Electric windows

[custardavenger]

Hi guys. I know there are a few posts about the electric window problem and I have to say now it's summer I'm getting fed up with mine.

In the various posts they mention about other Toyotas having auto up and down. If so can anyone tell me which ones? I'm after one that uses the same style switch as the 2.

Having taken apart the auto switch from the 2 and trying to make it function auto up ( it has the contact but not the sprung ledge) its not really working.

Have got a mate making a circuit for me to power the windows but wanted them to work like the original rather than the way aftermarket units work.

[SteveJ]

The switch for the drivers window goes via the body ECU to do the auto-down. The passenger switch connects directly to the window motor.

HTH

[custardavenger]

Yeah got that. Am designing a circuit to remove window functions from the body ECU.

Just want to find out if there are other toyotas I can pinch switches from that have the auto up function.

[spit]

Dunno if it helps but, unlike the UK model, the J-Spec MR-S does have an auto-up function on the driver's side. Ditto for the majority of other Japanese imports that I've come across.

[custardavenger]

Dunno if it helps but, unlike the UK model, the J-Spec MR-S does have an auto-up function on the driver's side. Ditto for the majority of other Japanese imports that I've come across.

Yeah thought I had read something about that. Question now is. Can I get a J spec switch from Mr T? And if so whats the part No. ?

[spit]

It may well be the same switch (i can check part numbers for you when I've got my home PC running properly again). It doesn't latch at the switch, so I guess the trickery is in the ECU?

My Autozam Az-3 (Mazda import) on the other hand has a relay and microswitch thing going on to hold the switch in place until the window is up.

[custardavenger]

Easy way to tell Spit is. On the UK spec when you push the switch down it works in manual untill it hits a ledge then if you push it further than the ledge it goes into auto. When you operate the switch upwards it does not have the ledge. If yours does then I recon its gonna be a different part number.

I have played with the switch on my car and took it apart. The contacts are there for auto up but there is part of the moulding restricting the movement of the switch. Tried triming it with a knife but it needs more than that.

[SteveJ]

The latching switches have a bi-metalic strip in them that self heats when the motor stalls (at top or bottom of travel) causing the switch to release.

As Ste says, the trickery on the '2 (and indeed almost all modern cars) is done in electronics which do much the same thing - they look for a current spike when the motor stalls (either because the window is fully open / closed or some tit has got their head in the window   s:shock: :shock: s:shock:  ) They also watch for the switch being pressed a second time to cancel the request. You can also go one further and have a 2 stage switch for manual and then auto, but IIRC the J-spec '2 only has a single stage up (auto only - you have to click down briefly to stop it)

Never really given it much thought but it shouldnt be that difficult to implement, but I struggle to see what the difficulty is in holding the switch manually for all of 5 seconds   s:roll: :roll: s:roll:   It could be worse - you could be driving an Elise with 'leccy windows - you have to lean across the car to open the passenger window  s:( s:(

[custardavenger]

Not much difference I admit but I like to think I am modifying my 2 to the spec Toyota should have made it in the first place. Have already designed the circuit to work on the 5 sec (well a bit less) principal but if the switches I want are out there then I prefer that type of operation.

[Tem]

Corolla T-Sport has auto up&down switches for all 4 windows on all 4 doors. They are plug&play for us, mechanically that is. Might find them from a breaker, unless you want to pay list prices..  s;) s;)

(probably other Toyotas too, but 100% sure about those)


Celica T-Sport switches won't fit.

[custardavenger]

Great will have a look when I'm next at the scrappy. Is it a particular year?

[pada1462]

My old 02 Avensis had auto up and down on the drivers door window if it helps. What a difference driving the '2!

[Tem]

Great will have a look when I'm next at the scrappy. Is it a particular year?

I'm not sure, but the Celica (which doesn't fit) was '03 and the Rolla (which did fit) was '04.

[Chris]

i might be missing something here, but i thought the full up/down logic was controlled by the ecu, thats why its not as simple as just changing the switches?  actually thinking about it, wasn't there an old thread on sc that concluded that the easist way was to get a 3rd party kit?

[SteveJ]

i might be missing something here, but i thought the full up/down logic was controlled by the ecu, thats why its not as simple as just changing the switches?  actually thinking about it, wasn't there an old thread on sc that concluded that the easist way was to get a 3rd party kit?

And if you had read the posts above Chris......  s;) s;)   s:P s:P

[custardavenger]

Great will have a look when I'm next at the scrappy. Is it a particular year?

I'm not sure, but the Celica (which doesn't fit) was '03 and the Rolla (which did fit) was '04.

Cheers Tem. Will start hunting and let you know what I find.

[custardavenger]

Ok just update an old post I bought a corolla window switch and it doesn't fit. It's smaller than the MR2 one so could be made to fit.

Ok so anyone know the part No. of the J-spec window switch?

[cclarke99]

Looking at the circuits, the input to the ECU is just labelled AUTO, so it may work for both up and down. So all you might have to do is link the extra connnection on the switch (the one that goes to the auto up position) to the exisitng auto down connection. You could test this by linking the auto down connection to the exisitng up connection to see if it then worked in auto mode with the switch up. I've got a marked up diagram if it's of use but I don't seem to be able to attach it to this post

[custardavenger]

Haven't looked at the diagram for a while but I believe after taking apart both switches that the passenger circuit is switching the actual power that opperates the window while the drivers side is switching a control circuit.

Either way the other reason I'm building my own circuit (not sure if I've mentioned it already) is that I want to use the window switch on the dash to do a special function.

Pressed when both windows are up. windows drop 1"
Pressed with windows in any other position. Windows auto close.

I know it's probably not worth the effort but thats how I think it should work and as I will have learnt a new skill in making it (PIC programing) then I think its worth it.

[cclarke99]

You're right about the passengers side, all the ECU does here is mointor the current , as one of the posts above says. Good luck with your PIC project, I've not used one myself, but looking at the specifications, they're a really nice electronic component, ideal for what you're trying to do

[custardavenger]

Yeah they're great. I can program PLCs but was gonna get my mate who works in electonics to do it but as he was taking ages to come back with anything I had a look myself. Got the programer winging it's way from China. Just need the window switches now.

Have got the part numbers for the J-Spec ones just need to find out if they are what I want and were is the cheapest place to get a pair?