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Have a few messages I'm not sure about!

A mid-size luxury crossover SUV, the Volvo XC90 made its debut in 2002 at the Detroit Motor Show. Recognized for its safety, practicality, and comfort, the XC90 is a popular vehicle around the world. The XC90 proved to be very popular, and very good for Volvo's sales numbers, since its introduction in model year 2003 (North America). P2 platform.
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motherof5
Posts: 4
Joined: 30 September 2015
Year and Model: volvo xc90 2004
Location: princeton

Have a few messages I'm not sure about!

Post by motherof5 »

I own a 2004 Volvo with 121miles on it and I have just replaced my battery and alternator and now I have Brake Assist service and Engine System Service has anyone else had this issue and could help me with this, didn't have these two until the alternator went out, Also been having and issue with my side brake lights, was told it was the brake module so I'm thinking that's were the brake assist service is coming from (not sure tho) Also have a Anit-Skid service message this has been there a few month.
Thanks in advance
Bobbie!

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FLXC90
Posts: 1132
Joined: 18 August 2014
Year and Model: 98 V70 T5
Location: Florida Panhandle
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Post by FLXC90 »

Which engine does your 90 have, 5 or 6 cylinder. Is it AWD?

When the alternator and battery were done, was it at a Volvo dealer or Volvo savvy independent? There is a protocol to follow when reconnecting the battery in these. Supposed to have key in pos II I believe.

Brake system message- this is actual brake system, so it's critical. Check Xemodex channel on youtube, I believe they have a video for BCM removal/installation. You may be able to pull it, clean the contacts, and plug it back in. If not, you will know how to replace it yourself!

ABS notice, do you have a sunroof? If so, the drains can clog, spilling water under the floor on the passenger side. Problem is, that's where the yaw sensor lives. If it corrodes, it takes out yaw portion of DSTC, as well as AWD and some anti-skid functionality. Other problem is that the relay costs $500 new!

I wish these showed up in the pick n' pull yards, but they aren't here in Florida.
Current Volvos:
1998 V70 T5, 112k sat 5 years, still in mechanical coma (finally at the top of the pile )
2004 XC90 T6 AWD: 186k, 60 on transaxle ( traded in )
1998 POS70 N/A: DD/training aid, 236k but really about 240k, I think...ABS module( passed on to son who sold it)

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