Toyota Lexus Is250, Is220D. Gse20 Ale20THEFT DETERRENT THEFT DETERRENT SYSTEM (w/ Intrusion Sensor) PRECAUTION PARTS LOCATION SYSTEM DIAGRAM SYSTEM DESCRIPTION HOW TO PROCEED WITH TROUBLESHOOTING CUSTOMIZE PARAMETERS PROBLEM SYMPTOMS TABLE TERMINALS OF ECU DIAGNOSIS SYSTEM DTC CHECK / CLEAR DATA LIST / ACTIVE TEST DIAGNOSTIC TROUBLE CODE CHART B2761 B2763 B2762 ON-VEHICLE INSPECTION Engine Hood Courtesy Switch Circuit Horn Circuit Security Horn Circuit Ignition Switch Circuit Theft Warning Siren Circuit Security Indicator Light Circuit ECU Power Source Circuit THEFT DETERRENT SYSTEM (w/o Intrusion Sensor) PRECAUTION PARTS LOCATION SYSTEM DIAGRAM SYSTEM DESCRIPTION HOW TO PROCEED WITH TROUBLESHOOTING CUSTOMIZE PARAMETERS PROBLEM SYMPTOMS TABLE TERMINALS OF ECU DIAGNOSIS SYSTEM DATA LIST / ACTIVE TEST ON-VEHICLE INSPECTION Engine Hood Courtesy Switch Circuit Horn Circuit Security Horn Circuit Ignition Switch Circuit Security Indicator Light Circuit ECU Power Source Circuit ENGINE HOOD COURTESY SWITCH COMPONENTS REMOVAL INSPECTION INSTALLATION SECURITY HORN ASSEMBLY COMPONENTS REMOVAL INSPECTION INSTALLATION