: This diagnostic feature is managed by the vehicle's internal computer modules, such as the Mitsubishi Tech Info noted KOS-ECU , WCM , or the ETACS-ECU , depending on the specific model and year. Probable Causes & Resolution
: According to the official Mitsubishi Motors Service Manual, the KOS-ECU or WCM sets code B1A10 strictly when it registers a low-battery voltage signal from Key 1 (the first transmitter registered to the module) for five consecutive transmission cycles. mitsubishi b1a10
Once the battery is replaced, the car's computer needs to acknowledge the new voltage signal. Step inside the vehicle with the freshly updated key fob. : This diagnostic feature is managed by the
This code is triggered by the vehicle's Keyless Operation System (KOS) Electronic Control Unit (ECU). According to Mitsubishi Tech Info Step inside the vehicle with the freshly updated key fob
: If the key fob is stored within 25 feet of a vehicle equipped with a proximity "welcome" feature, constant communication can drain the battery prematurely.
Demystifying the Mitsubishi B1A10 Diagnostic Trouble Code (DTC)