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

Refer to B1242.

Click here

CAUTION / NOTICE / HINT

Note


  • 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.

  • The wireless door lock control system uses the CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Troubleshoot the wireless door lock control system after confirming that the communication systems are functioning properly.

    Click here

  • Before replacing the certification ECU (smart key ECU assembly) or electrical key transmitter sub-assembly, refer to Service Bulletin.

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

  • Before performing the inspection, check that DTC B1242 (wireless door lock tuner circuit malfunction) is not output

    Click here

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

  • After repair, confirm DTC does not reoccur by performing the "DTC Output Confirmation Operation".

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

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 to the next step.

      Result
      Proceed to
      NEXT

    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 to the DLC3.

    3. Turn the engine switch on (IG).

    4. Turn the GTS on.

    5. Enter the following menus: Body Electrical / Entry&Start / Trouble Codes.


      Body Electrical > Entry&Start > Trouble Codes

      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.
      Result
      Proceed to
      OK
      NG

    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 power window regulator master switch assembly on the driver door is operated, check that the doors unlock and lock according to the door control switch operation.

      Click here

      OK
      Door locks operate normally.
      Result
      Proceed to
      OK
      NG

    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

    GO TO STEP 6 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.

      Result
      Proceed to
      NEXT

    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
      Wireless door lock functions operate normally.
      Result
      Proceed to
      OK
      NG

    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.

        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.

      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

    B

    REPLACE ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY

    C

    REPLACE TRANSMITTER BATTERY Click here

    A

  8. INSPECT TRANSMITTER BATTERY (VOLTAGE)


    1. Inspect the transmitter battery.

      Click here

      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.

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY

    NG

    REPLACE TRANSMITTER BATTERY Click here

  9. CHECK WAVE ENVIRONMENT


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

      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 radio 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 function operate normally.
      Result
      Proceed to
      OK
      NG

    OK

    AFFECTED BY WAVE INTERFERENCE

    NG

  10. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)


    1. Measure the voltage while checking the Data List on the 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 / Power Source Control / Data List.

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

        B002DJZC83
        *a

        Component with harness connected

        (Certification ECU (Smart Key ECU Assembly))

        		 - -

        Body Electrical > Power Source Control > Data List
        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)

        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).

        Body Electrical > Power Source Control > Data List
        Tester Display
        Power Supply Condition
        Standard Voltage
        Tester Connection Switch Condition Specified Condition
        K74-6 (IG1D) - Body ground Engine switch off Below 1 V
        Engine switch on (ACC)
        Engine switch on (IG) 9 V or higher
        A21-9 (IG2D) - Body ground Engine switch off Below 1 V
        Engine switch on (ACC)
        Engine switch on (IG) 9 V or higher
        K74-4 (ACCD) - Body ground Engine switch off Below 1 V
        Engine switch on (ACC) 9 V or higher
        Engine switch on (IG)

        Tech Tips

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

      Result
      Proceed to
      OK
      NG

    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.


      Body Electrical > Main Body > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      ACC SW Engine switch on (ACC) signal ON or OFF

      ON: Engine switch on (ACC)

      OFF: Engine switch off

      		 -
      IG SW Engine switch on (IG) signal ON or OFF

      ON: Engine switch on (IG)

      OFF: Engine switch off or on (ACC)

      		 -

      Body Electrical > Main Body > Data List
      Tester Display
      ACC SW
      IG SW

      Tech Tips

      If the certification ECU (smart key ECU assembly) misjudges for any reason that the engine switch is on (IG) even though the engine switch is off, the entry lock and unlock functions stop.

      Result
      Result Proceed to
      The certification ECU (smart key ECU assembly) judges properly that the power source is off when the engine switch is off A
      The main body ECU (multiplex network body ECU)does not judge properly that the power source is off when the engine switch is off B

    B

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

    A

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


    1. B002D0OC16
      *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
      A21-11 (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
      A21-10 (CUTB) - Body ground Always 11 to 14 V
      A21-2 (+B) - Body ground Always 11 to 14 V
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. for LHD


      1. Disconnect the T1 certification ECU (smart key ECU assembly) connector.

      2. Disconnect the T27*1 or T26*2 door control receiver connector.

        *1: w/ Tire Pressure Warning System

        *2: w/o Tire Pressure Warning System

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

        Standard Resistance
        w/ Tire Pressure Warning System
        Tester Connection Condition Specified Condition
        T1-5 (RCO) - T27-10 (+5) Always Below 1 Ω
        T1-17 (RDAM) - T27-9 (DATA) Always Below 1 Ω
        T1-6 (CSEL) - T27-6 (CSEL) Always Below 1 Ω
        T1-5 (RCO) or T27-10 (+5) - Body ground Always 10 kΩ or higher
        T1-17 (RDAM) or T27-9 (DATA) - Body ground Always 10 kΩ or higher
        T1-6 (CSEL) or T27-6 (CSEL) - Body ground Always 10 kΩ or higher
        w/o Tire Pressure Warning System
        Tester Connection Condition Specified Condition
        T1-5 (RCO) - T26-2 (+5) Always Below 1 Ω
        T1-17 (RDAM) - T26-3 (DATA) Always Below 1 Ω
        T1-6 (CSEL) - T26-5 (CSEL) Always Below 1 Ω
        T1-5 (RCO) or T26-2 (+5) - Body ground Always 10 kΩ or higher
        T1-17 (RDAM) or T26-3 (DATA) - Body ground Always 10 kΩ or higher
        T1-6 (CSEL) or T26-5 (CSEL) - Body ground Always 10 kΩ or higher

    2. for RHD


      1. Disconnect the U1 certification ECU (smart key ECU assembly) connector.

      2. Disconnect the T27*1 or T26*2 door control receiver connector.

        *1: w/ Tire Pressure Warning System

        *2: w/o Tire Pressure Warning System

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

        Standard Resistance
        w/ Tire Pressure Warning System
        Tester Connection Condition Specified Condition
        U1-5 (RCO) - T27-10 (+5) Always Below 1 Ω
        U1-17 (RDAM) - T27-9 (DATA) Always Below 1 Ω
        U1-6 (CSEL) - T27-6 (CSEL) Always Below 1 Ω
        U1-5 (RCO) or T27-10 (+5) - Body ground Always 10 kΩ or higher
        U1-17 (RDAM) or T27-9 (DATA) - Body ground Always 10 kΩ or higher
        U1-6 (CSEL) or T27-6 (CSEL) - Body ground Always 10 kΩ or higher
        w/o Tire Pressure Warning System
        Tester Connection Condition Specified Condition
        U1-5 (RCO) - T26-2 (+5) Always Below 1 Ω
        U1-17 (RDAM) - T26-3 (DATA) Always Below 1 Ω
        U1-6 (CSEL) - T26-5 (CSEL) Always Below 1 Ω
        U1-5 (RCO) or T26-2 (+5) - Body ground Always 10 kΩ or higher
        U1-17 (RDAM) or T26-3 (DATA) - Body ground Always 10 kΩ or higher
        U1-6 (CSEL) or T26-5 (CSEL) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  14. CHECK DOOR CONTROL RECEIVER


    1. B002CJ1C01
      *A w/ Tire Pressure Warning System
      *B w/o Tire Pressure Warning System
      *a

      Component with harness connected

      (Door Control Receiver)

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

      Standard Resistance
      w/ Tire Pressure Warning System
      Tester Connection Condition Specified Condition
      T27-12 (GND) - Body ground Always Below 1 Ω
      Standard Resistance
      w/o Tire Pressure Warning System
      Tester Connection Condition Specified Condition
      T26-6 (GND) - Body ground Always Below 1 Ω
      Result
      Result Proceed to
      OK A
      NG (w/ Tire Pressure Warning System) B
      NG (w/o Tire Pressure Warning System) C

    B

    REPLACE ELECTRICAL KEY AND TPMS RECEIVER ASSEMBLY Click here

    C

    REPLACE SMART DOOR CONTROL RECEIVER ASSEMBLY Click here

    A

  15. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)


    1. B002CJ1C02
      *A w/ Tire Pressure Warning System
      *B w/o Tire Pressure Warning System
      *a

      Component with harness connected

      (Door Control Receiver)

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

      Standard Voltage
      w/ Tire Pressure Warning System
      Tester Connection Condition Specified Condition
      T27-10 (+5) - T27-12(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
      T27-6 (CSEL) - T27-12 (GND) Engine switch off and all doors closed Below 1 V → 4.4 to 6.5 V → Below 1 V
      T27-1 (IG) - T27-12 (GND) Engine switch on (IG) 10 to 16 V
      w/o Tire Pressure Warning System
      Tester Connection Condition Specified Condition
      T26-2 (+5) - T26-6 (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
      T26-5 (CSEL) - T26-6 (GND) Engine switch off and all doors closed Below 1 V → 4.4 to 6.5 V → Below 1 V
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    OK

  16. CHECK DOOR CONTROL RECEIVER


    1. B002CJ1C03
      *A w/ Tire Pressure Warning System
      *B w/o Tire Pressure Warning System
      *a

      Component with harness connected

      (Door Control Receiver)

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

      Standard Resistance
      w/ Tire Pressure Warning System
      Tester Connection Condition Specified Condition
      T27-9 (DATA) - T27-12 (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
      Standard Resistance
      w/o Tire Pressure Warning System
      Tester Connection Condition Specified Condition
      T26-3 (DATA) - T26-6 (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
      Result
      Result Proceed to
      OK A
      NG (w/ Tire Pressure Warning System) B
      NG (w/o Tire Pressure Warning System) C

    B

    REPLACE ELECTRICAL KEY AND TPMS RECEIVER ASSEMBLY Click here

    C

    REPLACE SMART DOOR CONTROL RECEIVER ASSEMBLY Click here

    A

  17. INSPECT WINDOW GLASS ANTENNA WIRE


    1. Inspect window glass antenna wire.

      Result
      Proceed to
      OK
      NG

    NG

    REPAIR WINDOW GLASS ANTENNA WIRE

    OK

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


    1. Disconnect the T42*1 or T26*2 door control receiver connector.

      *1: w/ Tire Pressure Warning System

      *2: w/o Tire Pressure Warning System

    2. Disconnect the T43*1 or T44*2 amplifier antenna assembly

      *1: w/ Tire Pressure Warning System

      *2: w/o Tire Pressure Warning System

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

      Standard Resistance
      w/ Tire Pressure Warning System
      Tester Connection Condition Specified Condition
      T42-1 - T43-1 Always Below 1 Ω
      T42-1 or T43-1 - Body ground Always 10 kΩ or higher
      w/o Tire Pressure Warning System
      Tester Connection Condition Specified Condition
      T26-7 - T44-1 Always Below 1 Ω
      T26-7 or T44-1 - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  19. CHECK NO.1 AMPLIFIER ANTENNA ASSEMBLY


    1. Temporarily replace the No. 1 amplifier antenna assembly with a new or known good one.

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

      OK
      Wireless door lock functions operate normally.
      Result
      Proceed to
      OK
      NG

    OK

    END (NO. 1 AMPLIFIER ANTENNA ASSEMBLY WAS DEFECTIVE)

    NG

  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.

      Result
      Proceed to
      NEXT

    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.
      Result
      Proceed to
      OK
      NG

    OK

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

    NG

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