ENGINE IMMOBILISER SYSTEM (w/o Smart Key System) Security Indicator Light Does not Blink

DESCRIPTION

• The transponder key ECU assembly blinks the security indicator light when the immobiliser is set (no key is in the ignition key cylinder).

• w/ Theft Deterrent System:

  The main body ECU (multiplex network body ECU) blinks the security indicator light when the theft deterrent system is in the arming preparation state or alarm sounding state.

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1. SYSTEM CHECK

   
   

   1. Check the vehicle specification.

      Result
      Result Proceed to w/o Theft Deterrent System A w/ Theft Deterrent System B

   
   

   B

   PERFORM ACTIVE TEST USING TECHSTREAM (SECURITY INDICATOR LIGHT) Click here

   A

2. PERFORM ACTIVE TEST USING TECHSTREAM

   
   

   1. Connect the Techstream to the DLC3.

   2. Turn the ignition switch to ON.

   3. Turn the Techstream on.

   4. Enter the following menus: Body Electrical / Immobiliser / Active Test.

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

      Immobiliser (Transponder Key ECU Assembly)

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

      OK
      The security indicator light operates normally by using the Active Test.

   
   

   NG

   CHECK HARNESS AND CONNECTOR (AIR CONDITIONING CONTROL ASSEMBLY - TRANSPONDER KEY ECU) Click here

   OK

   REPLACE TRANSPONDER KEY ECU ASSEMBLY Click here

3. CHECK HARNESS AND CONNECTOR (AIR CONDITIONING CONTROL ASSEMBLY - TRANSPONDER KEY ECU)

   
   

   1. Disconnect the security indicator light (air conditioning control assembly) connector.

   2. Disconnect the transponder key ECU assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition I19-8 (IND) - I56-1 (LP) Always Below 1 Ω I19-8 (IND) - Body ground Always 10 kΩ or higher I56-6 (GND) - Body ground Always Below 1 Ω

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

4. CHECK TRANSPONDER KEY ECU ASSEMBLY

   
   

   1. Reconnect the transponder key ECU assembly connector.

   2. Measure the voltage and check the pulse according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Condition Specified Condition I56-1 (LP) - Body ground No key in ignition key cylinder (engine immobiliser system set) Pulse generation I56-1 (LP) - Body ground Key in ignition key cylinder (engine immobiliser system unset) Below 1 V

   
   

   NG

   REPLACE TRANSPONDER KEY ECU ASSEMBLY Click here

   OK

   REPLACE SECURITY INDICATOR LIGHT (AIR CONDITIONING CONTROL ASSEMBLY) Click here

5. PERFORM ACTIVE TEST USING TECHSTREAM (SECURITY INDICATOR LIGHT)

   
   

   1. Connect the Techstream to the DLC3.

   2. Turn the ignition switch to ON.

   3. Turn the Techstream on.

   4. Enter the following menus: Body Electrical / Immobiliser or Main Body / Active Test.

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

      Immobiliser (Transponder Key ECU Assembly)

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

      Main Body (Main Body ECU (Multiplex Network Body ECU))

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

      Result

      Result Proceed to Security indicator light operation is normal when performing the "Main Body" and "Immobiliser" Active Test A Security indicator light operation is not normal when performing the "Immobiliser" Active Test Security indicator light operation is normal when performing the "Main Body" Active Test B Security indicator light operation is normal when performing the "Immobiliser" Active Test Security indicator light operation is not normal when performing the "Main Body" Active Test C Security indicator light operation is not normal when performing the "Main Body" and "Immobiliser" Active Test D

   
   

   B

   CHECK HARNESS AND CONNECTOR (AIR CONDITIONING CONTROL ASSEMBLY - TRANSPONDER KEY ECU) Click here

   C

   CHECK HARNESS AND CONNECTOR (AIR CONDITIONING CONTROL ASSEMBLY - MAIN BODY ECU) Click here

   D

   CHECK HARNESS AND CONNECTOR (AIR CONDITIONING CONTROL ASSEMBLY - MAIN BODY ECU OR TRANSPONDER KEY ECU) Click here

   A

6. CHECK SECURITY INDICATOR LIGHT OPERATION

   
   

   1. When the immobiliser is set, check that the security indicator light blinks.*1

      OK
      The security indicator light blinks normally.

   2. When the theft deterrent system is in the arming preparation state, check that the security indicator light on Click here.*2

      OK
      The security indicator light is on normally.

      Result
      Result Proceed to Both *1 and *2 are OK A *1 is NG (*2 is OK) B *2 is NG (*1 is OK) C Both *1 and *2 are NG D

   
   

   B

   REPLACE TRANSPONDER KEY ECU ASSEMBLY Click here

   C

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

   D

   REPLACE SECURITY INDICATOR LIGHT (AIR CONDITIONING CONTROL ASSEMBLY) Click here

   A

   USE SIMULATION METHOD TO CHECK Click here

7. CHECK HARNESS AND CONNECTOR (AIR CONDITIONING CONTROL ASSEMBLY - TRANSPONDER KEY ECU)

   
   

   1. Disconnect the security indicator light (air conditioning control assembly) connector.

   2. Disconnect the transponder key ECU assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition I19-8 (IND) - I56-1 (LP) Always Below 1 Ω I19-8 (IND) - Body ground Always 10 kΩ or higher

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

   REPLACE TRANSPONDER KEY ECU ASSEMBLY Click here

8. CHECK HARNESS AND CONNECTOR (AIR CONDITIONING CONTROL ASSEMBLY - MAIN BODY ECU)

   
   

   1. Disconnect the security indicator light (air conditioning control assembly) connector.

   2. Disconnect the main body ECU (multiplex network body ECU) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition I12-22 (IND) - I56-1 (LP) Always Below 1 Ω I12-22 (IND) - Body ground Always 10 kΩ or higher

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

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

9. CHECK HARNESS AND CONNECTOR (AIR CONDITIONING CONTROL ASSEMBLY - MAIN BODY ECU OR TRANSPONDER KEY ECU)

   
   

   1. Disconnect the security indicator light (air conditioning control assembly) connector.

   2. Disconnect transponder key ECU assembly connector.

   3. Disconnect the main body ECU (multiplex network body ECU) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition I19-8 (IND) - I56-1 (LP) Always Below 1 Ω I12-22 (IND) - I56-1 (LP) Always Below 1 Ω I56-1 (LP) - Body ground Always 10 kΩ or higher I56-6 (GND) - Body ground Always Below 1 Ω

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

10. REPLACE SECURITY INDICATOR LIGHT (AIR CONDITIONING CONTROL ASSEMBLY)

    
    

    1. Temporarily replace the security indicator light (air conditioning control assembly) with a new or known good one Click here.

    2. When the immobiliser is set or theft deterrent system is in the arming preparation state, check that the security indicator light blinks.

       OK
       Security indicator light blinks.

    
    

    NG

    REPLACE TRANSPONDER KEY ECU ASSEMBLY Click here

    OK

    END (AIR CONDITIONING CONTROL ASSEMBLY WAS DEFECTIVE)

11. REPLACE TRANSPONDER KEY ECU ASSEMBLY

    
    

    1. Temporarily replace the transponder key ECU assembly with a new or known good one Click here.

    2. When the immobiliser is set or theft deterrent system is in the arming preparation state, check that the security indicator light blinks.

       OK
       Security indicator light blinks.

    
    

    NG

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

    OK

    END (TRANSPONDER KEY ECU ASSEMBLY WAS DEFECTIVE)