Theft Deterrent System Security Indicator Light Circuit


DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

INSPECT SECURITY INDICATOR LIGHT ASSEMBLY

CHECK WIRE HARNESS (SECURITY INDICATOR LIGHT - THEFT WARNING ECU AND BODY GROUND)

THEFT DETERRENT SYSTEM - Security Indicator Light Circuit


DESCRIPTION

When the theft deterrent system is in the disarmed state, the security indicator light will flash continuously if the immobiliser system is set, or not illuminate if the immobiliser system is not set.
When the theft deterrent system is in the armed state, the immobiliser system is automatically set and the security indicator light will flash continuously.
When the theft deterrent system is in the arming preparation state or alarm sounding state, the theft warning ECU causes the security indicator light to illuminate.

WIRING DIAGRAM


Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.Theft Deterrent.Theft Deterrent System.Theft Deterrent System Security Indicator Light Circuit


INSPECTION PROCEDURE

1.INSPECT SECURITY INDICATOR LIGHT ASSEMBLY
Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50

  1. Remove the security indicator light.

  1. Apply battery voltage between the terminals of the security indicator light, and check the illumination of the security indicator light.

    OK:
    Measurement Condition
    		Specified Condition
    Battery positive (+) → Terminal 2
    Battery negative (-) → Terminal 1
    		Illuminates
    NOTICE:
    1. If the positive (+) lead and the negative (-) lead are incorrectly connected, the security indicator light will not illuminate.
    2. If the voltage is too low, the security indicator light will not illuminate.


NG
REPLACE SECURITY INDICATOR LIGHT ASSEMBLY
OK


2.CHECK WIRE HARNESS (SECURITY INDICATOR LIGHT - THEFT WARNING ECU AND BODY GROUND)
Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.Theft Deterrent.Theft Deterrent System.Theft Deterrent System Security Indicator Light Circuit

  1. Disconnect the S10 indicator connector.

  1. Disconnect the T16 ECU connector.

  1. Measure the resistance of the wire harness side connectors.

    Standard resistance:
    Tester Connection
    		Specified Condition
    T16-22 (IND) - S10-2 (LP)
    		Below 1 Ω
    T16-22 (IND) or S10-2 (LP) - Body ground
    		10 kΩ or higher
    S10-1 (E) - Body ground
    		Below 1 Ω


NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE