Ошибка P0609: блок управления VSS выход B

Many engine or powertrain modules turn the raw wheel or output-shaft speed into a cleaned-up vehicle speed signal and pass it on through their own driver – a square-wave signal whose frequency rises with speed – to the instrument cluster, cruise control, radio or steering. P0609 concerns output B: the module compares the commanded driver state with the actual line state and reports a short to ground or voltage, an open circuit or an internal driver fault, as CARB requires for output components. Output B is a second output; which device hangs on it (cruise module, radio, body builder interface) depends on the wiring diagram. If the speed sensor itself fails, P0500–P0503 set instead. No manufacturer table available to us gives thresholds; GM lists the code in older vehicles. On modern cars speed is shared over CAN, so the code mainly affects older vehicles with a hard-wired speedometer signal.