The CarPC / Carputer Thread

monty9991 · 27th October 2008, 13:42

Quote:

Originally Posted by gigy

I have painted it all matt black including the trim around the speedometer gauges. now car has gone back to stock colour.

might be looking kool. pics plz

gigy · 27th October 2008, 23:17

the picture of all blacked out

shldn · 28th October 2008, 11:04

looks good gigy. can you take a night shot ( without the flash ) with the dashboard lights turned on.

and what's the red button on the steering for ?

gigy · 31st October 2008, 23:25

shldn,
red button is additional horn switch. night pictures.

monty9991 · 3rd November 2008, 14:18

looks neat setup. now its turn for engine diagnose setup.

spadival · 3rd November 2008, 14:50

Fab fabrication and the matte black console looks good!!

Quote:

Originally Posted by monty9991

looks neat setup. now its turn for engine diagnose setup.

Just 2 days back, I was able to communicate with the Baleno ECU using a terminal program that sends and receives data over com port to the ECU via an ALDL USB to Serial cable at 7812 baud.

Been trying it for months now without any success. It now seems the baud rate was the culprit. Now I have less than a month before I sell the car :(.

Of course, All the pain staking work of decoding the Suzuki ECU protocol was done by Rhinoman. You can see all the details on his website http://www.btinternet.com/~j_holland/pages/diag.html and on redlinegti.com • View topic - Baleno OEM ECU

Gigy, Its probably worthwhile for you to hook up your Baleno ECU to the CarPC. Since you are into DIY, its pretty easy to fabricate a DIY ALDL cable. There are instructions available online for doing it.

monty9991 · 6th November 2008, 08:55

can alto's ECU also hooked up with the carpc?

spadival · 6th November 2008, 10:59

Quote:

Originally Posted by monty9991

can alto's ECU also hooked up with the carpc?

You will have to find whats the ECU on your car? The ECU is probably located behind the glove box. Also, find out where is the diag port. From the pin configuration on the diag port, you can find out whether the ECU is OBD I or OBD II compliant.

monty9991 · 6th November 2008, 13:18

i will check about what ECU is in there. but i knwo its OBD II connector with 3 wires in it. one +ve other -ve and 3rd one probably for communication.
but i think even the maruti guys dont have any scanner to the maruti cars, not sure.

spadival · 6th November 2008, 16:17

3 wires means its sure shot OBD1.5 - i.e. OBD I protocol with a physical 12 pin OBDII connector.

I would expect the ECU to be a Denso make. If so, then the protocol should be similar to the one for Baleno as most pre-OBDII Suzuki ECU's in different Suzuki vehicles seem to have the same protocol.

Scanner is available with most Maruti dealers - Its called Tech II and cost is supposed to be in the region of Rs 1.5 lakhs ONLY

. If you can get a friendly neighbourhood Maruti dealer to hook up the TechII and find out the tx/rx data stream, nothing like it

monty9991 · 7th November 2008, 12:20

Quote:

Originally Posted by spadival

find out the tx/rx data stream, nothing like it

whats about that? i might be able to get some info on it as my friend has maruti authorised service center.

spadival · 7th November 2008, 12:43

First, you have to find the baud rate at which transmission takes place for the particular ECU. So far, its been found that Suzuki ECU's transmission rate thru the serial diagnostic link is either 7812 baud (Suzuki Baleno,Escudo) or 15625 baud (Suzuki Jimney).

Just read thru the links I have posted earlier. You will get a fair understanding of whats going on. Since the protocol is not published, If there is a way to spy on what data gets exchanged between the Tech II and the ECU, we get a better understanding of the protocol - i.e. what bytes of data are transmitted from Tech II and what are the response bytes from the ECU. This is the easier way of finding out the protocol. The really hard way is by decoding the binary/assembly program stored on the ECU ROM itself, like the way rhinoman is doing it!!

monty9991 · 7th November 2008, 15:24

Quote:

Originally Posted by spadival

First, you have to find the baud rate ..................!!

pheewwwww, it looks kind of hard. anyways ill go thru the links and see where i stand.

spadival · 7th November 2008, 15:43

It helps if you have some Computer/electronics background and haven't forgotten the stuff we learn in Engg college.

Baud is a bit like your broadband speeds - kbps/mbps. Basically tells you how fast is the ECU receiving/transmitting data on the diagnostic line. If you send data at the wrong baud rate, the ECU simply doesnt respond.

monty9991 · 7th November 2008, 22:38

Quote:

Originally Posted by spadival

It helps if you have some Computer/electronics background and haven't forgotten the stuff we learn in Engg college.

Baud is a bit like your broadband speeds - kbps/mbps. Basically tells you how fast is the ECU receiving/transmitting data on the diagnostic line. If you send data at the wrong baud rate, the ECU simply doesnt respond.

thanks for the info on Baud. well i am little good at computers but not that good in electronics. and i never went to Engg College. lol

27th October 2008, 23:17	#212
gigy Senior - BHPian Join Date: Jul 2006 Location: mumbai Posts: 1,321 Thanked: 47 Times	the picture of all blacked out Attached Thumbnails
	() Thanks

28th October 2008, 11:04	#213
shldn BHPian Join Date: Dec 2005 Location: Mumbai Posts: 94 Thanked: 0 Times	looks good gigy. can you take a night shot ( without the flash ) with the dashboard lights turned on. and what's the red button on the steering for ?
	() Thanks

31st October 2008, 23:25	#214
gigy Senior - BHPian Join Date: Jul 2006 Location: mumbai Posts: 1,321 Thanked: 47 Times	shldn, red button is additional horn switch. night pictures. Attached Thumbnails
	() Thanks

3rd November 2008, 14:18	#215
monty9991 BANNED Join Date: Oct 2007 Location: Ludhiana Posts: 706 Thanked: 42 Times View My Garage	looks neat setup. now its turn for engine diagnose setup.
	() Thanks

6th November 2008, 08:55	#217
monty9991 BANNED Join Date: Oct 2007 Location: Ludhiana Posts: 706 Thanked: 42 Times View My Garage	can alto's ECU also hooked up with the carpc?
	() Thanks

6th November 2008, 13:18	#219
monty9991 BANNED Join Date: Oct 2007 Location: Ludhiana Posts: 706 Thanked: 42 Times View My Garage	i will check about what ECU is in there. but i knwo its OBD II connector with 3 wires in it. one +ve other -ve and 3rd one probably for communication. but i think even the maruti guys dont have any scanner to the maruti cars, not sure.
	() Thanks

6th November 2008, 16:17	#220
spadival Senior - BHPian Join Date: Oct 2004 Location: Melbourne, AU Posts: 1,773 Thanked: 26 Times View My Garage	3 wires means its sure shot OBD1.5 - i.e. OBD I protocol with a physical 12 pin OBDII connector. I would expect the ECU to be a Denso make. If so, then the protocol should be similar to the one for Baleno as most pre-OBDII Suzuki ECU's in different Suzuki vehicles seem to have the same protocol. Scanner is available with most Maruti dealers - Its called Tech II and cost is supposed to be in the region of Rs 1.5 lakhs ONLY . If you can get a friendly neighbourhood Maruti dealer to hook up the TechII and find out the tx/rx data stream, nothing like it
	() Thanks

7th November 2008, 12:43	#222
spadival Senior - BHPian Join Date: Oct 2004 Location: Melbourne, AU Posts: 1,773 Thanked: 26 Times View My Garage	First, you have to find the baud rate at which transmission takes place for the particular ECU. So far, its been found that Suzuki ECU's transmission rate thru the serial diagnostic link is either 7812 baud (Suzuki Baleno,Escudo) or 15625 baud (Suzuki Jimney). Just read thru the links I have posted earlier. You will get a fair understanding of whats going on. Since the protocol is not published, If there is a way to spy on what data gets exchanged between the Tech II and the ECU, we get a better understanding of the protocol - i.e. what bytes of data are transmitted from Tech II and what are the response bytes from the ECU. This is the easier way of finding out the protocol. The really hard way is by decoding the binary/assembly program stored on the ECU ROM itself, like the way rhinoman is doing it!! Last edited by spadival : 7th November 2008 at 12:52.
	() Thanks

7th November 2008, 15:43	#224
spadival Senior - BHPian Join Date: Oct 2004 Location: Melbourne, AU Posts: 1,773 Thanked: 26 Times View My Garage	It helps if you have some Computer/electronics background and haven't forgotten the stuff we learn in Engg college. Baud is a bit like your broadband speeds - kbps/mbps. Basically tells you how fast is the ECU receiving/transmitting data on the diagnostic line. If you send data at the wrong baud rate, the ECU simply doesnt respond.
	() Thanks