Go Back   Team-BHP > Under the Hood > Technical Stuff


Reply
 
Thread Tools Search this Thread
Old 22nd October 2016, 11:05   #31
BHPian
 
devrajman's Avatar
 
Join Date: Mar 2009
Location: Bangalore
Posts: 497
Thanked: 110 Times
Default Re: On Board Diagnostics (OBD) for Dummies

Quote:
Originally Posted by Surojit View Post
Hi,

I need an urgent information. For all of BS4 compliant TATA and ALeyland trucks, what are the OBD2 port pinout configurations? What are the manufacturer specific PID's which can be retrieved?



Many thanks in advance
*** Surojit M
These are OBDII, however they are 24V (please confirm using multimeter)
Will work on EOBD 24V scanners. However there will always be few PIDs and few DTC which can be seen only on service tool than open source OBDII.
devrajman is offline   (1) Thanks Reply With Quote
Old 23rd October 2016, 00:02   #32
Newbie
 
Join Date: Oct 2015
Location: Kolkata
Posts: 3
Thanked: 0 Times
Default Re: On Board Diagnostics (OBD) for Dummies

Quote:
Originally Posted by devrajman View Post
These are OBDII, however they are 24V (please confirm using multimeter)
Will work on EOBD 24V scanners. However there will always be few PIDs and few DTC which can be seen only on service tool than open source OBDII.
Thanks Dev. If we can get some specific PID's which are assigned by manufacturers, it would be nice. Are we saying that these are never available publicly?
Surojit is offline   Reply With Quote
Old 23rd October 2016, 20:33   #33
BHPian
 
devrajman's Avatar
 
Join Date: Mar 2009
Location: Bangalore
Posts: 497
Thanked: 110 Times
Default Re: On Board Diagnostics (OBD) for Dummies

Quote:
Originally Posted by Surojit View Post
Thanks Dev. If we can get some specific PID's which are assigned by manufacturers, it would be nice. Are we saying that these are never available publicly?
80%+ is available in public domain, the rest professionals do reverse engg to find it out, this is just seeing live PIDs and DTCs.

However there is 2-way commands like Activation Test, Programming, etc are more complex to reverse engg
devrajman is offline   (1) Thanks Reply With Quote
Old 23rd October 2016, 21:08   #34
Newbie
 
Join Date: Oct 2015
Location: Kolkata
Posts: 3
Thanked: 0 Times
Default Re: On Board Diagnostics (OBD) for Dummies

Great / thanks indeed Dev. I am presuming that for TATA which has Cummins BS IV engines, the pinout is for the 9PIN round diagnostic connector. This is translated to a 16pin connector and communication to is via the CAN bus and scanning is still via LM 327 IC. Please correct if the understanding is wrong. Many thanks again...
Surojit is offline   Reply With Quote
Old 23rd October 2016, 22:37   #35
BHPian
 
devrajman's Avatar
 
Join Date: Mar 2009
Location: Bangalore
Posts: 497
Thanked: 110 Times
Default Re: On Board Diagnostics (OBD) for Dummies

Quote:
Originally Posted by Surojit View Post
Great / thanks indeed Dev. I am presuming that for TATA which has Cummins BS IV engines, the pinout is for the 9PIN round diagnostic connector. This is translated to a 16pin connector and communication to is via the CAN bus and scanning is still via LM 327 IC. Please correct if the understanding is wrong. Many thanks again...
First Things First, I think its 16pin connector and not 9 pin round.
Best is to personally go and connect to a TATA vehicle of your interest. ELM327 will work for few minutes before its blown off on 24V system!

Using Torque any other app, create a dump of Live PIDs u can see. DTC will be tricky as u need to generate those errors to read.
devrajman is offline   (1) Thanks Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
OBD (On-board diagnostics) for Indian Cars sharathjeppu Technical Stuff 1302 28th November 2016 10:44
TechSpec® : Understanding On-Board Diagnostics, also known as ECU, ECM, EMS dadu Technical Stuff 62 14th March 2014 15:30
Inspiration: Sign Board @ Silk Board. Drive to Tamil Nadu kaushik_ak Travelogues 17 3rd January 2014 20:37
Advantages of OBD 2 over OBD 1 Sprucegoose Technical Stuff 19 20th October 2009 06:44
req help with indigo sx (diesel) on board diagnostics shldn Technical Stuff 4 26th March 2006 20:11


All times are GMT +5.5. The time now is 22:11.

Copyright ©2000 - 2016, Team-BHP.com
Proudly powered by E2E Networks