Hello, my battery died while driving, the car stopped. I checked the voltage, it is only 11.0 - 11.5 volts even with the engine running. Belt is OK, I guess it is either the alternator or the voltage regulator. Fuses seem to be OK. Is there anything I should check before I take it to the shop? I mean any hidden fuses, relays, switches, connections, anything??? Ho can I tell if it is the voltage regulator or the alternator itself?
Had the same problem with an s80 this week- no warning lights nothing. was the regulator. when you have it fixed cancel all the trouble codes as when voltage is low everything registrs low signal input and makes the car go into get me home mode.
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That would depend on if it has an electric fuel solenoid or mechanical. If you have to pull a lever or knob to get the engine to die when you want to shut it off, it wouldn't matter if the alternator is charging or not, the engine will keep running until it runs out of fuel. If the engine dies when you turn off the key, this would indicate an electric fuel cut off and should shut off when the battery cable is removed if the alternator is not charging. But I think the best way to check your alternator is with a multi meter or at least a volt meter. With the engine running you should have at least 12.5V to 13.5V at the battery at idle.
Your description sounds like a bad battery. Do you have a volt meter to watch the voltage as you turn the key to start? The voltage on a good battery( meaning fully charged) should stay about 11 volts while cranking, if it drops below that suspect a bad battery.
Another possibility is that the battery is good but the alternator is not charging.
Will it start with a jump? If is does check with a volt meter the out put of the alternator it should be 13.8 volts or slightly higher.
sounds as though you have a bad alternator or a loose alternator belt and the battery is not being charged. while the car is running - check the voltage from the alternator and make sure it is about 13.4 volts DC.
For 1998 Volvo V70 2.4L MFI DOHC
5cylthe Oxygen Sensor is located under vehicle, center, below front seating area,
mounted in top of exhaust pipe.
The oxygen sensor produces a voltage within 0 and 1 volt. When there is a
large amount of oxygen present (lean mixture), the sensor produces a
low voltage (less than 0.4v). When there is a lesser amount present
(rich mixture) it produces a higher voltage (0.6-1.0v).The
stoichiometric or correct fuel to air ratio will read between 0.4 and
0.6v. By monitoring the oxygen content and converting it to electrical
voltage, the sensor acts as a rich-lean switch. The voltage is
transmitted to the engine controller. The controller signals the power
module to trigger the fuel injector.
Hope this helped (remmeber comment and rated this).
More than likely you have to bring it to the dealer to have your control module reset. When the battery dies unexpected some of the control modules will go in to what they call "sleep" mode. Sometimes you can take the negative battery cable and put it on the positive for about 10 min. It might wake the system back up. This does not work all the time but its worth a try before you bring it to the dealer.
If the battery and alternator tested fine. I would have the charging system rechecked when engine is hot and at high rpm's. This way the checks are being done as if you were driving and driving for a long time. Alternators can work fine when cold but weaken when hot or stop working. This problem is not rare but only is seen occassionly. Unless it was checked at an electrical shop the average shop doesn't run these tests for they don't see the problem often enough to automaticly run them at all times. Good luck and let me know how you make out.