Stock Alternator, what's it rated at? - Toyota Yaris Forums

jdium · 07-01-2007, 01:19 AM

Did a quick search and didn't find anything. Are we talking over or under, say, 85 amps at full output?

Capagotks · 07-01-2007, 03:27 AM

if you cant find it, ask your toyota dealer or get a mate and a multimeter and you rev up the car while he measures the voltage and amps.

jdium · 07-01-2007, 04:11 AM

Quote:

Originally Posted by Capagotks

if you cant find it, ask your toyota dealer or get a mate and a multimeter and you rev up the car while he measures the voltage and amps.

Thanks, but I'd prefer to ask online

I don't have a multimeter, or I'd already know...I figured someone in here would know. I would think that someone would think about that before trying to push the 1kw amps that some have...only stupid people decide to just "see what happens, maybe I'll blow it up, maybe not..." I don't want to be one of them...

eTiMaGo · 07-01-2007, 05:43 AM

Quote:

Originally Posted by jdium

only stupid people decide to just "see what happens, maybe I'll blow it up, maybe not..." I don't want to be one of them...

Hey... that's how a LOT of cool stuff got invented!

jdium · 07-01-2007, 01:15 PM

Quote:

Originally Posted by eTiMaGo

Hey... that's how a LOT of cool stuff got invented!

Ya, but not on my just financed 2 week old car

onara · 07-10-2007, 07:31 PM

according to the Service Manual the generator produces 10A with 13.2 to 14.8 V @ 2000 RPM (no load), 30A with load

keesue · 07-10-2007, 07:40 PM

Quote:

Originally Posted by jdium

Ya, but not on my just financed 2 week old car

You said that right...plus you'd need a hefty multimeter to measure amps from an alternator. The handheld ones are rated to 10amps before the fuse blows (or you hand fries which ever comes first).

It has to be more than 10 amps to handle the load of the lights, fan, defroster, wipers and least of all the engine ignition, fuel injection and charging systems all at the same time. My guess from this load would be @ 55 amps which is typical for a car without power windows.

grampi · 07-11-2007, 08:49 AM

Quote:

Originally Posted by onara

according to the Service Manual the generator produces 10A with 13.2 to 14.8 V @ 2000 RPM (no load), 30A with load

That doesn't sound right. My old Tercel had a 45 amp alternator and I would think the one on the Yaris would be AT LEAST that much or more. There's no way a 30 amper would run headlights and other lights, heater fan, radio, a power outlet, etc. all at one time.

Black Yaris · 07-11-2007, 09:34 AM

Quote:

Originally Posted by keesue

You said that right...plus you'd need a hefty multimeter to measure amps from an alternator. The handheld ones are rated to 10amps before the fuse blows (or you hand fries which ever comes first).

It has to be more than 10 amps to handle the load of the lights, fan, defroster, wipers and least of all the engine ignition, fuel injection and charging systems all at the same time. My guess from this load would be @ 55 amps which is typical for a car without power windows.

a het mulimeter? a cheepy $10 one from radio shack can measure 100A, you just have to be bright enought to use the correct setting, there for why it is called a mutimeter

Indianspringsaz · 07-19-2007, 01:30 PM

All the multimeter will do is tell you how many amps you are drawing, not the rated capacity.

bigsky2 · 07-19-2007, 09:38 PM

jdium

I think it's 80. *

* source, Yarisworld forums :)

Razr · 07-19-2007, 10:34 PM

Well there's no specs that I can see on the alternator itself, but based on it's (small) size alone I wouldn't expect it to be rated at much more then 60-70A short-term, but who knows what it'll do at higher duty cycles..

The big question is how much reserve does it have? Especially considering the fact that Yarii have electric power steer, so more static load than most cars.

If your Yaris has a rear window defroster and electric windows it's a gimme that you'll have 20-30A you can borrow from those though.

07-01-2007, 01:19 AM	#1
jdium Mr Attitude Drives: Blazing Blue 5 Spd Join Date: Jun 2007 Location: Hillsboro Posts: 302	Stock Alternator, what's it rated at? Did a quick search and didn't find anything. Are we talking over or under, say, 85 amps at full output?

07-10-2007, 07:31 PM	#6
onara Drives: yaris HB Join Date: Jul 2007 Location: california Posts: 3	according to the Service Manual the generator produces 10A with 13.2 to 14.8 V @ 2000 RPM (no load), 30A with load Last edited by onara; 07-10-2007 at 08:04 PM.

07-19-2007, 09:38 PM	#11
bigsky2 Cousin Vitz View User's Garage Drives: Yaris RS 5DR / Vitz RS wannabe Join Date: Mar 2006 Location: Vancouver, Canada Posts: 1,082	jdium I think it's 80. * * source, Yarisworld forums :) __________________ 2007 Yaris RS Hatchback Black Sand Pearl 5DR MT DIY Speaker Spacer/Bracket Template for Yaris Hatchback http://www.yarisworld.com/forums/showthread.php?t=1930

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07-01-2007, 03:27 AM	#2
Capagotks Chode View User's Garage Drives: Silver 5 Door YRX 1.5L I4 Join Date: Feb 2007 Location: Sydney AUSTRALIA Posts: 51	if you cant find it, ask your toyota dealer or get a mate and a multimeter and you rev up the car while he measures the voltage and amps.

07-19-2007, 01:30 PM	#10
Indianspringsaz Drives: 07 Bitchin Blue HB Join Date: Jul 2007 Location: AZ Posts: 106	All the multimeter will do is tell you how many amps you are drawing, not the rated capacity.

07-19-2007, 10:34 PM	#12
Razr YRS WHOR View User's Garage Drives: White 2007 Yaris E-Limited 5dr Join Date: Feb 2007 Location: Chiangmai, Thailand Posts: 359	Well there's no specs that I can see on the alternator itself, but based on it's (small) size alone I wouldn't expect it to be rated at much more then 60-70A short-term, but who knows what it'll do at higher duty cycles.. The big question is how much reserve does it have? Especially considering the fact that Yarii have electric power steer, so more static load than most cars. If your Yaris has a rear window defroster and electric windows it's a gimme that you'll have 20-30A you can borrow from those though.