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FAQ

Will the OBD system stop work if relevant circuit

No, the OBD system is part of the ECU internal engine control system and is not controlled by the MIL lamp. On the contrary, the MIL lamp is controlled by the OBD system according to the corresponding strategy. It is also part of the OBD sy...

Does My Car Have OBD-II?

All cars and light trucks built and sold in the United States after January 1, 1996 were required to be OBD II equipped. In general, this means all 1996 model year cars and light trucks are compliant, even if built in late 1995. Two factors will show if your vehicle is definitely OBD II equipped: 1) There will be an OBD II connector as shown below, and 2) There will be a note on a sticker or nameplate under the hood: OBD II compliant. The Connector Pin 2 - J1850 Bus+ Pin 4 - Chassis Ground Pin 5...

What information can be obtained from OBD system?

The information provided by the OBD system includes: 1. Some important real-time parameters of the electronic control system, including engine speed, coolant temperature, vehicle speed, oxygen sensor signal, etc. 2. The function and working state of OBD system itself, such as which diagnostic functions it has, whether the diagnosis is completed, the number of faults and the state of the fault lamp, and some important system parameters at the moment of the fault occurring. 3. Detailed results of...

WHAT IS OBD?

OBD stands for O n- B oard D iagnostics. It is a computer-based system originally designed to reduce emissions by monitoring the performance of major engine components. A basic OBD system consists of an ECU (Electronic Control Unit), which uses input from various sensors (e.g., oxygen sensors) to control the actuators (e.g., fuel injectors) to get the desired performance. The Check Engine light, also known as the MIL (Malfunction Indicator Light), provides an early warning of malfunctions to the...

Which OBD-II protocol is supported by vehicle?

All cars and light trucks built for sale in the United States after 1996 are required to be OBDII compliant. The European Union adopted a similar law in 2000 for gasoline-powered vehicles, and in 2003 for cars with diesel engines. An OBD-II compliant vehicle can use any of the five communication protocols: J1850 PWM and VPW, ISO9141, ISO14230 (also known as Keyword Protocol 2000), and more recently, CAN (ISO15765/SAE J2480). Car manufacturers were not allowed to use CAN until model year 2003. As...