Technical Description (Comment)

When the ignition switch is turned ON with the emergency operation by the inversely-inserted keyless operation key, KOS-ECU sends signals to the receiver antenna module. The receiver antenna transmits random numbers to the keyless operation key when it receives signals from KOS-ECU. If an open circuit or short to ground occurs on the wiring harness between KOS-ECU and receiver antenna at this time, KOS-ECU determines that there is a problem.