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Old 28th May 2011, 23:54   #256
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Default re: OBD (On-board diagnostics) for Indian Cars

I got the ELM 327 from dealextreme.com.

Tested it with Android Torque and it's working.
I will do a full test and provide the parameters which are available and readable.

Costed USD 26.04 and took 2 weeks to get it.

Thanks to "mtnrajdeep"
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Old 29th May 2011, 12:33   #257
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^^ Which car - Swift? Which year make?
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Old 29th May 2011, 14:06   #258
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Archat, as far as my googlemata research has shown, the DX units which have cloned ELM327s, work like a charm on petrol, diesel cars have some problems working with them.
dont know how, or why, just something i read repetitively.
PS: i did get one from DX only, no problems connecting or using it.
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Old 29th May 2011, 15:16   #259
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^^ Maruti uses a non-standard OBD protocol. So, what will work like a charm in your Ford will not work in a Maruti :( .
As a matter of fact Scangauge, Ultragauge etc which works very good in other cars, does not work in older Marutis. I've heard the SGII works in a 2009 Ritz petrol or newer models.
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Old 29th May 2011, 18:52   #260
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Quote:
Originally Posted by archat68 View Post
^^ Which car - Swift? Which year make?
It's Suzuki Ritz Diesel 2009 (VDI)
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Old 30th May 2011, 17:51   #261
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Okay Guys ! here's a tricky one ( and a desperate query as well) - I have a MPFI contessa 2003 model. The kits is a bosch design. ANYONE having any ides about this being BD compliant and what sort of S/W & H/W will work on this. The car is out of production and bangalore dosen't seem to have any *** for the HM cars ( their website doesn't have any listed !!)
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Old 30th May 2011, 18:35   #262
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Default re: OBD (On-board diagnostics) for Indian Cars

Quote:
Originally Posted by Tej Khokhar View Post
... I have a MPFI contessa 2003 model. The kits is a bosch design....
AFAIK, ELM 327 devices support Bosch ECU's. Do check if possible, before you go for the plunge.
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Old 30th May 2011, 20:21   #263
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Quote:
Originally Posted by dhanushs View Post
AFAIK, ELM 327 devices support Bosch ECU's. Do check if possible, before you go for the plunge.
Thanks Dhanush, However i am a bit inexperienced in how to go about finding one in bangalore. But i need one to check what's causing jerky acceleration (idle to load switching) on my car. could you guide my how to go about it or if you know of someone who conducts these diagnostics for MPFI cars.

Would appreciate it .
Thanks
Tej
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Old 30th May 2011, 21:11   #264
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Default re: OBD (On-board diagnostics) for Indian Cars

Quote:
Originally Posted by Tej Khokhar View Post
Thanks Dhanush, However i am a bit inexperienced in how to go about finding one in bangalore. But i need one to check what's causing jerky acceleration (idle to load switching) on my car. could you guide my how to go about it or if you know of someone who conducts these diagnostics for MPFI cars.

Would appreciate it .
Thanks
Tej
why dont you connect with people in bangalore?
its hardly a 2 minute thing to diagnose.....
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Old 30th May 2011, 22:14   #265
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I got my hand on a Maruti Swift Diesel service manual. In the OBD protocol they use the K line (ISO 9141) to communicate with the OBDII scanners (ECM). The pin 7 of the OBDII connector is used for this.
But Maruti also uses CAN protocol for communicating with the ECM and BCM (body electrical control module). The pin no. 14 (CAN low) and pin 6 (CAN high) in the OBDII connector is present to diagnose any problem with the BCM.

IMO when we connect the scanners and tools like ScangaugeII, the presence of output for both ISO 9141 and CAN confuses the scanner tool which then fails to connect.

If somebody has the SGII with him and access to a Swift he can check two things:
i) selecting the ISO 9141 protocol and then attaching the SGII
if it fails
ii) inserting thick wires to the pin no 4,5,7 and 16 of the OBD connector and connecting the other ends to the respective pins of SGII connector and selecting the ISO 9141 protocol.

I think the 2nd method should work.

I'm getting an itch to test it - but don't have the SGII at my disposal. So, members with SGII can check and post the result here (provided they have access to a Swift).

Quote:
Originally Posted by mtnrajdeep View Post
I tried with Swift D and Ritz D using an ELM327 bluetooth adapter and an android device and the torque app. It worked on the Ritz D but not on the Swift D. I also tried on A-Star and SX4 ZXi without success.
If you have the ELM327 and access to a Swift D - can you please check the procedure I described in the above post and post the result here?

Last edited by archat68 : 30th May 2011 at 22:20.
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Old 30th May 2011, 22:19   #266
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Old 30th May 2011, 22:22   #267
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Default re: OBD (On-board diagnostics) for Indian Cars

Quote:
Originally Posted by archat68 View Post
I got my hand on a Maruti Swift Diesel service manual. In the OBD protocol they use the K line (ISO 9141) to communicate with the OBDII scanners (ECM). The pin 7 of the OBDII connector is used for this.
But Maruti also uses CAN protocol for communicating with the ECM and BCM (body electrical control module). The pin no. 14 (CAN low) and pin 6 (CAN high) in the OBDII connector is present to diagnose any problem with the BCM.
Thanks for the info! What ECU does the DDIS have? Is it from Bosch or Magneti Marelli? If the scanner is ELM based, it can be initialized to use only a particular protocol. The software need to be capable of it. By default, it transparently selects the protocol by trying each one sequentially. I believe CAN is selected if it is detected first.

regards,
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Old 30th May 2011, 22:27   #268
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^^Thats the problem the CAN protocol is not used to communicate with the ECM and scanner. It is for the internal communication between ECM and BCM.

We need to force it to select ISO9141 or use a custom connection eliminating the CAN pins 6 and 14.
The ECM make is not mentioned in the service manual - I'll open the ECM and check (I learnt the way to remove the ECM )

Last edited by archat68 : 30th May 2011 at 22:29.
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Old 30th May 2011, 22:38   #269
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Default re: OBD (On-board diagnostics) for Indian Cars

Here are the pages from the service manual:
Attached Thumbnails
OBD (On-board diagnostics) for Indian Cars-20110530-22.30.54.jpg  

OBD (On-board diagnostics) for Indian Cars-20110530-22.31.32.jpg  

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Old 31st May 2011, 09:13   #270
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Default re: OBD (On-board diagnostics) for Indian Cars

Quote:
Originally Posted by archat68 View Post
If you have the ELM327 and access to a Swift D - can you please check the procedure I described in the above post and post the result here?
Thanks archat. I will try to check this.

Quote:
Originally Posted by bejoy View Post
Thanks for the info! What ECU does the DDIS have? Is it from Bosch or Magneti Marelli?
When I took delivery of the swift in 2008, I noticed stickers on the ECU mentioning Magnetti Marelli. Since it is a FIAT developed engine, only FIAT's component suppliers should be supplying the parts, I guess.
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