ENTRY AND START SYSTEM(for Start Function) New Key cannot be Registered

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DESCRIPTION

If a new electrical key transmitter sub-assembly could not be registered, wave interference or a malfunction of the certification ECU (smart key ECU assembly), electrical key transmitter sub-assembly, ID code box (immobiliser code ECU), steering lock ECU (steering lock actuator or upper bracket assembly) or door control receiver assembly is suspected.

The registration procedure to add another electrical key transmitter sub-assembly (without replacing any parts) is called "additional key ID registration".

If additional registration is not possible, refer to Additional Key cannot be Registered.

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CAUTION / NOTICE / HINT

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PROCEDURE

1. Click here

   CHECK FOR DTC

   
   

   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 / Trouble Codes.

   5. Check for DTCs.

      
      
      1. Body Electrical > Entry&Start > Trouble Codes
      2. 
         
      3. 
         
      Note:

      If a malfunction occurs, do not remove/install the vehicle auxiliary battery before checking for DTCs.

      OK
      DTCs are not output.

      Result
      Proceed to OK NG

   
   
   • OKClick here
   • NG

     GO TO DIAGNOSTIC TROUBLE CODE CHARTClick here

2. Click here

   READ VALUE USING GTS (NUMBER OF REGISTERED KEY CODES)

   
   

   1. Enter the following menus: Body Electrical / Entry&Start / Data List.

   2. Read the Data List according to the display on the GTS.

      Tip:

      A new certification ECU (smart key ECU assembly) will have no registered electrical key transmitter sub-assemblies.

      
      
      1. Body Electrical > Entry&Start > Data List

         Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
         Number of Registered Key Codes	Number of registered electrical key transmitter sub-assemblies	0 to 8	Number of registered electrical key transmitter sub-assemblies	Up to 7 electrical key transmitter sub-assemblies can be registered

      2. 
         
         10. 
             
      
      
      1. Body Electrical > Entry&Start > Data List

         Tester Display
         Number of Registered Key Codes

      2. 
         
         1. 
            
      3. 
         
         10. 
             

      OK
      "0" is displayed on the GTS display.

      Result
      Proceed to OK NG

   
   
   • OKClick here
   • NG

     REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

3. Click here

   READ VALUE USING GTS (OPERATION HISTORY LIST)

   
   

   1. Enter the following menus: Body Electrical / Entry&Start / Utility / Operation History / Certification ECU operation log of ID code registration.

      
      
      1. Body Electrical > Entry&Start > Utility

         Tester Display
         Operation History

      2. 
         
         1. 
            
      3. 
         
         10. 
             

      Certification ECU operation log of ID code registration

      Parameter Name Detection Condition Trouble Area Proceed to Failed Registration Mode A registration request was sent while in another mode. During registration a different registration request was sent. Certification ECU (smart key ECU assembly) A Vehicle ID not set A vehicle ID has not been registered in the certification ECU (smart key ECU assembly). Certification ECU (smart key ECU assembly) B Key Registration Max A registration request is sent when the maximum number of electrical key transmitter sub-assemblies has already been registered. Certification ECU (smart key ECU assembly) ID code box (immobiliser code ECU) C ID-BOX Error A registration request is sent even though whether the vehicle is provided with an ID code box is unknown. Certification ECU (smart key ECU assembly) ID code box (immobiliser code ECU) D Vehicle Speed Too High (This applies only when registration fails even though the vehicle is stationary. Make sure that the vehicle is stationary first.) A registration request is sent with a vehicle speed of 5 km/h or more. Certification ECU (smart key ECU assembly) E No ECU Response The steering lock ECU (steering lock actuator or upper bracket assembly) was not connected. Certification ECU (smart key ECU assembly) ID code box (immobiliser code ECU) Steering lock ECU (steering lock actuator or upper bracket assembly) F L Code Verification Error The L codes registered in the ID code box (immobiliser code ECU) and steering lock ECU (steering lock actuator or upper bracket assembly) did not match. Certification ECU (smart key ECU assembly) ID code box (immobiliser code ECU) Steering lock ECU (steering lock actuator or upper bracket assembly) G L Code OK S Code NG The L code verification was successful but the S code stored in the ID code box (immobiliser code ECU) and certification ECU (smart key ECU assembly) did not match. Certification ECU (smart key ECU assembly) ID code box (immobiliser code ECU) C Key Verification: Max Number The number of electrical key transmitter sub-assemblies registered in the ID code box (immobiliser code ECU) was more than 7. ID code box (immobiliser code ECU) H Key Verification: Amp Abnormal Malfunction of the immobiliser amplifier, such as a short to ground. Certification ECU (smart key ECU assembly) Power switch I Key Verification: Read Error Although a registered electrical key transmitter sub-assembly was held near the power switch, immobiliser function certification was not successful. Certification ECU (smart key ECU assembly) Electrical key transmitter sub-assembly J Unverified Key Although all of the registered electrical key transmitter sub-assemblies had been held near the power switch, electrical key transmitter sub-assembly registration was not possible due to immobiliser function certification not being successful. Certification ECU (smart key ECU assembly) Electrical key transmitter sub-assembly K Transponder Key Amp Error Malfunction of the immobiliser amplifier, such as a short to ground. Certification ECU (smart key ECU assembly) Power switch I New Key Registration Error Although an unregistered electrical key transmitter sub-assembly was held near the power switch, electrical key transmitter sub-assembly registration is not possible due to immobiliser function certification not being successful. Certification ECU (smart key ECU assembly) Electrical key transmitter sub-assembly L New Key Vehicle ID Error Although an unregistered electrical key transmitter sub-assembly was held near the power switch, electrical key transmitter sub-assembly registration is not possible due to the vehicle ID not being stored successfully. Certification ECU (smart key ECU assembly) Electrical key transmitter sub-assembly L New Key Registration Failed After successful immobiliser function certification, time expired before smart recognition completion confirmation or a registration cancellation request was sent. Certification ECU (smart key ECU assembly) Electrical key transmitter sub-assembly L New Key Already Registered Although a registered electrical key transmitter sub-assembly was held near the power switch, time expired or a registration cancellation request was sent. Certification ECU (smart key ECU assembly) M New Key ID Code Error Electrical key transmitter sub-assembly registration was not possible due to the certification ECU (smart key ECU assembly) not being able to store the information of the electrical key transmitter sub-assembly to EEPROM correctly. Certification ECU (smart key ECU assembly) B No Response Registering L/S Code The certification ECU (smart key ECU assembly), ID code box (immobiliser code ECU) or steering lock ECU (steering lock actuator or upper bracket assembly) was not connected. Certification ECU (smart key ECU assembly) ID code box (immobiliser code ECU) Steering lock ECU (steering lock actuator or upper bracket assembly) F S Code Verification NG The S code could not be stored by the certification ECU (smart key ECU assembly) or ID code box (immobiliser code ECU). Certification ECU (smart key ECU assembly) ID code box (immobiliser code ECU) C L Code Verification NG The L code could not be stored by the steering lock ECU (steering lock actuator or upper bracket assembly) or ID code box (immobiliser code ECU). Certification ECU (smart key ECU assembly) ID code box (immobiliser code ECU) Steering lock ECU (steering lock actuator or upper bracket assembly) G ECU ID Verification Error The code received from the ID code box (immobiliser code ECU) when the S code is registered does not match the code of the certification ECU (smart key ECU assembly). Certification ECU (smart key ECU assembly) ID code box (immobiliser code ECU) C Key Number Write Error The certification ECU (smart key ECU assembly) could not store the number of electrical key transmitter sub-assemblies to EEPROM. Certification ECU (smart key ECU assembly) B ID Code BOX Write Error The certification ECU (smart key ECU assembly) could not store the information of whether the ID code box was provided in the vehicle to EEPROM. Certification ECU (smart key ECU assembly) B

   
   
   • AClick here
   • B

     REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

   • CClick here
   • D

     CHECK FOR DTC B2789Click here

   • EClick here
   • F

     CHECK FOR DTC B2785Click here

   • GClick here
   • H

     REPLACE ID CODE BOX (IMMOBILISER CODE ECU)

   • I

     CHECK FOR DTC B278A or B2784Click here

   • JClick here
   • KClick here
   • LClick here
   • M
     

     1. Check if a registered electrical key transmitter sub-assembly was held near the power switch instead of an unregistered electrical key transmitter sub-assembly by mistake.

     
     

     1. Perform registration again using an unregistered electrical key transmitter sub-assembly. If the same problem occurs again, replace the certification ECU (smart key ECU assembly).

4. Click here

   CHECK REGISTRATION MODE

   
   

   1. Make sure that another mode or different registration mode is not selected.

      OK
      Another mode or a different registration mode is not selected.

      Tip:

      If any mode has been selected, it is necessary to cancel the mode.

      Result
      Proceed to OK NG

   
   
   • OK

     REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

   • NG

     PERFORM REREGISTRATION

5. Click here

   CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

   
   

   1. Temporarily replace the certification ECU (smart key ECU assembly) with a new one and register the electrical key transmitter sub-assemblies.

      Tip:

      Refer to Service Bulletin.

      OK
      All of the electrical key transmitter sub-assemblies could be registered to the new certification ECU (smart key ECU assembly) successfully.

      Result
      Proceed to OK NG

   
   
   • OK

     END (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) WAS DEFECTIVE)

   • NG

     REPLACE ID CODE BOX (IMMOBILISER CODE ECU)

6. Click here

   READ VALUE USING GTS (VEHICLE SPEED METER)

   
   

   1. Enter the following menus: Body Electrical / Combination Meter / Data List.

   2. Read the Data List according to the display on the GTS.

      
      
      1. Body Electrical > Combination Meter > Data List

         Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
         Vehicle Speed Meter	Vehicle speed	Min.: 0 km/h (0 mph), Max.: 326 km/h (202 mph)	Vehicle stopped: 0 km/h (0 mph)	-

      2. 
         
         10. 
             
      
      
      1. Body Electrical > Combination Meter > Data List

         Tester Display
         Vehicle Speed Meter

      2. 
         
         1. 
            
      3. 
         
         10. 
             

      OK
      "0 km/h (0 mph)" is displayed when the vehicle is stationary.

      Result
      Proceed to OK NG

   
   
   • OK

     REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

   • NG

     GO TO METER / GAUGE SYSTEMClick here

7. Click here

   CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

   
   

   1. Temporarily replace the certification ECU (smart key ECU assembly) with a new one and register the electrical key transmitter sub-assemblies.

      Tip:
      

      • For replacement.

        Click here

      • For registration.

        Click here

      OK
      All of the electrical key transmitter sub-assemblies could be registered to the new certification ECU (smart key ECU assembly) successfully.

      Result
      Proceed to OK NG

   
   
   • OK

     END (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) WAS DEFECTIVE)

   • NGClick here
8. Click here

   CHECK STEERING LOCK ECU (STEERING LOCK ACTUATOR OR UPPER BRACKET ASSEMBLY)

   
   

   1. Temporarily replace the steering lock ECU (steering lock actuator or upper bracket assembly) with a new one and register the electrical key transmitter sub-assemblies.

      Click here

      OK
      All of the electrical key transmitter sub-assemblies could be registered to the new steering lock ECU (steering lock actuator or upper bracket assembly) successfully.

      Result
      Proceed to OK NG

   
   
   • OK

     END (STEERING LOCK ECU (STEERING LOCK ACTUATOR OR UPPER BRACKET ASSEMBLY) WAS DEFECTIVE)

   • NG

     REPLACE ID CODE BOX (IMMOBILISER CODE ECU)

9. Click here

   CHECK ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY

   
   

   1. Make sure that a registered electrical key transmitter sub-assembly is being used.

      OK
      A registered electrical key transmitter sub-assembly is being used.

      Result
      Proceed to OK NG

   
   
   • OKClick here
   • NG

     USE A REGISTERED ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY AND PERFORM REREGISTRATION

10. Click here

    CHECK NUMBER OF REGISTERED ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLIES

    
    

    1. Check the number of registered electrical key transmitter sub-assemblies.

       Result
       Result Proceed to Only one electrical key transmitter sub-assembly is registered A 2 or more electrical key transmitter sub-assemblies are registered B

    
    
    • AClick here

      GO TO STEP 12

    • BClick here
11. Click here

    REREGISTRATION

    
    

    1. Reregister the electrical key transmitter sub-assemblies using different order combinations.

       Tip:
       

       • Refer to Service Bulletin.

       • If there are 2 or more electrical key transmitter sub-assemblies, make sure that the number of order combinations is the same as the number of electrical key transmitter sub-assemblies so that each transmitter can be checked first.

       Table 1. Example: When there are 3 registered electrical key transmitter sub-assemblies (A, B and C).

       Combination	Order*
       1	A → B → C
       2	B → C→ A
       3	C → A → B

       
       

       • *: Except for the first electrical key transmitter sub-assembly, the remaining electrical key transmitter sub-assemblies can be checked in any order.

       OK
       "Key Verification: Read Error" is not displayed.

       Result
       Proceed to OK NG

    
    
    • OK

      REPLACE ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY (ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY HELD WHEN "Key Verification: Read Error" WAS DETECTED WAS DEFECTIVE)

    • NGClick here
12. Click here

    CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    
    

    1. Temporarily replace the certification ECU (smart key ECU assembly) with a new one and register the electrical key transmitter sub-assemblies.

       Tip:

       Refer to Service Bulletin.

       OK
       All of the electrical key transmitter sub-assemblies could be registered to the new certification ECU (smart key ECU assembly) successfully.

       Result
       Proceed to OK NG

    
    
    • OK

      END (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) WAS DEFECTIVE)

    • NG

      REPLACE ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY

13. Click here

    CHECK FOR ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY

    
    

    1. Check that all registered electrical key transmitter sub-assemblies are available.

       OK
       No registered electrical key transmitter sub-assemblies are missing.

       Result
       Proceed to OK NG

    
    
    • OKClick here
    • NG

      ERASE ALL REGISTERED ELECTRICAL KEY TRANSMITTERS EXCEPT ONE, THEN REGISTER THE REMAINING ELECTRICAL KEY TRANSMITTERS

14. Click here

    REREGISTRATION

    
    

    1. Register the electrical key transmitter sub-assemblies using different order combinations.

       Tip:
       

       • Refer to Service Bulletin.

       • If there are 2 or more electrical key transmitter sub-assemblies, make sure that the number of order combinations is the same as the number of electrical key transmitter sub-assemblies so that each transmitter can be checked first.

       Table 2. Example: When there are 3 registered electrical key transmitter sub-assemblies (A, B and C).

       Combination	Order*
       1	A → B → C
       2	B → C→ A
       3	C → A → B

       
       

       • *: Except for the first electrical key transmitter sub-assembly, the remaining electrical key transmitter sub-assemblies can be checked in any order.

       OK
       "Key Verification: Read Error" is not displayed.

       Result
       Proceed to OK NG

    
    
    • OK

      REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    • NG

      REPLACE ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY (ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY HELD WHEN "Key Verification: Read Error" WAS DETECTED WAS DEFECTIVE)

15. Click here

    REREGISTRATION

    
    

    1. Using an unregistered electrical key transmitter sub-assembly, register the ID.

       Tip:

       Refer to Service Bulletin.

       OK
       The key ID can be registered.

       Result
       Proceed to OK NG

    
    
    • OK

      END (ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY WAS DEFECTIVE)

    • NG

      REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)