WIRELESS DOOR LOCK CONTROL SYSTEM Only Wireless Control Function is Inoperative

DESCRIPTION

When the 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 wireless operations); or 2) the electrical key transmitter sub-assembly. If the 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 wireless function between the door control receiver and certification ECU (smart key ECU assembly).

WIRING DIAGRAM

A01FIABE02

INSPECTION PROCEDURE

Note


  • The wireless door lock control system 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 wireless door lock control system after confirming that the communication systems are functioning properly.

  • 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.

  • 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) is not output Click here.

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

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

  • The door control receiver has a constant voltage (5 V) supply circuit connected to terminal "+5".

  • When replacing the door control receiver, read the transmitter IDs (tire pressure warning system) stored in the old ECU using the GTS and write them down before removal Click here (for 12 Pin Type).

  • It is necessary to perform initialization Click here after registration Click here of the transmitter IDs into the door control receiver if the door control receiver has been replaced (for 12 Pin Type).

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 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 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 WIRELESS DOOR LOCK OPERATION Click here

    A

  5. 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

  6. CHECK WIRELESS DOOR LOCK OPERATION


    1. Using another registered electrical key transmitter sub-assembly, check that the wireless door lock functions operate normally Click here.

      OK
      Entry lock/unlock operate normally.

    NG

    CHECK WAVE ENVIRONMENT Click here

    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

    REPLACE ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY Click here

    C

    REPLACE TRANSMITTER BATTERY Click here

    A

  8. INSPECT TRANSMITTER BATTERY (VOLTAGE)


    1. Inspect the transmitter battery Click here.


    NG

    REPLACE TRANSMITTER BATTERY Click here

    OK

    REPLACE ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY Click here

  9. 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

    CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) Click here

    OK

    AFFECTED BY WAVE INTERFERENCE

  10. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)


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

      A01FI9AE18
      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 Switch Condition Specified Condition
      N93-6 (IG1D) - Body ground Engine switch off Below 1 V
      Engine switch on (ACC) Below 1 V
      Engine switch on (IG) 9 V or higher
      A34-9 (IG2D) - Body ground Engine switch off Below 1 V
      Engine switch on (ACC) Below 1 V
      Engine switch on (IG) 9 V or higher
      N93-4 (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

  11. READ VALUE USING GTS (ACC SW, IG SW)


    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

      		 ON" is also displayed for this item when the engine switch is on (IG).
      IG SW Engine switch status / ON or OFF

      ON: Engine switch to on (IG)

      OFF: Engine switch off

      		 "OFF" is also displayed for this item when the engine switch is on (ACC).

    NG

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

    OK

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


    1. A01FF0KE05
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Certification ECU [Smart Key ECU Assembly])

      Disconnect the A34 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
      A34-11 (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
      A34-10 (CUTB) - Body ground Always 11 to 14 V
      A34-2 (+B) - Body ground Always 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. for LHD, for 12 Pin Type:


      1. Disconnect the T2 certification ECU (smart key ECU assembly) connector.

      2. Disconnect the T32 door control receiver connector.

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        T2-5 (RCO) - T32-10 (+5) Always Below 1 Ω
        T2-17 (RDAM) - T32-9 (DATA) Always Below 1 Ω
        T2-6 (CSEL) - T32-6 (CSEL) Always Below 1 Ω
        T2-5 (RCO) or T32-10 (+5) - Body ground Always 10 kΩ or higher
        T2-17 (RDAM) or T32-9 (DATA) - Body ground Always 10 kΩ or higher
        T2-6 (CSEL) or T32-6 (CSEL) - Body ground Always 10 kΩ or higher

      4. Connect the T2 certification ECU (smart key ECU assembly) connector.

    2. for LHD, except 12 Pin Type:


      1. Disconnect the T2 certification ECU (smart key ECU assembly) connector.

      2. Disconnect the T33 door control receiver connector.

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        T2-5 (RCO) - T33-2 (+5) Always Below 1 Ω
        T2-17 (RDAM) - T33-3 (DATA) Always Below 1 Ω
        T2-6 (CSEL) - T33-5 (CSEL) Always Below 1 Ω
        T2-5 (RCO) or T33-2 (+5) - Body ground Always 10 kΩ or higher
        T2-17 (RDAM) or T33-3 (DATA) - Body ground Always 10 kΩ or higher
        T2-6 (CSEL) or T33-5 (CSEL) - Body ground Always 10 kΩ or higher

      4. Connect the T2 certification ECU (smart key ECU assembly) connector.

    3. for RHD, for 12 Pin Type:


      1. Disconnect the U2 certification ECU (smart key ECU assembly) connector.

      2. Disconnect the T32 door control receiver connector.

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        U2-5 (RCO) - T32-10 (+5) Always Below 1 Ω
        U2-17 (RDAM) - T32-9 (DATA) Always Below 1 Ω
        U2-6 (CSEL) - T32-6 (CSEL) Always Below 1 Ω
        U2-5 (RCO) or T32-10 (+5) - Body ground Always 10 kΩ or higher
        U2-17 (RDAM) or T32-9 (DATA) - Body ground Always 10 kΩ or higher
        U2-6 (CSEL) or T32-6 (CSEL) - Body ground Always 10 kΩ or higher

      4. Connect the U2 certification ECU (smart key ECU assembly) connector.

    4. for LHD, except 12 Pin Type:


      1. Disconnect the U2 certification ECU (smart key ECU assembly) connector.

      2. Disconnect the T33 door control receiver connector.

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        U2-5 (RCO) - T33-2 (+5) Always Below 1 Ω
        U2-17 (RDAM) - T33-3 (DATA) Always Below 1 Ω
        U2-6 (CSEL) - T33-5 (CSEL) Always Below 1 Ω
        U2-5 (RCO) or T33-2 (+5) - Body ground Always 10 kΩ or higher
        U2-17 (RDAM) or T33-3 (DATA) - Body ground Always 10 kΩ or higher
        U2-6 (CSEL) or T33-5 (CSEL) - Body ground Always 10 kΩ or higher

      4. Connect the U2 certification ECU (smart key ECU assembly) connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  14. CHECK DOOR CONTROL RECEIVER


    1. for 12 Pin Type:


      1. A01FG5CE46
        Text in Illustration
        *a

        Component with harness connected

        (Door Control Receiver)

        Connect the door control receiver connector.

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        T32-12 (GND) - Body ground Always Below 1 Ω

    2. except 12 Pin Type:


      1. A01FJ2HE01
        Text in Illustration
        *a

        Component with harness connected

        (Door Control Receiver)

        Connect the door control receiver connector.

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        T33-6 (GND) - Body ground Always Below 1 Ω

    NG

    REPLACE DOOR CONTROL RECEIVER Click here

    OK

  15. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)


    1. for 12 Pin Type:


      1. A01FG5CE47
        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
        T32-10 (+5) - T32-12 (GND)

        Procedure:


        1. Engine switch off

        2. Electrical key transmitter sub-assembly switch not pressed

        		 Below 1 V

        Procedure:


        1. Engine switch off

        2. Electrical key transmitter sub-assembly switch pressed

        		 4.5 to 5.5 V
        T32-6 (CSEL) - T32-12 (GND) Engine switch off and all doors closed Below 1 V → 4.4 to 6.5 V → Below 1 V
        T32-1 (IG) - T32-12 (GND) Engine switch on (IG) 10 to 16 V

    2. except 12 Pin Type:


      1. A01FJ2HE02
        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
        T33-2 (+5) - T33-6 (GND)

        Procedure:


        1. Engine switch off

        2. Electrical key transmitter sub-assembly switch not pressed

        		 Below 1 V

        Procedure:


        1. Engine switch off

        2. Electrical key transmitter sub-assembly switch pressed

        		 4.5 to 5.5 V
        T33-5 (CSEL) - T33-6 (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

  16. CHECK DOOR CONTROL RECEIVER


    1. for 12 Pin Type:


      1. A01FG5CE52
        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
        T32-9 (DATA) - T32-12 (GND)

        Procedure:


        1. All doors closed

        2. All doors locked

        3. Electrical key transmitter sub-assembly switch pressed

        		 Below 1 V → 10 to 16 V → Below 1 V

    2. except 12 Pin Type:


      1. A01FJ2HE03
        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
        T33-3 (DATA) - T33-6 (GND)

        Procedure:


        1. All doors closed

        2. All doors locked

        3. Electrical key transmitter sub-assembly switch pressed

        		 Below 1 V → 10 to 16 V → Below 1 V

    NG

    REPLACE DOOR CONTROL RECEIVER Click here

    OK

  17. INSPECT WINDOW GLASS ANTENNA WIRE


    1. Inspect window glass antenna wire Click here.


    NG

    REPAIR WINDOW GLASS ANTENNA WIRE Click here

    OK

  18. CHECK HARNESS AND CONNECTOR (DOOR CONTROL RECEIVER - AMPLIFIER ANTENNA ASSEMBLY)


    1. for 12 Pin Type:


      1. Disconnect the T51 door control receiver connector.

      2. Disconnect the T52 amplifier antenna assembly connector.

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        T51-1 (ANT) - T52-1 Always Below 1 Ω
        T51-1 (ANT) or T52-1 - Body ground Always 10 kΩ or higher

    2. except 12 Pin Type:


      1. Disconnect the T33 door control receiver connector.

      2. Disconnect the T52 amplifier antenna assembly connector.

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        T33-7 (ANT) - T52-1 Always Below 1 Ω
        T33-7 (ANT) or T52-1 - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  19. CHECK AMPLIFIER ANTENNA ASSEMBLY


    1. Temporarily replace the amplifier antenna assembly with a new or known good one Click here.

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

      OK
      Wireless door lock functions operate normally.

    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) Click here

    OK

    END (AMPLIFIER ANTENNA ASSEMBLY WAS DEFECTIVE)

  20. 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

  21. 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)