Security Indicator Light Circuit

THEFT DETERRENT: THEFT DETERRENT SYSTEM: Security Indicator Light Circuit

Security Indicator Light Circuit

DESCRIPTION

Even in the disarming state, the security indicator light flashes due to a signal output from the immobilizer system. The security indicator light always flashes by receiving a signal from the immobilizer system at any time in the armed state.
The theft warning ECU assembly causes the security indicator light to light up or blink only during the customizing function mode or the add mode of the transmitter registration.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. INSPECT COMBINATION METER ASSEMBLY (SECURITY INDICATOR LIGHT)





(a) Disconnect the combination meter connector.
(b) Apply 12 V positive voltage between each terminal of the combination meter, and check the lighting condition of the security indicator light.
Result:





NOTICE:
- If the positive (+) lead and the negative (-) lead are incorrectly connected, the security indicator light does not light up.
- Voltage of more than 12 V will damage the security indicator light.
- If the voltage is too low, the security indicator light does not light up.

NG -- REPLACE COMBINATION METER ASSEMBLY
OK -- Continue to next step.
2. CHECK HARNESS AND CONNECTOR (THEFT WARNING ECU - SECURITY INDICATOR LIGHT)





(a) Disconnect the T5 ECU and C10 combination meter connectors.
(b) Check the continuity between the wire harness side connectors.
Standard resistance:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
3. CHECK HARNESS AND CONNECTOR (SECURITY INDICATOR LIGHT - BODY GROUND)





(a) Check the continuity between the wire harness side connectors.
Standard resistance:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE THEFT WARNING ECU ASSEMBLY