SMART ENTRY AND START SYSTEM (for Entry Function) All Door Entry Lock/Unlock Functions and Wireless Functions do not Operate

DESCRIPTION

When the entry operation and wireless operation of the door lock functions do not operate, a malfunction or wave interference may be occurring in either of the following: 1) the signal communication line between the door control receiver and certification ECU (smart key ECU assembly) (the line used for entry and wireless operations); or 2) the electrical key transmitter sub-assembly. If the entry lock and wireless lock operations cannot be performed, there may be electrical key transmitter sub-assembly malfunctions, wave interference or problems in the communication which is used for the entry and wireless function between the door control receiver and certification ECU (smart key ECU assembly).

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1. INSPECT BATTERY VOLTAGE

   
   

   1. Measure the voltage of the vehicle battery.

      Standard voltage
      11 to 14 V

      Tech Tips

      It may be possible to tell whether the vehicle battery is discharged by operating the horn.

      
      

      • If the voltage is below 11 V, recharge or replace the vehicle battery before proceeding.

   
   

   NEXT

2. CHECK FOR DTC

   
   

   1. Open the driver door using the mechanical key built into the electrical key transmitter sub-assembly.

   2. Connect the GTS and check for DTCs Click here.

      Tech Tips

      When using the GTS with the vehicle engine switch off, connect the GTS to the vehicle and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the GTS and the vehicle begins. Then select the Model Code "KEY REGIST" under manual mode and enter the following menus: Body Electrical / Entry&Start(CAN). While using the GTS, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the GTS and the vehicle.

      OK
      DTC is not output.

   
   

   NG

   GO TO DIAGNOSTIC TROUBLE CODE CHART Click here

   OK

3. CHECK POWER DOOR LOCK CONTROL SYSTEM

   
   

   1. When the door control switch on the multiplex network master switch assembly on the driver door is operated, check that the doors unlock and lock according to the switch operation Click here.

      OK
      Door locks operate normally.

   
   

   NG

   GO TO POWER DOOR LOCK CONTROL SYSTEM Click here

   OK

4. CHECK KEY DIAGNOSTIC MODE

   
   

   1. Check the following antennas in the key diagnostic mode Click here.

   2. Select either channel 1 or channel 2 and inspect the key diagnostic mode for each channel.

      Tech Tips

      If the buzzer sounds with [CH1] displayed but not with [CH2], the electrical key transmitter cannot be detected by channel 2 due to a malfunction, such as wave interference.

      
      
      1. 

         Text in Illustration

         *A	for LHD
         *B	for RHD
         *a	0.7 to 1 m (2.30 to 3.28 ft.)

         Check the electrical key antenna (for driver door):

         When the electrical key transmitter sub-assembly is brought within 0.7 to 1 m (2.30 to 3.28 ft.) of the front door outside handle assembly (for driver door), check that the wireless door lock buzzer sounds.

      2. 

         Text in Illustration

         *A	for LHD
         *B	for RHD
         *a	0.7 to 1 m (2.30 to 3.28 ft.)

         Check the electrical key antenna (for front passenger door):

         When the electrical key transmitter sub-assembly is brought within 0.7 to 1 m (2.30 to 3.28 ft.) of the front door outside handle assembly (for front passenger door), check that the wireless door lock buzzer sounds.

      3. 

         Text in Illustration

         *a	0.7 to 1 m (2.30 to 3.28 ft.)

         Check the electrical key antenna (for rear door LH):

         When the electrical key transmitter sub-assembly is brought within 0.7 to 1 m (2.30 to 3.28 ft.) of the rear door outside handle assembly (for rear door LH), check that the wireless door lock buzzer sounds.

      4. 

         Text in Illustration

         *a	0.7 to 1 m (2.30 to 3.28 ft.)

         Check the electrical key antenna (for rear door RH):

         When the electrical key transmitter sub-assembly is brought within 0.7 to 1 m (2.30 to 3.28 ft.) of the rear door outside handle assembly (for rear door RH), check that the wireless door lock buzzer sounds.

      5. 

         Text in Illustration

         *a	Inspection Point

         Check the NO. 1 indoor electrical key antenna assembly (front floor):

         When the electrical key transmitter sub-assembly is at the inspection point, check that the wireless door lock buzzer sounds.

      6. 

         Text in Illustration

         *a	Inspection Point

         Check the NO. 1 indoor electrical key antenna assembly (rear floor):

         When the electrical key transmitter sub-assembly is at the inspection point, check that the wireless door lock buzzer sounds.

      7. 

         Text in Illustration

         *a	0.7 to 1 m (2.30 to 3.28 ft.)

         Check the electrical key antenna (outside luggage):

         When the electrical key transmitter sub-assembly is brought within 0.7 to 1 m (2.30 to 3.28 ft.) of the electrical key antenna (outside luggage), check that the wireless door lock buzzer sounds.

         OK
         Wireless door lock buzzer sounds.

         Result
         Result Proceed to Diagnostic mode inspections fail for both channels A Diagnostic mode inspections succeed for both channels B Diagnostic mode inspection succeeds for only one of the channels C

   
   

   B

   B CODE REGISTRATION Click here

   C

   CHECK WAVE ENVIRONMENT Click here

   A

5. CHECK ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY

   
   

   1. Check if there are any other registered electrical key transmitter sub-assemblies.

      Result
      Result Proceed to There are no other registered electrical key transmitter sub-assemblies A There is another registered electrical key transmitter sub-assemblies B

   
   

   B

   CHECK ENTRY DOOR LOCK OPERATION Click here

   A

6. ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY REGISTRATION (NEW ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY)

   
   

   1. Register a new electrical key transmitter sub-assembly.

      Tech Tips

      Refer to the Service Bulletin.

   
   

   NEXT

7. CHECK ENTRY DOOR LOCK OPERATION

   
   

   1. Using another registered electrical key transmitter sub-assembly, check if an entry lock/unlock operation can be performed twice in succession.

      OK
      Entry lock/unlock operate normally.

   
   

   NG

   CHECK WAVE ENVIRONMENT Click here

   OK

8. CHECK TRANSMITTER BATTERY

   
   

   1. Check the transmitter battery level of the electrical key transmitter sub-assembly that was checked first.

      
      

      1. Press and hold the lock switch of the transmitter for 5 seconds and check the number of times that the transmitter LED illuminates.

         Result
         Result Proceed to Transmitter LED does not illuminate when switch is pressed and held A Transmitter LED illuminates 3 times or more when switch is pressed and held B Transmitter LED illuminates once or twice but not a third time C

         Tech Tips

         
         

         • The electrical key transmitter sub-assembly sends voltage information to the certification ECU (smart key ECU assembly) when it is being used. The certification ECU (smart key ECU assembly) displays "Yes" for the "Key Low Battery" item of the Data List when this voltage information indicates 2.2 V or less Click here.

         • Even if the transmitter battery is depleted, it is still possible to start the engine by holding the electrical key transmitter sub-assembly against the engine switch, depressing the brake pedal and pressing the engine switch.

   
   

   B

   REPLACE ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY

   C

   REPLACE TRANSMITTER BATTERY Click here

   A

9. INSPECT TRANSMITTER BATTERY (VOLTAGE)

   
   

   1. Inspect the transmitter battery

      
      
      1. 

         Text in Illustration

         *1

         Lead Wire

         Remove the transmitter battery from the electrical key transmitter sub-assembly that does not operate Click here.

      2. Attach a lead wire (0.60 mm (0.0236 in.) in diameter or less including wire sheath) with tape or equivalent to the negative terminal.

         Note

         Do not wrap the lead wire around a terminal, wedge it between terminals, or solder it. The terminal may be deformed or damaged, and the transmitter battery will not be able to be installed correctly.

      3. Carefully pull the lead wire out from the position shown in the illustration and install the previously removed transmitter battery.

      4. 

         Text in Illustration

         *1

         GND

         Measure the voltage of the transmitter battery.

         Tech Tips

         
         

         • When measuring the transmitter battery voltage, bring the electrical key transmitter sub-assembly within the lock entry operating range while operating the lock sensor of a door handle to perform the measurement.

         • Perform the measurement when the electrical key transmitter sub-assembly is at room temperature.

         • The electrical key transmitter sub-assembly sends voltage information to the certification ECU (smart key ECU assembly) when it is transmitting. When this voltage is 2.2 V or less the Data List item "Key Low Battery" displays "Yes". Click here

         Standard Voltage
         Tester Connection Condition Specified Condition Transmitter battery positive (+) - Transmitter battery negative (-) Engine switch off, all doors closed and lock sensor touched 2.3 to 3.2 V

   
   

   NG

   REPLACE TRANSMITTER BATTERY Click here

   OK

   REPLACE ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY

10. B CODE REGISTRATION

    
    

    1. Perform registration for the B code.

       Note

       In order to register the B code, confirm the smart entry and start system (for Entry Function) precaution Click here and refer to Service Bulletin.

    
    

    NEXT

11. CHECK ENTRY DOOR LOCK OPERATION

    
    

    1. Check the entry lock/unlock operation can be performed twice in succession Click here.

       OK
       Entry lock/unlock operate normally.

    
    

    NG

    READ VALUE USING GTS Click here

    OK

    END (B CODE WAS NOT REGISTERED)

12. READ VALUE USING GTS

    
    

    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

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

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

       Entry&Start

       Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
       B Code Difference	B code mismatch / No or Yes	No: Communication normal Yes: Communication malfunction	-
       B Code	B code registration status / No Regd or Regd	No Regd: B code not registered correctly Regd: B code registered correctly	-

       Result

       Result	Proceed to
       "No" and "No Regd" are displayed on the GTS screen	A
       "Yes" is displayed on the GTS screen	B
       "Yes" and "No Regd" are displayed on the GTS screen	C

    
    

    B

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

    C

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    A

13. CHECK WAVE ENVIRONMENT

    
    

    1. Bring the electrical key transmitter sub-assembly near the door control receiver and perform a wireless and entry function operation check.

       Tech Tips

       
       

       • When the electrical key transmitter sub-assembly is brought near the door control receiver, the possibility of wave interference decreases, and it can be determined if wave interference is causing the problem symptom.

       • If the inspection result is that the problem only occurs in certain locations or at certain times of day, the possibility of wave interference is high. Also, added vehicle components may cause wave interference. If installed, remove them and perform the operation check.

       • There may be wave interference if the vehicle is near broadcasting antennas, large video displays, wireless garage door opener systems, wireless security cameras, home security systems, etc. In this case, move the vehicle to a different location and check if there is any improvement.

       • If a tool for checking electric waves, such as a signal strength meter, is available, move around the area while observing both the LF band (used by the vehicle antenna to form the detection area) and RF band (used by the electrical key transmitter sub-assembly for transmission) to check for locations where there is wave interference.

       OK
       Wireless and entry functions operate normally.

       Result
       Result Proceed to OK A NG (Door Control Receiver with 12 Pin Connector) B NG (Door Control Receiver with 5 Pin Connector) C

    
    

    B

    CHECK CERITIFICATION ECU (SMART KEY ECU ASSEMBLY) Click here

    C

    READ VALUE USING GTS Click here

    A

    AFFECTED BY WAVE INTERFERENCE

14. CHECK CERITIFICATION ECU (SMART KEY ECU ASSEMBLY)

    
    

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

       

       Text in Illustration

       *a

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

       -

       -

    2. Connect the GTS to the DLC3.

    3. Turn the engine switch on (IG).

    4. Turn the GTS on.

    5. Enter the following menus: Body Electrical / Power Source Control / Data List.

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

       Power Source Control

       Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
       Power Supply Condition	Power supply state/IG2 ON, ST ON, All OFF, IG1 ON or ACC ON	ALL OFF: Engine switch off (ACC and IG) ACC ON: Engine switch on (ACC) (ACC relay on) IG1 ON: Engine switch on (IG) (IG1 relay on) IG2 ON: Engine switch on (IG) (IG2 relay on) ST ON: Sending engine start request signal	Since the IG1 and IG2 relays turn on at approximately the same time, IG1 ON may not be displayed (the IG1 relay turns on for a very short time).

    7. Measure the voltage while checking the Data List on the GTS.

       Standard Voltage

       Tester Connection Condition Specified Condition H56-6 (IG1D) - Body ground Engine switch off Below 1 V Engine switch on (ACC) Below 1 V Engine switch on (IG) 9 V or higher A36-9 (IG2D) - Body ground Engine switch off Below 1 V Engine switch on (ACC) Below 1 V Engine switch on (IG) 9 V or higher H56-4 (ACCD) - Body ground Engine switch off Below 1 V Engine switch on (IG) 9 V or higher Engine switch on (ACC) 9 V or higher

       Tech Tips

       Using the GTS, measure the voltage while confirming the power source mode on the Data List.

    
    

    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    OK

15. READ VALUE USING GTS

    
    

    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

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

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

       Entry&Start

       Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
       Ignition Switch	Engine switch on (IG) / ON or OFF	ON: Engine switch on (IG) OFF: Engine switch off	Displays whether the IG power source signal input is on or off. Use this Data List item to help determine the cause when all smart entry and start system/wireless functions do not operate. If the electrical key transmitter sub-assembly is brought inside the vehicle and the engine switch is pressed twice without depressing the brake pedal, the engine switch will turn on (IG). At this time, the key ID code transmitted from the electrical key transmitter sub-assembly and the key ID code stored in the certification ECU (smart key ECU assembly) are compared, and the S code stored in the certification ECU (smart key ECU assembly) and the code stored in the ID code box (immobiliser code ECU) are compared, and if all codes match, the power source mode is considered on (IG) at that time.

    
    

    NG

    CHECK RELAY CONTACT SIDE CIRCUIT

    OK

16. READ VALUE USING GTS

    
    

    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Main Body / Data List.

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

       Main Body

       Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
       ACC SW	Engine switch status / ON or OFF	ON: Engine switch on (ACC) OFF: Engine switch off	-
       IG SW	Engine switch status / ON or OFF	ON: Engine switch to on (IG) OFF: Engine switch off	-

    
    

    NG

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

    OK

17. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - BATTERY AND BODY GROUND)

    
    
    1. 

       Text in Illustration

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

       Disconnect the A36 certification ECU (smart key ECU assembly) connector.

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

       Standard Resistance
       Tester Connection Condition Specified Condition A36-11 (E) - Body ground Always Below 1 Ω

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

       Standard Voltage
       Tester Connection Condition Specified Condition A36-10 (CUTB) - Body ground Always 11 to 14 V A36-2 (+B) - Body ground Always 11 to 14 V

    
    

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

18. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - DOOR CONTROL RECEIVER)

    
    

    1. Door Control Receiver with 5 Pin Connector:

       
       

       1. Disconnect the Q1 certification ECU (smart key ECU assembly) connector.

       2. Disconnect the P30 door control receiver connector.

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

          Standard Resistance
          Tester Connection Condition Specified Condition Q1-5 (RCO) - P30-4 (+5) Always Below 1 Ω Q1-17 (RDAM) - P30-5 (DATA) Always Below 1 Ω Q1-6 (CSEL) - P30-2 (CSEL) Always Below 1 Ω Q1-5 (RCO) or P30-4 (+5) - Body ground Always 10 kΩ or higher Q1-17 (RDAM) or P30-5 (DATA) - Body ground Always 10 kΩ or higher Q1-6 (CSEL) or P30-2 (CSEL) - Body ground Always 10 kΩ or higher

    2. Door Control Receiver with 12 Pin Connector:

       
       

       1. Disconnect the Q1 certification ECU (smart key ECU assembly) connector.

       2. Disconnect the P29 door control receiver connector.

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

          Standard Resistance
          Tester Connection Condition Specified Condition Q1-5 (RCO) - P29-10 (+5) Always Below 1 Ω Q1-17 (RDAM) - P29-9 (DATA) Always Below 1 Ω Q1-6 (CSEL) - P29-6 (CSEL) Always Below 1 Ω Q1-5 (RCO) or P29-10 (+5) - Body ground Always 10 kΩ or higher Q1-17 (RDAM) or P29-9 (DATA) - Body ground Always 10 kΩ or higher Q1-6 (CSEL) or P29-6 (CSEL) - Body ground Always 10 kΩ or higher

    
    

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

19. CHECK DOOR CONTROL RECEIVER

    
    
    1. 

       Text in Illustration

       *A	Door Control Receiver with 5 Pin Connector
       *B	Door Control Receiver with 12 Pin Connector
       *a	Component with harness connected (Door Control Receiver)

       Connect the P30*1 or P29*2 door control receiver connector.

    2. Connect the Q1 certification ECU (smart key ECU assembly) connector.

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

       Standard Resistance
       Tester Connection Condition Specified Condition P30-1 (GND)*1 - Body ground Always Below 1 Ω P29-12 (GND)*2 - Body ground

       
       

       • *1: Door Control Receiver with 5 Pin Connector

       • *2: Door Control Receiver with 12 Pin Connector

       Result
       Result Proceed to OK A NG (for 5 Pin Connector and for Brazil, Aruba, Costa Rica, Panama, or Nicaragua) B NG (for 5 Pin Connector except for Brazil, Aruba, Costa Rica, Panama, or Nicaragua) C NG (Door Control Receiver with 12 Pin Connector) D

    
    

    B

    REPLACE DOOR CONTROL RECEIVER (for Quarter) Click here

    C

    REPLACE DOOR CONTROL RECEIVER (for Rear) Click here

    D

    REPLACE DOOR CONTROL AND TIRE PRESSURE MONITORING SYSTEM RECEIVER ASSEMBLY Click here

    A

20. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    
    

    1. Door Control Receiver with 5 Pin Connector:

       
       

       1. Connect the Q1 certification ECU (smart key ECU assembly) connector.

       2. Connect the P30 door control receiver connector.

       3. 

          Text in Illustration

          *a	Component with harness connected (Door Control Receiver)

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

          Standard Voltage
          Tester Connection Condition Specified Condition P30-4 (+5) - P30-1 (GND) Procedure: Engine switch off Electrical key transmitter sub-assembly switch not pressed Below 1 V Procedure: Engine switch off Electrical key transmitter sub-assembly switch pressed 4.5 to 5.5 V

    2. Door Control Receiver with 12 Pin Connector:

       
       

       1. Connect the Q1 certification ECU (smart key ECU assembly) connector.

       2. Connect the P29 door control receiver connector.

       3. 

          Text in Illustration

          *a	Component with harness connected (Door Control Receiver)

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

          Standard Voltage
          Tester Connection Condition Specified Condition P29-10 (+5) - P29-12 (GND) Procedure: Engine switch off Electrical key transmitter sub-assembly switch not pressed Below 1 V Procedure: Engine switch off Electrical key transmitter sub-assembly switch pressed 4.5 to 5.5 V P29-6 (CSEL) - P29-12 (GND) Engine switch off and all doors closed Below 1 V → 4.4 to 6.5 V → Below 1 V

    
    

    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    OK

21. CHECK DOOR CONTROL RECEIVER

    
    

    1. Door Control Receiver with 5 Pin Connector:

       
       

       1. Connect the Q1 certification ECU (smart key ECU assembly) connector.

       2. Connect the P30 door control receiver connector.

       3. 

          Text in Illustration

          *a	Component with harness connected (Door Control Receiver)

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

          Standard Voltage
          Tester Connection Condition Specified Condition P30-5 (DATA) - P30-1 (GND) Procedure: All doors closed All doors locked Electrical key transmitter sub-assembly switch pressed Below 1 V → 11 to 14 V → Below 1 V P30-2 (CSEL) - P30-1 (GND) Procedure: Engine switch off All doors closed Below 1 V → 4.4 to 6.5 V → Below 1 V

    2. Door Control Receiver with 12 Pin Connector:

       
       

       1. Connect the Q1 certification ECU (smart key ECU assembly) connector.

       2. Connect the P29 door control receiver connector.

       3. 

          Text in Illustration

          *a	Component with harness connected (Door Control Receiver)

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

          Standard Voltage
          Tester Connection Condition Specified Condition P29-9 (DATA) - P29-12 (GND) Procedure: All doors closed All doors locked Electrical key transmitter sub-assembly switch pressed Below 1 V → 10 to 16 V → Below 1 V P29-6 (CSEL) - P29-12 (GND) Procedure: Engine switch off All doors closed Below 1 V → 4.5 to 6 V → Below 1 V

          Result
          Result Proceed to OK A NG (for 5 Pin Connector and for Brazil, Aruba, Costa Rica, Panama, or Nicaragua) B NG (for 5 Pin Connector except for Brazil, Aruba, Costa Rica, Panama, or Nicaragua) C NG (Door Control Receiver with 12 Pin Connector) D

    
    

    B

    REPLACE DOOR CONTROL RECEIVER (for Quarter) Click here

    C

    REPLACE DOOR CONTROL RECEIVER (for Rear) Click here

    D

    REPLACE DOOR CONTROL AND TIRE PRESSURE MONITORING SYSTEM RECEIVER ASSEMBLY Click here

    A

22. REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    
    

    1. Temporarily replace the certification ECU (smart key ECU assembly) with a new one.

       Tech Tips

       Refer to the Service Bulletin.

    
    

    NEXT

23. CHECK WIRELESS DOOR LOCK CONTROL SYSTEM

    
    

    1. Check that the wireless door lock functions operate normally Click here.

       OK
       Wireless door lock functions operate normally.

    
    

    NG

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

    OK

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

24. CHECK WAVE ENVIRONMENT

    
    

    1. Bring the electrical key transmitter sub-assembly that was checked first near the door control receiver and select the failed channel (the channel in which the buzzer did not sound) to recheck the key diagnostic mode Click here.

       Tech Tips

       
       

       • When the electrical key transmitter sub-assembly is brought near the door control receiver, the possibility of wave interference decreases, and it can be determined if wave interference is causing the problem symptom.

       • If the inspection result is that the problem only occurs in certain locations or at certain times of day, the possibility of wave interference is high. Also, added vehicle components may cause wave interference. If installed, remove them and perform the operation check.

       • There may be wave interference if the vehicle is near broadcasting antennas, large video displays, wireless garage door opener systems, wireless security cameras, home security systems, etc. In this case, move the vehicle to a different location and check if there is any improvement.

       • If a tool for checking electric waves, such as a signal strength meter, is available, move around the area while observing both the LF band (used by the vehicle antenna to form the detection area) and RF band (used by the electrical key transmitter sub-assembly for transmission) to check for locations where there is wave interference.

       OK
       Wireless door lock buzzer sounds.

    
    

    NG

    CHECK ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY Click here

    OK

    AFFECTED BY WAVE INTERFERENCE

25. CHECK ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY

    
    

    1. Check if there are any other registered electrical key transmitter sub-assemblies.

       Result
       Result Proceed to There are no other registered electrical key transmitter sub-assemblies A There is another registered electrical key transmitter sub-assemblies B

    
    

    B

    CHECK KEY DIAGNOSTIC MODE Click here

    A

26. ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY REGISTRATION (NEW ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY)

    
    

    1. Register a new electrical key transmitter sub-assembly.

       Tech Tips

       Refer to the Service Bulletin.

    
    

    NEXT

27. CHECK KEY DIAGNOSTIC MODE

    
    

    1. Bring another registered electrical key transmitter sub-assembly near the door control receiver and select the failed channel (the channel in which the buzzer did not sound) to recheck the key diagnostic mode Click here.

       OK
       Wireless door lock buzzer sounds.

    
    

    NG

    CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - DOOR CONTROL RECEIVER) Click here

    OK

    END (ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY THAT WAS INSPECTED FIRST WAS DEFECTIVE)

28. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - DOOR CONTROL RECEIVER)

    
    

    1. Disconnect the Q1 certification ECU (smart key ECU assembly) connector.

    2. Disconnect the P29 door control receiver connector.

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

       Standard Resistance
       Tester Connection Condition Specified Condition Q1-6 (CSEL) - P29-6 (CSEL) Always Below 1 Ω Q1-6 (CSEL) or P29-6 (CSEL) - Body ground Always 10 kΩ or higher

    
    

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

29. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    
    

    1. Connect the Q1 certification ECU (smart key ECU assembly) connector.

    2. Connect the P29 door control receiver connector.

    3. 

       Text in Illustration

       *a	Component with harness connected (Door Control Receiver)

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

       Standard Voltage
       Tester Connection Condition Specified Condition P29-6 (CSEL) - P29-12 (GND) Engine switch off and all doors closed Below 1 V → 4.5 to 6 V → Below 1 V

    
    

    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    OK

30. CHECK DOOR CONTROL RECEIVER

    
    

    1. Connect the Q1 certification ECU (smart key ECU assembly) connector.

    2. Connect the P29 door control receiver connector.

    3. 

       Text in Illustration

       *a	Component with harness connected (Door Control Receiver)

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

       Tech Tips

       Inspection should be performed while the electrical key antenna check in key diagnostic mode is being performed on the failed channel (the channel in which the buzzer did not sound).

       Standard Voltage
       Tester Connection Condition Specified Condition P29-9 (DATA) - P29-12 (GND) Procedure: All doors closed All doors locked Electrical key transmitter sub-assembly switch pressed* Below 1 V → 10 to 16 V → Below 1 V

       
       

       • *: While the electrical key antennas are being inspected in key diagnostic mode Click here.

    
    

    NG

    REPLACE DOOR CONTROL AND TIRE PRESSURE MONITORING SYSTEM RECEIVER ASSEMBLY Click here

    OK

31. REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    
    

    1. Temporarily replace the certification ECU (smart key ECU assembly) with a new one.

       Tech Tips

       Refer to the Service Bulletin.

    
    

    NEXT

32. CHECK WIRELESS DOOR LOCK CONTROL SYSTEM

    
    

    1. Check that the wireless door lock functions operate normally Click here.

       OK
       Wireless door lock functions operate normally.

    
    

    NG

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

    OK

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