B2780 TOYOTA - Push Switch/Key Unlock Warning Switch Malfunction
Faulty unlock warning switch assembly
Unlock warning switch assembly wWire harness
Faulty transponder key ECU assembly
When is the code detected?
Unlock warning switch ON is not detected when ignition switch is ON.
Engine Light ON (or Service Engine Soon Warning Light)
B2780 Toyota Description
This Diagnostic Trouble Code (DTC) will be output if the transponder key Electronic Control Unit (ECU) does not detect that the unlock warning switch is ON even when the ignition switch is ON (under normal condition, the unlock warning switch is ON when the ignition switch is ON).