Security Horn Circuit

THEFT DETERRENT: THEFT DETERRENT SYSTEM: Security Horn Circuit

Security Horn Circuit

DESCRIPTION

During the alarm sounding state, the relay in the ECU turns on and off in a cycle of approximately 0.2 seconds, causing the security horn to sound.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK HARNESS AND CONNECTOR (THEFT WARNING ECU - BATTERY)




(a) Disconnect the T5 ECU connector.
(b) Measure the voltage according to the value(s) in the table below.
Standard voltage:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

2. INSPECT SECURITY HORN ASSEMBLY




(a) Disconnect the T1 security horn connector.
(b) Check the operation of the security horn.
Standard:





NG -- REPLACE SECURITY HORN ASSEMBLY
OK -- Continue to next step.

3. CHECK HARNESS AND CONNECTOR (THEFT WARNING ECU ASSEMBLY - SECURITY HORN ASSEMBLY)




(a) Measure the resistance according to the value(s) in the table below.
Standard resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE THEFT WARNING ECU ASSEMBLY