ENGINE IMMOBILISER SYSTEM (w/o Entry and Start System) Engine does not Start because No Initial Combustion

DESCRIPTION

• When the key is inserted into the ignition key cylinder, the antenna coil receives the key code. Then the amplifier amplifies the ID code and outputs it to the transponder key ECU assembly.

• If this symptom occurs, there may be a communication problem between the transponder key amplifier and the transponder key ECU assembly.

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1. CLEAR DTC

   
   

   1. Clear the DTCs Click here.

   
   

   NEXT

2. CHECK FOR DTC

   
   

   1. Check for DTCs Click here.

      Tech Tips

      Before checking for DTCs, perform the "DTC Output Confirmation Operation" procedure.

      Result

      Result	Proceed to
      No DTC output	A
      DTC output	B

   
   

   B

   GO TO DIAGNOSTIC TROUBLE CODE CHART Click here

   A

3. CONFIRM ENGINE MODELS

   
   

   1. Check the vehicle specifications.

      Result

      Result	Proceed to
      for 1GR-FE	A
      for 1VD-FTV	B

   
   

   B

   READ VALUE USING INTELLIGENT TESTER (IMMOBILISER) Click here

   A

4. READ VALUE USING INTELLIGENT TESTER (IMMOBILISER FUEL CUT)

   
   

   1. Turn the ignition switch off.

   2. Connect the intelligent tester to the DLC3.

   3. Turn the ignition switch to ON.

   4. Turn the intelligent tester on.

   5. Enter the following menus: Powertrain / Engine and ECT / Data List.

      Engine and ECT

      Tester Display	Measurement Item/Range	Normal Condition	Stored as Freeze Frame Data
      Immobiliser Fuel Cut	Status of immobiliser fuel cut/ ON or OFF	-	Yes

      OK
      The item in the Data List indicates "OFF".

   
   

   NG

   READ VALUE USING INTELLIGENT TESTER (IMMOBILISER) Click here

   OK

   GO TO SFI SYSTEM Click here

5. READ VALUE USING INTELLIGENT TESTER (IMMOBILISER)

   
   

   1. Turn the ignition switch off.

   2. Connect the intelligent tester to the DLC3.

   3. Turn the ignition switch to ON.

   4. Turn the intelligent tester on.

   5. Enter the following menus: Body / Immobiliser / Data List.

      Immobiliser

      Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
      Immobiliser	Engine immobiliser system status determined by transponder key ECU assembly / Set or Unset	Set: Engine immobiliser set (engine start prohibited (no key in ignition key cylinder)) Unset: Engine immobiliser unset (engine start permitted (key inserted in ignition key cylinder))	When the engine immobiliser system does not change to the unset state, this item can be used to determine if the cause is the transponder key ECU assembly.

      OK
      On the intelligent tester screen, the display changes between Set and Unset as shown in the table above.

   
   

   NG

   READ VALUE USING INTELLIGENT TESTER (IMMOBILISER) Click here

   OK

   GO TO ENGINE DOES NOT START BUT INITIAL COMBUSTION OCCURS Click here

6. READ VALUE USING INTELLIGENT TESTER (IMMOBILISER)

   
   

   1. Perform inspection using a different key that has been registered to the vehicle.

   2. Turn the ignition switch off.

   3. Connect the intelligent tester to the DLC3.

   4. Turn the ignition switch to ON.

   5. Turn the intelligent tester on.

   6. Enter the following menus: Body / Immobiliser / Data List.

      Immobiliser

      Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
      Immobiliser	Engine immobiliser system status determined by transponder key ECU assembly / Set or Unset	Set: Engine immobiliser set (engine start prohibited (no key in ignition key cylinder)) Unset: Engine immobiliser unset (engine start permitted (key inserted in ignition key cylinder))	When the engine immobiliser system does not change to the unset state, this item can be used to determine if the cause is the transponder key ECU assembly.

      OK
      On the intelligent tester screen, the display changes between Set and Unset as shown in the table above.

   
   

   NG

   CHECK TRANSPONDER KEY AMPLIFIER (VC5 SIGNAL) Click here

   OK

7. CHECK WHETHER ENGINE STARTS WITH OTHER KEYS

   
   

   1. Perform inspection using a different key that has been registered to the vehicle.

   2. Turn the ignition switch to ON, wait for 5 seconds, and then attempt to start the engine.

      Result

      Result	Proceed to
      Engine cannot be started	A
      Engine can be started	B

   
   

   B

   REPLACE KEY Click here

   A

   GO TO ENGINE DOES NOT START BUT INITIAL COMBUSTION OCCURS Click here

8. CHECK TRANSPONDER KEY AMPLIFIER (VC5 SIGNAL)

   
   

   1. Disconnect the E95 transponder key amplifier connector.

   2. 

      Text in Illustration

      *a	Front view of wire harness connector (to Transponder Key Amplifier)
      *b	Waveform

      Using an oscilloscope, check the waveform.

      
      

      1. Waveform (Reference)

         Measurement Condition

         Item	Content
         Tester Connection	E95-1 (VC5) - Body ground
         Tool Setting	1 V/DIV., 20 ms./DIV.
         Condition	Key inserted in ignition key cylinder

         OK
         Waveform is output normally (refer to illustration).

   
   

   NG

   CHECK HARNESS AND CONNECTOR (TRANSPONDER KEY AMPLIFIER - TRANSPONDER KEY ECU ASSEMBLY, IG TERMINAL VOLTAGE) Click here

   OK

   REPLACE TRANSPONDER KEY ECU ASSEMBLY

9. CHECK HARNESS AND CONNECTOR (TRANSPONDER KEY AMPLIFIER - TRANSPONDER KEY ECU ASSEMBLY, IG TERMINAL VOLTAGE)

   
   

   1. Disconnect the E95 transponder key amplifier connector.

   2. Disconnect the E96 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 E95-1 (VC5) - E96-14 (VC5) Always Below 1 Ω E95-7 (AGND) - E96-5 (AGND) Always Below 1 Ω E95-1 (VC5) - Body ground Always 10 kΩ or higher

   4. 

      Text in Illustration

      *a	Front view of wire harness connector (to Transponder Key ECU Assembly)

      Reconnect the transponder key amplifier connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition E96-2 (IG) - E96-16 (GND) Ignition switch ON 11 to 14 V

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

10. CHECK TRANSPONDER KEY AMPLIFIER (TXCT SIGNAL)

    
    

    1. Disconnect the E95 transponder key amplifier connector.

    2. 

       Text in Illustration

       *a	Front view of wire harness connector (to Transponder Key Amplifier)
       *b	Waveform

       Using an oscilloscope, check the waveform.

       
       

       1. Waveform (Reference)

          Measurement Condition

          Item	Content
          Tester Connection	E95-5 (TXCT) - Body ground
          Tool Setting	1 V/DIV., 20 ms./DIV.
          Condition	Key inserted in ignition key cylinder

          OK
          Waveform is output normally (refer to illustration).

    
    

    NG

    CHECK HARNESS AND CONNECTOR (TRANSPONDER KEY AMPLIFIER - TRANSPONDER KEY ECU ASSEMBLY) Click here

    OK

    REPLACE TRANSPONDER KEY ECU ASSEMBLY

11. CHECK HARNESS AND CONNECTOR (TRANSPONDER KEY AMPLIFIER - TRANSPONDER KEY ECU ASSEMBLY)

    
    

    1. Disconnect the E95 transponder key amplifier connector.

    2. Disconnect the E96 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 E95-5 (TXCT) - E96-4 (TXCT) Always Below 1 Ω E95-5 (TXCT) - Body ground Always 10 kΩ or higher

    
    

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

12. CHECK TRANSPONDER KEY AMPLIFIER (CODE SIGNAL)

    
    

    1. Disconnect the E95 transponder key amplifier connector.

    2. 

       Text in Illustration

       *a	Front view of wire harness connector (to Transponder Key Amplifier)
       *b	Waveform

       Using an oscilloscope, check the waveform.

       
       

       1. Waveform (Reference)

          Measurement Condition

          Item	Content
          Tester Connection	E95-4 (CODE) - Body ground
          Tool Setting	1 V/DIV., 20 ms./DIV.
          Condition	Key inserted in ignition key cylinder

          OK
          Waveform is output normally (refer to illustration).

    
    

    NG

    CHECK HARNESS AND CONNECTOR (TRANSPONDER KEY AMPLIFIER - TRANSPONDER KEY ECU ASSEMBLY) Click here

    OK

    REPLACE TRANSPONDER KEY ECU ASSEMBLY

13. CHECK HARNESS AND CONNECTOR (TRANSPONDER KEY AMPLIFIER - TRANSPONDER KEY ECU ASSEMBLY)

    
    

    1. Disconnect the E95 transponder key amplifier connector.

    2. Disconnect the E96 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 E95-4 (CODE) - E96-15 (CODE) Always Below 1 Ω E95-4 (CODE) - Body ground Always 10 kΩ or higher

    4. Reconnect the transponder key ECU assembly connector.

    5. Reconnect the transponder key amplifier connector.

    6. 

       Text in Illustration

       *a	Front view of wire harness connector (to Transponder Key Amplifier)
       *b	Waveform

       Using an oscilloscope, check the waveform.

       
       

       1. Waveform (Reference)

          Measurement Condition

          Item	Content
          Tester Connection	E95-4 (CODE) - Body ground
          Tool Setting	1 V/DIV., 20 ms./DIV.
          Condition	Key inserted in ignition key cylinder

          OK
          Waveform is output normally (refer to illustration).

          Result

          Result	Proceed to
          Terminal CODE stuck high (5 V)	A
          Terminal CODE stuck low (1 V or less)	B
          Problem in wire harness or connector	C

    
    

    B

    REPLACE TRANSPONDER KEY ECU ASSEMBLY Click here

    C

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    A

14. REPLACE TRANSPONDER KEY AMPLIFIER

    
    

    1. Replace the transponder key amplifier Click here.

    
    

    NEXT

15. CHECK WHETHER ENGINE STARTS

    
    

    1. Check that the engine starts with an already registered vehicle key.

       OK
       Engine starts normally.

    
    

    NG

    REPLACE TRANSPONDER KEY ECU ASSEMBLY Click here

    OK

    END (TRANSPONDER KEY AMPLIFIER WAS DEFECTIVE)

16. REPLACE TRANSPONDER KEY ECU ASSEMBLY

    
    

    1. Replace the transponder key ECU assembly.

    
    

    NEXT

17. REGISTER KEY

    
    

    1. Reregister the key (refer to the Service Bulletin).

    
    

    NEXT

18. REGISTER ECU COMMUNICATION ID

    
    

    1. Register the ECU communication ID (refer to the Service Bulletin).

    
    

    NEXT

19. CHECK WHETHER ENGINE STARTS

    
    

    1. Check that the engine starts with an already registered vehicle key.

       OK
       Engine starts normally.

    
    

    NG

    REPLACE KEY Click here

    OK

    END (TRANSPONDER KEY ECU ASSEMBLY WAS DEFECTIVE)

20. REPLACE KEY

    
    

    1. Replace the transponder key master transmitter with a new one (refer to the Service Bulletin).

    
    

    NEXT

21. REREGISTER KEY

    
    

    1. Reregister the key (refer to the Service Bulletin).

    
    

    NEXT

22. CHECK WHETHER ENGINE STARTS

    
    

    1. Check that the engine starts with an already registered vehicle key.

       OK
       Engine starts normally.

       Result

       Result	Proceed to
       OK	A
       NG (for 1GR-FE)	B
       NG (for 1VD-FTV)	C

    
    

    B

    GO TO SFI SYSTEM Click here

    C

    GO TO ECD SYSTEM Click here

    A

    END (KEY (TRANSPONDER KEY MASTER TRANSMITTER) WAS DEFECTIVE)