Question about 2006 Volvo S40 T5

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06 Volvo S40 T5 battery, alternator, ac

Replaced battery 2 months ago because electric system lights came on. Have driven very little since then but today same thing happened but could not start or steer or put into drive. Now they tell me it needs a new alternator. AC won't cool if outside temp is over 80. They are telling me this is all because of the batter not charging. Can that be so?

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Posted on Jan 02, 2017

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SOURCE: 1999 Volvo S80 will not hold a charge

Tricky ... Was the alternator replaced with a 2nd hand one or a new one?

A defective alternator can allow the battery to discharge within a few minutes (the diodes in the rear of the alternator can burn out and cause the problem. The diode pack can be replaced). When this happens recharging the battery only replaces the power in the battery - which drains straight back to earth via the alternator, flattening the battery again - often within a couple of minutes or less.

Does the battery lose its charge when the car is standing or just when the engine is fired up?
If the battery loses its charge overnight, try disconnecting the wiring from the rear of the alternator (also look at the electrical connector that fits into the back of the alternator - look for melting/burning marks which suggest something may be amiss inside the alternator).

Let the car stand overnight with the alternator wires disconnected. Will it start up ok and drive (with the alternator wires still disconnected) the next morning?

You could also try just disconnecting the alternator wires, firing up the car and then driving it -
If the car drives ok without dying out and gets further down the street than it usually does, then it probably is the alternator at fault. The car should drive until the battery drains and has insufficient power to trigger the ignition. You certainly would get further down the street with a charged battery and disconnected alternator than you currently do.

It does sound as though you've had an alternator fault to begin with. If it has been replaced with a 2nd hand unit that unit may also be faulty. Rather than replace parts in desperation, visit an auto electrician's - within a few minutes they will be able to test the battery/alternator output and also identify where the lost current is going. It will be cheaper in the long run to have an auto electrician look at the charging system. It only takes a few minutes.

Posted on Sep 17, 2008

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SOURCE: 2005 volvo s40 t5 how to reset oil light

turn the key on to position 1 preset miliage trip button anh hold for 2 second release and turn key to position 2 hold within 4 secods and hold til manitance info clears.

Posted on Apr 19, 2009

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SOURCE: 1993 Volvo 850 AC

A/c system is undercharged, this rapid cycling of th compressor is a sensor issue and the improper temps at different locations of the system is being detected. Simply adding refrigerant is a very poor practice. It's quick and just as temporary. A properly serviced system eliminates these constant problems and repairs and the needless expense that comes with them.Good Luck and keep in mind that a clutch that cycles like that will not last long.

Posted on Aug 24, 2009

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SOURCE: 2001 Volvo V70-T5 fuel guage malfunction

I had a similar issue and started to notice other electrical failures along with the gas gauge. My rear doors would not lock and my rear wiper stopped working. I started pulling fuses and relays to see if this would reset, no go. But then I hit the jackjpot. In the rear electrical panel, below all the fuses and relays is a 2" x 2" black plastic square with a big screw in it.

Remove the screw and pull evenly on the black square. This seems to be a major electrical hub for the car. I reconnected and all 3 of my issues disappeared...I read somewhere that a fix might be to disconnect the battery for a few minutes, which I guess re-sets some relays and circuits, but I guess this did the same thing. Good luck.

Posted on Sep 30, 2009

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SOURCE: 2003 Volvo S40 starting problems

Volvo 2000 S40. Fantom starting problem. Went to the starter and has no power to soliniod. Will start for weeks then nothing.
Is this a module

Posted on Oct 27, 2009

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Replacing negative battery cable on 2005 volvo s40 t5.

Follow the cable from the battery to where it bolts onto the engine and body, I think it's a two sectioned cable, See if you can see any other wires attached to it and check for shabby loose little bits of broken wires that fit into the actual connector at the cable ends.Electrical connections are normally joined to the positive cable on most cars.
If nothing ,Then go to an independent parts retailer and get a cheaper version matched up as they're all made from the same materials. Phew $400 is a bit crazy. greed is spreading rampagely on our planet, Especially within the motor industry.Good luck.

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What is draining my car battery?

sounds like perhaps it is time to purchase a newer car and let that one find a new home . our daughter had a problem like this and after much expense was told to unhook every thing electrical she could . ended up being the radio/stereo in the trunk.

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2005 volvo s40 t5 spins over great but wont start. hear some whinning noise and clicking uner the hood. any help?

Car not starting or turning over indicates towards multiple possibilities. It can be issue with battery or weak battery. But if battery checks out ok, then it can be starter issue or faulty alternator or problem with low fuel pressure or no spark at spark plugs due to dirty spark plugs or faulty ignition coil or injectors getting cracked or dirty and needs to be cleaned.

To confirm the problem, the basic troubleshooting is required.

Click this link below and follow the troubleshooting:------


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Just purchased used 2004.5 S40 T5. Both Low beams are out. Have a gut feeling its not the bulbs. Any experience with this failure mode?

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Feb 04, 2011 | 2005 Volvo S40

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I have a 2006 s40 2.4i that needs an alternator and battery. I was told that it will get an updated alternator that also would requier an updated ac suction line. Can I still get a factory alternator...

I need a new alternator as well (2006 S40, 2.4ti, 80K miles) and the lowest quote I'm getting is $875. The dealer wants $950, an independent mechanic I trust quoted $930. You would think they could replace the part without all the extra nonsense -- in most other cars, they probably could. Volvo has made it unnecesarily difficult with the way they've designed this car. This is the first and last Volvo I will ever purchase.

The mechanic who quoted $875 also said he has someone in town who could replace the non-working parts of my current alternator and get it working again for about $575. But I wouldn't have a car for 2 full days.

Jul 27, 2010 | 2006 Volvo S40

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Volvo s40 2006

I found this for you hope this helps, Go to

Sep 16, 2009 | 2005 Volvo S40

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04 volvo s40 t5 won't start

have battery charged fully. start car test the output voltage of your alternator. do this by probing the batt pot terminal on backside of your alt. if it is good it must be above 12.35v if not replace

hope2help shack

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2005 volvo s40 t5 how to reset oil light

turn the key on to position 1 preset miliage trip button anh hold for 2 second release and turn key to position 2 hold within 4 secods and hold til manitance info clears.

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Max AC not working, driver window intermittent, normal AC erratic

Sounds like your having problems with a couple of relays.When you say that battery leaked do you mean out the top of the battery as that sounds like the alternator is over charging the battery and maybe the root cause of your electrical problems.

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Volvo S40 T5 2006 power streering problem and something else S40 T5 2006, In the morning, specialy when it´s cold, and only when I accelerate more than 30 mph, I feel a little "hard to move" the power steering when i turn to the left only, just like 10° and after that the power steering finish the turn working well...It happens for about 10 or 15 minutes every time does the same when I turn from the center until 10° to the left..until the car have been warm. When the car is not moving, or moving slow or turning to the right at any speed, the power sterring feels just great. I just made a dialisis of the pwer steering sistem and put just volvo fluid and it didnt help. I dont know if there is a sensor for power steering stability at high speed or something like that, or maybe a CEM failure...and I blame the CEM because I have other issues like the transmission, sometimes kicks from 2nd to 3rd...specially when I have to stop on a if it was in neutral...and then when I accelerate, the RPM goes up and there it comes the kick. And when I use the manual it just work perfect. Other iusses are the window and the lock on the right back door sometimes doesn´t work and sometime for a long period works well. Once I stop using the car for a week, and when I try to open it, the door of the left (front and back) were stock, not even from the inside could open them, neither the windows or the mirrow on the left side...I have to use the Valet key to open the doors and the windows and the mirrow start to work. Thanx for your help.

Mar 13, 2012 | 2006 Volvo S40 T5

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