July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

TCL/ASC DTC Set Conditions

Diagnosis code No.1340 is set in the following cases:

Stoplight switch is not operating properly and remains ON state and vehicle speed exceeds 12mph (20km/h) for more than 6 minutes.
Stoplight switch system harness is damaged and no signal is input to TCL/ASC-ECU.