JonHoward42 Posted July 4, 2015 Report Share Posted July 4, 2015 It seems relatively unknown but the climate control unit of the 986 can actually be used to pull out a surprisingly large amount of sensor information from the Boxster's onboard systems. I've tried this on my MY2000 986 2.7 and it works perfectly; I'm not certain it works on every 986 as I've read that it doesn't necessarily work on newer versions. *** Disclaimer, I didn't acutally figure all this stuff out. I first saw this working on an MY2000 Audi A3 (which uses pretty much the same A/C controls as the 986) and found the following information for the 986 on the web a couple of years ago *** The basic method to view this information is as follows:With the ignition on (or the engine running) press the 'windscreen vent' and 'recirculation' buttons simultaneously for about 5 secondsThe left display (which normally shows climate control temperature) will switch to either a 'c-code' or its associated sensor reading.If a sensor reading is showing, press the 'central dash vent' button to jump back to the 'c-code' selectionUse the '+ and -' buttons under the left display (normally used to set climate control temperature) to scroll through the 'c-codes' until you get to one you needPress the 'central dash vent' button to display the associated value for the 'c-code'Use the 'central dash vent' button to switch between the 'c-code' and value displaysPress the 'Auto' button to exit this hidden function and switch back to normal climate control functionalityThe various 'c-codes' and their associated meanings are as follows (yes, the list is far from complete):0c - ERL1c - Oil Temp?2c - Inside temp. Sensor mounted in the aspirator assembly at the side of the dash3c - Outside temp. Sensor located inside the air inlet of the A/C unit * (see below)4c - Outside temp. Sensor located in front grill of the radiator * (see below)5c - Outside temp. (matches OBC outside temp display)6c - Coolant temp.7c - Footwell discharge temp.8c - Sun sensor (dash top)9c - Sun sensor10c - Passenger compartment fan speed11c - Passenger compartment fan voltage12c - Temperature mix Flap command 1=COLD, 100=HOT13c - Temperature mix Flap position14c - Central Flap command15c - Central Flap position16c - Footwell/Defrost Flap command17c - Footwell/Defrost Flap position18c - Recirculation Valve command 1=OFF, 100=RECIRC19c - Recirculation Valve position (feedback)20c - Vehicle speed in kph, updating only once per second. (real speed, not speed+safety margin as in the speedometer)21c - Engine RPM in hundreds. This too only updates once per second22c - ?23c - ?24c - Sun sensor, exterior lights switch & panel lights control (term. 58 & 58d voltage) - used for A/C panel display illumination25c - ?26c - ?27c - ?28c - Fan speed?29c - ?30c - Engine run time in seconds (255 max.)(=0xff)31c - Timing counter32c - Displays test33c - Software version?34c - ?35c - Outside temp. from inlet sensor (filtered?)36c - temp? * - The data is fed to the Climatronic from the instrument cluster. When not moving, the instrument cluster OBC temp display retains it's last setting until moving. This is to prevent heat emanating from the radiator affecting the temperature sensor. The A/C unit uses the lower of the two outside air temp values in determining fresh-air temp. So this is certainly not a replacement for a PST2, PIWIS, Durametric or even generic OBDII tool but is undoubtedly handy at times. Hope you found this useful. Link to comment Share on other sites More sharing options...
JonHoward42 Posted July 4, 2015 Author Report Share Posted July 4, 2015 So an example of this feature to identify the current engine coolant temperature. 1. Identify the 'c-code' required - 6c in this case 2. Press the 'windscreen vent' and 'recirculation' buttons simultaneously for about 5 seconds: 3. Use the '+ and -' buttons under the left display to scroll through the 'c-codes' until you get to 6c: 4. Once the left display is showing 6c, press the 'central dash vent' button to display the associated value: 5. Now the engine coolant temperature should be on the left screen (89C in this case). Once you're done, either press the 'Auto' button to go back to normal cliamte control operation or press the 'central dash vent' button to switch back to the 'c-code' selection page: Link to comment Share on other sites More sharing options...
hikipuk Posted July 4, 2015 Report Share Posted July 4, 2015 Great stuff....Thanks a lot Link to comment Share on other sites More sharing options...
Duffy3074 Posted July 4, 2015 Report Share Posted July 4, 2015 Yeah good posting.Sticky Link to comment Share on other sites More sharing options...
mavis.d Posted July 5, 2015 Report Share Posted July 5, 2015 I've tried this before and been unable to get to work. Seen to remember reading somewhere that it only works on cars up to a certain age. Link to comment Share on other sites More sharing options...
mike597 Posted July 5, 2015 Report Share Posted July 5, 2015 I tried it also and couldn't get it working. The instructions I read were not as clear as your pictorial. I'll have another go now you're clarified it. Link to comment Share on other sites More sharing options...
mmarksx19 Posted July 5, 2015 Report Share Posted July 5, 2015 Works great on my MY2000 Boxster S. Many thanks. The coolant temp is far higher than that displayed on the temp gauge. Michael Link to comment Share on other sites More sharing options...
Guvs Posted July 5, 2015 Report Share Posted July 5, 2015 Wish this had been posted when I had a 986 !! Anything similar for the 987 ? anyone.Guvs. Link to comment Share on other sites More sharing options...
mike597 Posted July 5, 2015 Report Share Posted July 5, 2015 Would imagine you can get all this data and more from an app like torque or dash command connected to the OBD Link to comment Share on other sites More sharing options...
Gutley Posted July 5, 2015 Report Share Posted July 5, 2015 Didn't work on my 986. Suspect for once its too new Link to comment Share on other sites More sharing options...
PaulQ Posted July 6, 2015 Report Share Posted July 6, 2015 Yes, its very usefull.Mine runs at 88-89 when up to temp.Fans kick in @ 108 which drops the temp by approx 5 degrees, so if it goes much higher then this, something is amiss. Link to comment Share on other sites More sharing options...
bodster2008 Posted July 7, 2015 Report Share Posted July 7, 2015 Didn't work for me on my 2003 im afraid. Link to comment Share on other sites More sharing options...
Mrkevuk Posted July 7, 2015 Report Share Posted July 7, 2015 This does not seem to work for the facelift 986. Does anyone know if there is a workaround ? Link to comment Share on other sites More sharing options...
Jason986S Posted July 9, 2016 Report Share Posted July 9, 2016 Going to definitely try this tomorrow on my MY2001 986S. Been concerned the car is running hotter than normal at just under 90', so this will kill my curiosity and live monitor. Link to comment Share on other sites More sharing options...
vroomba Posted August 4, 2016 Report Share Posted August 4, 2016 So cool! Thanks for posting this. Link to comment Share on other sites More sharing options...
patlad Posted October 2, 2016 Report Share Posted October 2, 2016 Didn't work on my '04. Link to comment Share on other sites More sharing options...
JasonGee Posted January 24, 2017 Report Share Posted January 24, 2017 This just made my week. I've been wanting outside temp display on my 2000 986 S since I got it, but I just couldnt bring myself to spend £300+ on a Durametric just for that. It's very frustrating knowing all the equipment is there to measure these things but the system just isnt allowed to tell you. This worked perfectly, and although it first seems a little fiddly for everyday use, I found that once you've selected the C-code you want, it will stay on screen even after turning off the car and you can then easily switch back and forth with "Auto" for normal CC operation, and a quick tap of 'windscreen vent' and 'recirculation' to get outside temp back up. Brilliant. Link to comment Share on other sites More sharing options...
Nobbie Posted January 24, 2017 Report Share Posted January 24, 2017 Thanks for reminding me of this, just went to check and mine does this. Not sure about 1c being oil temp, when I looked it read 224 and the engine was turned off. Shame really as it would be interesting to see oil temp. 23 minutes ago, JasonGee said: This just made my week. I've been wanting outside temp display on my 2000 986 S since I got it, but I just couldnt bring myself to spend £300+ on a Durametric just for that. It's very frustrating knowing all the equipment is there to measure these things but the system just isnt allowed to tell you. This worked perfectly, and although it first seems a little fiddly for everyday use, I found that once you've selected the C-code you want, it will stay on screen even after turning off the car and you can then easily switch back and forth with "Auto" for normal CC operation, and a quick tap of 'windscreen vent' and 'recirculation' to get outside temp back up. Brilliant. I'm assuming you don't have the extra stalk for the OBD and this displays external temp on mine. Link to comment Share on other sites More sharing options...
Araf Posted January 24, 2017 Report Share Posted January 24, 2017 12 minutes ago, Nobbie said: Thanks for reminding me of this, just went to check and mine does this. Not sure about 1c being oil temp, when I looked it read 224 and the engine was turned off. Shame really as it would be interesting to see oil temp. Fahrenheit maybe? Link to comment Share on other sites More sharing options...
Nobbie Posted January 24, 2017 Report Share Posted January 24, 2017 31 minutes ago, Araf said: Fahrenheit maybe? Don't think so as with the other temp readouts it have a little 'c' to the right of the number. I'll have another play on Saturday when I'm out in the car as it may need the car running to work or something. Link to comment Share on other sites More sharing options...
PaulQ Posted January 24, 2017 Report Share Posted January 24, 2017 No oil temp sensor fitted, but the coolant one is usefull. Link to comment Share on other sites More sharing options...
That986 Posted January 27, 2017 Report Share Posted January 27, 2017 Works a treat in my 2000 S. Cheers. Link to comment Share on other sites More sharing options...
Jason986S Posted January 27, 2017 Report Share Posted January 27, 2017 Doesn't even work at all in my 2001 986S. Link to comment Share on other sites More sharing options...
CarlM Posted January 28, 2017 Report Share Posted January 28, 2017 Didn't work for me on my 2004 S ? Link to comment Share on other sites More sharing options...
PaulQ Posted January 28, 2017 Report Share Posted January 28, 2017 Only seems to work on cars up to year 2000. Link to comment Share on other sites More sharing options...
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