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Driver head light won't stay on / no rear differentail traction

Help, Advice, Owners' Discussion and DIY Tutorials on Volvo XC90s. The XC90 proved to be very popular, and very good for Volvo's sales numbers, since its introduction in model year 2003 (North America).
vflxc
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Joined: Tue Jan 15, 2019 5:42 am
Year and Model: 2008 xc 90 v-8
Location: Chicago
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Driver head light won't stay on / no rear differentail traction

Post by vflxc » Tue Jan 15, 2019 5:51 am

Hi everyone. I was locked out of my account I'm formally vflxc90.Looking for some help. My 2008 V-8 driver headlight won't stay on. It has the Xenon lights. The light will stay on for about the 1st. minute after starting the xc. If I turn off the xc and re start it repeats every time, stays on for the 1st. minute. I replaced the bulb. Same issue. I flipped the light assembly's driver to passenger, passenger to driver. Same issue occurred. Driver side went off after 1 minute. Based on above I've eliminated the bulb, and ballast . From the research I've dome it might be the central electronic module. There is a known issue were the module will take on moisture and short out.
Differential is not kicking in when it should. We had recent snow. I pulled the xc into the snow , there was power to the front wheels but no action out of the rear differential. There are no messages on in the dash indicating anti skid etc. I drove it down a windy road that was covered in snow and the xc tracked as it should. I tried to fishtail and the rear wheels sensed the slippage and applied the brakes to the slipping wheel .
I can get the xc scanned I hooked up a Matco scanner and it didn't show any codes. The dealership wants $156 for the 1st. hour to diagnosis the issue. I can pull the module and have it re manned for around $400. Just trying to see if anyone else has had a similar issue, or do we have a Volvo tech. in the forum who can point me in the right direction. I purchased the 2008 a few months ago, Everything worked as it should at the time of the purchase.
We noticed the driver light coming on off when it was parked with no key in the ignition and the next day the battery was drained. I put in a new battery and still had issues with light, and seems the rear diff. issue started after the battery issue.
Thanks
xflxc90

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ggleavitt
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Year and Model: XC90 05-2.5T, 08-V8S
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Re: Driver head light won't stay on / no rear differentail traction

Post by ggleavitt » Tue Jan 15, 2019 7:16 am

Angle gear is working? Could try https://forums.swedespeed.com/showthrea ... ical-Check as a start.
2005 2.5T AWD-192k
2008 V8 AWD Sport-121k

vflxc
Posts: 7
Joined: Tue Jan 15, 2019 5:42 am
Year and Model: 2008 xc 90 v-8
Location: Chicago
United States of America

Re: Driver head light won't stay on / no rear differentail traction

Post by vflxc » Tue Jan 15, 2019 5:41 pm

Thank you for the reply :ggleavitt

I checked the drive shaft per your instructions. Mine turns. Seems I have a broken coupler. I talked to fcp and they indicated this part fails more often then the input shaft in the angle gear. My angle gear makes no noise which might be an indicator the coupler broke clean. If the splines on the shaft were worn then I would have noise from the angle gear coupler skipping over the splines making a banging noise.

I looked into the Central Electronic Module (CEM) issue. I spoke to three different rebuilders and they all feel the CEM is likely the issue. Since the CEM supplies the power to lights etc. Seems there is a separate wire from the CEM to each light. Driver light circuit from the CEM being the issue. As mentioned in my post the driver light was flicker on off when the vehicle was parked.
The reman CEM is around $350 with shipping from BBA remann. The coupler around $150.
I looked for some info on pulling the angle gear so far didn't find anything for the XC90.
Looks like I'm going to have a busy spring.
Thanks for the help
vflxc90

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Year and Model: 2008 XC90
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Re: Driver head light won't stay on / no rear differentail traction

Post by Masscomguru » Tue Jan 15, 2019 6:36 pm

So the DS spins freely when the car is parked? If so, it’s the angle gear. If it were the CEM (or any electric component) you would have a light.

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ggleavitt
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Re: Driver head light won't stay on / no rear differentail traction

Post by ggleavitt » Wed Jan 16, 2019 12:19 am

Really a pretty quiet failure when it happens, why I wrote what I wrote, to make things easier to diagnose. Should be the first thing to check in my opinion when you think the car is acting like an older model FWD.

Can see my personal story- https://forums.swedespeed.com/showthrea ... gle-Gear-) , your signature notes that your car is also a V8. This means a TF-80SC with a hardened sleeve and more contact points which in my case meant not just sleeve but gear as well. I think that for the 5 speed, there were some suggestions of sleeve before gear, but as was my case, both sleeve and input spline were stripped.

See the photo links in the thread to give you an idea, entirely probable this is your story. I'll say now that I feel your pain and I'll say to the person who chimes in shortly about "leaving it FWD", they have never driven a V8 with a non-working bevel gear. Not pleasant at all, always have to watch out not to give it too much gas and spin the fronts. No fun, especially when it's wet out.

Pulling bevel is in VIDA, couple references on MVS to get it working so you can see what's what. There's also a open site of sorts on the internet requiring pressing banners and the like that has most of the instructions.

I wish you good luck with your repair(s).
2005 2.5T AWD-192k
2008 V8 AWD Sport-121k

vflxc
Posts: 7
Joined: Tue Jan 15, 2019 5:42 am
Year and Model: 2008 xc 90 v-8
Location: Chicago
United States of America

Re: Driver head light won't stay on / no rear differentail traction

Post by vflxc » Wed Jan 16, 2019 5:06 am

Thank you for all the information.
I own 3 xc 90 v-8's. Son's (2006) 235,000, Daughter (2006) 140,000 , Spouse (2008) 157,000. We really like them . With all the information out there it looks like I'm going to be very busy when the weather clears up in Chicago.

vflxc
Posts: 7
Joined: Tue Jan 15, 2019 5:42 am
Year and Model: 2008 xc 90 v-8
Location: Chicago
United States of America

Re: Driver head light won't stay on / no rear differentail traction

Post by vflxc » Wed Jan 16, 2019 5:18 am

I looked into a used angle gear at car-part.com
It is also know as transfer case in the salvage yards. The salvage yard indicated the v6 3.2 angle gear is the same as the v-8. Does any know if that is correct?

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ggleavitt
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Re: Driver head light won't stay on / no rear differentail traction

Post by ggleavitt » Wed Jan 16, 2019 9:07 am

I believe the answer is no but I'll be happy if you prove me wrong.

For the 3.2:
Angle gear, exch 1.00 EU 36002052 EXCH FOR 31325886

For the V8:
Angle gear, exch 1.00 EU 36000800 CH -371186, REPL 1 PCS 36000799, 1 PCS 31256041, 1 PCS 30735111, 2 PCS 982818, 4 PCS 982819.
Angle gear, exch 1.00 EU 36000625 CH -371186, EXCH FOR 30735599, 30735600, 30759673, 30759874
Angle gear, exch 1.00 EU 36002443 CH 371187-, REPL 1 PCS 36002441, REPL 1 PCS 31256041, REPL 1 PCS 30735111, REPL 2 PCS 982818, REPL 4 PCS 982819.
Angle gear, exch 1.00 EU 36002051 CH 371187-, EXCH FOR 30783422, 30783423, 30783424, 31219634, 31219635, 31219636, 31256296, 31256171

Some models (like mine) required the additional bracket, heat shield, and hardware to accommodate the newer style 36002051 angle gear.

As far as going with "used", if you can find a V8 angle gear with solid input splines, go for it. A review of the photos that I (and others) have posted suggests that the wear is on both sleeve and spline, reason I bit my tongue and bought the Volvo exchange part.

Last but not least, if you have 3 Volvos, no reason not to have a copy of VIDA with or without a DICE handy. You can find a few links on this and other sites for a VM image if you do not want to go with a dedicated laptop. In any event, you're missing out on a ton of technical and parts information without this tool.

Good luck with your repair.
2005 2.5T AWD-192k
2008 V8 AWD Sport-121k

vflxc
Posts: 7
Joined: Tue Jan 15, 2019 5:42 am
Year and Model: 2008 xc 90 v-8
Location: Chicago
United States of America

Re: Driver head light won't stay on / no rear differentail traction

Post by vflxc » Thu Jan 17, 2019 6:41 am

Thank you for all the detailed information. With the suppport from the Volvo family it makes ownership more feasible. :)
I've been lucky so far with the Volvo's. I've been able to do the repairs myself. Alternators, starters, brakes, wheel bearings, serpentine belts, pulleys, repair to front engine cover due to pulley sheering off, recent haldex service with filter. Etc. I'm in it for the long haul. So time to educate myself for the next round of repairs. I agree, need to look into Vida/dice. Just thought the cost was pricy? So far I've been able to stay out of the dealership. I also own a 2003 V70 2.5 non turbo.
Thanks again

vflxc
Posts: 7
Joined: Tue Jan 15, 2019 5:42 am
Year and Model: 2008 xc 90 v-8
Location: Chicago
United States of America

Re: Driver head light won't stay on / no rear differentail traction

Post by vflxc » Sat Jan 19, 2019 6:14 am

Saving this as a refrence for AOC: The AOC clutch (PN 36000565, exch) is specific to the XC90 05-08 for V8 and 07-08 for 3.2, I’m “guessing” it's a Gen III so if at some point the entire AOC unit needs replaced, grab used from any car noted previously. The pressure sensor 30759668 can also be replaced separately for this version of Haldex (needs kit 30783288) if it’s part of the problem.

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