SMART ENTRY AND START SYSTEM (for Entry Function) Rear Door LH Entry Lock and Unlock Functions do not Operate

DESCRIPTION

If the entry lock and unlock functions do not operate for the rear door LH only, the request code may not be being transmitted from the rear door LH or the rear door outside handle assembly (for rear door LH) (touch sensor) may be malfunctioning. If the entry functions for other doors operate properly, communication between the electrical key transmitter sub-assembly and door control receiver is normal. In this case, there may be a problem with request code transmission (communication between the certification ECU (smart key ECU assembly) and rear door outside handle assembly (for rear door LH) [rear door LH electrical key antenna]), or there may be wave interference.

WIRING DIAGRAM

A01G5BNE12

INSPECTION PROCEDURE

Note


  • The smart 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 smart entry and start system (for Entry Function) after confirming that the communication systems are functioning properly.

  • When using the GTS with the vehicle engine switch off, connect the GTS to the vehicle and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the GTS and the vehicle begins. Then select the Model Code "KEY REGIST" under manual mode and enter the following menus: Body Electrical / Entry&Start(CAN). While using the GTS, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the GTS and the vehicle.

  • 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 smart 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".

  • When the entry lock and unlock functions do not operate for doors other than the driver door and if the engine switch has not been turned on (IG) for 14 days or more, lock/unlock the doors using the wireless door lock function or key linked unlock operation and then check if the entry door lock and unlock functions operate.

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. CHECK WAVE ENVIRONMENT


    1. A01G7G5E01
      Text in Illustration
      *a Approximately 0.3 m (0.984 ft.)

      Bring the electrical key transmitter sub-assembly approximately 0.3 m (0.984 ft.) from the rear door outside handle assembly (for rear door LH) and perform an entry function check Click here.

      Note

      If the electrical key transmitter sub-assembly is brought within 0.2 m (0.656 ft.) of the door handle, communication may not be possible.

      Tech Tips

      If the inspection result is that the problem only occurs in certain locations or at certain times of day, the possibility of wave interference is high. Also, added vehicle components may cause wave interference. If installed, remove them and perform the operation check.

      Result
      Result Proceed to
      Entry function does not operate normally. A
      Entry function operates normally. B

    B

    AFFECTED BY WAVE INTERFERENCE

    A

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


    1. Disconnect the O8 rear door outside handle assembly (for rear door LH) connector.

    2. Disconnect the Q1 certification ECU (smart key ECU assembly) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      O8-3 (ANT2) - Q1-13 (CG3B) Always Below 1 Ω
      O8-6 (ANT1) - Q1-12 (CLG3) Always Below 1 Ω
      O8-5 (B) - Q1-20 (POS3) Always Below 1 Ω
      O8-2 (GND) - Body ground Always Below 1 Ω
      A36-11 (E) - Body ground Always Below 1 Ω
      O8-3 (ANT2) or Q1-13 (CG3B) - Body ground Always 10 kΩ or higher
      O8-6 (ANT1) or Q1-12 (CLG3) - Body ground Always 10 kΩ or higher
      O8-5 (B) or Q1-20 (POS3) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) (OUTPUT TO REAR LH DOOR ELECTRICAL KEY ANTENNA)


    1. A01G7FJE63
      Text in Illustration
      *1 Waveform
      *a

      rear view of wire harness connector

      (to Rear Door Outside Handle Assembly (for Rear Door LH))

      Disconnect the O8 rear door outside handle assembly (for rear door LH) connector.

    2. Connect the Q1 certification ECU (smart key ECU assembly) connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      O8-5 (B) - O8-2 (GND) Engine switch off → on (IG) 9 to 12 V → Below 2 V

    4. Using an oscilloscope, check the waveform.

      OK
      Tester Connection Condition Tool Setting Specified Condition
      O8-3 (ANT2) - O8-6 (ANT1)

      Procedure:


      1. Engine switch off

      2. Electrical key transmitter sub-assembly brought outside vehicle

      3. All doors closed

      4. Electrical key transmitter sub-assembly not inside vehicle

      5. Electrical key transmitter sub-assembly brought outside detection area*

      6. All doors locked through wireless operation

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

      • *: For details about the areas that are inside the entry function detection area, refer to Operation Check Click here.


    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    OK

  5. REPLACE REAR DOOR OUTSIDE HANDLE ASSEMBLY (FOR REAR DOOR LH)


    1. Temporarily replace the rear door outside handle assembly (for rear door LH) with a new or known good one Click here.


    NEXT

  6. CHECK REAR DOOR OUTSIDE HANDLE ASSEMBLY (FOR REAR DOOR LH) (OPERATION)


    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 (REAR DOOR OUTSIDE HANDLE ASSEMBLY (FOR REAR DOOR LH) WAS DEFECTIVE)