Security Horn Circuit

DESCRIPTION

When the theft deterrent system is operating, the relay in the main body ECU RH turns on and off, causing the security horn to sound.

WIRING DIAGRAM

INSPECTION PROCEDURE

1. INSPECT SECURITY HORN ASSEMBLY

1. Remove the security horn assembly.

2. Check operation of the horn.

   Standard:

   Measurement Condition	Specified Condition
   Battery positive (+) → Terminal 1	Horn sounds
   Battery negative (-) → Horn body

NG	REPAIR OR REPLACE SECURITY HORN ASSEMBLY

OK

2. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU RH (COWL SIDE J/B RH) - SECURITY HORN ASSEMBLY)

1. Disconnect the A36 ECU connector and the A37 horn connector.

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

   Standard resistance:

   Symbol (Terminal Connection)	Specified Condition
   SH (A36-1) - (A37-1)	Below 1 Ω
   SH (A36-1) or (A37-1) - Body ground	10 kΩ or higher

NG	REPAIR OR REPLACE HARNESS OR CONNECTOR

OK
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE