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

A01X1ICE04
*a IMB
*b from Battery
*c Main Body ECU (Cowl Side Junction Block LH)
*d Door Control Receiver

CAUTION / NOTICE / HINT

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.

PROCEDURE


  1. CHECK POWER DOOR LOCK OPERATION


    1. Check the power door lock operation Click here.

      OK
      Each door locks and unlocks normally.

    NG

    Go to POWER DOOR LOCK CONTROL SYSTEM Click here

    OK

  2. CHECK KEY REMINDER WARNING OPERATION


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

      Tech Tips

      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.

    NG

    Go to KEY REMINDER WARNING SYSTEM Click here

    OK

  3. 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.

    NG

    CHECK FOR ELECTRICAL NOISE Click here

    OK

  4. 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

    OK

    REPLACE DOOR CONTROL TRANSMITTER

    NG

    REPLACE TRANSMITTER BATTERY Click here

  5. CHECK FOR ELECTRICAL NOISE


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

      Tech Tips

      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.

      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

    FIND CAUSE OF ELECTRICAL NOISE AND REMOVE IT

    NG

  6. 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

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. A01X5DOE02
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Door Control Receiver)

      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

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  8. CHECK DOOR CONTROL RECEIVER (OUTPUT)


    1. Using an oscilloscope, check the waveform.

      A01X6EAE01
      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).

    OK

    REPLACE MAIN BODY ECU (COWL SIDE JUNCTION BLOCK LH)

    NG

    REPLACE DOOR CONTROL RECEIVER Click here