VW Golf Mk4 GTI Turbo

**dooby_meu** · 04-13-2010, 04:23 AM

Hello there.
I have a 20001 VW Golf Mk4 GTI Turbo with ISO9141-2 ecu protocol and i am wondering if there is a way of comunicating with my car ecu faster like CAN protocol.... can the protocol be changed from ISO9141-2 witch is slow to something faster...... all help is apreciated

**p2psmurf** · 04-13-2010, 05:21 AM

In theory the protocol could be changed to Can, BUT that would involve a lot of programming on the software of the engine ecu. You would have to rewrite all of the diagnostic software which is part of it. In practice the answer is no.
For diagnostic purposes only you could use VCDS, which is a little bit faster than EOBD/OBD2 as long as you only request 1 measurement block (with 4 values).
You can speed up the EOBD/OBD2 communication by limiting the number of pids you request.

**dooby_meu** · 04-13-2010, 10:49 AM

I have a carpc installed im the car and i want to use dashcommand v2 embeded in centrafuse. But just running the demo version and witch has only the rev pid acive and the responce is still laggy. could it be that im using the elm 327 v 1.0 and not the more up to date version.

Allso has anyone experienced Kiwi Wifi plus iphone or ipod revo software in this car or simmulor car with the same ISO protocal as mine.....

**Vitaliy** · 04-13-2010, 02:06 PM

Originally Posted by dooby_meu

Hello there.
I have a 20001 VW Golf Mk4 GTI Turbo with ISO9141-2 ecu protocol and i am wondering if there is a way of comunicating with my car ecu faster like CAN protocol.... can the protocol be changed from ISO9141-2 witch is slow to something faster...... all help is apreciated

It sounds like you've got a cargo version of the Time Machine: it not only allows you to travel through time, but lets you bring cars all the way back from the 21st millenium!

What kind of refresh rate do you need? OBDLink can give you well in excess of 8 samples per second (provided your ECU can talk that fast).

Vitaliy

**dooby_meu** · 04-14-2010, 02:54 AM

I diden't just buy the elm 327 v1.0. I've had this for a long time. i will buy a more up to date version just not shore wether is worth buying the OBDLINK or any other's. will i notice a big diference to justify the cost of buying any other hardware.

**malcom2073** · 04-14-2010, 07:12 AM

dooby_meu: My vehicle is ISO-9141-2 (The slowest protocol of them all) and I've gotten the highest speed from the OBDLink out of three different tools that I've tried. I think the fastest I got with the OBDLink was around 150ms inbetween samples which is near 13 samples per second! The second fastest was 200ms per sample so it was a huge improvement.

Keep in mind, this was with one set of software, no other software was quite that fast with any tool, but overall the OBDLink was generally quicker to get responses. I also can't speak to the iPhone app Rev, since I've never used it.

I can't guarantee the same results with your vehicle, but just sharing my ISO-9141-2 experience with you.

Edit: surfntomm was right, my math fails. I was getting 150ms which is 6.67 samples per second with the OBDLink, and once I set it to ignore all but one ecu response I got it down to 75ms which is where the 13 samples per second number came from, but for standard request/responses 6.67 is more accurate.

**surfntomm** · 04-14-2010, 05:45 PM

how is that 13 samples/s with 150 ms period. am i missing something or is it just 1s = 1000ms/150ms = 6.67 samples per second.

**dooby_meu** · 04-15-2010, 06:44 AM

I've Had my car from new and i love it. After 9 years it still puts a big smile in my face.
I do look after my car realy well and will keep it till it dies. I hope that it lasts many more years. I have a thew projects in mind but my main problem is my car ecu protocol not having fast comunication rate. this is so disapointing me and i cant get it out of my head that the car has the slowest ISO Protocol and theres no way around it... There must be a solution some how. please help!!!!!!!

**dooby_meu** · 04-20-2010, 06:36 AM

Has anyone here ever changed their car ecu protocol... example ISO9141-2 To CAN....
Does it involve only programming on the software of the engine ecu or do i need to rewire the car obd2 port...
Someone must of tried this before.....

**lez** · 05-02-2010, 05:57 AM

just bought a cheap cable (well a friend has but he's not a carpc buff) and it said to use with vagcom ?

whats that wheres it from?

what can i use with the cable?