OBD Clearinghouse

The database contains a vehicle's DLC location and any provided TSB notifications and documents.

DLC Images may not be available for vehicles newer than 2004 model year. A previous model year and similar model may be referenced for general identification of the DLC appearance. Do not contact the OBD Clearinghouse personnel if the vehicle being researched does not have a related image. Thank you.

Documents

Chrysler Dual Protocol Issue
Chrysler OBD Dual Protocol Clearinghouse Letter.doc
Chrysler has provided a document regarding the dual protocol issues for Dodge Truck and Jeep - Engine Control Modules supporting both SAE J1850 and ISO 9141-2 Protocols. Affected vehicles: 1999 - 2004 Jeep Grand Cherokee 2001 - 2004 Jeep Wrangler 2002 - 2003 Jeep Liberty 2001 - 2003 Dodge Dakota 2001 - 2003 Dodge Durango 2002 - 2003 Dodge Ram Pickup

Verified OBD Communication Protocols (Updated 3-16-2009)
OBD_generic_protocols_verified_2009-3-16.xls
OBD II Generic Communication Protocol table listed by Make-Model and Model year OEM's that have updated this table include: Mercedes Toyota/Lexus/Scion Mitsubishi

CAN for Vehicle Emissions Data Communication
CAN Communication for Vehicle Emission Control Systems_article_.pdf
Details of the CAN protocol.