Добре дошли в света на OBD II

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The ’95 Accord V6 was the first Honda to feature aPGM-FI system that meets the new on-board diagnostics(OBD) requirements known as OBD II. The rest of ourmodels will have OBD II systems by the ’96 model year.OBD II is a comprehensive diagnostic system designedto allow any skilled technician to repair an enginemanagement system problem on any OBD-II-equippedvehicle with the aid of an OBD-II-compatible scan tool.With the scan tool, you can now read much of the samesensor data that the engine control module (ECM) sees.In many cases, you no longer have to reproduce adiagnostic trouble code (DTC); reading the data will tellyou whether there’s a malfunction or not.The SAE-established OBD II guidelines include thesechanges:• A universal 16P diagnostic connector, withstandardized pin assignments, called the data linkconnector (DLC).• A standard list of DTCs for all manufacturers.• Data snapshot capability in the ECM when a faultoccurs.• The ability to record a DTC whenever a fault occursthat affects emissions.• The ability to erase DTCs with the scan tool.The SAE-defined DTCs, for example P0131, arefive-character alphanumeric codes:• First character, area of vehicle: B for body, C forchassis, P for powertrain, and U for undefined.(Currently, only powertrain codes have been defined.)• Second character, code origin: 0 for SAE-controlledcodes, 1 for manufacturer-controlled codes.• Third character, system affected: 1 and 2 for fuel andair metering, 3 for ignition system or misfire, 4 forauxiliary emission controls, 5 for vehicle speed andidle controls, 6 for computer and output circuits, and 7and 8 for transmission.• Fourth and fifth characters, the fault: generalmalfunction, high or low voltage or frequency, or “outof range.”