Since theres no real detailed info or thread on how to install and setup the digital input on the new V3 S300 using a PLX wideband, i decided to do it myself.

The two pins you want to connect to on the S300 V3 board is IN+(IN- for AEM and INNOVATE) and GND(optional).

Use the supplied cable from hondata. Im using the first black(GND) and purple(IN+)

To make this work you will be using the tx port on the plx and the cable that goes in it. Cut one end of the cable and get the wires ready to test. The tip is tx(transmit), center is rx(receive) and the base is ground. Your wanting to use TX and ground(optional) only. Use a meter to test which wire is which, in my case red is TX and RX is white and ground is bare. There are two ways to find this out is continuity and voltage. TX should read close to 3.3v and Rx should not read any. So in my case red goes to purple(IN+) and the exposed ground goes to the first black(GND)




Go into SMANAGER, parameters, digital in/out, choose plx for the type, click on the 0 spot on the channel list, choose wideband air/fuel on the channel details.

Next go to sensor setup in the options, scroll down to digital input 0 and click on it, change the display min to 10 and dispaly max to 20. dont worry about it saying volts, it will not read volts.

Next go to your display and put the sensor in the display to however you like it, it will be at the bottom of the list past the analog inputs, pick the digital 0. dont worry about it saying volts, it will not.

This was just a quick fast how to i decided to do to get the info out there for anyone else thats interested in doing this. if theres anything I missed, need correcting or if you want to add anything, feel free to do so. heres a quick vid of it working.
Here is the daisy chain info using the plx fluid pressure sensor module and plx tuner edition wideband. The top sensor module is the fluid pressure which has two channels. Im using 1 for oil pressure and 2 for fuel pressure. Bottom is tuner edition wideband. The fluid pressure sensor module is the first sensor module in the daisy chain so you keep the termination jumper in the module and take the jumper out of the rest in the daisy chain(which is the wideband module). Start off with tx(transfer) on the first module(fluid pressure) in the daisy chain and it plugs into the rx(receive) of the next module(wideband) and the tx from the wideband goes to the s300 digital board like i explained before in my earlier post. The s300 is always last in the daisy chain.

Next is setting it up in the smanager. The first sensor module in the daisy chain goes first on the digital input list. Since its a fluid pressure module, channel 1 which i have set for oil pressure is first overall on the list. Fluid pressure is next and the only thing different is you give it a instance number of 1, oil pressure instance number is 0. Wideband is third on the list and will have a instance number of 0 since its only a single channel. Naturally the rest the settings are obvious.

Heres the sensor settings, there pretty much the same as I explained before on my earlier post about the wideband.

Here is a short rundown on how to hookup the Aim MXL to the S300. You hook the RS232rx of the AIM MXL to the RS232tx on the digital board. Go into smanager and pick AIM MXL in the digital input settings.The rest is power and ground. Thats all you need to do.

Next I will show you how to use the customize sensor feature in AIM MXL racestudio software. I will only explain this section cause its the most complicated part of setting up your AIM MXL if you choose to use this feature. The rest is up to you reading the instructions and learning how to use the racestudio software. When you learn it, its simple. The reason why im using the the customize sensor feature is because the only external sensor you wire into the s300 that the aim mxl will display is wideband. I want the aim mxl to display my oil pressure and fuel pressure so you have to use the analog inputs on the back of the aim mxl. Here is the pin layout and plug i pinned out. Im only pinned it for three analog inputs and analog grounds. I will be using channel 1,2,3 for now. 0-5v only. I will have to buy another fluid pressure sensor module cause the sensor module only has one analog output.




Next you must figure out your voltage to value. My sensor module reads 0-150psi. Voltage is 0.025 for every psi of pressure. So 0 psi is 0 volts and 150 psi is 3.75 volts.

Next you must convert the volts to mV's. So 0 psi stays 0 mV and 150 psi is 3750 mV's. Next go into your customize sensor section and input these values liked I showed in the picture and make sure you press compute curve when your done and save. The rest will be explained in the AIM MXL instructions or you will have to find the multiple pdf file instructions on AIM's website.

Next I will show you my mounting setup i went with for my AIM MXL. I bought the mounting plate off of ebay which is only offered in carbon fiber(I dont like the look of carbon fiber). Then I had a specialist cut and mold(bond) the carbon fiber to my factory ek cluster bezel and paint it black. Here it is.

 

Thanks for taking the time to briefly explain this. I personally used a jack that could be soldered to. My question is wouldn't you need to connect TX and RX in a daisy chain setup since the V3 board "talks back"? When I get to that point I will be maxing out the 8 digital inputs with 4 O2 and 4 EGT PLX units that I already have.

 

Yes you can do that. Hondata tells you how to put them in a daisy chain. If I find it I will put in this thread.

 

I know you can daisy chain them hence the reason for having 8 digital inputs (this has been around before V3), I am wondering if you have to hook up rx AND tx for V3 since V2 didn't talk to the ECU on these inputs. Hondata also says you can have the Flex Fuel sensor and still have 8 inputs even though it isn't explained very well anywhere. I guess I should make yet another thread over there.

 

i hear you about things not being explained very well, thats why i made this thread but as far as i know so far you dont have to use the rx wire. from what i read the s300 should be the last thing in daisy chain, so from what i've gathered the s300 should be wired to the rx port of the last sensor module of the daisy chain. the first sensor module should be digital input 0 in the SMANAGER and the next sensor module should be digital input 1 and so on. make sure you read up on PLX's termination jumper in their support section on their website. read both the tuner edition and smafr manual file.

 

added to the faq

 

Sweet. If anyone does the daisy chain with multiple plx smafr sensor modules or other plx sensor modules to the s300 v3 digital input feel free to add to this thread.

 

well done! thanks for the writeup!

 

thank you and no problem. I was really frustrated with the lack of info on this process or the lack of a detailed step by step how to.

 

Which aem wideband are you using? I will update my original post and say which innovate and aem wideband your suppose to use. The aem your suppose to use is 30-2310 according to hondata but I think you can use the 30-4100 cause the blue wire is a digital output.

 

I am using the 30-4100 digital wideband. i just checked over the connections and all i did was replace the stock o2 with the AEM unit. It has 3 wires (black/red/white) red went to the fuse box black was grounded right next to the fuse box and white was ran to the AN0 on the Anolog connections in the s300 V2. I got my S300 V3 yesterday and notced i now have a new digital connection. Then i found this post. So yeah thats where i am i was going to connect it as before but im not sure if it was ever working correctly. I never adjusted the voltage offset either..

 

Very cool. As a rabid supporter of NepTune/Moates, I have to admit that this is a leg up for Hondata. There's so much that can be done once you start talking back and forth on serial.

 

You should have a blue wire that puts out a serial signal, which is what you need to connect to the digital side of the board. Make sure you have a in-line fuse wired in to your main power going to your aem wideband with a 5 amp fuse.
http://www.aemelectronics.com/digital-wideband-air-fuel-gauge-745
Click on the pdf file in this link for full instructions and wiring for your aem wideband. Like I said you should have a blue wire.

 

Hmmm i must have missed that blue wire.. But only because of the crappy Hondata instructions. so run an inline fuse for safety and connect the blue wire to ? andwhat about the white wire ?

 

The inline fuse is for the main power for the aem. I have my Main power for my plx wideband coming from the fuse box. And it comes on with ignition key in the on position. No the only wire you need to use is the blue wire. Blue wire from the aem should go to the IN- on the hondata board.

 

ok thanks man when i get a chance i will rewire it all. I dont keep my car at my house so i need to wait til next week and get it done. Im dieing to use the V3 i just got. I already checked out the Bluetooth with my iphone it was pretty accurate just a lil bit of lag but i expected it. It has many features i havent explored yet. Ill come back once i have it all ready..

 

ok thanks man when i get a chance i will rewire it all. I dont keep my car at my house so i need to wait til next week and get it done. Im dieing to use the V3 i just got. I already checked out the Bluetooth with my iphone it was pretty accurate just a lil bit of lag but i expected it. It has many features i havent explored yet. Ill come back once i have it all ready..



theres my bucket

 

Hell yeh. I like the JDM front, the color and the clean oem look. Keep us up to date with the aem hookup to the digital input. The big advantage for the digital hookup is the spot on accuracy from the gauge to the hondata datalog, no more voltage offsetting.

 

hey there, IWas about to connect the wideband today and started to double check if i should just connect the blue (serial) wire from the aem to the s300 v3 Digital ( IN- )?? So i read the aem instructions and it says the blue (serial) wire is supposed to be connected to a (RS-232 com port for hyper-terminal data logging)? So now im confused i dont want to burn the damn s300??

When i connect the cables that came with the s300 v3 to the digital connector (6) to be exact. the grey wire is ( IN- ) should the blue wire connect here ot to where it says (RS-232rx)(RS-232-tx) ????

 

Hondata says to use IN- for aem widebands. Since the aem blue wire sends a serial signal it wont damage anything. you definitely cant use rs-232-tx cause thats a transmition side of the rs232, rs232rx is receive. hondata says nothing about using rs232rx. put a meter on the aem blue wire to make sure its under 5 volts, im assuming it will be under 5 volts.

 

http://hondata.com/help/smanager/index.html

click on windows, then then parameters window, then digital input parameters

 

wow thanks man for doing this. I was going to try the plx unit for the wideband but I was not sure how it all wired up. this is great info. if you do more for the daisy chain post up lots of pics as well.

 

I already did the daisy chain. I have one more thing to do before I do pics and add to my write up sit tight and I will have more info up soon and hopefully some Aim digital dash display info as well here in the next month

 

can you explain the difference between digital and analog uses on the s300 board?
im not sure when digital or analog would be used.

 

Digital will give a more accurate datalog, but it cannot be used for closed loop corrections