Blut_VTEC Posted January 30, 2012 Share Posted January 30, 2012 Ok, so I just checked the CEL, and I believe there are 2 errors: http://imageshack.us/clip/my-videos/252/3zv.mp4/ 42: no.1 speed sensor signal circuit; all conditions below are detected continuously for 8 sec. or more: (a) No. 1. speed signal: 0 mph (km/h) (b) Engine speed: Between 1500 rpm and 4000 rpm. © Coolant temp.: 80C or more (d) Load driving 55: Knock Sensor Signal (rear side) No No. 2 knock sensor signal to ECU for 4 crank revolutions with engine speed between 2050 and 5950 rpm So.. uhm, where to begin ? I changed my cluster a few weeks ago, it's working fine, there is no converter installed Is error 42 maybe a result of changing the cluster ? The car does drives fine. Quote Link to comment Share on other sites More sharing options...
stevie_b Posted January 30, 2012 Share Posted January 30, 2012 So.. uhm, where to begin ? I changed my cluster a few weeks ago, it's working fine, there is no converter installed Is error 42 maybe a result of changing the cluster ? Error 42 could mean there are loose connections behind your speedo cluster. - Do you have a speed converter that converts from KPH to MPH? (I guess not if you live in the Netherlands). - Does your odometer work normally (i.e. does it count up as you drive along)? - Does your speedo work normally? Quote Link to comment Share on other sites More sharing options...
Blut_VTEC Posted January 30, 2012 Author Share Posted January 30, 2012 my speedo works fine Quote Link to comment Share on other sites More sharing options...
stevie_b Posted January 30, 2012 Share Posted January 30, 2012 If your odometer doesn't work, then either your odometer unit is faulty (specifically, the output buffer circuit) or the wire between your speedo and your odometer is broken/loose. Quote Link to comment Share on other sites More sharing options...
Blut_VTEC Posted January 30, 2012 Author Share Posted January 30, 2012 And code 42 could be the (Coolant temp.: 80C or more) When the temp is on it's hightest point in my car, the needle is exactly in de middle. Could that give me a error ? I'm giving as many info as i can, I don't know a lot yet of supra's Quote Link to comment Share on other sites More sharing options...
stevie_b Posted January 30, 2012 Share Posted January 30, 2012 No, code 42 won't be caused by the coolant temperature. Code 42 is caused by the ECU not receiving the speed signal. The coolant temperature check (along with the other checks) is so that the ECU is not trying to get a non-zero speed signal when the car's stationary. Post #4 lists the two possibilities. A fault in your odometer circuit is the most likely cause out of the two. You can bypass a faulty buffer circuit (thereby allowing the ECU to receive the speed signal) by performing a modification that I've described on here previously. Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted January 30, 2012 Share Posted January 30, 2012 An oscilloscope in the car would be the best tool to check a speed sensor signal was: A Getting out of the sensor B Where it was getting to, and where it stopped Same with knock sensor, but trickier. Best to do an electrical wiring integrity check between ECU and rear sensor connector, if it's OK fit a new sensor and hope. I think I have a known good used knock sensor if the price of a new one shocks you Quote Link to comment Share on other sites More sharing options...
Blut_VTEC Posted January 30, 2012 Author Share Posted January 30, 2012 But my odometer works fine..... I wil double-check that tonight when i'm back from work. Quote Link to comment Share on other sites More sharing options...
Blut_VTEC Posted January 30, 2012 Author Share Posted January 30, 2012 where is the #2 knocksensor located ? and can i test it if it's ok ? Quote Link to comment Share on other sites More sharing options...
Robzki Posted January 30, 2012 Share Posted January 30, 2012 But my odometer works fine..... I wil double-check that tonight when i'm back from work. It will work fine even with a dry solder joint/buffer circuit problem. Its a blue and a pink wire from memory, do a search it has been talked about a lot Quote Link to comment Share on other sites More sharing options...
stevie_b Posted January 30, 2012 Share Posted January 30, 2012 I didn't know your odometer also works OK. But as Robzki said, it's still probably the buffer circuit on your odometer at fault. If the odo works, it won't be the wiring between the speedo and odometer. Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted January 30, 2012 Share Posted January 30, 2012 OK, neither did realize that was working. It won't be the speed sensor itself then, a dash incomparability, soldered joint, or wiring problem sounds to be the cause. The rear knock sensor is under the intake manifold, as its name suggests, to the rear. You need it on a ramp with the undertray off to have any hope of getting at it without removing the inatke manifold. Even then it's a PITA. Quote Link to comment Share on other sites More sharing options...
Blut_VTEC Posted January 31, 2012 Author Share Posted January 31, 2012 yesterday I doublechecked the odometer and speedometer, they both work fine, I've resetted the ECU and took a test drive. Within 10 minutes I got a error. but only #55. I Think I just wait when error #42 occurs again. When the speedometer and odometer is removed from the car and u don't start the car but turn the key to position 2, does it send an error code #42 to the ECU ? I mean, is it's possible that it is stored in the ECU while I was changing the cluster a few weeks ago, and when there was really an error code (#55) and I diagnosed it, there were 2 errors stored ? Quote Link to comment Share on other sites More sharing options...
stevie_b Posted January 31, 2012 Share Posted January 31, 2012 Error code 42 isn't sent to the ECU when you just have the ignition on. The other conditions such as engine speed and coolant temperature make sure of that. Old error codes are stored in the ECU until you disconnect the battery for a minute or two. Do this, and try driving it again. That will ensure you are only seeing recent/"active" error codes. Quote Link to comment Share on other sites More sharing options...
Blut_VTEC Posted January 31, 2012 Author Share Posted January 31, 2012 I did reset the ECU, and i only got #55 this time Quote Link to comment Share on other sites More sharing options...
stevie_b Posted January 31, 2012 Share Posted January 31, 2012 You can forget about code 42 then, unless it re-appears. Note that it only appears after several seconds of driving at more than about 50mph ish with a warm engine, but I think you've got those points covered from what you've described, so you should be fine. Just code 55 to sort out. Quote Link to comment Share on other sites More sharing options...
Blut_VTEC Posted January 31, 2012 Author Share Posted January 31, 2012 Ok, I didn't drove faster then 40 mph yesterday..... I could not find info about #42 that I should drive faster then 50 mph I'll test it this week Quote Link to comment Share on other sites More sharing options...
Blut_VTEC Posted February 15, 2012 Author Share Posted February 15, 2012 #42 hasn't came back thankfully. But for #55 (knock-sensor 2), I removed the undertray and googled a workshopmanual for the supra, I know now a little how I can troubleshoot it, but I can't find my knocksensor : http://img715.imageshack.us/img715/6931/suprad.jpg Does anybody have a good picture of knock sensor 2 on a 2jz-ge engine ? Google didn't found any good results Quote Link to comment Share on other sites More sharing options...
Blut_VTEC Posted February 18, 2012 Author Share Posted February 18, 2012 I've located the second Knock-Sensor. -Are the knock-sensors from a European twinturbo model the same as the N/A J-spec model ? -I can barely reach the sensor with my fingers, what is the best way to replace it ? remove the starter ? or the Intake ? Quote Link to comment Share on other sites More sharing options...
Blut_VTEC Posted February 20, 2012 Author Share Posted February 20, 2012 nobody ? Quote Link to comment Share on other sites More sharing options...
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