ENGINE IMMOBILISER SYSTEM (w/ Smart Entry and Start System) Security Indicator Light Circuit

DESCRIPTION

The security indicator light blinks continuously due to a continuous signal received from the certification ECU (smart key ECU assembly) while in the armed state.

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1. PERFORM ACTIVE TEST USING INTELLIGENT TESTER (SECURITY INDICATOR LIGHT)

   
   

   1. Connect the intelligent tester to the DLC3.

   2. Turn the engine switch on (IG).

   3. Turn the tester on.

   4. Perform the Active Test according to the display on the tester.

      Smart Key (Certification ECU (Smart Key ECU Assembly)):

      Tester Display	Test Part	Control Range	Diagnostic Note
      Security Indic	Security indicator light	ON/OFF	-

      OK
      The security indicator light turns on and off according to the tester operation.

   
   

   NG

   CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - SECURITY INDICATOR LIGHT) Click here

   OK

   REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

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

   
   

   1. 

      Disconnect the certification ECU (smart key ECU assembly) and security indicator light connectors.

   2. Measure the resistance according to the value(s) in the table below.

      Standard resistance
      Tester Connection Condition Specified Condition D36-2 (IND) - E13-2 (IND+) Always Below 1 Ω D36-2 (IND) - Body ground Always 10 kΩ or higher

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

3. CHECK HARNESS AND CONNECTOR (SECURITY INDICATOR LIGHT - BODY GROUND)

   
   

   1. 

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

      Standard resistance
      Tester Connection Condition Specified Condition E13-5 (E) - Body ground Always Below 1 Ω

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

   REPLACE SECURITY INDICATOR LIGHT Click here