Last post on Jan 30, 2012 at 10:16 AM
You are in the Volvo XC70 Maintenance & Repair
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Volvo XC70, Lights, Electrical, Wagon
#5 of 22 Re: 2005 XC70 electrical failure [cdonovan]
May 04, 2006 (7:18 am)
I took the car back to the dealer on 4/28 for the fifth time; they have replaced just about every module and relay in the car since they all are fried by the time I limp the car back to them with nothing electrical inside working.
After I threatened them with Lemon Law and called Volvo Customer Service, the mechanic was finally given permission by corporate to driving the car to and from work (50 miles each way). His quote was, " I was cruising along with the nav up listening to the radio, this XC is a really nice drive. Then, WHAM out of no where the car instantanously cut off and then came back up in a split second. It scared the beejesus out of me."
They are searching for wire diagrams, maybe now they will find the root cause or get me a new car in exchange.
#6 of 22 Battery discharges:key off and removed overnight
Aug 27, 2006 (12:06 pm)
Unexplained dead battery-recharged battery and alternator test OK.
Engine fan goes on automatically up to 2-3 hours (observed) despite Volvo service alleging should only happen within 1/2 hour if engine remains hot?
Could this be cause of battery run down?
Any suggested fix?
2001 70XC 3500 miles
#7 of 22 Re: Battery discharges:key off and removed overnight [johns5]
Aug 28, 2006 (12:51 pm)
Correction to my original post:
47500 miles V70XC 2001
Sorry for the incorrect info.
Local repair shop researched Volvo bulletins and website after checking battery and alternator. Cannot establish link between engine fan running after key turned off and removed and compartment fan blowing at full blast.
When discovered both fans are retired by ignition key ON, then OFF.
When not discovered may have caused dead battery several times recently/
#8 of 22 Re: Battery discharges:key off and removed overnight [johns5]
Sep 06, 2006 (1:51 pm)
2001 V70 XC 45k
I just observed the same thing, all the interior fans at full blast on without a key in.
I am also having troubles with my battery. I am about to put the third battery in. I am not sure whether it is caused by the lift-gate not completely latched (does not close that well) draining the battery.
#9 of 22 Re: Battery discharges:key off and removed overnight [knkaiser]
Sep 06, 2006 (7:29 pm)
The alarm just starts on without any reason...not even a thunder storm nearby ¿ Anybody has experienced anything like that????
#10 of 22 Re: 2005 XC70 electrical failure [cdonovan]
Jan 24, 2007 (6:32 am)
I have a 2004 S80 T6 with 35,000 miles and I too have had the exact same problem with my vehicle. I was driving in the early morning about 2 hours into my drive at 55 mph, and I heard a thud. Then the message center reported my left rear door was open, and when I tried to lock the doors, the locks repeatedly bounced. After driving a few more minutes, the interior lights illuminated, then the radio, climate control, gauges, and all lighting failed. I also lost power assist to the steering and the brakes and the car felt like it was lurching. The message center was the only illumination in the vehicle and it continuously popped error messages (ABS, SRS, DTSC, Brakes, etc.). I stopped the car and restarted it immediately and the problem persisted. To date, no on has been able to diagnose the failure cause.
Please note that I have had similar issues on long drives, but never as severe as the one listed.
My big questions are did Volvo ever repair your XC70 and what dealership performed the work?
#11 of 22 Re: Battery discharges:key off and removed overnight [johns5]
Jun 03, 2007 (9:07 am)
We have EXACTLY the same problem with fan starting & hot air blowing after engine is turned off -- Did you find a fix??
#12 of 22 Re: Battery discharges:key off and removed overnight [jfremeau]
Jul 03, 2007 (11:55 am)
After 4 months and 5 Volvo dealers , I found a dealer that agreed with me that the voltage regulator and/or alternator were/was defective. The voltage to the CEM can never drop below 12.5 volts (per Volvo), but the fault in my electrical system allowed the voltage under load to drop momentarily to as low as 11.3 volts. Additionally, the battery was not being properly charged while driving, which led to its premature demise.
Whenever the voltage drops below the minimum bias level, the behavior of the computer system in totally unpredictable. Low voltages will reset the computers preventing any errors codes from being stored (a concept that many dealers refused to accept!). This phenomena accounted for my original breakdown, and even after the CEM and battery were replaced, the vehicle still behaved oddly. The alarm sounded without reason, the door locks would behave erratically etc. Finally, I found a dealer that understood my cars issues, and thanks to a new alternator/voltage regulator, my car is again driveable.
Please be aware that the S80, and I assume the XC70, have an automatic feature that cycles air through the cabin when the car is parked to keep temperatures to a minimal level.
#13 of 22 Re: Battery discharges:key off and removed overnight [johns5]
Aug 18, 2007 (5:50 am)
Reply to John, I was just reading your reply regarding the 2001 XC wagon, blowers turning on after ignition key is turned off. Just had my regulator replaced and it did not fix the problem. Have you found a fix for the problem. If so would love to know. Battery was dead, the reparis shop said it was the voltage regulator, but still doing the same thing. I also found that this only happens when I am using the airconditioner.
#14 of 22 light bulbs
Sep 06, 2008 (3:49 pm)
Have a 04 XC-70 with 75,000 miles. Really no major mech problems. However, we have a summer home situated on a gravel road . I am constantly replacing the light bulbs for the rear brake, signal, license,and tail light . Come on; this is considered a vehicle that can be driven off road. Also, I upgraded to Xenon headlights which are horrilbe. They only extend the beam in a narrow range and less than 25 feet in front, Volvo service said there is nothing that can be done.