Description of On-Board Diagnostics

DIAGNOSIS SYSTEM

When a system error is detected, the LEXUS link system informs the driver of the error by illuminating the LEDs on the telephone switch assy (Mayday switch) and providing the following voice warning.

"A LEXUS link system error has been detected. Please contact your LEXUS dealer."

Also, in the case, the system will make a service call to the LEXUS link center.
- While the ignition switch is ON, the telephone ECU assy (Mayday ECU) cannot receive either BEAN signal or discrete signal from the airbag sensor assy center for 10 seconds or more.