Autohacking
From HeatSync Labs Wiki
Some resources so far
- mc33290 is an ISO K Line Serial Link Interface, I think has to do with serial interfacing odbii
- ELM seems to make some of the (only?) odb interface chips. They appear to have a software stack they burn onto microchip microcontrollers
- http://www.scantool.net/parts/ has some promising software, and seems to sell ELM products and a breakout board.
Typically, one finds that the manufacturers use the following standards though most manufactures have adopted ISO15765 CAN for 2006 and newer vehicles:
- J1850-PWM (mainly Ford)
- J1850-VPW (Chrysler, GM, Saturn)
- ISO9141/ISO14230 (Acura, Chrysler, Honda, Subaru, Suzuki, Toyota, Volkswagen)
- ISO15765 (most newer vehicles)
Open Source Implementations
- Vehicle Telemetry Platform from the Practical Arduino book is a derivative of the OBDuino32K using the Arduino Mega
- http://code.google.com/p/opengauge/ looks like a great open source resource
- OBDuinoMega
- OBDuino32K
- MPGuino Miles Per Gallon monitor using the Arduino
Commercial Implementations
These links are basically for commercial versions of the obdII interface. Almost all of them give you a connector with free software that can read the basic trouble codes. Some give you the manufacturer specific "extended" or "enhanced" support codes that allow a person to troubleshoot even more components.
Hardware
| Adapter | Form factor | Other features | Cost(at time of writing) | Comments |
|---|---|---|---|---|
| Scantool.net OBDLink | Adapter and cable (adapter can be separated from cable) | Rx/Tx Host<->ECU status lights | $149.90(Special offer), $199.90 Normal | Flash upgradable firmware, Powersave/sleep function, Support forums
Reports of good customer support. This is the best adapter if you want the fastest PID read speed. |
| PLX Devices Kiwi Bluetooth | Adapter and cable (adapter cannot be separated from cable) | On/off switch, link light | $99.99 | Support forums |
| OBDKey | Single moulded unit, smallest adapter | Status/activity LED on side | £103.56 | |
| Adapter from China/via ebay/amazon | Single moulded unit | Rx/Tx Host<->ECU status lights | $20.00 to $60.00 | Many units seem to suffer poor build quality and reliability issues. Some units are perfectly fine. Make sure you purchase with a buyer who has a decent returns policy should the unit turn out to be defective. I would recommend avoiding this adapter, *especially* if you intend to use it on a Ford or other vehicle which uses the J1850-PWM protocol |
