ENTRY AND START SYSTEM(for Entry Function) Room Oscillator does not Recognize Key

DESCRIPTION

If code verification cannot be performed in the vehicle interior, there may be problems with the communication between the vehicle (indoor electrical key antenna assembly [front floor], [rear floor] or [inside luggage]) and electrical key transmitter sub-assembly, or the certification ECU (smart key ECU assembly) may be malfunctioning. When the electrical key transmitter sub-assembly is brought into the vehicle, verification of the key ID code transmitted from the electrical key transmitter sub-assembly and the key ID code stored in the certification ECU (smart key ECU assembly) is performed. If verification cannot be performed or the codes do not match, the power switch cannot be turned on (IG) and the hybrid control system cannot be started.

When a door is unlocked and the electrical key transmitter sub-assembly is brought into the vehicle, the certification ECU (smart key ECU assembly) activates the indoor electrical key antenna assembly which transmits electric waves to detect the electrical key transmitter sub-assembly. If the electrical key transmitter sub-assembly recognizes that it is in the detection area, it responds with the key ID code. This information is received by the indoor electrical key antenna and then sent to the certification ECU (smart key ECU assembly).

WIRING DIAGRAM

A005F3QE24
*a No. 1 Indoor Electrical Key Antenna Assembly (Front Floor)
*b No. 3 Indoor Electrical Key Antenna Assembly (Rear Floor)
*c No. 2 Indoor Electrical Key Antenna Assembly (Inside Luggage)
*d Certification ECU (Smart Key ECU Assembly)

CAUTION / NOTICE / HINT

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

  • Before replacing the certification ECU (smart key ECU assembly), refer to the Service Bulletin.

  • After repair, confirm DTC not reoccur with performing the "DTC Output Confirmation Operation".

  • Indoor electrical key antenna assembly have an antenna coil between each two CLG terminals.

PROCEDURE


  1. CHECK ENTRY AND START SYSTEM (FOR ENTRY FUNCTION)


    1. Check that the entry lock and unlock functions operate for each door Click here.


    NG

    GO TO PROBLEM SYMPTOMS TABLE Click here

    OK

  2. CHECK ENTRY AND START SYSTEM (FOR START FUNCTION)


    1. A005D20E01
      Text in Illustration
      *1 Power Switch
      *2 Electrical Key Transmitter Sub-assembly

      Remove the transmitter battery of the electrical key transmitter Click here.

    2. With the brake pedal depressed, touch the TOYOTA mark of the electrical key transmitter sub-assembly to the power switch.

    3. When operating the power switch, check whether the hybrid control system starts.

      Tech Tips


      • When the electrical key transmitter sub-assembly cannot be verified even though it is inside the detection area, the hybrid control system start check can be performed by removing the transmitter battery from the electrical key transmitter sub-assembly and holding the electrical key transmitter sub-assembly against the power switch.

      • If the hybrid control system cannot be started when performing this inspection, the certification ECU (smart key ECU assembly) or ID code box (immobiliser code ECU) may be malfunctioning.

      OK
      Hybrid control system starts.

    NG

    GO TO ENTRY AND START SYSTEM (FOR START FUNCTION) Click here

    OK

  3. CHECK WAVE ENVIRONMENT


    1. Install the transmitter battery to the electrical key transmitter sub-assembly Click here.

    2. Bring the electrical key transmitter sub-assembly near the door control receiver and perform a entry and start system check Click here.

      Tech Tips

      As the effect of electric wave interference decreases by moving the electrical key transmitter sub-assembly close to the door control receiver, it may be possible to check whether electric wave interference is the cause of the problem.

      Result
      Result Proceed to
      System cannot be operated A
      System can be operated B

      Tech Tips


      • If the problem only occurs in specific places or at specific times, electric wave interference may be the cause of the problem . Also, the vehicle may be have the effects of electric wave interference with the parts installed by the dealer. As a result, when parts have been installed by the dealer, it may be necessary to remove those parts before inspecting the vehicle.

      • There may be electric wave interference if the vehicle is near broadcasting antennas, large video displays, wireless garage door opener systems, wireless security cameras, home security systems, etc. In this case, move the vehicle to a different location and check if there is any improvement.

      • If a tool for checking electric waves, such as a signal strength meter, is available, move around the area while observing both the LF band (used by the vehicle antenna to form the key detection area) and RF band (used by the key for transmission) to check for locations where there is electric wave interference.


    B

    AFFECTED BY WAVE INTERFERENCE

    A

  4. CHECK ELECTRICAL KEY ANTENNAS IN KEY DIAGNOSTIC MODE


    1. Check the following antennas in the key diagnostic mode Click here.


      1. A005D4LE01
        Text in Illustration
        *a Inspection Point

        Check the No. 1 indoor electrical key antenna assembly (front floor).

        When the electrical key transmitter sub-assembly is at the inspection point, check that the wireless door lock buzzer sounds.

      2. A005ETVE01
        Text in Illustration
        *a Inspection Point

        Check the No. 3 indoor electrical key antenna assembly (rear floor).

        When the electrical key transmitter sub-assembly is at the inspection point, check that the wireless door lock buzzer sounds.

      3. A005D0BE01
        Text in Illustration
        *a Inspection Point

        Check the No. 2 indoor electrical key antenna assembly (inside luggage).

        When the electrical key transmitter sub-assembly is at the inspection point, check that the wireless door lock buzzer sounds.

        Tech Tips


        • If the buzzer sounds, it can be determined that the vehicle interior transmitters are operating normally.

        • It is possible to check which indoor electrical key antenna assembly (front floor, rear floor or inside luggage) is operating by the sounding of the buzzer.

        • If the buzzer does not sound for any indoor electrical key antenna assemblies, the certification ECU (smart key ECU assembly) circuit may have a malfunction.

        OK
        Wireless door lock buzzer sounds.
        Result
        Result Proceed to
        Front operation check fails A
        Rear operation check fails B
        Luggage operation check fails C
        Front, rear and luggage operation checks are normal D

    B

    CHECK HARNESS AND CONNECTOR (NO. 3 INDOOR ELECTRICAL KEY ANTENNA - CERTIFICATION ECU) Click here

    C

    CHECK HARNESS AND CONNECTOR (NO. 2 INDOOR ELECTRICAL KEY ANTENNA - CERTIFICATION ECU) Click here

    D

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    A

  5. CHECK HARNESS AND CONNECTOR (NO. 1 INDOOR ELECTRICAL KEY ANTENNA - CERTIFICATION ECU)


    1. Disconnect the L11 No. 1 indoor electrical key antenna assembly (front floor) connector.

    2. Disconnect the L62 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
      L11-1 (ANTE5) - L62-7 (CLG5) Always Below 1 Ω
      L11-3 (CLGB) - L62-8 (CG5B) Always Below 1 Ω
      L11-1 (ANTE5) or L62-7 (CLG5) - Body ground Always 10 kΩ or higher
      L11-3 (CLGB) or L62-8 (CG5B) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) (OUTPUT TO NO. 1 INDOOR ELECTRICAL KEY ANTENNA [FRONT FLOOR])


    1. A005A30E02
      Text in Illustration
      *1 Waveform
      *a

      Front view of wire harness connector

      (to No. 1 indoor Electrical Key Antenna Assembly [Front Floor])
      *b Door open
      *c After approximately 30 seconds from when the door is closed

      Disconnect the L11 No. 1 indoor electrical key antenna assembly (front floor) connector.

    2. Connect the L62 certification ECU (smart key ECU assembly) connector.

    3. Using an oscilloscope, check the waveform.

      OK
      Tester Connection Condition Tool Setting Specified Condition
      L11-1 (ANTE5) - L11-3 (CLGB)

      Procedure:


      1. Power switch off

      2. Key not inside vehicle

      3. Door is open

      4. Door is closed

      5. 30 seconds elapse

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

    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    OK

  7. REPLACE NO. 1 INDOOR ELECTRICAL KEY ANTENNA ASSEMBLY (FRONT FLOOR)


    1. Temporarily replace the No. 1 indoor electrical key antenna assembly (front floor) with a new or normally functioning one Click here.


    NEXT

  8. CHECK ELECTRICAL KEY ANTENNA IN KEY DIAGNOSTIC MODE


    1. Check the following antenna in the key diagnostic mode Click here.


      1. A005D4LE01
        Text in Illustration
        *a Inspection Point

        Check the No. 1 indoor electrical key antenna assembly (front floor).

        When the electrical key transmitter sub-assembly is at the inspection point, check that the wireless door lock buzzer sounds.

        OK
        Wireless door lock buzzer sounds.

    OK

    END (NO. 1 INDOOR ELECTRICAL KEY ANTENNA ASSEMBLY IS DEFECTIVE)

    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

  9. CHECK HARNESS AND CONNECTOR (NO. 3 INDOOR ELECTRICAL KEY ANTENNA - CERTIFICATION ECU)


    1. Disconnect the R10 No. 3 indoor electrical key antenna assembly (rear floor) connector.

    2. Disconnect the L62 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
      R10-1 (ANTE6) - L62-24 (CLG6) Always Below 1 Ω
      R10-3 (CLGB) - L62-25 (CG6B) Always Below 1 Ω
      R10-1 (ANTE6) or L62-24 (CLG6) - Body ground Always 10 kΩ or higher
      R10-3 (CLGB) or L62-25 (CG6B) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  10. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) (OUTPUT TO NO. 3 INDOOR ELECTRICAL KEY ANTENNA [REAR FLOOR])


    1. A005A1KE03
      Text in Illustration
      *1 Waveform
      *a

      Front view of wire harness connector

      (to No. 3 indoor Electrical Key Antenna Assembly [Rear Floor])
      *b Door open
      *c After approximately 30 seconds from when the door is closed

      Disconnect the R10 No. 3 indoor electrical key antenna assembly (rear floor) connector.

    2. Connect the L62 certification ECU (smart key ECU assembly) connector.

    3. Using an oscilloscope, check the waveform.

      OK
      Tester Connection Condition Tool Setting Specified Condition
      R10-1 (ANTE6) - R10-3 (CLGB)

      Procedure:


      1. Power switch off

      2. Key not inside vehicle

      3. Door is open

      4. Door is closed

      5. 30 seconds elapse

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

    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    OK

  11. REPLACE NO. 3 INDOOR ELECTRICAL KEY ANTENNA ASSEMBLY (REAR FLOOR)


    1. Temporarily replace the No. 3 indoor electrical key antenna assembly (rear floor) with a new or normally functioning one Click here.


    NEXT

  12. CHECK ELECTRICAL KEY ANTENNA IN KEY DIAGNOSTIC MODE


    1. Check the following antenna in the key diagnostic mode Click here.


      1. A005ETVE01
        Text in Illustration
        *a Inspection Point

        Check the No. 3 indoor electrical key antenna assembly (rear floor).

        When the electrical key transmitter sub-assembly is at the inspection point, check that the wireless door lock buzzer sounds.

        OK
        Wireless door lock buzzer sounds.

    OK

    END (NO. 3 INDOOR ELECTRICAL KEY ANTENNA ASSEMBLY WAS DEFECTIVE)

    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

  13. CHECK HARNESS AND CONNECTOR (NO. 2 INDOOR ELECTRICAL KEY ANTENNA - CERTIFICATION ECU)


    1. Disconnect the S26 No. 2 indoor electrical key antenna assembly (inside luggage) connector.

    2. Disconnect the L62 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
      S26-1 (ANTE7) - L62-26 (CLG7) Always Below 1 Ω
      S26-3 (CLGB) - L62-27 (CG7B) Always Below 1 Ω
      S26-1 (ANTE7) or L62-26 (CLG7) - Body ground Always 10 kΩ or higher
      S26-3 (CLGB) or L62-27 (CG7B) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  14. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) (OUTPUT TO INDOOR NO. 2 ELECTRICAL KEY ANTENNA)


    1. A0059S7E02
      Text in Illustration
      *1 Waveform
      *a

      Front view of wire harness connector

      (to No. 2 indoor Electrical Key Antenna Assembly [Inside Luggage])
      *b Door open
      *c After approximately 30 seconds from when the door is closed

      Disconnect the S26 No. 2 indoor electrical key antenna assembly (inside luggage) connector.

    2. Connect the L62 certification ECU (smart key ECU assembly) connector.

    3. Using an oscilloscope, check the waveform.

      OK
      Tester Connection Condition Tool Setting Specified Condition
      S26-1 (ANTE7) - S26-3 (CLGB)

      Procedure:


      1. Power switch off

      2. Key not inside vehicle

      3. Door is open

      4. Door is closed

      5. 30 seconds elapse

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

    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    OK

  15. REPLACE NO. 2 INDOOR ELECTRICAL KEY ANTENNA ASSEMBLY (INSIDE LUGGAGE)


    1. Temporarily replace the No. 2 indoor electrical key antenna assembly (inside luggage) with a new or normally functioning one Click here.


    NEXT

  16. CHECK ELECTRICAL KEY ANTENNA IN KEY DIAGNOSTIC MODE


    1. Check the following antenna in the key diagnostic mode Click here.


      1. A005D0BE01
        Text in Illustration
        *a Inspection Point

        Check the No. 2 indoor electrical key antenna assembly (inside luggage).

        When the electrical key transmitter sub-assembly is at the inspection point, check that the wireless door lock buzzer sounds.

        OK
        Wireless door lock buzzer sounds.

    OK

    END (NO. 2 INDOOR ELECTRICAL KEY ANTENNA ASSEMBLY WAS DEFECTIVE)

    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)