If re-registration fails and the wiring (power, ground, and communication) is verified as normal, the service manual dictates replacing the or Immobilizer-ECU .
: Using a specialized scan tool like the Mitsubishi M.U.T.-III , clear the existing key memory and perform a fresh registration for all ignition keys belonging to the car.
For professional assistance or specialized tools, you can refer to the official Mitsubishi Tech Info portal or visit a certified dealer for key re-programming. Code No.B1766: Transponder registered for other vehicle mitsubishi b1766 verified
This code is part of the vehicle’s immobilizer security system. It is commonly encountered in Mitsubishi models such as the , Outlander , L200 , and i-MiEV .
: Installing a used ETACS-ECU from another car often triggers this code (and potentially P0513) because the ECU expects the keys and VIN from its original donor car. If re-registration fails and the wiring (power, ground,
: Whenever an ECU is replaced, all input and output signal circuits must be verified as normal to prevent damaging the new component. Common Scenarios
The Mitsubishi diagnostic trouble code (DTC) specifically indicates that a transponder key registered for another vehicle is being used in the ignition. When the Electronic Total Automotive Control System (ETACS-ECU) or Immobilizer-ECU detects a key ID that has already been "learned" by a different car's security system, it triggers this code and typically prevents the engine from starting to prevent theft. Understanding Mitsubishi DTC B1766 Code No
: If programming fails, technicians check the CAN bus line for communication errors between the ignition switch and the ECU. 3. ECU Replacement
If you encounter this code, Mitsubishi service manuals recommend a systematic verification process to determine if the issue is the key itself or the control module. 1. Key Verification