Quite some time ago during some emission’s failures I sought a way to interact with my greddy emanage blue. I had tried other DIY’s but they were somewhat unclear and I never had results. I set out to see the full picture and work with the right parts instead of hoping that a specific usb phone cable would be the part I was looking for. Here, and I must say I’m a bit late with this older system, I will try my best to provide a detailed description on the wiring and a guide on how to achieve the creation of this cable which would otherwise cost over 150$ USD from Greddy dealers. The Greddy Emanage cable is NOT just a simple USB-USB, and it is also not the run of the mill usb-serial connector. What it really is, is described later.

Guide Requirements:

-Basic wiring/soldering skills
-Laptop with Windows XP (or similar)
-Willingness to buy parts from eBay (Rs232 TTL converter)
-Spare USB cable to cut up (USB-A, the flat rectangular kind)

Step 1 – Acquire Parts

You will need a USB-A cable, just one end. If you can, find an older piece of computer equipment you dont need (i.e. a mouse) and cut the end off, leave as much length as you can. The other piece of the puzzle is a 5-volt RS232 to TTL Converter. These are rather common and can be found locally if you have a good electronics shop, otherwise eBay works great. There are hundreds of these listed, often below $10.00 USD (shipping included).

The standard serial port communicates with voltages levels -/+10v, however communication with the Emanage requires a range of 0-5v as it is a Logic Level device. You will need one of these that will accept an operating voltage of 5 volts.

Step 2 – Construct

Strip your usb cable, there will be a foil and/or braided meshjust below the plastic. Using your hands pull this back and unravel it to reveal the four wires on the inside. They are most commonly coloured as red/black/white/green though can be any colour combination. You can simply cut off the mesh/foil shielding for this. Strip the end of every wire (very little needs to be showing, perhaps 2 or 3 mm.

It’s time fire up the solder gun. Look at your converter and find where the +5, Ground, tx and rx outputs are.  They should be labelled or your part should have instructions. Here is where the USB connector wires should go to, use the chart and the image pinout of the usb to link it all together.

USB Side Converter Side
vcc +5V
data – rx
data + tx
GND Ground

Be sure to use a multimeter to check that you really have vcc, or gnd, etc before soldering into the board. Here is a picture of my end result:

Step 3 – Software

Emanage can be downloaded from this emanage group on yahoo. Sign up, and download e-manage149.EXE as well as v1.11.rar. Use winrar (provided on same group) to extract v1.11.rar then find and run the setup.exe. Following that run e-manage149.EXE, it will ask for an extraction directory and defaults to a temporary directory. This must be changed, change this to an area such as c:\temp. I’ve never found this update to install correctly, often failing with non-english errors. When that happens, exit out of it, and navigate to the directory where the files were extracted to. Copy all files except eUp.ini and eUp.exe. Move these files over top of where you installed the management tool 1.11 (defaults to C:\Program Files\TRUST\GReddy e-manage support tool).

Step 4 – TUNE

Plug the cable into your computer before loading the program. Turn on the car (ACC) and then start emanage. Once connected its all up to you. The program may ask for a main unit update, in which case allow it to do so. If it prompts for a file, select the one that shows up in the dialog box or look for one within the emanage program directory.


I hope you don’t have to read this, fortunately I ran accross many problems and maybe I have a fix for you.

The tool reports itself as online, but when I try to do anything it says “MAIN UNIT UPDATE” and “Corresponding… Please Wait”
I had this happen when the rx and tx wires were backwards. I’ve heard others having this problem, I think they just had the wires backwards. Also ensure your emanage is at its latest.

It keeps asking for a password, why?
Greddy’s preconfigured maps are protected so they can’t be tampered with. Simply overwrite the map to get past this. I believe a main unit update may do the same as well (communications menu)

Can I use a USB – Serial adapter for this?
Yes, I have used one with no troubles. Most newer laptops do not have the serial port.

Still not working…
Still? Time to check the wiring. You’ll want to go as far back as checking the serial port from your computer. There is a method called a loopback test. Essentially this involves using windows hyperterminal and jumping the correct pins, and making sure the data the computer sends out routes back to itself. If you see an ‘echo’ of what was typed, you know its working up until that point. It takes some detail, but there are PLENTY of resources on it. Start here.

After the serial loopback test is confirmed working (if not your laptop is busted). Its time to do a Converter side loopback test. This involves the same idea. Put the converter into your serial port and jump tx and rx wires, this wont work until the board is fed with voltage (5v). An easy way to supply voltage is to get two wires with stripped ends, rig three AA batteries together in series and use electrical tape to get a wire at each end on the contact. Then put the positive wire to V5 on the board and the negative side to the GD (ground). Run loopback test and ensure your converter works. To do all this it is likely easier to cut off the USB side and strip the ends of the wires to get easier contacts then reconnect everything once tested working.

If the serial port and converter both test working, then the problem is likely with the port settings in emanage. Make sure your using the right COM port (or just try each one). You can also navigate to control panel -> system -> device manager -> Ports and play with the settings there. I believe the most common settings are 9600 bits per second, 8 data bits, no parity, 1 stop bit, and no flow control for best results.

Good luck! If this has helped you let me know!

*Added 7/10/2012*

Download – Greddy Turbo Kit Installation Instructions (Acura Integra)
Download – Greddy Emanage Software Manual
Download – v1.11 Emanage
Download – v1.49 Emanage Update


  • Hi Mike,
    I just got done trying out the emanage cable and it did not work.   I'm getting 5v from the emanage but when I test it at the rs232 to tll converter, i'm only getting 2.3v?  If I remove the converter from the picture, I get 5v at the end of the usb harness but once it's plugged in, the voltage drops down to 2.3v.
    Any Ideas?  It will not communicate with the emanage software tool at all.  I just keep getting the steady yellow light regardless of which com port i'm on.
    I know my stuff works because I have tuned before using my friends greddy cable. 
    Thanks in advance Mike!

  • Hey Joe,

    I can’t remember if my device actually operated at 5v, I think it actually dropped down to ~3.5v. I’m not quite sure the reasoning for that. My harness is no longer on the car so I can’t confirm. Best idea right now is to go to the basics and work your way up. Don’t even bother with the emanage right now. The bottom of my post gives some info on the serial loopback test. What you want to do is work your way up to see if the device is working before you even touch the emanage. So, just to be sure, follow a guide (first result on google in the link provided on the post is really handy as of this month) and work on jumping your serial port pins — see if you can get a loopback working there. Then, next test is to plug the adapter in and jump the rx/tx pins and see if that gets you a loopback (you will need to put some AA bateries in series to power the adapter, or use the emanage or computer PSU, etc). Then if that works, the cable is good but the settings used to connect to emanage are likely off. The emanage won’t change colour or state of LED upon cable connectivity IIRC. I believe it only changes once fully connected, which may mean the cable could be correctly constructed, but the settings are not right. So start on the loopback at the serial port and work your way up.

  • I got this RS232 to TTL convertor off of Ebay recentlly and soldered up the USB wires to it but when connecting it to the laptop it had NO connection (OFFLINE). My question with my convertor is that it had NO jumper pins soldered in the board itself, so….does it matter if they arent there and if it does matter then what should they be set at?

  • Mine came with jumpers for handshake options however I believe none of those are used for communication for the unit. Do a quick loopback test and see if your board is set up correctly.

  •  hi we are using zippys mouse suddenly what happen means the cable get separated from mouse so in that cable is having 4 wires one is (1)red  (2)green (3)black and (4)white so which colour wire have to connect to which wire  .in that mother board their is (1)gnd (2)v dd (3) data (4)clock   so please how to connect the wires tell me as soon as possible kindly

  • Hi Sikku,

    When you say motherboard do are you referring to the desktop/laptop or the RS232 to TTL converter? If it is the desktop/laptop it will not work with a direct connection to the serial port. If this is the RS232 to TTL converter, I’d have to see more to help. Do you have any more specifics on the converter itself? Any documentation or links to where you purchased it?

  • can you go to ebay and link me a converter that will work. i try to buy the model you have but i couldnt find it on ebay. or would this one work? http://www.nkcelectronics.com/rs232-to-ttl-3v–55v-convert232356.html

  • @Sher: That looks like it should work just fine!

  • hi there, i just followed your tutorial, im from mexico, and i want to tune up the emanage but i cant just the cable get work, i found the rs232 to TTL at 5 votls with 2 leds of RX and TX, I used a voltimeter to check that sends 5 votls, and its says 5 volts, the leds turn on when i connect de usb to my computer… my compurter as many dont have any serial port, so i used a serial to usb converter, and when i connect the converter to the cable that i made, the leds dont turn on… when i try to connect to the emanage, the software says its offline, even after i put the comm ports right…

    i dont know whats happening, ho another thing, when i check the volts coming out of the converter, its says 20 votls… and there is where i got stuck… any help culd be usefull… and thanks a lot !!

  • Hi rodrigo, definitely carry out the loopback test which is talked about in the troubleshooting section. I had the same problem first time around where it wasn’t working out to well for me. Turns out I just had rx and tx flipped or something simple that I found out with a loopback test. Simply using a voltmeter is not enough for complete troubleshooting. 20 volts is normal I believe, as serial and parallel ports work with that voltage. You should not see 20 volts on any of the wires that would normally go to the emanage (but going into the female serial port there should be).

  • hello mike, thanks for response, i apreciate it…

    i tried to connect it yesterday, and i try the hiperterminal test, (i cant do the loop back because my connector do not have jumpers) and i connect it to the emanage to power the leds that i have on my converter… i put the com ports, correctrly to operate, and when i pulse a key on my lap, it starts to flash the TX led, so the connections must be right… so i started to read that the e manage, because i have the e-manage color gold, not the shwap that other people do, they sold me de original gold… and i readed that only exactly the 1.24 software works with the gold version… and yesterday i downloaded the software (after 2 days looking for it) and im gonna try to connect it tonight, and see what happen…

    if that does not work, im gonna try your loopback test, i dont know how but im gonna try, and if that does not work again, im dont know what im gonna do hahaha

    this is the page of the connector, its in spanish, so if you understand something that would help…


    thanks a lot !! and i will keep you posted

  • Looks like the right adapter, nothing wrong there. For loopback, its quite easy, just wire together the rx and tx ports on the adapter (by the looks of it, the two on the outer edge). Also the loopback required for me to put around 5 volts on the power and ground to confirm it was working. I just stuck some AA’s (2 or 3) together (in series the voltage adds up) with electrical tape, with wires on the each end of the series to quickly test. See if 1.24 works, then work on the loopback test.

    As for the hyperterminal test you did, I don’t think that would confirm it was working or not, however, I think you’re close to having this solved.

  • Hello Mike,

    I did the loopback test, i connected the RX and TX with a little cable, and i put a batteries on the other side of the cable, i connected with the adapter and with hiperterminal, i put comm port 2 because is the only free port that i have, and i started to type on the board, and the leds started to light up, and in hiperterminal started to type what i was writing…

    so, when i open the emanage software its says offline ALL THE TIME, never come online unless i choose another comm port, for example comm 1, but that port is used by another application or hardware…

    i tried the 1.20, 1.25, 1.40 and 1.49 software… with my emanage gold, and never goes online… the only thing that i see is the orange led, of my emanage, blinks only 4 times but only 1 time in 40 tries of connecting to my laptop

    any suggestions ? and im asking you because i dont have anyone here in mexico that knows about the emanage…

  • So you tested with batteries to the +5v and Ground, and looped the rx and tx? Then I think you are good on the cable side. Just double check that your RX and TX are not backwards — check with the chart and make sure the rx is going to the correct spot on the end of the USB cable that goes to the emanage with the multimeter. You could also check to make sure you are seeing 5 volts on the converter (put probes on the GND and the VCC on your circuit when the car is turned on to accessory)

    As for your emanage, you have it fully wired into your car? Does it work normally when the car is running? Does it have a constant orange or green blinking light? If not you might have some kind of wiring fault with that that may have to be looked at first.

    Lastly, did you set the correct port options I listed in the end of the tutorial? 9600 bits per second, 8 data bits, no parity, 1 stop bit, and no flow control? I remember that the emanage wont go online until you force the software to connect through some menu, I believe.

  • ^ Make sure you set the port settings in device manager, not just emanage

  • Hello mike,

    about the cable it looks that it works fine, i belive its my emanage…

    i wired up the 12 volts cable, ground, 1 cable for MAP and the other to ECU, the gray for the TPS, and the brown for the RPM signal… thats it, i did not connected the ignition and injectors because i wanted to make comunication first with my emanage… then connect that cables for more control of my car…

    my car its a vw, thats only sell here in mexico, but the emanage seems to work correctly, the green led lights when the rpm reaches 2000, 3000, etc… when its off, the led its steady… but when i turn on my car the led starts to blink and the orange led of communication always blinks slowly…

    about the comm ports, im using a usb to R232 converter, with the drivers and the comm port i choose is 2 because is the only free port that i have on my laptop

    i im gonna try something else, (i belive is the only solution left) like checking the outputs of the female usb from emanage, and see the voltages there and see if theres the problem…

    THANKS A LOT MIKE !! you help me a lot !!!! and i will keep you posted, to see if it works !! 😀

  • Let me know! I’m truly baffled. I was going to suggest checking your wiring but that is all correct, and I recall that being the default behavior with the lights when the car is running. It shouldn’t matter on the make of the car to connect to it, I believe, so long as it is getting power at least the laptop should be able to connect to it.

    Just for kicks, if you want, try reversing the RX and TX wires in the usb cable that goes to the emanage and see if it makes a difference.

    Also again, be sure the device manager is set up correctly. http://www.signmax.us/Achatenligne/images/changecom.jpg

    Try moving around com port numbers, and ensuring those values match up with the ones I recommended. I would do this first before messing around with anything else! 🙂

  • hey mike, i have just instaled a greddy emanage blue on my car and i bought the cable with the ecu, but my laptop doesnt have a serial port, so i got a serial to usb adaptor, but it wont communicate with my laptop. it just says offline?? please help!

  • Such a wonderful post! I have no clue how you came up with this post..it’d take me weeks. Well worth it though, I’d suspect. Have you considered selling ads on your blog?

  • Hello Mike,

    I’m about to try this, does the computer have to have native Serial port or will USB-Serial convertor work to use with newer computers thanks.

  • i got cable usb to usb can use in this in my laptop coz no comport

  • http://www.robotshop.com/inex-ucon232s-usb-to-serial-1.html
    I’m just wondering if this will work if I plug the usb end into the emanage and use mu serial to usb adapter at my laptop end.

  • Do you think I would be able to use a normal usb to serial adaptor cable for communication?

  • ^ I was also wondering the samething Tung

  • Will this work with emanage blue? thank you

  • HI all, most of the questions asked are answered in the article itself.
    Derek: Yes this is made specifically for emanage blue. I believe emanage ultimate uses a straightforward usb cable.

  • Hi Mike,

    I’m just about to make my own cable thank to your DIY topic which is awesome !

    But I got one question because on the market you can get 2 versions of 5-volt RS232 to TTL Converter,
    the first one is using the chip : SP202 MAX202 and the secon one is using : ST3232

    Both are working from 3V – 5V

    Which one should I buy ?

    Thanks a lot,

  • Hi Peter,

    I’m not experienced enough to take in most of the technical sheets for both, but I do believe they both perform the same function so it should not matter (so long as its all prewired for you). The ST3232 appears to be a newer, more advanced chip. Whether or not it will make a difference for this application I do not know.


  • @Eddie-Looks good to me!

  • I can’t find proper “Rs232 TTL converter” unit on ebay or the one with usb already, please help.

  • Hi bud
    This might be a good chance for you to make a little cash on the side. You should build this cables and sell them on ebay 🙂

  • Hey Mate,

    Thanks heaps for this guide, helped alot.
    I built a modified version which is usb to TTL to usb.

    I used this: http://www.ebay.com.au/itm/200805058916?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649#ht_3899wt_1397

    This is just a ttl to usb device, instead of ttl to serial.
    This elliminates the need for a serial to usb converter.
    All for $9 express delivered.

    The pin out listed above was different using this board.
    i had to switch the green and white datawires to get it to work correctly.

    The BIGGEST issue is the drivers.
    The only why i got it to connect to windows correctly was using old vista drivers.
    My currect laptop runs windows 8 and WILL NOT WORK.
    I ended up using my fathers o

  • … old work laptop.

  • Installed windows 7 and it finally works!
    Still use the vista drivers though.

  • Hi Michael,

    I just want to clarify you modification. Your modification was you use the ordinary usb and connected it to the pl2303 instead of rs232 ttl? Kindly give me feedback so that i can adopt your modification.

  • Hi Rommel, the USB converter was only there because my laptop did not have a RS232 port. As others have mentioned there are now USB TTL boards on ebay which are identical to the board in the article, but already with the USB connection ready to go. This would be easiest as serial is generally very rare nowadays.

  • @Michael thanks for the tip! I can’t imagine the amount of driver issues some people will have when they switch over to Windows 8!

  • Hi Mike,

    First would like to thank you for all on the information, you’ve shared to us. I manage to have this Serial TTL converter to work with my Emanage, however on my part I need to short several pins on the DB9 side(pin 4,6,8) and my communication link to emanage start working as expected.


  • Hello Mike..
    Recently Got e-manage….I Have Laptop With Serial Port Luckily And I Got Emanage With Complete IGN And Injector Harness Along With Cable(USB To Serial)

    When I Connect Cable with Laptop And Open Support Tool …It Shows Online And On Top Bar Shows Communicating Real Time

    None Of Options Are Activated And On Retriving Data Or Main Unit Update (Ver 1.11)….Message Shows Communication Error……!

    Using Windows 7..Check COM Settings….Device Manage And Emanage Both Are Set To COM1…It Showing Online On COM1 Also But Not Responding…..!

    Tried Version 1.11 And Update To 1.49….Same Response……

    Running Out Of Ideas..Need Help

  • “Along With Cable(USB To Serial)”

    This is a Greddy cable? Or one that you made? A plain USB to Serial cable will not work in most cases, hence why I wrote this article (needs to have TTL conversion).

  • Well…I Wrote The Comment Yesterday Before Checking Cable….I Have In Mind The Cable Is Actually A USB to Serial (WITH TTL Thing) But After Countless Tries….

    I Decided To Open Cable And There I Find Just A Plain PCB With Wires Connected…NO TTL thing….!

    Here Its Hard For Me To SOurce That RS232 To TTL…Either Dig In JUNK …What About Serial TO USB Convertor??? Will That Work????

    Thanks For The reply

  • Updates

    Bought One USB TO Serial With pl2303 chip in hope it will work out…..i can’t get it detected on windows 7….:( Code Error 43..

    have to hunt for something which Michael mentioned above or have to hunt for the rs232 to ttl if i got lucky….!

  • Uodates #2

    Luckily Found Rs232 To TTL Board MX3232 As Well As USB To TTL Pl2303 With One Of guys Who Sold Electronic Stuff For Enginerring Projects…! Ordered Both Of Them…Lets See What Goes..!

    I Think The USB Type TTL Based Pl2303 Will Work Also…Its A Direct USB To TTL In Cable With 4 Wires Out…And Confimed That It Works On WIN-7

    The Normal USB To Serial Convertor Was A Simple Waste….I Doubt If It Even Work On Win Xp Or Not..

    Will Update Soon

    Thanks For The Help


  • Update # 3

    Its Working…Voila…:) Import Data And Export Data….Connects Like A Charm…!

    USB TO USB Cable Which Fully Supports Win-7 x64 Without An issue……Hook It Up And Works On Very 1st Go…..!!
    Wires Goes As Above…..Which Makes Green Goes To White And White To Green When Joining Both Cables…!

    Thanks For The Help Mike….!

  • Glad to hear 🙂 thanks for sharing!

  • Hi.

    does a USB to serial adapter do the trick????