DTC B2780: Push Switch/Key Unlock Warning Switch Malfunction: Description
WARNING: This page is about a different car, the 2008 Lexus RX 350. 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 ignition switch is on (Under the normal conditions, the unlock warning switch is on when the ignition switch is on).
DIAGNOSTIC TROUBLE CODE TABLE
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| B2780 | "Unlock warning switch on" is not detected when ignition switch is on |
|