jhh1987 Posted May 29, 2009 Share Posted May 29, 2009 I recently got a check engine light that came on with a flashing O/D light, the diagnostic said it was a error code 42 for vehicle speed sensor. I check with my toyota dealer and they said I had to change the speed sensor 1. Well I currently don't have the money for it so I was wondering if driving the car for the time being with the error 42 on it will affect the car or damage in in the long term? I have an autobox transmission, will that error affect the gear change and damage the transmission? Thanks in advance! Quote Link to comment Share on other sites More sharing options...
Guigsy Posted May 29, 2009 Share Posted May 29, 2009 im not sure you have to change the speed sensor. its usualy a faulty kmph/mph converter isnt it? im no expert though as i have a uk car Quote Link to comment Share on other sites More sharing options...
jhh1987 Posted May 29, 2009 Author Share Posted May 29, 2009 I didnt have any conversion done, we use Km in Canada like in japan. Aparently the wires are fine, they said its the speed sensor that is old and is stuck now. Quote Link to comment Share on other sites More sharing options...
jhh1987 Posted May 29, 2009 Author Share Posted May 29, 2009 If anyone knows please tell me, i'm scared to drive the car in case it may damage it Quote Link to comment Share on other sites More sharing options...
probrox Posted May 29, 2009 Share Posted May 29, 2009 I've been driving mine with a code 42 since I de-restricted it last Summer, no problems so far. Is yours de-restricted by any chance? Quote Link to comment Share on other sites More sharing options...
Guest jtt97 Posted May 29, 2009 Share Posted May 29, 2009 http://www.mkiv.com/techarticles/trac_off_mil_odo/index.html basically you wanna jump pin 5 to pin 6 (on the connector to "ODO AND TRIP"). open up your odometer and solder a wire from pin 5 to pin 6. As you can see pin 5 is the signal from the speedometer and pin 6 is the output to the Ecu , which controls the cruise control and so fourth. basically if you ecu doesnt see the signal that comes from the speedometer , your cruise control will not work... I had this code for years and finnally the fix was to jumper these 2 wires together because the signal from the speed sensor was not going to the ECU because bad connections on the odometer cuircit board. Try to jump these together and you should never have this problem again. This is very common on supras. Quote Link to comment Share on other sites More sharing options...
Digsy Posted May 29, 2009 Share Posted May 29, 2009 Yep, its a well known issue and is very inlikely to be the speed sensor itself. I drove for about 2 years with an intermittent code 42 which in the end had the check engine and OD OFF lights flashing all the time (yes I know I'm bad). I got hold of a second hand odometer board and swapped it out and that fixed the issue. Quote Link to comment Share on other sites More sharing options...
jhh1987 Posted May 29, 2009 Author Share Posted May 29, 2009 I'm not sure if that's the problem, the mechanic told me that old speed sensors uses magnets and it gets "stuck" when they get old, he said he's seen it happen a couple of times. My question is if it is indeed the problem of the speed sensor, would it affect the gear shifting in my autobox trans and would it damage it? Hopefully it isn't the case. And mine has been de-restricted yet. Quote Link to comment Share on other sites More sharing options...
jhh1987 Posted May 29, 2009 Author Share Posted May 29, 2009 Yep, its a well known issue and is very inlikely to be the speed sensor itself. I drove for about 2 years with an intermittent code 42 which in the end had the check engine and OD OFF lights flashing all the time (yes I know I'm bad). I got hold of a second hand odometer board and swapped it out and that fixed the issue. And is it the odometer you changed or the speedometer also? Quote Link to comment Share on other sites More sharing options...
Ian C Posted May 29, 2009 Share Posted May 29, 2009 Out of the myriad code 42's we've seen on here over the years, I don't think a single one has actually ever been the sensor itself. It's either a problematic speedo conversion/delimiter install, or the odometer wiring getting dry solder joints due to age. -Ian Quote Link to comment Share on other sites More sharing options...
Digsy Posted May 29, 2009 Share Posted May 29, 2009 And is it the odometer you changed or the speedometer also? The circuitry that goes wrong is in the odometer. That's all I changed. Mine is an auto box as well. TO tell thr truth it did do some odd shifts sometime while the problem was manifesting itself. This has not re-occured since I changed the odometer out. As I said I drove my car for two years with the code 42 error before getting around to fixing it, and my car doen't appear to be any the worse. I do wish I'd fixed it earlier though, because it literally took five miuntes. See if any of the dealers on here have a 2nd hand odometer you could swap out. Quote Link to comment Share on other sites More sharing options...
Digsy Posted May 29, 2009 Share Posted May 29, 2009 I'm not sure if that's the problem, the mechanic told me that old speed sensors uses magnets and it gets "stuck" when they get old, he said he's seen it happen a couple of times. My question is if it is indeed the problem of the speed sensor, would it affect the gear shifting in my autobox trans and would it damage it? Hopefully it isn't the case. And mine has been de-restricted yet. Yes, they are magnetic. No, they don't have any moving parts inside, so there is nothing to get stuck. Quote Link to comment Share on other sites More sharing options...
jhh1987 Posted May 30, 2009 Author Share Posted May 30, 2009 The circuitry that goes wrong is in the odometer. That's all I changed. Mine is an auto box as well. TO tell thr truth it did do some odd shifts sometime while the problem was manifesting itself. This has not re-occured since I changed the odometer out. As I said I drove my car for two years with the code 42 error before getting around to fixing it, and my car doen't appear to be any the worse. I do wish I'd fixed it earlier though, because it literally took five miuntes. See if any of the dealers on here have a 2nd hand odometer you could swap out. I see, well its kinda hard since where I am there's about 5 supra in the whole city, finding a spare odometer will be hard. Quote Link to comment Share on other sites More sharing options...
Guigsy Posted May 30, 2009 Share Posted May 30, 2009 try superforums. im not sure a trader here would ship to canada. you can always ask nicely. as long as you pay then i dont see the problem Quote Link to comment Share on other sites More sharing options...
Digsy Posted May 30, 2009 Share Posted May 30, 2009 I see, well its kinda hard since where I am there's about 5 supra in the whole city, finding a spare odometer will be hard. Didn't notice you were in Canada! Hope you get it sorted out! Quote Link to comment Share on other sites More sharing options...
Guest jtt97 Posted May 30, 2009 Share Posted May 30, 2009 All you need to do is solder two of the wires together that are on the connector that plugs into the board for the odometer and it will fix all your issues and everything will still work perfectly. This is what pretty much all supra guys do here in the US instead of replacing the whole odometer which is really expensive and you would need to get the mileage set on it. This should only take you like 5 minutes to do. Whish I would have done that years ago. I drove with this issue for about 3 years before finally figuring it out. Quote Link to comment Share on other sites More sharing options...
jhh1987 Posted May 30, 2009 Author Share Posted May 30, 2009 (edited) I see i'll try that if i can't find a spare, the pin5 and 6 you were talking about right? Edited May 30, 2009 by jhh1987 (see edit history) Quote Link to comment Share on other sites More sharing options...
Guest jtt97 Posted May 30, 2009 Share Posted May 30, 2009 Yeah. If you do it correctly you will still count mileage. If you do it differently then it will bypass the odometer and not count mileage. Read the thread below and it should explain any questions you may have. Like I said I just jumpered the 2 wires together and everything is working now. fixed the following problems for me: 1. check engine light no longer is on. (Light was always on) 2. cruise control works great now. (Never worked) 3. Odometer records mileage acuatelly now. (Only worked intermitently before) http://www.supraforums.com/forum/showthread.php?t=349732&highlight=odometer+fix Quote Link to comment Share on other sites More sharing options...
Hrenowsky Posted June 11, 2009 Share Posted June 11, 2009 http://www.mkiv.com/techarticles/trac_off_mil_odo/index.html basically you wanna jump pin 5 to pin 6 (on the connector to "ODO AND TRIP"). open up your odometer and solder a wire from pin 5 to pin 6. As you can see pin 5 is the signal from the speedometer and pin 6 is the output to the Ecu , which controls the cruise control and so fourth. basically if you ecu doesnt see the signal that comes from the speedometer , your cruise control will not work... I had this code for years and finnally the fix was to jumper these 2 wires together because the signal from the speed sensor was not going to the ECU because bad connections on the odometer cuircit board. Try to jump these together and you should never have this problem again. This is very common on supras. Which two are the 5 and 6 pins? Quote Link to comment Share on other sites More sharing options...
Hrenowsky Posted June 11, 2009 Share Posted June 11, 2009 Found it. Cutted and spliced the pink one to the red/blue one. No more error code Quote Link to comment Share on other sites More sharing options...
Guest jtt97 Posted June 13, 2009 Share Posted June 13, 2009 Found it. Cutted and spliced the pink one to the red/blue one. No more error code Awesome, told you guys. This should be a sticky because I think almost every supra eventually will have this issue. It appears to be very common issue. Glad I could help. Quote Link to comment Share on other sites More sharing options...
adam82 Posted June 20, 2009 Share Posted June 20, 2009 Just wondering will the speed sensor fault effect anything else other than cruise control... Does the steering get stiffer at higher speeds on a supra? Awaiting the dufus comments but just a thought :-) Quote Link to comment Share on other sites More sharing options...
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