Land Cruiser URJ200 URJ202 GRJ200 VDJ200 - THEFT DETERRENT / KEYLESS ENTRY

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

PERFORM ACTIVE TEST USING INTELLIGENT TESTER

INSPECT SECURITY HORN ASSEMBLY

INSPECT SECURITY HORN RELAY

CHECK HARNESS AND CONNECTOR (BATTERY - SECURITY HORN RELAY)

CHECK HARNESS AND CONNECTOR (SECURITY HORN RELAY - SECURITY HORN ASSEMBLY)

CHECK HARNESS AND CONNECTOR (SECURITY HORN RELAY - MAIN BODY ECU)

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 (cowl side junction block assembly LH) transmits a signal to cause the security horn to sound at intervals of 0.4 seconds.


WIRING DIAGRAM

Theft Deterrent System (W/O Entry And Start System) - Security Horn Circuit. THEFT DETERRENT / KEYLESS ENTRY. Land Cruiser URJ200 URJ202 GRJ200 VDJ200

INSPECTION PROCEDURE

  • NOTICE:
  • Inspect the fuses for circuits related to this system before performing the following inspection procedure.
1.PERFORM ACTIVE TEST USING INTELLIGENT TESTER

Connect the intelligent tester to the DLC3.

Turn the ignition switch to ON.

Turn the intelligent tester on.

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

According to the display on the intelligent tester, perform the Active Test.

Main Body
Tester DisplayTest PartControl RangeDiagnostic Note
Security HornSecurity hornON / OFF-
  • OK:
  • The security horn assembly sounds and stops correctly when operated through the intelligent tester.
NG
Go to step 2
OK
REPLACE MAIN BODY ECU (COWL SIDE JUNCTION BLOCK ASSEMBLY LH)
2.INSPECT SECURITY HORN ASSEMBLY
Theft Deterrent System (W/O Entry And Start System) - Security Horn Circuit. THEFT DETERRENT / KEYLESS ENTRY. Land Cruiser URJ200 URJ202 GRJ200 VDJ200

Remove the security horn assembly ().

Check the operation of the security horn assembly.

  • Standard:
  • Measurement ConditionSpecified Condition
    Battery positive (+) → Terminal 1Horn sounds
    Battery negative (-) → Horn body
NG
REPLACE SECURITY HORN ASSEMBLY ()
OK
3.INSPECT SECURITY HORN RELAY
Theft Deterrent System (W/O Entry And Start System) - Security Horn Circuit. THEFT DETERRENT / KEYLESS ENTRY. Land Cruiser URJ200 URJ202 GRJ200 VDJ200

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

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

  • Standard Resistance:
  • Tester ConnectionSpecified Condition
    3 - 510 kΩ or higher
    (when battery voltage is not applied between terminals 1 and 2)
    3 - 5Below 1 Ω
    (when battery voltage is applied between terminals 1 and 2)
Text in Illustration
*aSECURITY HORN Relay
NG
REPLACE SECURITY HORN RELAY
OK
4.CHECK HARNESS AND CONNECTOR (BATTERY - SECURITY HORN RELAY)
Theft Deterrent System (W/O Entry And Start System) - Security Horn Circuit. THEFT DETERRENT / KEYLESS ENTRY. Land Cruiser URJ200 URJ202 GRJ200 VDJ200

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

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

  • Standard Voltage:
  • Tester ConnectionConditionSpecified Condition
    Engine room relay block and junction block assembly SECURITY HORN relay terminal 2- Body groundAlways11 to 14 V
    Engine room relay block and junction block assembly SECURITY HORN relay terminal 5 - Body groundAlways11 to 14 V
Text in Illustration
*aEngine Room Relay Block
*bSECURITY HORN Relay
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK
5.CHECK HARNESS AND CONNECTOR (SECURITY HORN RELAY - SECURITY HORN ASSEMBLY)

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

Disconnect the A19 security horn assembly connector.

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

  • Standard Resistance:
  • Tester ConnectionConditionSpecified Condition
    Engine room relay block and junction block assembly SECURITY HORN relay terminal 3 - A19-1AlwaysBelow 1 Ω
    Engine room relay block and junction block assembly SECURITY HORN relay terminal 3 - Body groundAlways10 kΩ or higher
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK
6.CHECK HARNESS AND CONNECTOR (SECURITY HORN RELAY - MAIN BODY ECU)

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

Disconnect the E4 main body ECU connector.

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

  • Standard Resistance:
  • Tester ConnectionConditionSpecified Condition
    Engine room relay block and junction block assembly SECURITY HORN relay terminal 2 - E4-6 (SH)AlwaysBelow 1 Ω
    Engine room relay block and junction block assembly SECURITY HORN relay terminal 2 - Body groundAlways10 kΩ or higher
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK
REPLACE MAIN BODY ECU (COWL SIDE JUNCTION BLOCK ASSEMBLY LH)
THEFT DETERRENT / KEYLESS ENTRY
Land Cruiser URJ200 URJ202 GRJ200 VDJ200
THEFT DETERRENT SYSTEM w/o Entry and Start System