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

A01KROVE02

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 key reminder warning 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 control) 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. Measure 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.

      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 and check for DTCs.


      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 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 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.


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

        Click here

        Note

        When replacing the transmitter battery, before starting work, remove static electricity that has built up in the body by touching, for example, the vehicle to prevent the electrical key transmitter sub-assembly from being damaged.

      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.

        A01KT32

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

        Note

        When replacing the transmitter battery, before starting work, remove static electricity that has built up in the body by touching, for example, the vehicle to prevent the electrical key transmitter sub-assembly from being damaged.

      4. 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 key is at room temperature.

        • The key 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

        A01KRY4
        Standard Voltage
        Tester Connection Condition Specified Condition
        Transmitter battery positive (+) - Transmitter battery negative (-) Power switch off, all doors closed and lock or unlock switch is pressed 2.3 to 3.2 V
      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. 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 status ON or OFF

      ON: Power switch on (ACC)

      OFF: Power switch off

      		 -
      IG SW Power switch status ON or OFF

      ON: Power switch to on (IG)

      OFF: Power switch off

      		 -

      Body Electrical > Main Body > Data List
      Tester Display
      ACC SW
      IG SW
      Result
      Proceed to
      OK
      NG

    NG

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

    OK

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


    1. A01KTGLC01
      *a Front view of wire harness connector (to Certification ECU (Smart Key ECU Assembly))

      Disconnect the E33 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
      E33-11 (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
      E33-10 (CUTB) - Body ground Power switch off 11 to 14 V
      E33-2 (+B) - Body ground Power switch off 11 to 14 V
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. Disconnect the E34 certification ECU (smart key ECU assembly) connector.

    2. Disconnect the L35 door control receiver connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      E34-5 (RCO) - L35-4 (+5) Always Below 1 Ω
      E34-17 (RDAM) - L35-5 (DATA) Always Below 1 Ω
      E34-6 (CSEL) - L35-2 (CSEL) Always Below 1 Ω
      E34-5 (RCO) - Body ground Always 10 kΩ or higher
      L35-4 (+5) - Body ground Always 10 kΩ or higher
      E34-17 (RDAM) - Body ground Always 10 kΩ or higher
      L35-5 (DATA) - Body ground Always 10 kΩ or higher
      E34-6 (CSEL) - Body ground Always 10 kΩ or higher
      L35-2 (CSEL) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  13. INSPECT DOOR CONTROL RECEIVER


    1. A01KS7TC26
      *a

      Component with harness connected

      (Door Control Receiver)

      Reconnect the L35 door control receiver connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      L35-1 (GND) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE DOOR CONTROL RECEIVER for Hatchback: Click here
    REPLACE DOOR CONTROL RECEIVER for Wagon: Click here

    OK

  14. INSPECT CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)


    1. Reconnect the E33 and E34 certification ECU (smart key ECU assembly) connectors.

    2. A01KS7TC55
      *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
      L35-4 (+5) - L35-1 (GND) Power switch off, all doors closed and electrical key transmitter sub-assembly switch not pressed → electrical key transmitter sub-assembly switch pressed Below 1 V → 4.5 to 5.5 V
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    OK

  15. INSPECT DOOR CONTROL RECEIVER


    1. A01KS7TC32
      *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
      L35-5 (DATA) - L35-1 (GND) Power switch off, all doors closed, all doors locked and electrical key transmitter sub-assembly switch not pressed → electrical key transmitter sub-assembly switch pressed Below 1 V → 10 to 16 V → Below 1 V
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE DOOR CONTROL RECEIVER for Hatchback: Click here
    REPLACE DOOR CONTROL RECEIVER for Wagon: Click here

    OK

  16. 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

  17. 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) for LHD: Click here
    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) for RHD: Click here