ENTRY AND START SYSTEM (for Entry Function) Rear Door LH Entry Unlock Function does not Operate

DESCRIPTION

If the entry unlock function does not operate for the rear door LH only, but the entry lock function operates, the request code is being transmitted properly from the rear door LH. In this case, there may be a problem related to the touch sensor (connection between the certification ECU [smart key ECU assembly] and rear door outside handle assembly LH [for rear door LH] [unlock sensor]).

WIRING DIAGRAM

A01FQBKE49
A01FQBKE52

INSPECTION PROCEDURE

Note


  • The entry and start system (for Entry Function) uses a multiplex communication system (LIN communication system) and the CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting Click here. Troubleshoot the entry and start system (for Entry Function) after confirming that the communication systems are functioning properly.

  • When using the GTS with the power switch off to troubleshoot:

    Connect the GTS to the DLC3 and turn a courtesy light switch on and off at 1.5-second intervals until communication between the GTS and vehicle begins.

  • Check that there are no electrical key transmitter sub-assemblies in the vehicle.

  • Before performing the inspection, check that DTC B1242 (wireless door lock control) is not output Click here.

  • Before replacing the certification ECU (smart key ECU assembly), refer to the entry and start system (for Entry Function) precaution Click here.

  • After repair, confirm that no DTCs are output by performing the "DTC Output Confirmation Operation".

PROCEDURE


  1. CHECK POWER DOOR LOCK CONTROL SYSTEM


    1. When the door control switch on the multiplex network master switch assembly is operated, check that the doors unlock and lock according to the switch operation Click here.

      OK
      Door locks operate normally.

    NG

    GO TO POWER DOOR LOCK CONTROL SYSTEM Click here

    OK

  2. READ VALUE USING GTS (UNLOCK DETECTION SWITCH)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Main Body / Data List.

    5. Read the Data List according to the display on the GTS.

      Main Body
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      RL-Door Lock Pos SW Rear door RH and LH unlock detection switch signal / ON or OFF

      ON: Rear door RH or LH unlocked

      OFF: Rear door RH and LH locked

      		 -

    NG

    GO TO LIGHTING SYSTEM (Proceed to Door Unlock Detection Switch Circuit) Click here

    OK

  3. READ VALUE USING GTS (UNLOCK SENSOR)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Entry & Start / Data List.

    5. Turn the GTS on.

      Entry & Start (for LHD)
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Dr-Door Touch Sensor Rear door LH touch sensor (unlock sensor) / ON or OFF

      ON: Rear door LH touch sensor (unlock sensor) touched

      OFF: Rear door LH touch sensor (unlock sensor) not touched

      • Displays whether the unlock sensor is on or off (even if the sensor is touched and contact is maintained, "ON" is displayed only momentarily).

      • Use this Data List item to help determine if there is an unlock sensor malfunction when the entry unlock function does not operate.
      Entry & Start (for RHD)
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Pr-Door Touch Sensor Rear door LH touch sensor (unlock sensor) / ON or OFF

      ON: Rear door LH touch sensor (unlock sensor) touched

      OFF: Rear door LH touch sensor (unlock sensor) not touched

      • Displays whether the unlock sensor is on or off (even if the sensor is touched and contact is maintained, "ON" is displayed only momentarily).

      • Use this Data List item to help determine if there is an unlock sensor malfunction when the entry unlock function does not operate.
      OK
      The GTS display changes correctly in response to the operation of the rear door outside handle assembly LH (for rear door LH).

    NG

    CHECK HARNESS AND CONNECTOR (REAR DOOR OUTSIDE HANDLE ASSEMBLY LH - CERTIFICATION ECU AND BODY GROUND) Click here

    OK

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

  4. CHECK HARNESS AND CONNECTOR (REAR DOOR OUTSIDE HANDLE ASSEMBLY LH - CERTIFICATION ECU AND BODY GROUND)


    1. Disconnect the R11 rear door outside handle assembly LH (for rear door LH) connector.

    2. Disconnect the N94 and N98 certification ECU (smart key ECU assembly) connectors.

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      R11-4 (SENS) - N98-12 (SEN3) Always Below 1 Ω
      N94-1 (E) - Body ground Always Below 1 Ω
      R11-4 (SENS) or N98-12 (SEN3) - Body ground Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      R11-4 (SENS) - N98-13 (SEN4) Always Below 1 Ω
      N94-1 (E) - Body ground Always Below 1 Ω
      R11-4 (SENS) or N98-13 (SEN4) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. CHECK REAR DOOR OUTSIDE HANDLE ASSEMBLY LH (FOR REAR DOOR LH) (REAR LH DOOR UNLOCK SENSOR SIGNAL INPUT)


    1. Connect the R11 rear door outside handle assembly LH (for rear door LH) connector.

      A01FST8E25
      Text in Illustration
      *A for LHD *B for RHD
      *1 Waveform - -
      *a

      Component with harness connected

      (Certification ECU [Smart Key ECU Assembly])

      		 *b In actuality, sampling is being performed

    2. Connect the N98 certification ECU (smart key ECU assembly) connector.

    3. Using an oscilloscope, check the waveform.

      OK
      Tester Connection Switch Condition Tool Setting Specified Condition

      • N98-12 (SEN3) - N94-1 (E)*1

      • N98-13 (SEN4) - N94-1 (E)*2

      Procedure:


      1. Power switch off

      2. Electrical key transmitter sub-assembly brought outside vehicle

      3. All doors locked

      4. Electrical key transmitter sub-assembly not sufficiently close to vehicle

      5. Rear door LH unlock sensor not touched → touched

      		 2 V/DIV., 500 ms/DIV. Pulse generation (See waveform)

      • *1: for LHD

      • *2: for RHD


    NG

    REPLACE REAR DOOR OUTSIDE HANDLE ASSEMBLY LH (FOR REAR DOOR LH) Click here

    OK

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)