OBD2 (On-Board Diagnostics Generation 2)

**KBR** · December 23rd, 2007 04:44 AM

Originally Posted by sonjeffrey

Tech1 was the first scan tool used by GM. Then came the Tech2. These are scan tools or diagnostic tools where you can connect to your vehicle's DLC (data Link Connector) for you to connect and communicate with your vehicle's different modules, such as below:
1. ECM - Engine Control Module
2. TCM - Transmission Control Moule
3. PCM - Powertrain Control Module - combination of Engine and Transmission
4. BCM - Body Control Module
5. EBCM - Electronic Brake control Module
6. EBTCM - Electronic Brake And Traction Control Module
7. SDM - Sensing and Diagnostics Modules
and so on... as of now... average of 24 modules meron ang mga GM Vehicles..
And of course pati na rin yung ibang mga Car Makers..
Dahil nga, ginagawang standard na yan ng SAE..
Different car manufacturers uses different designs of scan tool..
Im not sure pero sa toyota yata, intelligent tester yung tawag sa scan tool nila...

Sir, iisa lang ang DLC para sa lahat ng mga OBD-II equipped vehicles. wether if its a American, Japanese or European car from 1997-present. also, you can use one OBD-II scanner for all vehicles, like those Snap-On MODIS, Scan Check.. etc.

aite, peace.

**sonjeffrey** · December 23rd, 2007 01:25 PM

Yes. But different manufacturers designed their own scan tools for certain purposes...such as programming the modules, taking snapshots, etc....

**karlbo** · December 23rd, 2007 02:10 PM

uy.. Thanks thanks.. ayus ito... copy ko sir ha.. save ko pala..

**sonjeffrey** · December 23rd, 2007 02:46 PM

No prob sir... sana makakatulong sa inyo..

God Bless!!!

**mazingerZ** · December 26th, 2007 12:52 PM

madownload nga hehehe. Thanks sir jeff. My friend has an OBDII scanner hope this would enlighten us. .

**Langabe** · December 26th, 2007 03:37 PM

sir ako meron ako nabili na OBDII meron din siya sofware na pang read ng codes type mo lang yun code lalabas na yun meaning.

**sonjeffrey** · December 27th, 2007 07:59 PM

Ayos yun...

Important sa diagnostics, ay kailangan alam mo yung system description...tapos may schematic diagram ka at connector end views...
Important din na alam mo ang OHM's Law... and when diagnosing electronic parts, always check for Voltage drop... di na uso ang test light... Isa pang magandang weapon is yung Fluke Multimeter... Maganda yun lalo na sa intermittent problems, peak min/max, duty cylcle...
Standard naman yung OBD2 sa lahat... kaya kahit anong make.. yung principle ganun pa din...

God Bless!

**t2erns** · December 27th, 2007 11:28 PM

mag add lang po ako regarding obd2 and generic scanner or code reader, although the dlc is standard sa lahat ng obd2 compliant vehicles possible din na hindi ma access ng isang scanner or reader since ang mga manufacturer ay free sa communication system na gamit nila kaya hindi lahat ng obd2 kayang basahin ng scanner or reader.unlike sa 2008 model (na imamarket sa us) common na ang communication protocol which is CAN

**baludoy** · December 28th, 2007 12:14 AM

may bentang reader sa ebay. don't just know though if it can read all makes of obd2

**sonjeffrey** · December 29th, 2007 07:28 PM

Yup... depende kasi sa communication line na gamit ng car makers...
Some uses UART, meron din Class 2 Serial Data.... Meron din na combination of both... Then yung mga latest ngayon is yung LAN... For the scan tool to communicate with the modules on the vehicle which understands UART, Class 2 serial data or Lan.. They need a gateway to translate the messages... Here comes CANdi...
Once, sa training.. i asked the instructor kung bakit di na lang gawing WIRELESS yung communication between modules.... para ma-eliminate na yung wiring problem, like short to voltage, short to ground or open circuit...
He just smiled at me and said, il reply that later... Up to now, wala pang reply...
What do you think???? Mas ok kaya pag Wireless LAN???

God Bless!