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

A0020N9E06

CAUTION / NOTICE / HINT

Note


  • When using the GTS with the vehicle power 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 inspection 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 AUXILIARY BATTERY VOLTAGE


    1. Check the auxiliary battery voltage with the power switch off.

      Standard voltage
      11 to 14 V

      Tech Tips

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

      If the voltage is below 11 V, recharge or replace the vehicle auxiliary 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 power 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 power 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 multiplex network 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 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 power switch, depressing the brake pedal and pressing the power 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 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 function operate normally.
      Result
      Proceed to
      OK
      NG

    OK

    AFFECTED BY WAVE INTERFERENCE

    NG

  10. CHECK POWER MANAGEMENT CONTROL ECU


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


      1. Connect the GTS to the DLC3.

      2. Turn the power switch on (IG).

      3. Turn the GTS on.

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

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

        A0020MKC12
        *a

        Component with harness connected

        (Power Management Control ECU)

        		 - -

        Body Electrical > Power Source Control > Data List
        Tester Display Measurement Item Range Normal Condition Diagnostic Note
        Power Supply Condition Power supply state All OFF, ACC ON, IG ON or ST ON

        All OFF: Power switch off (ACC and IG)

        ACC ON: Power switch on (ACC)

        IG ON: Power switch on (IG)

        ST ON: Sending hybrid control system start request signal

        		 -

        Body Electrical > Power Source Control > Data List
        Tester Display
        Power Supply Condition
        Standard Voltage
        Tester Connection Condition Specified Condition
        K33-2 (IG1D) - Body ground Power switch off Below 1 V
        Power switch on (ACC) Below 1 V
        Power switch on (IG) 9 V or higher
        K33-1 (ACCD) - Body ground Power switch off Below 1 V
        Power switch on (ACC) 8.5 V or higher
        Power switch on (IG) 8.5 V or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE POWER MANAGEMENT CONTROL ECU

    OK

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


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / 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 Power switch on (ACC) signal ON or OFF

      ON: Power switch on (ACC)

      OFF: Power switch off

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

      ON: Power switch on (IG)

      OFF: Power 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 power switch is on (IG) even though the power 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 power switch is off A
      The main body ECU (multiplex network body ECU)does not judge properly that the power source is off when the power 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) - DOOR CONTROL RECEIVER)


    1. Disconnect the K7 certification ECU (smart key ECU assembly) connector.

    2. Disconnect the Q37*1 or Q38*2 door control receiver connector.


      • *1: for 5 Pin Type

      • *2: for 12 Pin Type

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

      Standard Resistance (for 5 Pin Type)
      Tester Connection Condition Specified Condition
      K7-1 (RCO) - Q37-4 (+5) Always Below 1 Ω
      K7-3 (RDAM) - Q37-5 (DATA) Always Below 1 Ω
      K7-2 (CSEL) - Q37-2 (CSEL) Always Below 1 Ω
      K7-1 (RCO) - Body ground Always 10 kΩ or higher
      Q37-4 (+5) - Body ground Always 10 kΩ or higher
      K7-3 (RDAM) - Body ground Always 10 kΩ or higher
      Q37-5 (DATA) - Body ground Always 10 kΩ or higher
      K7-2 (CSEL) - Body ground Always 10 kΩ or higher
      Q37-2 (CSEL) - Body ground Always 10 kΩ or higher
      Standard Resistance (for 12 Pin Type)
      Tester Connection Condition Specified Condition
      K7-1 (RCO) - Q38-10 (+5) Always Below 1 Ω
      K7-3 (RDAM) - Q38-9 (DATA) Always Below 1 Ω
      K7-2 (CSEL) - Q38-6 (CSEL) Always Below 1 Ω
      K7-1 (RCO) - Body ground Always 10 kΩ or higher
      Q38-10 (+5) - Body ground Always 10 kΩ or higher
      K7-3 (RDAM) - Body ground Always 10 kΩ or higher
      Q38-9 (DATA) - Body ground Always 10 kΩ or higher
      K7-2 (CSEL) - Body ground Always 10 kΩ or higher
      Q38-6 (CSEL) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  13. CHECK DOOR CONTROL RECEIVER


    1. A0021IYC02
      *A for 5 Pin Type
      *B for 12 Pin Type
      *a

      Component with harness connected

      (Door Control Receiver)

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

      Standard Resistance (for 5 Pin Type)
      Tester Connection Condition Specified Condition
      Q37-1 (GND) - Body ground Always Below 1 Ω
      Standard Resistance (for 12 Pin Type)
      Tester Connection Condition Specified Condition
      Q38-12 (GND) - Body ground Always Below 1 Ω

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

      Standard Voltage (for 5 Pin Type)
      Tester Connection Condition Specified Condition
      Q37-5 (DATA) - Q37-1 (GND)

      Procedure:


      1. Power switch off

      2. All doors locked

      3. Electrical key transmitter sub-assembly not inside vehicle

      4. Electrical key transmitter sub-assembly brought outside detection area but kept inside wireless function operational area

      5. Lock or unlock switch of electrical key transmitter sub-assembly not pressed → pressed

      		 Pulse generation
      Standard Voltage (for 12 Pin Type)
      Tester Connection Condition Specified Condition
      Q38-9 (DATA) - Q38-12 (GND)

      Procedure:


      1. Power switch off

      2. All doors locked

      3. Electrical key transmitter sub-assembly not inside vehicle

      4. Electrical key transmitter sub-assembly brought outside detection area but kept inside wireless function operational area

      5. Lock or unlock switch of electrical key transmitter sub-assembly not pressed → pressed

      		 Pulse generation
      Result
      Result Proceed to
      OK A
      NG (for 5 Pin Type) B
      NG (for 12 Pin Type) C

    B

    REPLACE DOOR CONTROL RECEIVER Click here

    C

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

    A

  14. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)


    1. A0021IYC03
      *A for 5 Pin Type
      *B for 12 Pin Type
      *a

      Component with harness connected

      (Door Control Receiver)

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

      Standard Voltage(for 5 Pin Type)
      Tester Connection Condition Specified Condition
      Q37-4 (+5) - Q37-1 (GND)

      Procedure:


      1. Power switch off

      2. Electrical key transmitter sub-assembly brought outside detection area but kept inside wireless function operational area

      3. Lock or unlock switch of electrical key transmitter sub-assembly not pressed → pressed

      		 Pulse generation
      Q37-2 (CSEL) - Q37-1 (GND)

      Procedure:


      1. Power switch off

      2. All doors closed

      		 Below 1 V → 4.5 to 6.0 V → Below 1 V
      Standard Voltage(for 12 Pin Type)
      Tester Connection Condition Specified Condition
      Q38-10 (+5) - Q38-12 (GND)

      Procedure:


      1. Power switch off

      2. Electrical key transmitter sub-assembly brought outside detection area but kept inside wireless function operational area

      3. Lock or unlock switch of electrical key transmitter sub-assembly not pressed → pressed

      		 Pulse generation
      Q38-6 (CSEL) - Q38-12 (GND)

      Procedure:


      1. Power switch off

      2. All doors closed

      		 Below 1 V → 4.5 to 6.0 V → Below 1 V
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    OK

  15. 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 Service Bulletin.

      Result
      Proceed to
      NEXT

    NEXT

  16. 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