IMMOBILISER SYSTEM Security Indicator Light Does not Blink

DESCRIPTION

• The certification ECU (smart key ECU assembly) blinks the security indicator light (combination meter assembly) when the immobiliser is set (power switch off).

• The certification ECU (smart key ECU assembly) receives the security indicator light signal from the main body ECU (multiplex network body ECU) via CAN communication when the theft deterrent system is in the arming preparation state or alarm sounding state. Then, the certification ECU (smart key ECU assembly) blinks the security indicator light (combination meter assembly).

WIRING DIAGRAM

*a	Main Body ECU (Multiplex Network Body ECU)
*b	Security Indicator Light (Combination Meter Assembly)
*c	Certification ECU (Smart Key ECU Assembly)
*d	CAN Communication Line

CAUTION / NOTICE / HINT

PROCEDURE

1. CHECK FOR DTC

   
   

   1. Check for DTCs.

      
      Body Electrical > Entry&Start > Trouble Codes
      Powertrain > Hybrid Control > Trouble Codes

      OK
      DTCs are not output.

      Result
      Proceed to OK NG

   
   

   NG

   GO TO DIAGNOSTIC TROUBLE CODE CHART Click here

   OK

2. PERFORM ACTIVE TEST USING GTS (IMMOBILISER INDICATOR)

   
   

   1. Connect the GTS to the DLC3.

   2. Turn the power switch on (IG).

   3. Turn the GTS on.

   4. Enter the following menus: Body Electrical / Entry&Start / Active Test.

   5. Perform the Active Test according to the display on the GTS.

      
      Body Electrical > Entry&Start > Active Test

      Tester Display	Measurement Item	Control Range	Diagnostic Note
      Immobiliser Indicator	Security indicator light	OFF/ON	-

      
      Body Electrical > Entry&Start > Active Test

      Tester Display
      Immobiliser Indicator

      OK
      The security indicator light (combination meter assembly) operates normally.

      Result
      Proceed to OK NG

   
   

   NG

   CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - SECURITY INDICATOR LIGHT (COMBINATION METER ASSEMBLY)) Click here

   OK

3. CHECK SECURITY INDICATOR LIGHT (COMBINATION METER ASSEMBLY) OPERATION

   
   

   1. When the immobiliser is set, check that the security indicator light (combination meter assembly) blinks.*1

      OK
      The security indicator light (combination meter assembly) blinks normally.

   2. When the theft deterrent system is in the arming preparation state, check that the security indicator light (combination meter assembly) illuminates.*2

      OK
      The security indicator light (combination meter assembly) illuminates normally.

      Result
      Result Proceed to *1 is NG (*2 is OK) A *2 is NG (*1 is OK) B

   
   

   A

   REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

   B

   REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Click here

4. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - SECURITY INDICATOR LIGHT (COMBINATION METER ASSEMBLY))

   
   

   1. Disconnect the I1 certification ECU (smart key ECU assembly) connector.

   2. Disconnect the I7 security indicator light (combination meter assembly) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition I1-20 (IND) - I7-2 (LP) Always Below 1 Ω I1-20 (IND) or I7-2 (LP) - Body ground Always 10 kΩ or higher

      Result
      Proceed to OK NG

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

5. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

   
   

   1. Reconnect the I1 certification ECU (smart key ECU assembly) connector.

   2. Reconnect the I7 security indicator light (combination meter assembly) connector.

   3. 

      *a	Component with harness connected (Certification ECU (Smart Key ECU Assembly))

      Using an oscilloscope, check the waveform.

      Measurement Condition
      Tester Connection Condition Specified Condition I1-20 (IND) - Body ground Power switch off → on (IG) Pulse generation → Below 2 V

      Result
      Proceed to OK NG

   
   

   OK

   REPLACE SECURITY INDICATOR LIGHT (METER CIRCUIT PLATE) Click here

   NG

   REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)