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 immobiliser system. The security indicator light always flashes by receiving a signal from the immobiliser 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.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. INSPECT AIR CONDITIONING CONTROL ASSEMBLY (SECURITY INDICATOR LIGHT)




(a) Disconnect the D3 A/C control connector.
(b) Connect 3 dry batteries of 1.5 V in series.
(c) Apply 4.5 V positive voltage between each terminal of the A/C control, 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 4.5 V will damage the security indicator light.
- If the voltage is too low, the security indicator light does not light up.

NG -- REPLACE AIR CONDITIONING CONTROL ASSEMBLY
OK -- Continue to next step.

2. CHECK HARNESS AND CONNECTOR (THEFT WARNING ECU - SECURITY INDICATOR LIGHT)




(a) Disconnect the T5 ECU and D3 A/C control 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) Disconnect the D3 A/C control connector.
(b) Check the continuity between the wire harness side connectors.
Standard resistance:





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