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What Is Obd Scan Tool Presentation Mp3 Car Afk Fest 2009


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Presentation on Past, Present and Future of OBD Technology.

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What Is Obd Scan Tool Presentation Mp3 Car Afk Fest 2009

  1. 1. What is “OBD”, anyway? Hosted by
  2. 2. OBD Overview OBD stands for “On-Board Diagnostics.” Computer-based system designed to control emissions Provides early warning through MIL (Malfunction Indicator Light). © 2009, LLC. On-Board Diagnostics (OBD) 2
  3. 3. OBD Overview OBD system © 2009, LLC. On-Board Diagnostics (OBD) 3
  4. 4. History of OBD First introduced in 1981 by GM Became requirement in CA in 1988 Shortcomings of OBD-I Only a few parameters are monitored Vague standards resulted in many different implementations (ALDL, GMLAN, several versions of ISO9141, etc.) Communication protocol information is proprietary © 2009, LLC. On-Board Diagnostics (OBD) 4
  5. 5. History of OBD OBD-II: OBD, second generation Introduced in 1994 Required on all MY1996+ vehicles More sophisticated – monitors many different engine parameters Standards are available from SAE and ISO Accepted spellings: OBDII, OBD-II, OBD-2 Often misspelled as “ODB” (yuk!) © 2009, LLC. On-Board Diagnostics (OBD) 5
  6. 6. History of OBD OBD timeline (United States) 1981 1996 OBD-I OBD-II 1994 © 2009, LLC. On-Board Diagnostics (OBD) 6
  7. 7. OBD-II OBD-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, LLC. On-Board Diagnostics (OBD) 7
  8. 8. OBD-II OBD-II Compliance outside the USA A growing number of countries have adopted OBD legislation (JOBD, EOBD, etc) Varies greatly from country to country Lags behind the US Generally more complicated than US legislation © 2009, LLC. On-Board Diagnostics (OBD) 8
  9. 9. OBD-II Just 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, LLC. On-Board Diagnostics (OBD) 9
  10. 10. OBD-II Why CAN? Flexible, proven protocol Excellent noise immunity Fast! VPW, ISO, KWP 10 kbps PWM 41 kbps CAN 500 kbps CAN © 2009, LLC. On-Board Diagnostics (OBD) 10
  11. 11. OBD-II OBD protocols timeline 1994 2008 J1850 VPW J1850 PWM ISO9141-2 KWP2000 CAN 1998 2004 2010+ © 2009, LLC. On-Board Diagnostics (OBD) 11
  12. 12. OBD-III OBD-2 plus wireless; information wirelessly uploaded to DMV servers Can be done over cellular/satellite, DSRC, Bluetooth, WiFi (still being defined) Benefits: Reduces emissions/catches problems early Saves time and money Drawbacks: Privacy concerns Upfront cost © 2009, LLC. On-Board Diagnostics (OBD) 12
  13. 13. OBD-III Is it a good idea? Doesn’t matter – it is already happening. FCC allocated 75 Mhz in the 5.9 Ghz band for vehicle communications GM’s OnStar system can be programmed to report OBD I/M data © 2009, LLC. On-Board Diagnostics (OBD) 13
  14. 14. OBD-III Implementation 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) © 2009, LLC. On-Board Diagnostics (OBD) 14
  15. 15. OBD Applications Diagnostics Repair verification Photo courtesy ASE © 2009, LLC. On-Board Diagnostics (OBD) 15
  16. 16. OBD Applications Performance tuning © 2009, LLC. On-Board Diagnostics (OBD) 16
  17. 17. OBD Applications Digital dashboards © 2009, LLC. On-Board Diagnostics (OBD) 17
  18. 18. OBD Applications Fleet Management System Access diagnostic info & real-time statistics: • Engine idle time • Miles traveled • Max RPM • Trouble codes • Etc Diagnostic connector can be used to provide power to on-board computer © 2009, LLC. On-Board Diagnostics (OBD) 18
  19. 19. OBD Applications Sanctioned 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 © 2009, LLC. On-Board Diagnostics (OBD) 19
  20. 20. OBD Applications Data logging Record engine parameters for later playback Capture intermittent events © 2009, LLC. On-Board Diagnostics (OBD) 20
  21. 21. OBD Applications Pass-Thru Programming (SAE J2534) Auto Manufacturers Internet connection Internet connection DSL, Cable, dialup… (DSL, cable, dialup, etc) OBD cable PC connection Serial, USB, WiFi, Bluetooth © 2009, LLC. On-Board Diagnostics (OBD) 21
  22. 22. OBD Applications ECU Hacking Packet sniffing Reflashing Remote control © 2009, LLC. On-Board Diagnostics (OBD) 22
  23. 23. Getting at the Data OBD scan tool Device used to retrieve information from the on- board diagnostic system Types of scan tools Stand alone PC based © 2009, LLC. On-Board Diagnostics (OBD) 23
  24. 24. Getting at the Data Stand-alone scan tools Advantages: • Do not require a PC Disadvantages: • Minimalistic interface • Fixed software • Higher end units very expensive © 2009, LLC. On-Board Diagnostics (OBD) 24
  25. 25. Getting at the Data PC-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, LLC. On-Board Diagnostics (OBD) 25
  26. 26. Getting at the Data PC-based scan tools Advantages (continued): • Wide selection of diagnostic software that can be easily updated • Remote data acquisition • Fraction of the cost of comparable stand-alone scan tools © 2009, LLC. On-Board Diagnostics (OBD) 26
  27. 27. Getting at the Data – Which scan tool is right for me? – Depends on intended use Code scanning: cheap code reader Casual 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) © 2009, LLC. On-Board Diagnostics (OBD) 27
  28. 28. 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? © 2009, LLC. On-Board Diagnostics (OBD) 28
  29. 29. The Future OBD-III Integration of OBD with inter-vehicle communication services Emergency warning system Collision avoidance Cooperative daptive cruise control etc © 2009, LLC. On-Board Diagnostics (OBD) 29
  30. 30. The Future Wireless firmware updates “Ejection seat bugfix is available. Install update (Y/N)?” © 2009, LLC. On-Board Diagnostics (OBD) 30
  31. 31. Resources – search engine for diagnostic trouble codes. International Standards Organization, LLC website Society of Automotive Engineers © 2009, LLC. On-Board Diagnostics (OBD) 31
  32. 32. References California Air Resource Board’s OBD Program Environmental Protection Agency: OBD home Equipment and Tool Institute National Automotive Service Task Force National OBD Clearinghouse © 2009, LLC. On-Board Diagnostics (OBD) 32
  33. 33. Contact Vitaliy Maksimov, LLC or © 2009, LLC. On-Board Diagnostics (OBD) 33