DIY: ECU Scantools/Data Cables

[michaelw]

Try this. send AT SP0 to the cable through hyperterminal or your scan software. This will tell it to try ALL protocols when it has trouble. The chip has a 'feature' to remember the last protocol it used and if you are swapping it around it could get annoying.

For more info check page 11 of the data sheet.

http://www.elmelectronics.com/DSheets/ELM327DS.pdf

Mike

[Chev_SS]

Does anyone know where i can purchase an interface cable for a series II VY commodore SS.

I have downloaded the trial version of EFILIVE but i need the cable.

Thanks

[michaelw]

I have made an addition for those who have a GENIII and can program microcontrollers.

Mike

[michaelw]

News just in. EFILIVE has definition files for VX and VY V6's

Mike

[OZ38]

Originally Posted by michaelw

News just in. EFILIVE has definition files for VX and VY V6's

Mike

This sounds like good news, but can you tell us what It means for us now ?

Cheers

Deek

[Chris76]

Hi Guys,

Can anyone provide a copy of the standard bin files/maps for the VS ECOTEC amnual as Im conveting to manual form auto. Please PM me if you can help

[michaelw]

Originally Posted by OZ38

This sounds like good news, but can you tell us what It means for us now ?

Cheers

Deek

You can see what efilive can do before you make/buy a cable, dowload efilive (the version on the server comes with the VX/VY V6 files) and after it is set you go to file->select vechicle and load the file. Some VX's may have a problem with the supplied file (see attached for a corrected file).

Mike

[Mike:)]

Ok I have done the work for you Here is all the info you need to make your very own ALDL link. I have done it, and it works on my VX II commodore.

Attatched are the schematic, part layout, and PDF for making a PCB for your link.

There are three options for powering this circuit

Option 1 on the car side use Ground Data and 12v // on the PC side use pins 2, 3, and 5

Option 2 ointhe car side use ground and Data/// use a 9V battery on the power in pins /// use pins 2,3,and 5 on the PC side.

Here is a link to download an ALDL tester to test youe citcuit BEFORE you hook it up to your car!!!
http://www.ttspowersystems.com/softw...setup-ALDL.exe

Here is a link to the circuit that I used.. It seems to be the best.
http://students.fct.unl.pt/users/lat...link_cable.htm

Note you have to conect pins 1,4,6 and 7,8 at the serial port plug.

Here is a link to the serial plug pinout:
http://www.cisco.com/univercd/cc/td/...1101/cable.htm
You have a DB 9 on the back of you PC.

I used EFIlive 4:
http://68.178.219.18/software/EFILiveV465_305_Eval.exe


Have fun

Mike


aldlfinal3.zip

aldlfinal3_brd.pdf

[michaelw]

Originally Posted by Mike:)

Option 1 on the car side use Ground Data and 12v // on the PC side use pins 2, 3, and 5

Option 2 ointhe car side use ground and Data/// use a 9V battery on the power in pins /// use pins 2,3,and 5 on the PC side.

If you join the DTR and RTS lines together to power your circuit you run the risk of cooking your serial port. Route the power through a diode for each line. (see circuit on first post).

If you want to power it off the car (no real need unless you have a cheap laptop, cheap usb/serial converter or want to use a pda) you can source 12V from pin 16 on the obd plug. No need for a 9V batery, the battery/cig lighter power option is needed on US cars that have a different OBD I plug.

Mike

[Mike:)]

Hi there,

Yes there are diodes to protect DTR and RTS. I am using the same basic circuit as you.

Just have a few power options. - it works from a pda which is cool!

There is a PDF to make a pcb from. Thought it might help a few people.

Mike

[michaelw]

Added some info about the airbag flashing when you use an adaptor on the VX (and the VY I guess)

Mike

[JcB]

Hello Mike, i'm still debating on buying an ALDL cable for my VS from you. I'm looking at the above diagram, it's different from the www.techedge.com.au one. Could you tell me what models this would work for. Many thanks.

[14secvp]

just been reading what the honda boys have been doing with a nokia cellphone data cable (come as serial or usb) using it for logging seems to have a max 232 chip in it.looks like the same circuit as some of the max 232 interfaces costs about 25 bucks just cut off the cellphone plug on the end bare the wires and viola .maybe i might of been missing something but have a look schematics for the cable on the net nokia dku 5 or nokia dku 2 or check out www.pgmfi.org let us know what u find out sure beats making one

heres the schematics they are a bit different but with some modifications might work