Question about 2006 Volvo S40 T5
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
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
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
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
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
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
Tips for a great answer:
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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:------
This will help.
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