Security Indicator Light Circuit

ENGINE IMMOBILISER SYSTEM: Security Indicator Light Circuit

Security Indicator Light Circuit

DESCRIPTION

When the transponder key is registered, the transponder key ECU assembly outputs the key registration condition by lighting up, blinking or turning off the security indicator.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. PERFORM ACTIVE TEST BY TECHSTREAM
(a) Connect Techstream to the DLC3.
(b) Turn the ignition switch to the ON position.
(c) Perform the Active Test according to the display on the tester.





OK:
The security indicator light turns on and off according to the tester operation.
OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
NG -- Continue to next step.
2. CHECK HARNESS AND CONNECTOR (TRANSPONDER KEY ECU - SECURITY INDICATOR LIGHT)





(a) Disconnect the T10 ECU and S4 indicator connectors.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:





*1: without TVIP System
*2: with TVIP System
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
3. CHECK HARNESS AND CONNECTOR (SECURITY INDICATOR LIGHT - BODY GROUND)





(a) Measure the resistance according to the value(s) in the table below.
Standard resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
4. INSPECT TRANSPONDER KEY ECU ASSEMBLY





(a) Reconnect the T10 ECU and S4 indicator connectors.
(b) Measure the voltage according to the value(s) in the table below.
Standard voltage:





NG -- REPLACE TRANSPONDER KEY ECU ASSEMBLY
OK -- REPLACE SECURITY INDICATOR LIGHT ASSEMBLY