Theft Deterrent System (W/ Entry And Start System) Security Horn Circuit

Vehicle Interior. Land Cruiser. Urj200, 202 Grj200 Vdj200
Theft Deterrent Keyless Entry. Land Cruiser. Urj200, 202 Grj200 Vdj200

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

PERFORM ACTIVE TEST USING INTELLIGENT TESTER (SECURITY HORN)

INSPECT FUSE (SECURITY)

INSPECT SECURITY RELAY

INSPECT SECURITY HORN ASSEMBLY

CHECK HARNESS AND CONNECTOR (ENGINE ROOM RELAY BLOCK - CERTIFICATION ECU [SMART KEY ECU ASSEMBLY] AND SECURITY HORN)

THEFT DETERRENT SYSTEM (w/ Entry and Start System) - Security Horn Circuit


DESCRIPTION

When the theft deterrent system is operating, the certification ECU (smart key ECU assembly) outputs a signal continuously at 0.4 second intervals, causing the security horn to sound.

WIRING DIAGRAM


Land Cruiser. Urj200, 202 Grj200 Vdj200.Theft Deterrent Keyless Entry.Entry And Start System (For Entry Function).Theft Deterrent System (W/ Entry And Start System) Security Horn Circuit


INSPECTION PROCEDURE

1.PERFORM ACTIVE TEST USING INTELLIGENT TESTER (SECURITY HORN)

  1. Operate the intelligent tester according to the steps on the display and select "Active Test".

    Entry&Start
    Tester Display
    		Test Part
    		Control Range
    		Diagnostic Note
    Security Horn
    		Security horn
    		ON/OFF
    		-
    OK:
    Security horn operates normally.


NG
Go to step 2
OK

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

2.INSPECT FUSE (SECURITY)

  1. Remove the SECURITY fuse from the No. 2 engine room relay block.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    SECURITY fuse
    		Always
    		Below 1 Ω


NG
REPLACE FUSE
OK


3.INSPECT SECURITY RELAY


    Land Cruiser. Urj200, 202 Grj200 Vdj200.Theft Deterrent Keyless Entry.Entry And Start System (For Entry Function).Theft Deterrent System (W/ Entry And Start System) Security Horn Circuit

  1. Remove the security relay from the engine room relay block.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    3 - 5
    		Battery voltage is not applied to terminals 1 and 2
    		10 kΩ or higher
    3 - 5
    		Battery voltage is applied to terminals 1 and 2
    		Below 1 Ω


NG
REPLACE SECURITY RELAY
OK


4.INSPECT SECURITY HORN ASSEMBLY


    Land Cruiser. Urj200, 202 Grj200 Vdj200.Theft Deterrent Keyless Entry.Entry And Start System (For Entry Function).Theft Deterrent System (W/ Entry And Start System) Security Horn Circuit

  1. Remove the security horn (Click here).

  1. Apply battery voltage to the horn connector and check the operation of the horn.

    OK:
    Measurement Condition
    		Specified Condition
    Battery positive (+) → Terminal 1
    Battery negative (-) → Horn bracket
    		Horn sounds


NG
REPLACE SECURITY HORN ASSEMBLY (Click here)
OK


5.CHECK HARNESS AND CONNECTOR (ENGINE ROOM RELAY BLOCK - CERTIFICATION ECU [SMART KEY ECU ASSEMBLY] AND SECURITY HORN)

Land Cruiser. Urj200, 202 Grj200 Vdj200.Theft Deterrent Keyless Entry.Entry And Start System (For Entry Function).Theft Deterrent System (W/ Entry And Start System) Security Horn Circuit

  1. Remove the SECURITY relay from the engine room relay block.

  1. Disconnect the E30 ECU connector.

  1. Disconnect the A19 horn connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    Relay block security relay terminal 1 - E30-20 (SH-)
    		Always
    		Below 1 Ω
    Relay block security relay terminal 3 - A19-1
    		Always
    		Below 1 Ω
    E30-20 (SH-) Body ground
    		Always
    		10 kΩ or higher
    A19-1 - Body ground
    		Always
    		10 kΩ or higher

  1. Measure the voltage according to value(s) in the table below.

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    Relay block security relay terminal 2 - Body ground
    		Always
    		11 to 14 V
    Relay block security relay terminal 5 - Body ground
    		Always
    		11 to 14 V


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)