Theft Deterrent System Horn Circuit

Vehicle Interior. Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25
Theft Deterrent Keyless Entry. Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK HORN ASSEMBLY

CHECK HARNESS AND CONNECTOR (THEFT WARNING ECU - NO. 1 INTEGRATION RELAY [HORN RELAY])

THEFT DETERRENT SYSTEM - Horn Circuit


DESCRIPTION

When the theft deterrent system is changed from the armed state to the alarm sounding state, the theft warning ECU assembly turns on the HORN relay, causing the vehicle horn to sound at 0.4 seconds intervals.

WIRING DIAGRAM


Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.Theft Deterrent Keyless Entry.Engine Immobiliser System.Theft Deterrent System Horn Circuit


INSPECTION PROCEDURE

NOTICE:
When replacing the theft warning ECU assembly, refer to the registration procedures (HILUX_TGN26 RM000000Z4Z01KX.html).
1.CHECK HORN ASSEMBLY

  1. Press the horn switch and check if the horn sounds.

    Result
    Result
    		Proceed to
    Horn sounds
    		A
    Horn does not sound
    		B


B
Go to HORN SYSTEM (HILUX_TGN26 RM0000045XN00FX.html)
A


2.CHECK HARNESS AND CONNECTOR (THEFT WARNING ECU - NO. 1 INTEGRATION RELAY [HORN RELAY])

  1. Disconnect the G29 theft warning ECU assembly connector.

  1. Disconnect the 1I No. 1 integration relay connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    G29-11 (HORN) - 1I-7
    		Always
    		Below 1 Ω
    G29-11 (HORN) or 1I-7 - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE THEFT WARNING ECU ASSEMBLY (HILUX_TGN26 RM000004QXI007X.html)