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DTC B2780 Push Switch/Key Unlock Warning Switch Malfunction: Description

WARNING: This page is about a different car, the 2007 Toyota Tacoma. However, it is still accessible from the selected car via links, so may be relevant.

This DTC will be output if the transponder key ECU does not detect that the unlock warning switch is ON even when the key is inserted into the ignition key cylinder. Under normal conditions, the unlock warning switch is ON when the key is inserted into the ignition key cylinder.

PUSH SWITCH/KEY UNLOCK WARNING SWITCH MALFUNCTION

DTC No. DTC Detection Condition Trouble Areas
B2780 Unlock warning switch ON is not detected when the key is inserted into the ignition key cylinder
  • Unlock warning switch assembly
  • Wire harness and connector
  • Transponder key ECU assembly