6:59 am

ImageI bought the car with a blown motor so i had the motor replaced. And all this is on so i can't tell if it was something we did or was on previously. I used a buddys mentor touch scout to read the codes. I attach pics of all the things i read. Also i could overlook most the other things as long as i could get awd. Is there anyway to bypass it and just have full time awd.
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SuperHerman
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Re: Bcm or ?

Post by SuperHerman » Fri Mar 01, 2019 7:30 pm

First does the engine run and does the car drive? Any comments on these items would help.

Did you clear all the codes? How is the battery? Fully charge the battery, clear the codes and see what comes back. Some of the codes may be from a dying or low battery.

Also try running the onboard diagnostic and report what errors it reveals.

Report back either way.



836howard
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Re: Bcm or ?

Post by 836howard » Fri Mar 01, 2019 7:45 pm

Car runs and drives fine. I just put in a brand new battery in it last week. I do need to swap the alternator because the one on it is from an 04 and the car is an 05 so the regulator is for the wrong year and it throws the battery light.



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SuperHerman
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Re: Bcm or ?

Post by SuperHerman » Fri Mar 01, 2019 7:55 pm

Did you clear the codes after the battery replacement? Were the new codes all the same?

Did you try the onboard diagnostic? See here: https://steemit.com/cars/@novaswe/hidde ... -s80-00-07

This will tell you high level whether the computer is able to talk the the various modules. It is a starting place.



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Re: Bcm or ?

Post by veektor » Sat Mar 02, 2019 10:01 am

836howard wrote:
Fri Mar 01, 2019 7:45 pm
Car runs and drives fine. I just put in a brand new battery in it last week. I do need to swap the alternator because the one on it is from an 04 and the car is an 05 so the regulator is for the wrong year and it throws the battery light.
I would get that replaced pronto. When I picked up my '08 S60 it would drain the battery in a couple of days just sitting around. It also had that battery light you mentioned (charging system service required). When poking around the engine bay on a quiet evening, I noticed a teeny buzzing sound from the alternator area, which stopped when I pulled the negative cable from it. That stopped draining the battery. I found a sticker on the alternator, and it was pre-2005 version. I can't say if the regulator got damaged because it was the wrong model, or if it was just bad on its own, but my anecdotal evidence suggests that wrong alternator can cause a serious battery drain.



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Re: Bcm or ?

Post by precopster » Sat Mar 02, 2019 1:41 pm

The wrong regulator can disturb the Canbus signals. I doubt all those codes will return with the correct regulator once cleared .


Current cars:2002 XC70, 2001 V70 T5, 2006 XC90 2.5T, VW Transporter 2.5TDI

www.precisioncarmodules.com.

836howard
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836howard

Re: Bcm or ?

Post by 836howard » Sat Mar 02, 2019 2:34 pm

Can i just put a regulator on it or do i need a whole alternator



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