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WIRELESS DOOR LOCK CONTROL SYSTEM (w/o Entry and Start System) Only Wireless Control Function is Inoperative

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DTC Code DTC Name
  Only Wireless Control Function is Inoperative
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DESCRIPTION

The door control receiver receives signals from the transmitter and sends these signals to the main body ECU. The main body ECU then controls all the doors by sending lock/unlock signals to each door.

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WIRING DIAGRAM

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INSPECTION PROCEDURE

Note:

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

  • When replacing the door control receiver, refer to the registration procedures (Click here).

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PROCEDURE


  1. Click here

    CHECK POWER DOOR LOCK OPERATION


    1. Check the power door lock operation (Click here).

      OK
      Each door locks and unlocks normally.

  2. Click here

    CHECK KEY REMINDER WARNING OPERATION


    1. Check the key reminder warning buzzer operation (Click here).

      Tip:

      If the key reminder warning buzzer is functioning normally, it can be assumed that the unlock warning switch is also functioning normally.

      OK
      Key reminder warning buzzer operates normally.

  3. Click here

    CHECK WIRELESS DOOR CONTROL TRANSMITTER


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

      OK
      Wireless door lock control functions operate normally.

  4. Click here

    CHECK TRANSMITTER BATTERY


    1. Remove the battery from the inoperative wireless door control transmitter (Click here).

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      Battery positive (+) - Battery negative (-) Always 2.5 to 3.2 V

  5. Click here

    CHECK FOR ELECTRICAL NOISE


    1. Move the transmitter in the vicinity of the door control receiver.

      Tip:

      Refer to Parts Location for the location of the door control receiver (Click here).

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

      OK
      Wireless door lock control functions operate normally.
      Tip:

      • Check if electrical noise is the cause by moving the door control transmitter closer to the door control receiver. Moving closer will decrease the effects of electrical noise.

      • If the operation check can be performed normally, there is a high probability that electrical noise or a decrease in output from the door control transmitter 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.


  6. Click here

    CHECK HARNESS AND CONNECTOR (DOOR CONTROL RECEIVER - MAIN BODY ECU)


    1. Disconnect the L47 receiver connector.

    2. Disconnect the E2 main body ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      L47-2 (RDA) - E2-12 (RDA) Always Below 1 Ω
      L47-3 (PRG) - E2-10 (PRG) Always Below 1 Ω
      L47-2 (RDA) - Body ground Always 10 kΩ or higher
      L47-3 (PRG) - Body ground Always 10 kΩ or higher

  7. Click here

    CHECK HARNESS AND CONNECTOR (DOOR CONTROL RECEIVER - BATTERY AND BODY GROUND)


    1. A0158IDE13

      Disconnect the L47 receiver connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      L47-1 (GND) - 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
      L47-5 (+B) - Body ground Always 11 to 14 V
      Table 1. Text in Illustration
      *a

      Front view of wire harness connector

      (to Door Control Receiver)

  8. Click here

    CHECK DOOR CONTROL RECEIVER (OUTPUT)


    1. A0158ONE09

      Using an oscilloscope, check the waveform.

      Table 2. Measurement Condition
      Item Content
      Tester Connection L47-2 (RDA) - Body ground
      Tool Setting 10 V/DIV., 50 μs/DIV.
      Condition No key in ignition key cylinder, all doors closed and transmitter switch off → on
      OK
      Waveform is output normally (refer to illustration).

  9. Click here

    REPLACE MAIN BODY ECU (COWL SIDE JUNCTION BLOCK LH)

  10. Click here

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  11. Click here

    REPLACE DOOR CONTROL TRANSMITTER

  12. Click here

    REPLACE TRANSMITTER BATTERYClick here

  13. Click here

    FIND CAUSE OF ELECTRICAL NOISE AND REMOVE IT

  14. Click here

    Go to POWER DOOR LOCK CONTROL SYSTEMClick here

  15. Click here

    Go to KEY REMINDER WARNING SYSTEMClick here

  16. Click here

    REPLACE DOOR CONTROL RECEIVERClick here