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Home >> Lexus >> 2009 >> IS 250 RWD, Automatic >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Anti-Theft Systems >> Theft Deterrent (Diagnostics) >> Theft Deterrent System >> Horn Circuit >> Description

Horn Circuit: Description

When the theft deterrent system is switched from the armed state to the alarm sounding state, the main body ECU RH transmits a signal to cause the horn to sound at intervals of 0.4 seconds.