Your opinion matters to us, so speak up and be heard!
Opinions, Corrections, Price errors, even technical problem on this store, are welcome!
Thank you again for your feedback, it improves our performance for ALL of You.
Please note: we may not be able to reply directly to suggestions.
How to determine vehicle's OBD2 protocol.
To determine what protocol your vehicle uses, check for a label under the hood or check your vehicle's diagnostic connector.
J1850 PWM - The connector must have pins 2, 4, 5, 10, and 16. May or may not have additional pins.
J1850 VPW - The connector must have pins 2, 4, 5, and 16, but not 10. May or may not have additional pins.
ISO 9141-2 & KPW - The connector must have pins 4, 5, 7, and 16. Pin 15 may or may not be present.
CAN-BUS (J1939 & ISO15765-4) - This type of connector must have pins 6 and 14.
What is CAN-BUS?
Controller–area network (CAN or CAN-bus) is a vehicle bus standard designed to allow microcontrollers and devices to communicate with each other within a vehicle without a host computer.
A modern automobile may have as many as 50 (the Mercedes S-class has about 60 onboard computers) electronic control units (ECU) for various subsystems[citation needed]. Typically the biggest processor is the engine control unit, which is also referred to as "ECU" in the context of automobiles; others are used for transmission, airbags, antilock braking, cruise control, audio systems, windows, doors, mirror adjustment, etc. Some of these form independent subsystems, but communications among others are essential. A subsystem may need to control actuators or receive feedback from sensors. The CAN standard was devised to fill this need.
CAN is used in the OBD-II vehicle diagnostics standard, mandatory for all cars and light trucks sold in the United States since 1996, and the EOBD standard, mandatory for all petrol vehicles sold in the European Union since 2001 and all diesel vehicles since 2004.
Pinouts for common CAN-bus connectors