It is a number or a letter that shows the system in the vehicle that has a fault.Ġ – Emission controls: fuel and air meteringĢ – Injector circuit: Fuel & air meteringĪ-F – Hybrid codes Final: The fourth and fifth character Manufacturer specific code The third Character.standardized (SAE) code or generic code.Consists of mechanical functions & systems example, braking, steering, and suspension.Parts that are usually found in the compartment area of passengers in the vehicle.It is managed by an onboard computer system.It includes the vehicle’s engine, transmission, and other associated accessories.It is a letter that denotes the vehicle’s part that has a fault. Here the code is simplified as follows: The First Character By careful reading the letters & numbers, a fault can be found & fixed easily. OBD provides diagnoses for various systems such as powertrain, chassis, body, etc. Now, this error can be pinpointed & can be fixed before the actual breakdown. For example, a car shows the P0200 code, which means that there is a possible injector circuit issue. If we try to interpret it, we can understand the cause of the problem. This code is called a Diagnostic Trouble Code (DTC). Whenever a problem is detected in a vehicle using the OBD, the system shows it as an error code. It uses a broadcast type of bus communication protocol.The communication happens without a host computer.It refers to a network of independent controllers.It works on a 2-wire communication method.Pins 4, 5, 6, 14, and 16 support this protocol.ISO 15765-4 CAN is available in vehicles that were built in 2008 or later in the US.It is used for communication protocol which is applied on the OBD system. This protocol used in Asian vehicles having pin 7 Kline & pin 15 is optional. This protocol is most common in Europe and commonly in Chrysler.It is used for serial asynchronous communication. In this, each bit of information is 96 us long. Logic 0 represents low voltage and logic 1 represents high voltage. ![]() This protocol represents voltage in a logic 0 or 1 form.
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