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Old 03-20-2014, 11:54 PM   #19
Miryai
 
Drives: 2008 Toyota Yaris HB
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My previous alternator was overcharging by a good bit. From what the mechanics said I was outputting like a good 19volts idling, even more with the accelerator pushed down.

Sadly, these are aftermarkets, since the dealership wants a good $2,000+ to replace the alternator, especially since the one I have is still under a lifetime warranty, but I will definitely get one of those meters, and see what happens when the battery light is on, and what not. I've not checked the straps, as I didn't think of that possibility.

Thanks for the ideas and input! I'll keep you guys posted.

Last edited by Miryai; 03-21-2014 at 12:32 AM.
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Old 03-21-2014, 09:47 AM   #20
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my '07 with 300,000+ km still had the factory alternator on it and after a night at the drive in it started to flicker the battery light. took it to the mechanics and they replaced the battery and said it was fixed (even tho i said to them it was the alternator) and so of course i went back a week later with the same problem and a destroyed brand new battery. so got the alternator replaced and another new battery (for free).

still no idea what caused it, but it has worked fine for several months now
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Old 03-21-2014, 10:09 AM   #21
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I'm thinking, if there's corrosion or a loose connector on the feedback wire to the alternator regulator, it might be reading the voltage as being too low and making the alternator put out maximum output.

I'd have to look at how the regulator works again in my EWD.
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Old 03-21-2014, 10:32 AM   #22
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Quote:
Originally Posted by Bluevitz-rs View Post
I'm thinking, if there's corrosion or a loose connector on the feedback wire to the alternator regulator, it might be reading the voltage as being too low and making the alternator put out maximum output.

I'd have to look at how the regulator works again in my EWD.
The white wire on the alternator connector is the feedback wire to the voltage regulator. There should be battery voltage on that pin with the engine not running.
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Old 03-23-2014, 02:50 AM   #23
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I purchased a volt meter. It was $5 including shipping and handling, and you never know, it might be useful for one of my house mate's cars later. But once I have it, I'm gonna plug it in and run, see if I can manage to look at it when the issue is happening. But all I know, is that it's starting to occur a lot more frequently. It's happening more and staying on longer, than when it looks like everything is fine.
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Old 03-30-2014, 02:28 AM   #24
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Since, I hate when no one updates their problem. Voltmeter came in today. My car idles at the high 13's to low 14's. That doesn't seem to be too bad, but when the battery light comes on, it skyrockets to at least 17. I think the highest I saw was 18.3, but according to my mechanics the alternator is fine (I doubt it.). Taking it to the mechanic on Monday and telling them, and seeing if they fix it....if not, I guess I declare my car a lemon since I've replaced this damn thing four separate times already.
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Old 03-30-2014, 06:55 AM   #25
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Quote:
Originally Posted by Miryai View Post
Since, I hate when no one updates their problem. Voltmeter came in today. My car idles at the high 13's to low 14's. That doesn't seem to be too bad, but when the battery light comes on, it skyrockets to at least 17. I think the highest I saw was 18.3, but according to my mechanics the alternator is fine (I doubt it.). Taking it to the mechanic on Monday and telling them, and seeing if they fix it....if not, I guess I declare my car a lemon since I've replaced this damn thing four separate times already.
Now that you have the meter, with the engine off, check the voltage on the white pin of the alternator connector.
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Old 03-30-2014, 07:15 AM   #26
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For what it's worth, wiggle that connector first too and see if that fixes the problem. Also after you unplug it, have a look inside for any green corrosion. There's also a chance the pin isn't tight enough.


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Old 04-29-2014, 09:29 PM   #27
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Another return of an old thread.
My 07 hb has the battery light on.
My output is 13.5-13.8 with the fan, brights, emergency flashers, radio
and defroster. The battery is 12.8V.
The battery indicator does flicker every 5-7 seconds.
Battery is new as of 1/14.
I cleaned the ground & ground on the inner fender.
Also cleaned the positive connection.
The humidity here is high and is raining & will be until Sunday.
The car was purchased 2/14 and I have no history.
The dealer did do an inspection in February.
Ideas/thoughts?
Steve
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Old 04-29-2014, 09:35 PM   #28
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Originally Posted by nortonfb View Post
Another return of an old thread.
My 07 hb has the battery light on.
My output is 13.5-13.8 with the fan, brights, emergency flashers, radio
and defroster. The battery is 12.8V.
The battery indicator does flicker every 5-7 seconds.
Battery is new as of 1/14.
I cleaned the ground & ground on the inner fender.
Also cleaned the positive connection.
The humidity here is high and is raining & will be until Sunday.
The car was purchased 2/14 and I have no history.
The dealer did do an inspection in February.
Ideas/thoughts?
Steve
Sounds like the battery and alternator OK. Since the light is on constant, check the connector with the small wires, on the alternator to make sure it is plugged in.
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Old 05-01-2014, 09:40 AM   #29
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I removed all the connectors and cleaned.
Where I work they have a tester
The results are:
Battery V 12.72, 618cca, rating 575cca
Starter test 11.25v
Charging test v 13.94
I still have a glowing bright red battery light, I feel so cheap..
I'm hoping that this maybe humidity related & once we dry out it will go away.
Steve
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Old 05-01-2014, 10:35 AM   #30
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Quote:
Originally Posted by nortonfb View Post
I removed all the connectors and cleaned.
Where I work they have a tester
The results are:
Battery V 12.72, 618cca, rating 575cca
Starter test 11.25v
Charging test v 13.94
I still have a glowing bright red battery light, I feel so cheap..
I'm hoping that this maybe humidity related & once we dry out it will go away.
Steve
Your getting good readings. Is your alternator the original one or a replacement?
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Old 05-01-2014, 06:52 PM   #31
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The alternator is marked Toyota Denso. I don't know if it's
original. I bought the car last February after I totaled my 08'.
Steve
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Old 05-01-2014, 09:05 PM   #32
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Quote:
Originally Posted by nortonfb View Post
The alternator is marked Toyota Denso. I don't know if it's
original. I bought the car last February after I totaled my 08'.
Steve
What's the part number on it?

There is a TSB on 07-08 alternators where the internals of the voltage regulator, within the alternator, corrode.
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Old 05-02-2014, 10:58 AM   #33
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The numbers are:
17060-21150
10 42 10 - 8180
12v / (1?) 6 6
MN
Toyota Denso
Thanks
Steve
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Old 05-02-2014, 11:20 AM   #34
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Quote:
Originally Posted by nortonfb View Post
The numbers are:
17060-21150
10 42 10 - 8180
12v / (1?) 6 6
MN
Toyota Denso
Thanks
Steve
That first number should be a 2, instead of a 1 (27060-21150), but the 21150 versus 21151 is the one which potentially has the non-sealed voltage regulator, which is prone to corrosion.
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Old 05-02-2014, 06:23 PM   #35
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If there is a TB on it, does Toyota share any cost or they
are just aware a problem exits?
Thanks much,
Steve
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Old 05-02-2014, 10:05 PM   #36
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If there is a TB on it, does Toyota share any cost or they
are just aware a problem exits?
Thanks much,
Steve
With a TB they are not required to do anything, particularly if you are out of warranty. The TBs are really just references for techs on common issues.
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