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

DESCRIPTION

If the rear door LH entry unlock function does not operate but the entry lock function operates, the communication line between the vehicle and electrical key transmitter is normal. The part at fault may be a touch sensor circuit (certification ECU (smart key ECU assembly) → rear door outside handle LH → rear door electrical key oscillator LH).

Tech Tips

For vehicles with entry function for rear doors.

WIRING DIAGRAM

A015DHRE07

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK POWER DOOR LOCK OPERATION


    1. When the master switch assembly door control switch is operated, check that the locked doors unlock.

      OK
      Door locks operate normally.

    NG

    GO TO POWER DOOR LOCK CONTROL SYSTEM Click here

    OK

  2. READ VALUE USING INTELLIGENT TESTER (DOOR LOCK POSITION SWITCH)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the intelligent tester on.

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

    5. Read the Data List according to the display on the intelligent tester.


      1. for LHD

        Main Body
        Tester Display Measurement Item/Range Normal Condition Diagnostic Note
        DR Door Lock Position SW Driver side rear door lock position switch signal / ON or OFF

        ON: Driver side rear door unlocked

        OFF: Driver side rear door locked

        		 -
        OK
        On the intelligent tester screen, the display changes between ON and OFF as shown in the chart above.

      2. for RHD

        Main Body
        Tester Display Measurement Item/Range Normal Condition Diagnostic Note
        PR Door Lock Position SW Passenger side rear door lock position switch signal / ON or OFF

        ON: Passenger side rear door unlocked

        OFF: Passenger side rear door locked

        		 -
        OK
        On the intelligent tester screen, the display changes between ON and OFF as shown in the chart above.

    NG

    GO TO POWER DOOR LOCK CONTROL SYSTEM (Proceed to Only Rear Door LH LOCK/UNLOCK Functions do not Operate) Click here

    OK

  3. READ VALUE USING INTELLIGENT TESTER (TOUCH SENSOR)


    1. Using the intelligent tester, read the Data List.


      1. for LHD

        Entry & Start
        Tester Display Measurement Item/Range Normal Condition Diagnostic Note
        Dr-Door Touch Sensor Driver side rear door touch sensor / ON or OFF

        ON: Touch sensor touched

        OFF: Touch sensor not touched

        		 -
        OK
        "ON" (sensor is touched) and "OFF" (sensor is not touched) appears on the screen.

      2. for RHD

        Entry & Start
        Tester Display Measurement Item/Range Normal Condition Diagnostic Note
        Pr-Door Touch Sensor Passenger side rear door touch sensor / ON or OFF

        ON: Touch sensor touched

        OFF: Touch sensor not touched

        		 -
        OK
        "ON" (sensor is touched) and "OFF" (sensor is not touched) appears on the screen.

    NG

    CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU [SMART KEY ECU ASSEMBLY] - DOOR ELECTRICAL KEY OSCILLATOR) Click here

    OK

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

  4. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU [SMART KEY ECU ASSEMBLY] - DOOR ELECTRICAL KEY OSCILLATOR)


    1. A015BPVE05

      Disconnect the E30 ECU connector.

    2. Disconnect the z28 oscillator connector.

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      E30-1 (SEL3) - z28-4 (SEL) Always Below 1 Ω
      E30-28 (SEN3) - z28-6 (SENS) Always Below 1 Ω
      E30-1 (SEL3) - Body ground Always 10 kΩ or higher
      E30-28 (SEN3) - Body ground Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      E30-2 (SEL4) - z28-4 (SEL) Always Below 1 Ω
      E30-27 (SEN4) - z28-6 (SENS) Always Below 1 Ω
      E30-2 (SEL4) - Body ground Always 10 kΩ or higher
      E30-27 (SEN4) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. CHECK HARNESS AND CONNECTOR (DOOR ELECTRICAL KEY OSCILLATOR - REAR DOOR OUTSIDE HANDLE)


    1. A01561EE43

      Disconnect the z27 handle connector.

    2. Disconnect the z28 oscillator connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      z27-6 (SGT) - z28-2 (SGT) Always Below 1 Ω
      z27-6 (SGT) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. REPLACE DOOR ELECTRICAL KEY OSCILLATOR


    1. Replace the door electrical key oscillator Click here.


    NEXT

  7. CHECK DOOR ELECTRICAL KEY OSCILLATOR (OPERATION)


    1. Check that the entry function operates normally.

      OK
      Operates normally.

    NG

    REPLACE REAR DOOR OUTSIDE HANDLE Click here

    OK

    END (DOOR ELECTRICAL KEY OSCILLATOR IS DEFECTIVE)

  8. REPLACE REAR DOOR OUTSIDE HANDLE


    1. Replace the rear door outside handle Click here.


    NEXT

  9. CHECK REAR DOOR OUTSIDE HANDLE (OPERATION)


    1. Check that the entry function operates normally.

      OK
      Operates normally.

    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    OK

    END (REAR DOOR OUTSIDE HANDLE IS DEFECTIVE)