Matt Harwood Posted March 13, 2002 Share Posted March 13, 2002 I'm in the process of installing my RLTC unit and have a couple of quick questions for those that have done this before. 1, The sheilding around the abs harness. Does this need to be earthed? 2, Is the diagniostics led/plug required? - I know it needs to be easily accesible, but does the led need to visable during normal driving conditions? Thanks! Quote Link to comment Share on other sites More sharing options...
Guest Martin F Posted March 13, 2002 Share Posted March 13, 2002 1. It doesn't say that the shielding on the ABS harness should be grounded, but on both installs i have done i have grounded that screening. Put an eyelet on and place it under a convenient bolt. 2. Best thing to do is to plug the diagnostic harness in and then whe you are not using it coil it up under the carpet or something. Obvioulsy removing the diagnostic plug from the end. You may need to use it from time to time and you don't want to be pulling off panels just to get to it. HTH Quote Link to comment Share on other sites More sharing options...
Matt Harwood Posted March 13, 2002 Author Share Posted March 13, 2002 Thanks for that prompt reply Martin. Obviously earthing the screen doesn't hurt then, so I'll do as you have and earth it as well. Quote Link to comment Share on other sites More sharing options...
THOR Racing Posted March 13, 2002 Share Posted March 13, 2002 You normally only need earth one end. If you earth both ends you sometimes get ground loops where the ground at the sensor isn't quite the same voltage as the ground at the control unit. This can cause noise as a voltage differential means there a resistance path and that means current must be flowing and hence where current flows you get induced pick etc etc. Not good on transmission lines. I doubt it'll make much difference in this case, better stick to what others have done. (Cannot remember what mines like sorry) Pete Quote Link to comment Share on other sites More sharing options...
Phil Wall Posted March 13, 2002 Share Posted March 13, 2002 Mine is not earthed as I thought the other RLTC end was. I put the setup cable and lamp behind my passenger side footwell carpet, it is very accessable and does not show. Quote Link to comment Share on other sites More sharing options...
Graham Rudd Posted March 13, 2002 Share Posted March 13, 2002 1. I didn't bother earthing mine. 2. I hid it under the gear stick gator (manual). Very easy to get hold of when needed, which is very rarely. Graham Quote Link to comment Share on other sites More sharing options...
Matt Harwood Posted March 13, 2002 Author Share Posted March 13, 2002 Cheers guys, varied options here... Well mines earthed. It's all in but I havn't tried to calibrate it yet because, as per a previous thread, the last time I jacked the car up, I almost flattened a chassis rail! - I'm going to get a local garage to lift the car on a 4 post lift tomorrow. I've left my manual at work, how do you get the system into calibration mode? - I drove home with the diagnostic plug in and I'm getting all the right readings from the rpm and all wheel speed sensors. (And the car still runs properly so I must have got something right! ) Are there any special tips for calibrating? BTW the Field harness is a godsend! But did anyone that used on have any difficulty replacing the plastic ecu cover? Quote Link to comment Share on other sites More sharing options...
Andy Metcalfe Posted March 13, 2002 Share Posted March 13, 2002 Chuck that cover away mate!! Thats what the rest of us did from day one !!! Quote Link to comment Share on other sites More sharing options...
Matt Harwood Posted March 13, 2002 Author Share Posted March 13, 2002 Looks like that may be an option Andy! After a discussion off list, I believe that jacking the car to spin the wheels is simply a test and nothing to do with calibration. My reason for this conclusion is that the RLTC monitors ALL the wheels and induces fuel cut when wheel spin is detected. So, it shouldn't matter which wheel is spinning for this to happen. Is this a correct assumption or should I call RL to confirm? No need to answer my previous question about how to engage calibration mode... I know now. Thanks. (Edited by Matt Harwood at 11:08 pm on Mar. 13, 2002) Quote Link to comment Share on other sites More sharing options...
Guest Martin F Posted March 13, 2002 Share Posted March 13, 2002 Never done the rear wheel spinning test on the cars i have done. I think after you have calibrated the unit and checked with the software that you have info coming back from all four wheel sensors then you should be all done. Also if when your all done you select the wet option and boot it coming off a roundabout (disclaimer about supra's + ditches = breakers) you should soon feel the RLTC cut in even in the dry. This is better done (i.e. more noticeable) if you have uploaded a Phil.dat file. Quote Link to comment Share on other sites More sharing options...
Phil Wall Posted March 13, 2002 Share Posted March 13, 2002 Quote: from Matt Harwood on 11:06 pm on Mar. 13, 2002[br]Looks like that may be an option Andy! After a discussion off list, I believe that jacking the car to spin the wheels is simply a test and nothing to do with calibration. My reason for this conclusion is that the RLTC monitors ALL the wheels and induces fuel cut when wheel spin is detected. So, it shouldn't matter which wheel is spinning for this to happen. Is this a correct assumption or should I call RL to confirm? No need to answer my previous question about how to engage calibration mode... I know now. Thanks. (Edited by Matt Harwood at 11:08 pm on Mar. 13, 2002) The unit works by constantly comparing reference (front) and driven (rear) wheel speeds and hence can determine slip. Depending on what you dial in and the amount of slip detected the injectors are cut progressively. I did my install by the book and spun up the rears on axle stands, it misfired like hell so I guess it works. To get the feel of it working, find a nice wide junction set it to wet and give it some on the way out. You will feel cut in and prevent any major drift. Obviously you do this entirely at your own risk. Or you could try my favourite, empty road in the pouring rain, straddle the white line and floor it, on wet or 5% setting. I have managed 0-100 and kept it over the centre line. Quote Link to comment Share on other sites More sharing options...
Matt Harwood Posted March 14, 2002 Author Share Posted March 14, 2002 Doh! - It's dry today... Still good ol' British weather. I'm sure it won't stay dry for long... (Too scared to floor it off a roundabout in the dry for fear of matching Martins equation!) Quote Link to comment Share on other sites More sharing options...
Phil Wall Posted March 14, 2002 Share Posted March 14, 2002 Be prepared to wash your car ,but RL suggest a test with one wheel on a verge and the other on the road, the wheel on the verge will try to spin, if you use wet setting you will feel RL do its work. The trouble with RL is it works so well you just dont notice it working, when I have done test runs (with someone looking at the laptop) the first stage injector cuts are so subtle you just can't feel them through the car. It is not until you reach the higher cut levels that you can feel it. The exit from a junction always gives a pulse feeling to the back end as the wheels are allowed a little slip but not enough to induce lateral or sideways slip, that would otherwise put you into a tricky situation. Quote Link to comment Share on other sites More sharing options...
Matt Harwood Posted March 14, 2002 Author Share Posted March 14, 2002 :biggrin: :biggrin: :biggrin: :biggrin: :biggrin: :biggrin: :biggrin: :biggrin: :biggrin: :biggrin: :biggrin: :biggrin: :biggrin: :biggrin: :biggrin: :biggrin: :biggrin: :biggrin: :biggrin: :biggrin: :biggrin: :biggrin: :biggrin: :biggrin: :biggrin: :biggrin: :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :biggrin: :biggrin: :biggrin: :biggrin: :biggrin: :biggrin: :biggrin: :biggrin: :biggrin: :biggrin: :biggrin: :biggrin: :biggrin: :biggrin: :biggrin: :biggrin: :biggrin: :biggrin: :biggrin: :biggrin: :biggrin: :biggrin: :biggrin: :biggrin: :biggrin: :biggrin: Do I need to say any more! Quote Link to comment Share on other sites More sharing options...
Guest Martin F Posted March 14, 2002 Share Posted March 14, 2002 Well as long as you have :biggrin: at the end, then we'll guess that it worked as it should. Quote Link to comment Share on other sites More sharing options...
Phil Wall Posted March 14, 2002 Share Posted March 14, 2002 So did it rain? Quote Link to comment Share on other sites More sharing options...
Matt Harwood Posted March 14, 2002 Author Share Posted March 14, 2002 Oh yes! In fact it started snowing at one point. I have to admit, every time I floored it out of a junction My knuckles went white. I was just waiting for the back to let go... But it didn't. Must try to not let this new confidence go to my head! - I was driving like it was dry.... All for the sake of experimenting of course.... And very slowly... Didn't break the speed limit once! :biggrin: Quote Link to comment Share on other sites More sharing options...
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