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

A01IOOTE03

INSPECTION PROCEDURE

Note

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

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 buzzer operation 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

    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

    NG

    REPLACE TRANSMITTER BATTERY Click here

    OK

    REPLACE DOOR CONTROL TRANSMITTER

  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.


    NG

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

    OK

    FIND CAUSE OF ELECTRICAL NOISE AND REMOVE IT

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


    1. A01IQM5E02
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Main Body ECU)
      *2

      Front view of wire harness connector

      (to Door Control Receiver)

      Disconnect the H81 ECU connector.

    2. Disconnect the O14 receiver connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H81-5 (RDA) - O14-2 (RDA) Always Below 1 Ω
      H81-6 (PRG) - O14-3 (PRG)
      H81-5 (RDA) or O14-2 (RDA) - Body ground Always 10 kΩ or higher
      H81-6 (PRG) or O14-3 (PRG) - Body ground

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. A01IP22E02
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Door Control Receiver)

      Disconnect the O14 receiver connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      O14-1 (GND) - Body ground Always Below 1 Ω
      Standard Voltage
      Tester Connection Condition Specified Condition
      O14-5 (+B) - Body ground Always 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  8. CHECK DOOR CONTROL RECEIVER (OUTPUT)


    1. A01INF9E05

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

      Standard Voltage
      Tester Connection Tool Setting Switch Condition Specified Condition
      O14-2 (RDA) - Body ground 10 V/DIV., 50 μsec./DIV. No key in ignition key cylinder, all doors closed and transmitter switch off → on Pulse generation
      OK
      Door control receiver outputs a pulse.

    NG

    REPLACE DOOR CONTROL RECEIVER Click here

    OK

    REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)