Security Indicator Light Circuit

ENGINE IMMOBILISER: 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 USING TECHSTREAM
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the tester on.
(d) Enter the following menus: Body Electrical / Immobiliser / Active Test.
(e) Perform the Active Test according to the display on the tester.

Immobiliser:





OK:
Security indicator turns ON and OFF
OK -- INSPECT TRANSPONDER KEY ECU ASSEMBLY
NG -- Continue to next step.
2. CHECK HARNESS AND CONNECTOR (TRANSPONDER KEY ECU - SECURITY INDICATOR LIGHT)




(a) Disconnect the D23 transponder key ECU connector.
(b) Disconnect the D25 security indicator connector.
(c) Measure the resistance.
Standard resistance:





(d) Reconnect the D23 transponder key ECU connector.
(e) Reconnect the D25 security indicator connector.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
3. INSPECT TRANSPONDER KEY ECU ASSEMBLY




(a) Measure the voltage.
Standard voltage:






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