what is obd scan tool presentation mp3 car afk fest 2009
DESCRIPTION
Presentation on Past, Present and Future of OBD Technology.TRANSCRIPT
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).
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OBD Overview
OBD system
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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
© 2009 ScanTool.net, LLC. 5On-Board Diagnostics (OBD)
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!)
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History of OBDOBD timeline (United States)
1981 1996
OBD-I
OBD-II
1994
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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:
© 2009 ScanTool.net, LLC. 8On-Board Diagnostics (OBD)
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
© 2009 ScanTool.net, LLC. 9On-Board Diagnostics (OBD)
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)
© 2009 ScanTool.net, LLC. 10On-Board Diagnostics (OBD)
OBD-IIWhy CAN?
Flexible, proven protocolExcellent noise immunityFast!
CAN
VPW, ISO, KWP
PWM
CAN
10 kbps
41 kbps
500 kbps
© 2009 ScanTool.net, LLC. 11On-Board Diagnostics (OBD)
OBD-IIOBD protocols timeline
1994 2008
J1850 VPW
1998
ISO9141-2J1850 PWM
KWP2000CAN
2004 2010+
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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
© 2009 ScanTool.net, LLC. 13On-Board Diagnostics (OBD)
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
© 2009 ScanTool.net, LLC. 14On-Board Diagnostics (OBD)
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)
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OBD ApplicationsDiagnosticsRepair verification
Photo courtesy ASE
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OBD ApplicationsPerformance tuning
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OBD ApplicationsDigital dashboards
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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
© 2009 ScanTool.net, LLC. 19On-Board Diagnostics (OBD)
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
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Data loggingRecord engine parameters for later playbackCapture intermittent events
OBD Applications
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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
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ECU HackingPacket sniffingReflashingRemote control
OBD Applications
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OBD scan toolDevice used to retrieve information from the on-board diagnostic system
Types of scan toolsStand alonePC based
Getting at the Data
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Stand-alone scan toolsAdvantages:
• Do not require a PCDisadvantages:
• Minimalistic interface• Fixed software• Higher end units
very expensive
Getting at the Data
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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
© 2009 ScanTool.net, LLC. 26On-Board Diagnostics (OBD)
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
© 2009 ScanTool.net, LLC. 27On-Board Diagnostics (OBD)
–
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
© 2009 ScanTool.net, LLC. 28On-Board Diagnostics (OBD)
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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
© 2009 ScanTool.net, LLC. 29On-Board Diagnostics (OBD)
OBD-IIIIntegration of OBD with inter-vehicle communication services
Emergency warning systemCollision avoidanceCooperative daptive cruise controletc
The Future
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Wireless firmware updates
The Future
“Ejection seat bugfix is available. Install update (Y/N)?”
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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
© 2009 ScanTool.net, LLC. 32On-Board Diagnostics (OBD)
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
© 2009 ScanTool.net, LLC. 33On-Board Diagnostics (OBD)
Contact
Vitaliy MaksimovScanTool.net, LLC