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Home >> Lexus >> 2008 >> IS 250 RWD, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 24 (Theft Deterrent / Keyless Entry) >> Theft Deterrent System >> Security Horn Circuit >> Description

Security Horn Circuit: Description

WARNING: This page is about a different car, the 2008 Lexus IS F. However, it is still accessible from the selected car via links, so may be relevant.

When the theft deterrent system is operating, the relay in the main body ECU RH (cowl side junction block RH) turns on and off, causing the security horn to sound.

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