Theft Deterrent System (W/O 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 GTS (SECURITY HORN)

INSPECT SECURITY HORN ASSEMBLY

INSPECT HORN RELAY (S-HORN)

CHECK HARNESS AND CONNECTOR (HORN RELAY [S-HORN] - MAIN BODY ECU [MULTIPLEX NETWORK BODY ECU])

CHECK HARNESS AND CONNECTOR (BATTERY - HORN RELAY [S-HORN])

CHECK HARNESS AND CONNECTOR (HORN RELAY [S-HORN] - SECURITY HORN ASSEMBLY AND BODY GROUND)

CHECK HARNESS AND CONNECTOR (HORN RELAY [S-HORN] - COWL SIDE JUNCTION BLOCK LH)

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


DESCRIPTION

When the theft deterrent system is switched from the armed state to the alarm sounding state, the main body ECU (multiplex network body ECU) transmits a signal to cause the security horn to sound at intervals of 0.4 seconds.

WIRING DIAGRAM


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


INSPECTION PROCEDURE

NOTICE:
  1. If the main body ECU (multiplex network body ECU) is replaced, refer to the Service Bulletin.
  2. Inspect the fuses for circuits related to this system before performing the following inspection procedure.
  3. *: w/ Door Control Battery
    As the door control battery is installed between the vehicle battery and main body ECU (multiplex network body ECU), first perform the inspections in On-Vehicle Inspection to confirm that there are no malfunctions in the power source circuit for the main body ECU (multiplex network body ECU) before performing this troubleshooting procedure (Click here).
1.PERFORM ACTIVE TEST USING GTS (SECURITY HORN)

  1. Connect the GTS to the DLC3.

  1. Turn the ignition switch ON.

  1. Turn the GTS on.

  1. Enter the following menus: Body Electrical / Main Body / Active Test.

  1. According to the display on the GTS, perform the Active Test.

    Main Body
    Tester Display
    		Test Part
    		Control Range
    		Diagnostic Note
    Security Horn
    		Security horn
    		OFF/ON
    		-
OK:
The security horn assembly sounds and stops correctly when operated through the GTS.
Result
Result
Proceed to
OK (for LHD)
A
OK (for RHD)
B
NG
C


B
REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) (Click here)

C
Go to step 2
A

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) (Click here)

2.INSPECT SECURITY HORN ASSEMBLY

  1. Remove the security horn assembly (Click here).

  1. Inspect the security horn assembly (Click here).



NG
REPLACE SECURITY HORN ASSEMBLY (Click here)
OK


3.INSPECT HORN RELAY (S-HORN)


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

  1. Remove the horn relay (S-HORN).

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    3-5
    		When battery voltage is applied between terminals 2-1
    		Below 1 Ω
    3-5
    		When battery voltage is not applied between terminals 2-1
    		10 kΩ or higher


NG
REPLACE HORN RELAY [S-HORN]
OK


4.CHECK HARNESS AND CONNECTOR (HORN RELAY [S-HORN] - MAIN BODY ECU [MULTIPLEX NETWORK BODY ECU])

  1. Remove the main body ECU (multiplex network body ECU) from the cowl side junction block LH.

    1. for LHD: Click here
    2. for RHD: Click here

  1. Connect the cowl side junction block LH connectors.

  1. Remove the horn relay (S-HORN).

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    2 - A-29 (SH)
    		Always
    		Below 1 Ω
    2 - Body ground
    		Always
    		10 kΩ or higher
    A-29 (SH) - Body ground
    		Always
    		10 kΩ or higher


NG
Go to step 7
OK


5.CHECK HARNESS AND CONNECTOR (BATTERY - HORN RELAY [S-HORN])
Land Cruiser. Urj200, 202 Grj200 Vdj200

  1. Remove the horn relay (S-HORN).

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

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    1 - Body ground
    		Always
    		11 to 14 V
    5 - Body ground
    		Always
    		11 to 14 V


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


6.CHECK HARNESS AND CONNECTOR (HORN RELAY [S-HORN] - SECURITY HORN ASSEMBLY AND BODY GROUND)

  1. Remove the horn relay (S-HORN).

  1. Disconnect the A53 security horn assembly connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    3 - A53-1
    		Always
    		Below 1 Ω
    3 - Body ground
    		Always
    		10 kΩ or higher
    A53-1 - Body ground
    		Always
    		10 kΩ or higher
    Result
    Result
    		Proceed to
    OK (for LHD)
    		A
    OK (for RHD)
    		B
    NG
    		C


B
REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) (Click here)

C
REPAIR OR REPLACE HARNESS OR CONNECTOR
A

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) (Click here)

7.CHECK HARNESS AND CONNECTOR (HORN RELAY [S-HORN] - COWL SIDE JUNCTION BLOCK LH)

  1. Disconnect the 2H cowl side junction block LH connector.

  1. Remove the horn relay (S-HORN).

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    2 - 2H-26
    		Always
    		Below 1 Ω
    2 - Body ground
    		Always
    		10 kΩ or higher
    2H-26 - Body ground
    		Always
    		10 kΩ or higher
    Result
    Result
    		Proceed to
    OK (for LHD)
    		A
    OK (for RHD)
    		B
    NG
    		C


B
REPLACE COWL SIDE JUNCTION BLOCK LH (Click here)

C
REPAIR OR REPLACE HARNESS OR CONNECTOR
A

REPLACE COWL SIDE JUNCTION BLOCK LH (Click here)