What Is Obd Scan Tool Presentation Mp3 Car Afk Fest 2009

What is “OBD”, What is “OBD”, anyway?anyway?

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© 2009 ScanTool.net, LLC. 2On-Board Diagnostics (OBD)

OBD OverviewOBD stands for “On-Board Diagnostics.”Computer-based system designed to control emissionsProvides early warning through MIL (Malfunction Indicator Light).


OBD Overview

OBD system


History of OBDFirst introduced in 1981 by GMBecame requirement in CA in 1988Shortcomings of OBD-I

Only a few parameters are monitoredVague standards resulted in many different implementations (ALDL, GMLAN, several versions of ISO9141, etc.) Communication protocol information is proprietary


History of OBDOBD-II: OBD, second generationIntroduced in 1994Required on all MY1996+ vehiclesMore sophisticated – monitors many different engine parametersStandards are available from SAE and ISOAccepted spellings: OBDII, OBD-II, OBD-2Often misspelled as “ODB” (yuk!)


History of OBDOBD timeline (United States)

1981 1996

OBD-I

OBD-II

1994


OBD-IIOBD-II Compliance (US only)

All 1996+ cars and light trucks (<8,500 lbs)All 2004+ medium duty vehicles (<14,000 lbs)Some 1994 and 1995 models with this sticker:


OBD-IIOBD-II Compliance outside the USA

A growing number of countries have adopted OBD legislation (JOBD, EOBD, etc)Varies greatly from country to countryLags behind the USGenerally more complicated than US legislation


OBD-IIJust five protocols are allowed:

SAE J1850 VPW (GM) SAE J1850 PWM (Ford) ISO9141-2 (imports, Chrysler)ISO14230-4 (Keyword Protocol 2000, 1998+) ISO15765-4 (CAN, introduced in 2004)

Starting with MY2008, all vehicles sold in the US are required to be equipped with ISO15765-4 (CAN)


OBD-IIWhy CAN?

Flexible, proven protocolExcellent noise immunityFast!

CAN

VPW, ISO, KWP

PWM

CAN

10 kbps

41 kbps

500 kbps


OBD-IIOBD protocols timeline

1994 2008

J1850 VPW

1998

ISO9141-2J1850 PWM

KWP2000CAN

2004 2010+


OBD-IIIOBD-2 plus wireless; information wirelessly uploaded to DMV serversCan be done over cellular/satellite, DSRC, Bluetooth, WiFi (still being defined)Benefits:

Reduces emissions/catches problems earlySaves time and money

Drawbacks:Privacy concernsUpfront cost


OBD-IIIIs it a good idea?Doesn’t matter – it is already happening.FCC allocated 75 Mhz in the 5.9 Ghz band for vehicle communicationsGM’s OnStar system can be programmed to report OBD I/M data


OBD-IIIImplementation underway in the following states:

California (Continuous Testing Program)Nevada (pilot program, 110 vehicles)Oregon (5000 units, 2 of 15 antennas set up)Wisconsin (pilot program)Illinois (pilot program)Utah (proof of concept testing)


OBD ApplicationsDiagnosticsRepair verification

Photo courtesy ASE


OBD ApplicationsPerformance tuning


OBD ApplicationsDigital dashboards


OBD ApplicationsFleet Management System

Access diagnostic info & real-time statistics:• Engine idle time• Miles traveled• Max RPM• Trouble codes• Etc

Diagnostic connector can beused to provide power toon-board computer


OBD ApplicationsSanctioned product plug

microOBD• “OBD in a can”• Tiny: 25x50 mm (1x2 in)• 0.1” single row header• Supports all OBD protocols• Can interface directly with

host micro• ELM327 compatible command set• Firmware upgradeable via bootloader


Data loggingRecord engine parameters for later playbackCapture intermittent events

OBD Applications


Pass-Thru Programming (SAE J2534)

OBD Applications

Internet connection(DSL, cable, dialup, etc)

OBD cablePC connection

Serial, USB, WiFi,Bluetooth

Internet connectionDSL, Cable, dialup…

Auto Manufacturers


ECU HackingPacket sniffingReflashingRemote control

OBD Applications


OBD scan toolDevice used to retrieve information from the on-board diagnostic system

Types of scan toolsStand alonePC based

Getting at the Data


Stand-alone scan toolsAdvantages:

• Do not require a PCDisadvantages:

• Minimalistic interface• Fixed software• Higher end units

very expensive

Getting at the Data


Getting at the DataPC-based scan tools

Advantages:• Harnesses the power and economy of

scale of modern PCs • Large, easy-to-read screen• Unlimited storage for data logging


PC-based scan toolsAdvantages (continued):

• Wide selection of diagnostic software that can be easily updated

• Remote data acquisition• Fraction of the cost of comparable

stand-alone scan tools

Getting at the Data


–

Which scan tool is right for me?–

Depends on intended use

Code scanning: cheap code readerCasual user/do it yourself mechanic: PC-based scan tool with basic (free/inexpensive) software Professional mechanic: high-end stand-alone scan tool ($$$) or a PC-based scan tool with enhanced diagnostic software (less $)CarPC enthusiast: PC-based scan tool (USB or Bluetooth)

Getting at the Data


–

What should I look for in a scan tool?–

Questions to ask:

Is it compatible with my vehicle?What software is available?Which parameters are supported? (Modes 1 thru A are generic OBD) Does it support manufacturer-specific parameters?Is the software/hardware upgradeable?What connection options are available?

Getting at the Data


OBD-IIIIntegration of OBD with inter-vehicle communication services

Emergency warning systemCollision avoidanceCooperative daptive cruise controletc

The Future


Wireless firmware updates

The Future

“Ejection seat bugfix is available. Install update (Y/N)?”


DTCSearch.com – search engine for diagnostic trouble codes.

http://www.dtcsearch.com

International Standards Organizationhttp://www.iso.org

MP3Car.comhttp://www.mp3car.com

ScanTool.net, LLC websitehttp://www.scantool.net

Society of Automotive Engineershttp://www.sae.org

Resources

http://www.dtcsearch.com/

http://www.iso.org/

http://www.mp3car.com/

http://www.scantool.net/

http://www.sae.org/


ReferencesCalifornia Air Resource Board’s OBD Programhttp://www.arb.ca.gov/msprog/obdprog/obdprog.htm

Environmental Protection Agency: OBD homehttp://www.epa.gov/otaq/regs/im/obd/index.htm

Equipment and Tool Institutewww.etools.org

National Automotive Service Task Forcewww.nastf.org

National OBD Clearinghousewww.OBDclearinghouse.com

http://www.arb.ca.gov/msprog/obdprog/obdprog.htm

http://www.epa.gov/otaq/regs/im/obd/index.htm

http://www.etools.org/

http://www.nastf.org/

http://www.obdclearinghouse.com/


Contact

Vitaliy MaksimovScanTool.net, LLC

[email protected] or [email protected]

mailto:[email protected]

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What Is Obd Scan Tool Presentation Mp3 Car Afk Fest 2009

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