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 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) → driver side door outside handle → driver side door electrical key oscillator).

INSPECTION PROCEDURE

PROCEDURE

1. Click here

   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.

   
   
   • OKClick here
   • NGClick here
2. Click here

   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.

      Table 1. Main Body

      Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
      D Door Lock Position SW	Driver side door lock position switch signal / ON or OFF	ON: Driver side door unlocked OFF: Driver side door locked	-

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

   
   
   • OKClick here
   • NGClick here
3. Click here

   READ VALUE USING INTELLIGENT TESTER (TOUCH SENSOR)

   
   

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

      Table 2. Entry & Start

      Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
      D-Door Touch Sensor	Driver side 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.

   
   
   • OKClick here
   • NGClick here
4. Click here

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

   
   
   1. 

      Disconnect the E29 ECU connector.

   2. Disconnect the z24 or z22 oscillator connector.

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition E29-5 (SEL1) - z24-4 (SEL) Always Below 1 Ω E29-22 (SEN1) - z24-6 (SENS) Always Below 1 Ω E29-5 (SEL1) - Body ground Always 10 kΩ or higher E29-22 (SEN1) - Body ground Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition E29-5 (SEL1) - z22-4 (SEL) Always Below 1 Ω E29-22 (SEN1) - z22-6 (SENS) Always Below 1 Ω E29-5 (SEL1) - Body ground Always 10 kΩ or higher E29-22 (SEN1) - Body ground Always 10 kΩ or higher

   
   
   • OKClick here
   • NGClick here
5. Click here

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

   
   
   1. 

      Disconnect the z23 or z21 handle connector.

   2. Disconnect the z24 or z22 oscillator connector.

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition z23-6 (SGT) - z24-2 (SGT) Always Below 1 Ω z23-6 (SGT) - Body ground Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition z21-6 (SGT) - z22-2 (SGT) Always Below 1 Ω z21-6 (SGT) - Body ground Always 10 kΩ or higher

   
   
   • OKClick here
   • NGClick here
6. Click here

   REPLACE DOOR ELECTRICAL KEY OSCILLATOR

   
   

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

   
   
   • NEXTClick here
7. Click here

   CHECK DOOR ELECTRICAL KEY OSCILLATOR (OPERATION)

   
   

   1. Check that the entry function operates normally.

      OK
      Operates normally.

   
   
   • OKClick here
   • NGClick here
8. Click here

   REPLACE FRONT DOOR OUTSIDE HANDLE

   
   

   1. Replace the front door outside handle (Click here).

   
   
   • NEXTClick here
9. Click here

   CHECK FRONT DOOR OUTSIDE HANDLE (OPERATION)

   
   

   1. Check that the entry function operates normally.

      OK
      Operates normally.

   
   
   • OKClick here
   • NGClick here
10. Click here

    GO TO POWER DOOR LOCK CONTROL SYSTEMClick here

11. Click here

    REPAIR OR REPLACE HARNESS OR CONNECTOR

12. Click here

    REPAIR OR REPLACE HARNESS OR CONNECTOR

13. Click here

    END (DOOR ELECTRICAL KEY OSCILLATOR IS DEFECTIVE)

14. Click here

    END (FRONT DOOR OUTSIDE HANDLE IS DEFECTIVE)

15. Click here

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

16. Click here

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