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 certification ECU (smart key ECU assembly); 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 smart entry and wireless function.

WIRING DIAGRAM

B007T48E01

INSPECTION PROCEDURE

Note


  • The smart entry and start system (for Entry Function) uses the CAN communication system and LIN communication system. First inspect the communication systems by following How to Proceed with Troubleshooting Click here. Troubleshoot the smart entry and start system (for Entry Function) after confirming that the communication systems are functioning properly.

  • 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.

  • Check that there are no electrical key transmitter sub-assemblies in the vehicle.

  • Before performing the inspection, check that DTC B1242 (wireless door lock control) or DTC B27B0 is not output.

  • Inspect the fuses for circuits related to this system before performing the following procedure.

  • Before replacing the certification ECU (smart key ECU assembly), refer to the smart entry and start system (for Entry Function) precaution Click here.

  • After repair, confirm that no DTCs are output by performing the "DTC Output Confirmation Operation".

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 engine switch off to troubleshoot: Connect the GTS to the DLC3 and turn a courtesy light switch on and off at 1.5 second intervals until communication between the GTS and vehicle begins.

      OK
      DTC is not output.

    NG

    GO TO DIAGNOSTIC TROUBLE CODE CHART Click here

    OK

  3. CHECK DOOR AJAR WARNING OPERATION


    1. When door unlock by entry lock or wireless door lock operation functions even though all doors are closed, check the door ajar warning operation Click here.

      Result
      Result Proceed to
      Door ajar warning does not operate. A
      Door ajar warning operates. B

    B

    GO TO LIGHTING SYSTEM Click here

    A

  4. CHECK POWER DOOR LOCK CONTROL SYSTEM


    1. When the door control switch on the power window regulator 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

  5. CHECK KEY DIAGNOSTIC MODE


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

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

      Tech Tips

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


      1. B007V81E04
        Text in Illustration
        *a 0.7 to 1 m (2.30 to 3.28 ft.)

        Check the No. 1 indoor electrical key antenna assembly (front bumper RH):

        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 RH, check that the wireless door lock buzzer sounds.

      2. B007QURE01
        Text in Illustration
        *a 0.7 to 1 m (2.30 to 3.28 ft.)

        Check the No. 1 indoor electrical key antenna assembly (front bumper LH):

        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 LH, check that the wireless door lock buzzer sounds.

      3. B007WD4E01
        Text in Illustration
        *a Inspection Point

        Check the No. 2 indoor electrical key antenna assembly (front floor):

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

      4. B007UD7E01
        Text in Illustration
        *a Inspection Point

        Check the No. 3 indoor electrical key antenna assembly (rear floor):

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

      5. B007SZDE01
        Text in Illustration
        *a 0.7 to 1 m (2.30 to 3.28 ft.)

        Check the electrical key antenna (back door):

        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 (back door), 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

    CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) Click here

    C

    CHECK WAVE ENVIRONMENT Click here

    A

  6. 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.

    NG

    AFFECTED BY WAVE INTERFERENCE

    OK

  7. 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

    CHECK ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY Click here

    C

    REPLACE TRANSMITTER BATTERY Click here

    A

  8. INSPECT TRANSMITTER BATTERY (VOLTAGE)


    1. Inspect the transmitter battery.

      Note

      When removing the transmitter battery, make sure not to touch the electronic circuit board, as static electricity may cause a malfunction to occur.


      1. Measure the voltage of the transmitter battery Click here.


    NG

    REPLACE TRANSMITTER BATTERY Click here

    OK

    REPLACE ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY

  9. 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 subassemblies A
      There is another registered electrical key transmitter sub-assembly B

    B

    CHECK ENTRY DOOR LOCK OPERATION Click here

    A

  10. 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

  11. 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

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) Click here

    OK

    END (ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY WAS DEFECTIVE)

  12. REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)


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

      Tech Tips

      Refer to the Service Bulletin.


    NEXT

  13. 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 INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY (BODY COMPUTER)

    OK

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

  14. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    B007QY9E04
    Text in Illustration
    *a

    Component with harness connected

    (Certification ECU [Smart Key ECU Assembly])

    		 - -

    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 / Power Source Control / Data List.

    5. According to the display on the GTS, read the Data List.

      Power Source Control
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Power Supply Condition Power supply state / ST ON, All OFF, IG ON or ACC ON

      ALL OFF: Engine switch off (ACC and IG)

      ACC ON: Engine switch on (ACC)

      IG ON: Engine switch on (IG) (IG1 relay on)

      ST ON: Sending engine start request signal

      		 -

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      B75-20 (IG1D) - Body ground Engine switch off Below 1 V
      Engine switch on (ACC) Below 1 V
      Engine switch on (IG) 9 V or higher
      B75-21 (ACCD) - Body ground Engine switch off Below 1 V
      Engine switch on (ACC) 8.5 V or higher
      Engine switch on (IG) 8.5 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. INSPECT IG1 RELAY


    1. Remove the IG1 relay from the instrument panel junction block assembly.

    2. B007U31E01

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      3 - 5 Battery voltage not applied to terminals 1 and 2 10 kΩ or higher
      Battery voltage applied to terminals 1 and 2 Below 1 Ω

    NG

    REPLACE IG1 RELAY

    OK

  16. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU [SMART KEY ECU ASSEMBLY] - IG1 RELAY)


    1. Disconnect the B75 certification ECU (smart key ECU assembly) connector.

    2. Remove the IG1 relay from the instrument panel junction block assembly.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      B75-20 (IG1D) - 1 (IG1 relay) Always Below 1 Ω
      2 (IG1 relay) - Body ground
      B75-20 (IG1D) or 1 (IG1 relay) - Body ground 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  17. INSPECT NO. 2 INTEGRATION RELAY (IG2 RELAY)


    1. Remove the No. 2 integration relay.

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

      B007PTRE02
      Text in Illustration
      *a

      Component without harness connected

      (No. 2 Integration Relay)

      		 - -
      Standard Resistance
      Tester Connection Condition Specified Condition
      12A-1 - 12D-8 Battery voltage not applied to terminals 12D-2 and 12E-4 10 kΩ or higher
      Battery voltage applied to terminals 12D-2 and 12E-4 Below 1 Ω
      12E-7 - 12E-9 Battery voltage not applied to terminals 12E-8 and 12E-4 10 kΩ or higher
      Battery voltage applied to terminals 12E-8 and 12E-4 Below 1 Ω

    NG

    REPLACE NO. 2 INTEGRATION RELAY

    OK

  18. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - NO. 2 INTEGRATION RELAY)


    1. Disconnect the B75 certification ECU (smart key ECU assembly) connector.

    2. Disconnect the 12D and 12E No. 2 integration relay connectors.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      B75-20 (IG1D) - 12D-2 Always Below 1 Ω
      12E-4 - Body ground
      B75-20 (IG1D) or 12D-2 - Body ground 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  19. INSPECT NO.2 INTEGRATION RELAY (ACC RELAY)


    1. Remove the No. 2 integration relay.

      B007PTRE01
      Text in Illustration
      *a

      Component without harness connected

      (No. 2 Integration Relay)

      		 - -

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      12E-7 - 12E-9 Battery voltage not applied to terminals 12E-8 and 12E-4 10 kΩ or higher
      Battery voltage applied to terminals 12E-8 and 12E-4 Below 1 Ω

    NG

    REPLACE NO. 2 INTEGRATION RELAY

    OK

  20. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - NO. 2 INTEGRATION RELAY)


    1. Disconnect the B75 certification ECU (smart key ECU assembly) connector.

    2. Disconnect the 12E No. 2 integration relay connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      B75-21 (ACCD) - 12E-8 Always Below 1 Ω
      12E-4 - Body ground
      B75-21 (ACCD) or 12E-8 - Body ground 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  21. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU [SMART KEY ECU ASSEMBLY] - BATTERY AND BODY GROUND)


    1. B007RT9E02
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Certification ECU [Smart Key ECU Assembly])

      Disconnect the 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
      B75-10 (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
      B75-1 (+B) - Body ground Always 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  22. CHECK ENTRY DOOR LOCK OPERATION


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

    2. Check the entry lock/unlock operation.

      OK
      Entry lock/unlock operate normally.

    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) Click here

    OK

    END (CONNECTOR WAS NOT CONNECTED PROPERLY)

  23. REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)


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

      Tech Tips

      Refer to the Service Bulletin.


    NEXT

  24. 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 INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY (BODY COMPUTER)

    OK

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

  25. 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 and entry functions operate normally.

    NG

    AFFECTED BY WAVE INTERFERENCE

    OK

  26. 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-assembly B

    B

    CHECK WAVE ENVIRONMENT Click here

    A

  27. 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

  28. CHECK WAVE ENVIRONMENT


    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.

      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.

    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) Click here

    OK

    END (ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY WAS DEFECTIVE)

  29. REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)


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

      Tech Tips

      Refer to Service Bulletin.


    NEXT

  30. CHECK WIRELESS DOOR LOCK CONTROL SYSTEM


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

      OK
      Wireless door lock functions operate normally.

    NG

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY (BODY COMPUTER)

    OK

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