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

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.

WIRING DIAGRAM

A004ODXE02
*a from Battery
*b Door Control Receiver
*c Main Body ECU

CAUTION / NOTICE / HINT

Note


  • As the door control battery is installed between the vehicle battery and main body ECU (instrument panel junction block assembly), first perform the inspections in On-Vehicle Inspection to confirm that there are no malfunctions in the power source circuit for the main body ECU (instrument panel junction block assembly) before performing this troubleshooting procedure Click here.

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

PROCEDURE


  1. CHECK POWER DOOR LOCK OPERATION FUNCTION


    1. Check the power door lock operation function Click here.

      OK
      Each door locks and unlocks normally.

    NG
    OK
  2. CHECK KEY REMINDER WARNING OPERATION FUNCTION


    1. Check the key reminder buzzer operation function Click here.

      Tech Tips

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

      OK
      Key reminder buzzer operates normally.

    NG
    OK
  3. CHECK WIRELESS DOOR CONTROL TRANSMITTER


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

      OK
      Wireless door control functions operate normally.

    NG
    OK
  4. CHECK TRANSMITTER BATTERY


    1. Remove the battery from the inoperative wireless door control transmitter.

      Tech Tips


    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
      Result
      Result Proceed to
      OK A
      NG (for Type A) B
      NG (for Type B) C

    A
    B
    C
  5. CHECK ELECTRICAL NOISE


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

      Tech Tips


      • for Sedan: Refer to Parts Location for the location of the door control receiver Click here.

      • for Wagon: 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 control functions operate normally.

      Tech Tips


      • 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.


    OK
    NG
  6. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - DOOR CONTROL RECEIVER)

    A004RKME02
    Text in Illustration
    *1

    Front view of wire harness connector

    (to Main Body ECU [Instrument Panel Junction Block])

    *2

    Front view of wire harness connector

    (to Door Control Receiver)


    1. Disconnect the D81 ECU connector.

    2. Disconnect the H14 receiver connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      D81-5 (RDA) - H14-2 (RDA) Always Below 1 Ω
      D81-6 (PRG) - H14-3 (PRG)
      D81-5 (RDA) or H14-2 (RDA) - Body ground Always 10 kΩ or higher
      D81-6 (PRG) or H14-3 (PRG) - Body ground

    NG
    OK
  7. CHECK HARNESS AND CONNECTOR (DOOR CONTROL RECEIVER - BATTERY AND BODY GROUND)

    A004TR1E02
    Text in Illustration
    *1

    Front view of wire harness connector

    (to Door Control Receiver)


    1. Disconnect the H14 receiver connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H14-1 (GND) - Body ground Always Below 1 Ω
      Standard Voltage
      Tester Connection Condition Specified Condition
      H14-5 (+B) - Body ground Always 11 to 14 V

    NG
    OK
  8. CHECK DOOR CONTROL RECEIVER (OUTPUT)

    A004NO3E01
    RDA Output (Reference)
    *1 Component with harness connected: (Door Control Receiver)
    *2 Transmitter Switch On
    *3 Below 1 V
    *4 50 μsec.

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

      Standard Voltage
      Tester Connection Tool Setting Switch Condition Specified Condition
      H14-2 (RDA) - Body ground 10 V/DIV., 50 μsec./DIV. Transmitter switch on → off (No key in ignition key cylinder, all doors closed) Pulse generation
      OK
      Door control receiver outputs pulse generation.
      Result
      Result Proceed to
      OK A
      NG (for Sedan) B
      NG (for Wagon) C

    A
    B
    C