The latter can be quite expensive, costing thousands of dollars - plus annual software updates that can add hundreds more.įor advanced diagnostics that go beyond simply reading powertrain fault codes and sensor data, you need a professional level tool or a factory tool. #Nissan data scan what is clear self learn software How Information Moves Around Your Car in a CAN System So if you need advanced diagnostics, the only option for most motorists and DIYers is to take your vehicle to a repair shop that has the proper diagnostic equipment. Like many current vehicles, information in a CAN-equipped vehicle is shared over a serial data bus. #Nissan data scan what is clear self learn serial The bus is the circuit that carries all the electronic chatter between modules (nodes). If it has two, the wires are usually twisted to cancel out electromagnetic interference. The speed at which the bus carries information will vary depending on the "class" rating of the bus as well as the protocol to which it conforms.Ī data bus with a "Class A" speed rating is a relatively slow, low-speed circuit that typically carries less than 10 kilobits (10 Kbps) of information per second. #Nissan data scan what is clear self learn isoĪ data bus that operates at Class A speeds is limited to simple command functions like operating power mirrors, power seats, power widows, power door locks, remote trunk releases and lights.Ī data bus with a "Class B" rating, by comparison, may operate from 10 Kbps up to 125 Kbps, depending on the operating protocol (SAE J1850 or Europe's ISO 9141-2).
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