speed sensor problem

[killersupra]

mate i know that this is a litlle late but if you want to still know what the excact problem is let me know iam a auto sparky from oz

[adambenjamincampbell]

i would love to know the problem. i have a diagnosed speed sensor fault that only occurs under load. today i had a new speed sensor installed and my gear oil changed as the mechanic/sparky said he was 95% sure that would fix the problem...has cost me now $500 all up. The lights are still coming on!!!!!!!!!!!! i have a 95 manual na soop. the lights are the only problem, no reving or spedo issues, just the recurrent engine warning lights that goes away when the car is restarted..

i have had enough of this problem. the dealer said to just have the lights diconected and the warranty insurance will not cover the repair.

[killersupra]

be very carfull people that when mechanics not auto sparkys like myself work on your japanese alien space ship that you dont always listen to them when they say iam shure that its the fault when they really have no clue unless tested with the proper gear ,the main problem with the supra is it shits the second speed sender /sensor which is the odometer which yes sends another speed signal to all the other lovely ecus as it cleans the signal up from the source sig which is from the first sensor on the gearbox and if your odo is still counting it can still be stuffed and people who install speed cut defenders and butcher the wires are in for a treat aswell.its the pink wire from the odo that the signal is traveled apon and it will even cause your supra to run like shit at idle and you will never find the damn fault,if any more info needed just pm me but iam in oz so cant look at vehicals,

[robinwoodward]

Yers I'm having the exact same problem, does anybody have a fix ?

[Slipstream]

Hello fellow Supra Lovers,

The Answer is Replace the Odometer Module!! Please read on.

A couple of years ago I had this same dreaded problem with my pride and joy (93 2JZGTE 6Speed).
Symptoms were the same; Cruizing along all ok and suddenly the car felt like it was surging Master Caution Light (The Big Red Exclamation Mark) comes on and the check engine light comes on. Pulling up the car idle drops below it's ideal 600RPM to 300 and running lumpy and then stopping. Re-starting it still lumpy and then it suddenyl all goes away and seems fine.
I took my car to 3 maybe 4 supposed experts (Big Name Tuning Houses) as well as an electrician, no offence to the sparky who replied previously and they came up with 0!
After many nights studying the electrical system and talking to other Supra owners around the world it came down to Three things.
1. Change the speed sensor, 2. Change the ECU or 3. Replace the Odometer Module. Which is the Odometer and Trip meter panel.
Behind all of that lies an interrogator which receives inputs from the Transmission Speed Sensor and Interrogates it and then Translates/Refines this signal to the ECU so the Computer knows what to do! If you read the reccomendations in the Supra Manual for the error code which I think was Code42 it suggests everything except for replacing the Odometer Module and yet the module is the cheapest thing to replace at about 100 buck or less to fix this mysterious problem.
Hope this helps guys..........

[2jzmaestro]

the odometer module might just be the problem.

Im not sure the easiness of installing it your self.

I think if they sell the part then you might just be able to do it your self.

um take a visit to this website they have awesome low prices, great customer service, and easy to find parts.
http://toyotapartszone.com

hope this helps!

[Slipstream]

2jzmaestro,

The odometer module is very easy to replace and should only take you about 10-15 minutes.
First you have to Unscrew the 3 or 4 Screws that hold the Bottom of the Glare Shield on. Both the odometer Module and the ABS and Water and whatever else warning lights are mounted on this lower panel.
Once you duck down and have unscrewed all the screws very carefully pull the panel out just enough to expose the three plugs attached to the Odometer Module, Hazard Light Relay and the Warning Lights on the Right hand Side of the panel. Unplug them and then you will see that the odometer module is held in place on this panel by a further 4 or 5 screws.
Unscrew them and your're half way there.
With your fresh module repeat the steps making sure that when you plug everything back in nothing gets caught as you push the lower glareshield panel back into place.
Oh and by the way your car will now have 0 Kms on the clock.
Thanks for the web link to the parts.

Cheers mate!