Security Horn Circuit

THEFT DETERRENT: THEFT DETERRENT SYSTEM: Security Horn Circuit

Security Horn Circuit

DESCRIPTION

When the theft deterrent system is switched from the armed state to the alarm sounding state, the main body ECU turns on the relay, causing the horns to sound at intervals of 0.4 seconds.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. PERFORM ACTIVE TEST USING TECHSTREAM (SECURITY HORN)
(a) Select the Active Test, use Techstream (with CAN VIM) to generate a command, and then check the security horn operation.

Main Body





OK:
Security horn sounds and stops.
OK -- REPLACE DRIVER SIDE JUNCTION BLOCK ASSEMBLY (MAIN BODY ECU)
NG -- Continue to next step.

2. INSPECT SECURITY HORN




(a) Remove the security horn.
(b) Apply battery voltage to the horn and check operation of the horn.
OK:






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

3. CHECK WIRE HARNESS (MAIN BODY ECU - SECURITY HORN)




(a) Disconnect the B6 ECU connector.
(b) Disconnect the T1 horn connector.
(c) Measure the resistance of the wire harness side connectors.
Standard resistance:






NG -- REPAIR OR REPLACE HARNESS AND CONNECTOR
OK -- REPLACE DRIVER SIDE JUNCTION BLOCK ASSEMBLY (MAIN BODY ECU)