battery light on and off - Page 2 - Toyota Yaris Forums

CTScott · 03-21-2014, 10:32 AM

Quote:

Originally Posted by Bluevitz-rs

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.

Miryai · 03-23-2014, 02:50 AM

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.

Miryai · 03-30-2014, 02:28 AM

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.

CTScott · 03-30-2014, 06:55 AM

Quote:

Originally Posted by Miryai

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.

Bluevitz-rs · 03-30-2014, 07:15 AM

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.

Sent from my iPod Touch

nortonfb · 04-29-2014, 09:29 PM

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

CTScott · 04-29-2014, 09:35 PM

Quote:

Originally Posted by nortonfb

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.

nortonfb · 05-01-2014, 09:40 AM

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

CTScott · 05-01-2014, 10:35 AM

Quote:

Originally Posted by nortonfb

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?

nortonfb · 05-01-2014, 06:52 PM

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

CTScott · 05-01-2014, 09:05 PM

Quote:

Originally Posted by nortonfb

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.

nortonfb · 05-02-2014, 10:58 AM

The numbers are:
17060-21150
10 42 10 - 8180
12v / (1?) 6 6
MN
Toyota Denso
Thanks
Steve

CTScott · 05-02-2014, 11:20 AM

Quote:

Originally Posted by nortonfb

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.

nortonfb · 05-02-2014, 06:23 PM

If there is a TB on it, does Toyota share any cost or they
are just aware a problem exits?
Thanks much,
Steve

CTScott · 05-02-2014, 10:05 PM

Quote:

Originally Posted by nortonfb

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.

Bluevitz-rs · 05-02-2014, 10:33 PM

Is there really anything that can be cleaned or is it the IC itself that corrodes?

CTScott · 05-02-2014, 10:39 PM

Quote:

Originally Posted by Bluevitz-rs

Is there really anything that can be cleaned or is it the IC itself that corrodes?

It's a potted module. There are a couple of holes in the "bad" version and if it is bad you actually see rust at the holes. If you catch it before that you can simply seal the holes with a dab of RTV, but once corroded it is done, since you can't pull the module apart without damaging it.

nortonfb · 05-03-2014, 07:35 AM

Is there specs on belt tension? I mat at some pointe change it out.
Looks like a bear. I cannot see the bottom bolts, no room.
Also there is one plastic connector I cannot figure out how to remove it.
I read here some where that Bosch is not as good a Denso, I can get Bosch but not
Denso, locally.
Any truth about Bosch?
Thanks
Steve,

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03-23-2014, 02:50 AM	#20
Miryai Drives: 2008 Toyota Yaris HB Join Date: Mar 2014 Location: Oklahoma Posts: 4	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.

03-30-2014, 02:28 AM	#21
Miryai Drives: 2008 Toyota Yaris HB Join Date: Mar 2014 Location: Oklahoma Posts: 4	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.

03-30-2014, 07:15 AM	#23
Bluevitz-rs 1NZ-6spd View User's Garage Drives: '05 6-Spd Vitz RS Join Date: Oct 2008 Location: Oshawa, Ontario, Canada Posts: 2,967	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. Sent from my iPod Touch

04-29-2014, 09:29 PM	#24
nortonfb Drives: 2007 Join Date: Feb 2014 Location: motown Posts: 339	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

05-01-2014, 09:40 AM	#26
nortonfb Drives: 2007 Join Date: Feb 2014 Location: motown Posts: 339	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

05-01-2014, 06:52 PM	#28
nortonfb Drives: 2007 Join Date: Feb 2014 Location: motown Posts: 339	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

05-02-2014, 10:58 AM	#30
nortonfb Drives: 2007 Join Date: Feb 2014 Location: motown Posts: 339	The numbers are: 17060-21150 10 42 10 - 8180 12v / (1?) 6 6 MN Toyota Denso Thanks Steve

05-02-2014, 06:23 PM	#32
nortonfb Drives: 2007 Join Date: Feb 2014 Location: motown Posts: 339	If there is a TB on it, does Toyota share any cost or they are just aware a problem exits? Thanks much, Steve

05-02-2014, 10:33 PM	#34
Bluevitz-rs 1NZ-6spd View User's Garage Drives: '05 6-Spd Vitz RS Join Date: Oct 2008 Location: Oshawa, Ontario, Canada Posts: 2,967	Is there really anything that can be cleaned or is it the IC itself that corrodes?

05-03-2014, 07:35 AM	#36
nortonfb Drives: 2007 Join Date: Feb 2014 Location: motown Posts: 339	Is there specs on belt tension? I mat at some pointe change it out. Looks like a bear. I cannot see the bottom bolts, no room. Also there is one plastic connector I cannot figure out how to remove it. I read here some where that Bosch is not as good a Denso, I can get Bosch but not Denso, locally. Any truth about Bosch? Thanks Steve,