SMART ENTRY AND START SYSTEM (for Entry Function) Driver Side Door Entry Unlock Function does not Operate

DESCRIPTION

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

WIRING DIAGRAM

A01CEEGE57

INSPECTION PROCEDURE

Note

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

PROCEDURE


  1. CHECK POWER DOOR LOCK OPERATION


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

      OK
      Door locks operate normally.

    NG

    GO TO POWER DOOR LOCK CONTROL SYSTEM (Proceed to Problem Symptoms Table) 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.

      Main Body (Main Body ECU)
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      D-Door Lock Pos SW Driver door lock position switch signal/ON or OFF

      ON: Driver door unlocked

      OFF: Driver door locked

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

      B

      (Refer to "Driver Door LOCK/UNLOCK Functions do not Operate" in the problem symptoms table)

    B

    GO TO POWER DOOR LOCK CONTROL SYSTEM (Proceed to Problem Symptoms Table) Click here

    A

  3. READ VALUE USING INTELLIGENT TESTER (DOOR OUTSIDE HANDLE)


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

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

      Entry & Start (Certification ECU (Smart Key ECU Assembly))
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      D-Door Touch Sensor Status of touch sensor (for driver side) / ON or OFF

      ON: Touch sensor touched

      OFF: Touch sensor not touched

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

    NG

    CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - DOOR ELECTRICAL KEY OSCILLATOR) Click here

    OK

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

  4. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - DOOR ELECTRICAL KEY OSCILLATOR)


    1. Disconnect the certification ECU (smart key ECU assembly) connector.

    2. Disconnect the door electrical key oscillator (for driver side) connector.

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

      Standard Resistance
      for RHD
      Tester Connection Condition Specified Condition
      G20-5 (SEL1) - z9-4 (SEL) Always Below 1 Ω
      G20-22 (SEN1) - z9-6 (SENS) Always Below 1 Ω
      G20-5 (SEL1) - Body ground Always 10 kΩ or higher
      G20-22 (SEN1) - Body ground Always 10 kΩ or higher
      for LHD
      Tester Connection Condition Specified Condition
      G20-5 (SEL1) - z11-4 (SEL) Always Below 1 Ω
      G20-22 (SEN1) - z11-6 (SENS) Always Below 1 Ω
      G20-5 (SEL1) - Body ground Always 10 kΩ or higher
      G20-22 (SEN1) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. Disconnect the front door outside handle assembly (for driver side) connector.

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

      Standard Resistance
      for RHD
      Tester Connection Condition Specified Condition
      z8-6 (SGT) - z9-2 (SGT) Always Below 1 Ω
      z8-6 (SGT) - Body ground Always 10 kΩ or higher
      for LHD
      Tester Connection Condition Specified Condition
      z10-6 (SGT) - z11-2 (SGT) Always Below 1 Ω
      z10-6 (SGT) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. REPLACE DOOR ELECTRICAL KEY OSCILLATOR (for Driver Side)


    1. Replace the door electrical key oscillator (for driver side) Click here.


    NEXT

  7. CHECK DOOR ELECTRICAL KEY OSCILLATOR (for Driver Side)


    1. Check that the entry functions operate normally Click here.

      OK
      Entry functions operate normally.

    NG

    REPLACE FRONT DOOR OUTSIDE HANDLE ASSEMBLY (for Driver Side) Click here

    OK

    END (DOOR ELECTRICAL KEY OSCILLATOR WAS DEFECTIVE)

  8. REPLACE FRONT DOOR OUTSIDE HANDLE ASSEMBLY (for Driver Side)


    1. Replace the front door outside handle assembly (for driver side) Click here.


    NEXT

  9. CHECK FRONT DOOR OUTSIDE HANDLE ASSEMBLY (for Driver Side)


    1. Check that the entry functions operate normally Click here.

      OK
      Entry functions operate normally.

    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    OK

    END (FRONT DOOR OUTSIDE HANDLE ASSEMBLY WAS DEFECTIVE)