help / mx83 / 2jz / cruise control *now fixed*

[PlacentaJuan]

hey i have this mx83 cressida with a 2jz in it, and the cruise control doesnt work anymore.

i know southo has his fixed but the asshole that fixed it is only interested in financial reward to part with the solution (hardly the toymods way is it?)

anyway i took it to toyota today and pade them muny!! (dont neg rep me) to get it fixed, Unfortunately i was short on time and they wanted the car for a few hours to fix it, but in the time they had the 'toyota technician' reckons that the TRANSMISSION COMPUTER isnt talking to the ENGINE COMPUTER!! even tohugh i thought they were one and the same box.

also with the 2jz auto conversion one of the speed sensors is missing and you get that o/d light flashing, but a 1jz>mx83 conversion seems to have this same fault and cruise control works fine.

also my tacho isnt hooked up but im sure cruise control doesnt need a tacho signal.

any ideas what i need to do to get cruise control working? it turns on ok (dash light) but wont allow me to set the speed...

[Officer Doofy]

LOL jessie what the hell did you think a " toyota technician" would do
I would neg you but im scared of the consequence's

Pm ghostrider, he too had his fixed at the same time as southo i think
He has a 1uz in a mx83 but i think it was a similar fix

[ProjectSleeper]

Both Ghostrider and I had ours done at the same time (yes, mine is 2J, his is 1UZ)

I wish I could tell you exactly what was done. but I honestly have no idea.. he was under the dash for a few minutes only, and it was done..

Afterwards, I pointed Mos in the general area that he was woirking on and Mos said "ahhh I think I know what it was" - but he never had a look..

[PlacentaJuan]

im going to visit cambelt on wednesday, he has his mx83 running and has a few ideas how to fix it, will keep this htread posted!!

[Norbie]

I'll be watching with interest, I assume the MX83 has a vacuum-operated cruise module like my MA61?

[takai]

From that diagram it indicates that it requires a SPD sensor from the ECU. And also the SP2 sensor from the gearbox (G-W SP2 in 2nd diagram)

Now, im guessing that the SP2 sensor isnt hooked up, and hence its not working.

[PlacentaJuan]

^ yes thats what i reckon too, but i thought it was SP1 that i was missing Mos's wiring kept everything else working. but i could be wrong it might be sp2 i am missing.

btw where is the cruise control ecu located?

[Ribfeast]

My cruise works, car uses the 7M cruise control module though. Only have 1 speed sensor hooked up (dash I think). Unfortunately I can't tell you how, as the car came with the 1JZ already fitted and cruise working. Scrote (prev owner), Mos, or Sideshow might be able to help you out.

[PlacentaJuan]

Thanks to Dave (cambelt) my cruise control is now working!!!

it is awesome and i bestow the blessings of rep to cambelt!

if anyone wants to know the fix pls pm me for now and then give dave some of your rep.

[takai]

Cool, that sounds good. Good to hear its working again.

[Ribfeast]

Good to hear mate Why PM the fix? Just post it up on here so future people can search for it

[mrshin]

Interesting, I've noticed several mentions of people having issues with their MX83 cruise control, but I never had any problem with mine. I'm running a 1UZ, auto, and Motec.

[takai]

Aye, you are probably just feeding it the correct signals.

[Gavatron]

Are the SP1 and SP2 signals the same signal? As in, at say, 60km/h, is the voltage/pulse the same on SP1 and SP2?

If it was the same, couldn't you just feed the signal you have (SP1?) into both inputs on the Cruise ECU?

[takai]

Heh, its not SP1. Much simpler than that.

Infact im not sure why PJ isnt posting it, but ill let him decide on that front.