2006 Lexus SC 430 — Service Manual
Home >> Lexus >> 2006 >> SC 430 V8-4.3L (3UZ-FE) >> Repair and Diagnosis >> Accessories and Optional Equipment >> Antitheft and Alarm Systems >> Testing and Inspection >> Component Tests and General Diagnostics >> Theft Deterrent System >> Horn Circuit

Horn Circuit

HORN CIRCUIT

CIRCUIT DESCRIPTION

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

Wiring Diagram:






Step 1-3:




Step 4-5:




Step 6:




INSPECTION PROCEDURE