Security Indicator Light Circuit

THEFT DETERRENT: THEFT DETERRENT SYSTEM: Security Indicator Light Circuit

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 and alarm sounding state, the main body ECU causes the security indicator light to be illuminated.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. PERFORM ACTIVE TEST USING TECHSTREAM (SECURITY INDICATOR LIGHT)
(a) Select the Active Test, use Techstream (with CAN VIM) to generate a command, and then check the security indicator light operation.

Main Body





OK:
Security indicator light turns on and off.
OK -- INSPECT COMBINATION METER ECU (SECURITY INDICATOR LIGHT)
NG -- Continue to next step.

2. CHECK WIRE HARNESS (JOINING CONNECTOR - MAIN BODY ECU)




(a) Disconnect the IG1 joining connector.
(b) Measure the resistance of the wire harness side connector.
Standard resistance:






NG -- REPAIR OR REPLACE HARNESS AND CONNECTOR
OK -- Continue to next step.

3. CHECK WIRE HARNESS (MAIN BODY ECU - JOINING CONNECTOR)




(a) Disconnect the B5 ECU connector.
(b) Disconnect the IG1 joining connector.
(c) Measure the resistance of the wire harness side connectors.
Standard resistance:






NG -- REPAIR OR REPLACE HARNESS AND CONNECTOR
OK -- Continue to next step.

4. INSPECT COMBINATION METER ECU (SECURITY INDICATOR LIGHT)




(a) Disconnect the IG1 joining connector.
(b) Apply 12 V positive voltage to the terminals of the combination meter.
(c) Check that the security indicator light illuminates.
OK:





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

NG -- GO TO METER / GAUGE SYSTEM
OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE