Celica Flasher relay

Having pulled this out due to 'disco flash' syndrome with all bulbs
fine, on both indicator directions including hazards, I found it to be
microprocessor controlled. Toyota want a monsterous amount for it,
anyone got a diagram of it as I'll just make a new one?.

On 12 Apr 2006 03:50:07 -0700, "Coyoteboy" <coyoteboyuk@hotmail.com>
wrote:
[color=blue]
>Having pulled this out due to 'disco flash' syndrome with all bulbs
>fine, on both indicator directions including hazards, I found it to be
>microprocessor controlled. Toyota want a monsterous amount for it,
>anyone got a diagram of it as I'll just make a new one?.[/color]

I'd have to check the wiring diagram for any unusual things, but
I'll bet you can drop in a standard USA'n Heavy Duty flasher.
Especially if it's a 2-wire system with Power In, Flash Out, and
possibly a Ground reference lead for the timing electronics that a
standard flasher will not need.

If you see more than three wires, stop.

DO NOT cut the plug off the wiring harness, make adapter wires from
male-tab and female-tab crimp connectors. You may want to put it back
the way you found it.

--<< Bruce >>--

--
Bruce L. Bergman, Woodland Hills (Los Angeles) CA - Desktop
Electrician for Westend Electric - CA726700
5737 Kanan Rd. #359, Agoura CA 91301 (818) 889-9545
Spamtrapped address: Remove the python and the invalid, and use a net.

"Coyoteboy" <coyoteboyuk@hotmail.com> wrote in message
news:1144839007.377649.38130@u72g2000cwu.googlegroups.com...[color=blue]
> Having pulled this out due to 'disco flash' syndrome with all bulbs
> fine, on both indicator directions including hazards, I found it to be
> microprocessor controlled. Toyota want a monsterous amount for it,
> anyone got a diagram of it as I'll just make a new one?.
>[/color]

Hey, CB, what year Celica is this?

Sometime in the 90's, Toyota went to "Relay Integration" which is an array
of mini and micro electronics that took the place of a lot of the realys in
their vehicles.

Last I checked, the module was $175 for a '99 Toyota Pre-Runner that had a
couple of electrical problems related to this little piece of VooDoo...one
being the 'disco flashers'. And that was with a discount.

If you want to make a bypass of some sort, you will have to trace down
(obviously) the inputs and the outputs of the circuit.
Good luck!

Hachiroku wrote:[color=blue]
> Hey, CB, what year Celica is this?[/color]

Tis a '91 GT-Four ("Alltrac" to you guys)

Yota wanted about 125$ equivelent for this, i can get one second hand
for about 50 but I'd rather know it wasnt gonna fail in a week if you
know what i mean. I pulled it out a while ago when it first started
going flash...flash...fl........flash....flash... and it still passed
the MOT but now it goes fla...fla...fla............fla...fla...fla and
wont LOL. I just remember it being a fairly large transparent relay
casing with a mini extra pcb inside and a tiny 8pin microprocessor
linked in. If I can trace the inputs and outputs I'll just reprogram
another similar microprocessor and replace it, if not i may take the
crowbar alternative of wiring in a normal flasher.

Ta
J

"Coyoteboy" <coyoteboyuk@hotmail.com> wrote in message
news:1144860089.260152.321210@i40g2000cwc.googlegroups.com...[color=blue]
>
> Hachiroku wrote:[color=green]
>> Hey, CB, what year Celica is this?[/color]
>
> Tis a '91 GT-Four ("Alltrac" to you guys)
>
> Yota wanted about 125$ equivelent for this, i can get one second hand
> for about 50 but I'd rather know it wasnt gonna fail in a week if you
> know what i mean. I pulled it out a while ago when it first started
> going flash...flash...fl........flash....flash... and it still passed
> the MOT but now it goes fla...fla...fla............fla...fla...fla and
> wont LOL. I just remember it being a fairly large transparent relay
> casing with a mini extra pcb inside and a tiny 8pin microprocessor
> linked in. If I can trace the inputs and outputs I'll just reprogram
> another similar microprocessor and replace it, if not i may take the
> crowbar alternative of wiring in a normal flasher.
>
> Ta
> J
>[/color]

Holy Crap! You can do that?!?!?!

What do you do in Life as we know it?

I was an Elec Tech for 19 years and I'd have a tough time setting up a
MicroP for this task!

Damn! He's GOOD!

> Holy Crap! You can do that?!?!?![color=blue]
>
> What do you do in Life as we know it?
>
> I was an Elec Tech for 19 years and I'd have a tough time setting up a
> MicroP for this task!
>
> Damn! He's GOOD![/color]

lol, not really but thanks! originally got a masters in Integrated
Engineering (all core work from mechanical, electronics and materials
engineering) but currently doing a PhD in visual servoing of robots, teach
a bit of basic microprocessor stuff on the side for cash and use it for the
odd mini home project.

Sod all experience with analogue circuit design though so i have to ask for
help on all but the basics of that LOL...i.e. I'm currently writing code to
visually control a radio controlled car, but I need to ask the tech what
resistors and capacitors to use to interface with the outside world!
Transistors - well unless its a mosfet being crowbarred on or off with PWM I
know nothing! They always chuckle at me when i arrive with a confused
expression on my face and a burned out component in hand :)

Incidentally, you might (or might not, depending on if you're at my level of
geekness) find the megasquirt DIY EFI world interesting ([url]www.msefi.com[/url]) - im
currently trying to get my celica running on one of those - its kinda fun
but you have to create a hefty daughterboard to condition the timing and
knock signals - thank god they have existing diagrams!

J

Hachiroku wrote:[color=blue]
> "Coyoteboy" <coyoteboyuk@hotmail.com> wrote in message
> news:1144860089.260152.321210@i40g2000cwc.googlegroups.com...[color=green]
>>
>> Hachiroku wrote:[color=darkred]
>>> Hey, CB, what year Celica is this?[/color]
>>
>> Tis a '91 GT-Four ("Alltrac" to you guys)
>>
>> Yota wanted about 125$ equivelent for this, i can get one second hand
>> for about 50 but I'd rather know it wasnt gonna fail in a week if you
>> know what i mean. I pulled it out a while ago when it first started
>> going flash...flash...fl........flash....flash... and it still passed
>> the MOT but now it goes fla...fla...fla............fla...fla...fla
>> and wont LOL. I just remember it being a fairly large transparent
>> relay casing with a mini extra pcb inside and a tiny 8pin
>> microprocessor linked in. If I can trace the inputs and outputs I'll
>> just reprogram another similar microprocessor and replace it, if not
>> i may take the crowbar alternative of wiring in a normal flasher.
>>
>> Ta
>> J
>>[/color]
>
> Holy Crap! You can do that?!?!?!
>
> What do you do in Life as we know it?
>
> I was an Elec Tech for 19 years and I'd have a tough time setting up a
> MicroP for this task!
>
> Damn! He's GOOD![/color]

This IS just plain GOOD!

Don't forget to check this out:

[url]http://www.bgsoflex.com/megasquirt.html[/url]

WOW!

On Wed, 12 Apr 2006 20:20:23 +0100, "Coyoteboy"
<coyoteboyuk@hotmail.com> wrote:
[color=blue][color=green]
>> Holy Crap! You can do that?!?!?!
>>
>> What do you do in Life as we know it?
>>
>> I was an Elec Tech for 19 years and I'd have a tough time setting up a
>> MicroP for this task!
>>
>> Damn! He's GOOD![/color]
>
>lol, not really but thanks! originally got a masters in Integrated
>Engineering (all core work from mechanical, electronics and materials
>engineering) but currently doing a PhD in visual servoing of robots, teach
>a bit of basic microprocessor stuff on the side for cash and use it for the
>odd mini home project.
>
>Sod all experience with analogue circuit design though so i have to ask for
>help on all but the basics of that LOL...i.e. I'm currently writing code to
>visually control a radio controlled car, but I need to ask the tech what
>resistors and capacitors to use to interface with the outside world!
>Transistors - well unless its a mosfet being crowbarred on or off with PWM I
>know nothing! They always chuckle at me when i arrive with a confused
>expression on my face and a burned out component in hand :)[/color]

That's why Engineers design blue-sky stuff, and Technicians actually
make it work.

I still say trace out the box and see if there's anything in there
besides just a timing circuit and possibly the current sense circuit
that triggers the stutter-flash when the lamp load drops too low. If
it only has two or three wires coming and going, it almost has to be
'just a fancy flasher'.

Hell, crack the box open - you might find a trim-pot inside the Toy
flasher for the current sensing circuit that just needs a little tweak
to get it all running back to normal. (Make a hash mark at the
starting point, so you can put the setting back there if that isn't
it.) Remember that component values drift as they age.

The Grote 'GroTronic' truck flasher has a small circuit board inside
with a timing chip that kicks the output relay, so the flasher holds
the same steady rate whether it's driving one or sixteen lamps. And
it costs a whole lot less.
--
Bruce L. Bergman, Woodland Hills (Los Angeles) CA - Desktop
Electrician for Westend Electric - CA726700
5737 Kanan Rd. #359, Agoura CA 91301 (818) 889-9545
Spamtrapped address: Remove the python and the invalid, and use a net.

Bruce L. Bergman wrote:[color=blue]
> On Wed, 12 Apr 2006 20:20:23 +0100, "Coyoteboy"
> <coyoteboyuk@hotmail.com> wrote:[color=green]
>> That's why Engineers design blue-sky stuff, and Technicians actually[/color]
> make it work.[/color]

I'm working on being able to do both (I can in mechanical stuff) - only
takes time and I've only being doing the electonics side of things for
a couple of years (other than spare time robotic projects).

Unfortunately almost everything you learn these days is based on
programming and very little hardware and those who can do the hardware
side tend to be rather smug and conceited and unwilling to help us mere
mortals learn lol. Id say a Im at a point where i know what should
work, and the theories behind them and roughly what to look out for but
just havent spent the last 20 years doing it so miss the experience and
"off the cuff" knowledge of components. Gimme a datasheet, a coffee and
a bit of time and I'll figure it out, i just dont have time generally
:)
[color=blue]
> I still say trace out the box and see if there's anything in there
> besides just a timing circuit and possibly the current sense circuit
> that triggers the stutter-flash when the lamp load drops too low. If
> it only has two or three wires coming and going, it almost has to be
> 'just a fancy flasher'.[/color]

OK you convinced me, I'll crack it open and trace it out - i like a
challenge :) Might teach me more too!

FanJet wrote:[color=blue]
> Hachiroku wrote:[color=green]
> > "Coyoteboy" <coyoteboyuk@hotmail.com> wrote in message[/color]
> Don't forget to check this out:
>
> [url]http://www.bgsoflex.com/megasquirt.html[/url]
>
> WOW![/color]

Groovy isnt it, i was hooked when i got my kit (you can buy them
assembled). So far I have:
Fuelling, dual 12x12 tables and dual boost tables for 'valet parking
mode' (mapped to 20psi)
Knock sensing
Wideband AFR sensing
Boost control including intake temp sensitive boost levels and timing
adjustment
Full spark advance control
Fan control
Variable induction control

I didnt bother with the launch control and fancy stuff like shift
lights, i just want it functional - and it will be fully fitted within
the stock ECU case and use almost all the stock ECU harness :)

J