B2485

THEFT DETERRENT: THEFT DETERRENT SYSTEM: B2485: Security Horn Circuit Transistor
B2485 - Security Horn Circuit Transistor

DESCRIPTION

This DTC is output when one of the following occurs: 1) security horn is malfunctioning; 2) front light ECU (front controller) is malfunctioning; or 3) the wire harness between the front light ECU and security horn is open or shorted.





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. PERFORM ACTIVE TEST USING TECHSTREAM (SECURITY HORN)

(a) Operate the Techstream according to the steps on the display and select "Active Test".

Body No. 5





OK:

Security horn operates normally.

NG -- INSPECT SECURITY HORN ASSEMBLY

OK -- REPLACE FRONT LIGHT ECU

2. INSPECT SECURITY HORN ASSEMBLY

(a) Remove the security horn Removal.





(b) Check operation of the horn.

OK:





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

3. CHECK HARNESS AND CONNECTOR (FRONT LIGHT ECU - SECURITY HORN)

(a) Disconnect the A52 ECU connector.





(b) Disconnect the A29 horn connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE FRONT LIGHT ECU