WIRELESS DOOR LOCK CONTROL SYSTEM (for Built-in Type Door Control Receiver) Only Wireless Control Function is Inoperative

DESCRIPTION

The theft warning ECU assembly receives a signal from the transmitter. The theft warning ECU assembly then control all doors by sending all of the following: 1) lock/unlock signals to each door, 2) hazard flasher assembly signals to the turn signal flasher assembly (hazard warning lights), 3) security horn signals to the security horn assembly*.

Tech Tips

*: The security horn applies only if the wireless answer-back function has been customized so that the hazard warning lights flash and the security horn sounds.

WIRING DIAGRAM

A01DVL7E01

INSPECTION PROCEDURE

Note


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

  • When replacing the theft warning ECU assembly or door control transmitter sub-assembly, refer to the registration procedures Click here.

PROCEDURE


  1. CHECK POWER DOOR LOCK OPERATION


    1. Check the power door lock operation.


      OK
      Each door locks and unlocks normally.
      Result
      Result Proceed to
      OK A
      NG (except 2 Step Unlock Function) B
      NG (for 2 Step Unlock Function) C

    B

    Go to POWER DOOR LOCK CONTROL SYSTEM Click here

    C

    Go to POWER DOOR LOCK CONTROL SYSTEM Click here

    A

  2. CHECK DOOR CONTROL TRANSMITTER ASSEMBLY


    1. Check whether the wireless door lock control functions operate normally with another registered door control transmitter assembly.

      OK
      Wireless door lock control functions operate normally.

    NG

    CHECK FOR ELECTRICAL NOISE Click here

    OK

  3. CHECK DOOR CONTROL TRANSMITTER ASSEMBLY (LED)


    1. Press and hold the lock switch of the door control transmitter assembly 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 third time C

    B

    REPLACE DOOR CONTROL TRANSMITTER SUB-ASSEMBLY

    C

    REPLACE TRANSMITTER BATTERY Click here

    A

  4. INSPECT TRANSMITTER BATTERY


    1. A01DYT8

      Remove the transmitter battery from the door control transmitter assembly that does not operate Click here.

    2. Attach a lead wire (0.6mm [0.0236 in.] in diameter or less including wire sheath) with tape or equivalent to the negative battery.

      Note

      Do not wrap the lead wire around a terminal, wedge it between the terminals or solder it. A terminal may be deformed or damaged, and the transmitter battery will not be able to be installed correctly.

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

      Note

      When replacing the transmitter battery, before staring work, remove any static electricity that has built up by touching, for example, the vehicle to prevent the door control transmitter sub-assembly from being damaged.

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

      Tech Tips


      • Measure the transmitter battery voltage while pressing the lock or unlock switch on the transmitter.

      • Perform the measurement when the door control transmitter assembly is at room temperature.

      Standard Voltage
      Tester Connection Condition Specified Condition
      Battery positive (+) - Battery negative (-) Ignition switch off, all doors closed and lock or unlock switch pushed 2.2 to 3.2 V

    NG

    REPLACE TRANSMITTER BATTERY Click here

    OK

    REPLACE DOOR CONTROL TRANSMITTER SUB-ASSEMBLY

  5. CHECK FOR ELECTRICAL NOISE

    Tech Tips

    Use the following standardized test procedure to check the transmitter again.


    1. Move the door control transmitter assembly in the vicinity of the theft warning ECU assembly.

      Tech Tips

      Refer to Parts Location for the location of the theft warning ECU assembly Click here.

    2. Press and hold either the lock or unlock transmitter switch for 1 second and check that the doors lock or unlock accordingly.

      OK
      Wireless door lock control functions operate normally..

      Tech Tips


      • Check if electrical noise is the cause by moving the door control transmitter assembly closer to the theft warning ECU assembly. Moving it closer will decrease the effects of electrical noise.

      • If the operation check can be performed normally, there is a high probability the electrical noise or decrease in output from the door control transmitter assembly is the cause of the malfunction. There is a high probability that electrical noise is the cause if the problem occurs only in a certain location or only during a certain time of day. Also, custom components may be causing electrical noise. If custom components are installed in the vehicle, remove them and perform the operation check again.


    NG

    REGISTER RECOGNITION CODE Click here

    OK

    FIND CAUSE OF NOISE AND REMOVE IT

  6. REGISTER RECOGNITION CODE


    1. Check that the system can be switched to rewrite mode or add mode, and that a recognition code can be registered Click here.

      OK
      Recognition code can be registered.

    NG

    INSPECT UNLOCK WARNING SWITCH ASSEMBLY Click here

    OK

    END (REGISTRATION IS DEFECTIVE)

  7. INSPECT UNLOCK WARNING SWITCH ASSEMBLY


    1. Remove the unlock warning switch assembly.

    2. A01DXBRE01
      Text in Illustration
      *a Pushed
      *b Not pushed

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

      Standard resistance
      Tester Connection Switch Condition Specified Condition
      1 - 2 Not pushed 10 kΩ or higher
      Pushed Below 1 Ω

    NG

    REPLACE UNLOCK WARNING SWITCH ASSEMBLY

    OK

  8. CHECK HARNESS AND CONNECTOR (UNLOCK WARNING SWITCH - THEFT WARNING ECU AND BODY GROUND)


    1. Disconnect the U1 unlock warning switch assembly connector.

    2. Disconnect the T36*1 or T39*2 theft warning ECU assembly connector.


      • *1: except 2 Step Unlock Function

      • *2: for 2 Step Unlock Function

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

      Standard Resistance
      except 2 Step Unlock Function
      Tester Connection Condition Specified Condition
      U1-1 - T36-5 (KSW) Always Below 1 Ω
      U1-2 - Body ground Always Below 1 Ω
      for 2 Step Unlock Function
      Tester Connection Condition Specified Condition
      U1-1 - T39-5 (KSW) Always Below 1 Ω
      U1-2 - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  9. CHECK HARNESS AND CONNECTOR (THEFT WARNING ECU - DRIVER SIDE JUNCTION BLOCK)


    1. Disconnect the T36*1 or T39*2 theft warning ECU assembly connector.


      • *1: except 2 Step Unlock Function

      • *2: for 2 Step Unlock Function

    2. Disconnect the 2A and 2D driver side junction block assembly connectors.

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

      Standard Resistance
      except 2 Step Unlock Function
      Tester Connection Condition Specified Condition
      T36-25 (L2) - 2A-4 (L1) Always Below 1 Ω
      T39-26 (UL3) - 2D-4 (UL1) Always Below 1 Ω
      for 2 Step Unlock Function
      Tester Connection Condition Specified Condition
      T39-20 (L2) - 2A-4 (L1) Always Below 1 Ω
      T39-21 (UL3) - 2D-4 (UL1) Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  10. CHECK HARNESS AND CONNECTOR (THEFT WARNING ECU - BATTERY AND BODY GROUND)


    1. A01DV10E02
      Text in Illustration
      *A except 2 Step Unlock Function
      *B for 2 Step Unlock Function
      *a

      Front view of wire harness connector

      (to Theft Warning ECU Assembly)

      Disconnect the T36*1 or T39*2 theft warning ECU assembly connector.


      • *1: except 2 Step Unlock Function

      • *2: for 2 Step Unlock Function

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

      Standard Resistance
      except 2 Step Unlock Function
      Tester Connection Condition Specified Condition
      T36-1 (E) - Body ground Always Below 1 Ω
      for 2 Step Unlock Function
      Tester Connection Condition Specified Condition
      T39-1 (E) - Body ground Always Below 1 Ω

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

      Standard Voltage
      except 2 Step Unlock Function
      Tester Connection Condition Specified Condition
      T36-4 (+B1) - Body ground Always 11 to 14 V
      T36-14 (+B2) - Body ground Always 11 to 14 V
      for 2 Step Unlock Function
      Tester Connection Condition Specified Condition
      T39-3 (+B1) - Body ground Always 11 to 14 V
      T39-12 (+B2) - Body ground Always 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  11. REPLACE DRIVER SIDE JUNCTION BLOCK ASSEMBLY


    1. Temporarily replace the driver side junction block assembly with a new or normally functioning one.

    2. Check that the wireless door lock control functions Click here.

      OK
      Wireless door lock control functions operate normally.

    NG

    REPLACE THEFT WARNING ECU ASSEMBLY

    OK

    END (DRIVER SIDE JUNCTION BLOCK IS DEFECTIVE)