Security Horn Circuit (from 07/2011)

THEFT DETERRENT / KEYLESS ENTRY: THEFT DETERRENT SYSTEM (for Hatchback): Security Horn Circuit
- Security Horn Circuit

DESCRIPTION

When the theft deterrent system is in the alarm sounding state, the main body ECU outputs a signal repeatedly at 0.4 second intervals, causing the security horn assembly to sound.

WIRING DIAGRAM





INSPECTION PROCEDURE

NOTICE:
Inspect the fuses for circuits related to this system before performing the following inspection procedure.

PROCEDURE

1. PERFORM ACTIVE TEST USING TECHSTREAM (SECURITY HORN)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Main Body / Active Test.

(e) according to the display on the Techstream, perform the Active Test.

Main Body





OK:

The security horn sounds and stops correctly when operating it through the Techstream.

NG -- INSPECT SECURITY HORN ASSEMBLY

OK -- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Theft Deterrent System (for Hatchback)

2. INSPECT SECURITY HORN ASSEMBLY

(a) Inspect the security horn assembly Testing and Inspection.

NG -- REPLACE SECURITY HORN ASSEMBLY Removal (from 07/2011)
OK -- Continue to next step.

3. INSPECT EU-DRL/S-HORN RELAY

(a) Remove the EU-DRL/S-HORN relay from No. 2 engine room relay block.





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

Standard Resistance:





NG -- REPLACE EU-DRL/S-HORN RELAY
OK -- Continue to next step.

4. CHECK HARNESS AND CONNECTOR (EU-DRL/S-HORN RELAY - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY AND SECURITY HORN)

(a) Disconnect the 3C instrument panel junction block assembly connector.

(b) Disconnect the A49 security horn assembly connector.

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

Standard Resistance:





Standard Voltage:





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

5. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

(a) Remove the instrument panel junction block assembly Removal (from 07/2011).





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

Standard Resistance:





Text in Illustration





NG -- REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Removal (from 07/2011)

OK -- REPLACE MAIN BODY ECU Removal (from 07/2011)