Stock Alternator, what's it rated at?

[jdium]

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

[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.

[jdium]

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 :smile:

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]

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]

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

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

[onara]

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

[keesue]

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

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]

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]

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
http://www.kaitousa.com/using%20a%20multimeter_files/meter2.gif

[Indianspringsaz]

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

[bigsky2]

jdium

I think it's 80. *

* source, Yarisworld forums :)

[Razr]

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.