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 engine switch cannot be turned on (IG) and the engine 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 radio 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

A01LXXLE13

CAUTION / NOTICE / HINT

Note


  • The entry and start system (for Entry Function) uses the CAN communication system and LIN communication system. First inspect the communication systems by following How to Proceed with Troubleshooting. Troubleshoot the entry and start system (for Entry Function) after confirming that the communication systems are functioning properly.

    Click here

  • When using the GTS with the engine switch off, connect the GTS to the DLC3 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 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.

  • Before replacing the certification ECU (smart key ECU assembly), refer to entry and start system (for Entry Function) Precaution.

    Click here

  • After repair, confirm that no DTCs are output by performing "DTC Output Confirmation Operation".

  • The indoor electrical key antenna assemblies each have an antenna coil between each two CLG terminals.

  • The door control receiver is also related to interior verification.

PROCEDURE


  1. CHECK ENTRY DOOR LOCK OPERATION


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

      Click here

      Tech Tips

      If the door control receiver is defective, code verification does not begin in the cabin and the entry functions do not operate.

      OK
      All door entry lock and unlock functions operate normally.
      Result
      Proceed to
      OK
      NG

    NG

    GO TO OTHER PROBLEM (Proceed to Problem Symptoms Table) Click here

    OK

  2. CHECK PUSH-BUTTON START FUNCTION


    1. A01LWAAC01
      *1 Engine Switch
      *2 Electrical Key Transmitter Sub-assembly

      Remove the transmitter battery of the electrical key transmitter sub-assembly.

      Click here

    2. With the brake pedal*1 or clutch pedal*2 depressed, face the logo side of the electrical key transmitter sub-assembly towards the engine switch, hold the transmitter near the engine switch and then press the engine switch.

    3. When operating the engine switch, check whether the engine starts.


      • *1: for CVT or Multi-Mode Manual Transaxle

      • *2: for Manual Transaxle

      Tech Tips


      • When the electrical key transmitter sub-assembly cannot be verified even though it is inside the detection area, the engine 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 near the engine switch.

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

      OK
      Engine starts.
      Result
      Proceed to
      OK
      NG

    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 NO. 3 indoor electrical key antenna assembly (front floor) and perform an entry and start system check.

      Click here

      Note

      Communication may not be possible if the electrical key transmitter sub-assembly is within 0.2 m (0.656 ft.) of the NO. 3 indoor electrical key antenna assembly (front floor).

    3. Bring the electrical key transmitter sub-assembly near the NO. 2 indoor electrical key antenna assembly (rear floor) and perform an entry and start system check.

      Click here

      Tech Tips

      Check that the customize status of the "Ignition Available Area" has been "All".

      Note

      Communication may not be possible if the electrical key transmitter sub-assembly is within 0.2 m (0.656 ft.) of the NO. 2 indoor electrical key antenna assembly (rear floor).

    4. Bring the electrical key transmitter sub-assembly near the NO. 1 indoor electrical key antenna assembly (inside luggage) and perform an entry and start system check. (except Sedan)

      Click here

      Tech Tips

      Check that the customize status of the "Ignition Available Area" has been "All".

      Note

      Communication may not be possible if the electrical key transmitter sub-assembly is within 0.2 m (0.656 ft.) of the NO. 1 indoor electrical key antenna assembly (inside luggage).

      Tech Tips


      • As the effect of wave interference decreases by moving the electrical key transmitter sub-assembly close to each indoor electrical key antenna assembly, it may be possible to check whether wave interference is the cause of the problem.

      • 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.

      • There may be 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 radio 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 detection area) and RF band (used by the electrical key transmitter sub-assembly for transmission) to check for locations where there is wave interference.

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

    B

    AFFECTED BY WAVE INTERFERENCE

    A

  4. CHECK KEY DIAGNOSTIC MODE


    1. Check the following antenna in key diagnostic mode.

      Click here

    2. Select either channel 1 or channel 2 and perform key diagnostic mode inspection for each channel.

      Tech Tips

      If the buzzer sounds with [CH1] displayed but not with [CH2], the electrical key transmitter sub-assembly cannot be detected by channel 2 due to a malfunction, such as wave interference.


      1. A01LXT8C01
        *a Inspection Point

        Check the NO. 3 indoor electrical key antenna assembly (front floor).

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


        Body Electrical > Entry&Start > Utility
        Tester Display
        Communication Check(Key Diag Mode)
      2. A01LW8WC01
        *A except Sedan
        *B for Sedan
        *a Inspection Point

        Check the NO. 2 indoor electrical key antenna assembly (rear floor).

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


        Body Electrical > Entry&Start > Utility
        Tester Display
        Communication Check(Key Diag Mode)
      3. A01M0MYC01
        *a Inspection Point

        Check the NO. 1 indoor electrical key antenna (inside luggage): (except Sedan)

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


        Body Electrical > Entry&Start > Utility
        Tester Display
        Communication Check(Key Diag Mode)

        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 be malfunctioning.

        OK
        Wireless door lock buzzer sounds.
      Result
      Result Proceed to
      Front floor operation check fails A
      Rear floor operation check fails B
      Inside luggage operation check fails (except Sedan) C
      All operation checks are normal D

    B

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

    C

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

    D

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    A

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


    1. Disconnect the L24 NO. 3 indoor electrical key antenna assembly (front floor) connector.

    2. Disconnect the E35 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
      L24-1 (ANTE5) - E35-3 (CLG5) Always Below 1 Ω
      L24-3 (CLGB) - E35-2 (CG5B) Always Below 1 Ω
      L24-1 (ANTE5) or E35-3 (CLG5) - Body ground Always 10 kΩ or higher
      L24-3 (CLGB) or E35-2 (CG5B) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) (OUTPUT TO NO. 3 INDOOR ELECTRICAL KEY ANTENNA)


    1. A01LV26C10
      *a

      Front view of wire harness connector

      (to NO. 3 Indoor Electrical Key Antenna (Front Floor))
      *b Waveform
      *c Within approximately 30 seconds from when the door is closed
      *d After approximately 30 seconds from when the door is closed

      Disconnect the L24 NO. 3 indoor electrical key antenna assembly (front floor) connector.

    2. Connect the E35 certification ECU (smart key ECU assembly) connector.

    3. Using an oscilloscope, check the waveform.

      OK
      Tester Connection Condition Tool Setting Specified Condition
      L24-1 (ANTE5) - L24-3 (CLGB)

      Procedure:


      1. Engine switch off

      2. Electrical key transmitter sub-assembly not inside vehicle

      3. Door is open

      4. Door is closed

      5. Within 30 seconds

      		 2 V/DIV., 500 ms/DIV.

      Pulse generation

      (See waveform)
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    OK

  7. REPLACE NO. 3 INDOOR ELECTRICAL KEY ANTENNA ASSEMBLY (FRONT FLOOR)


    1. Temporarily replace the NO. 3 indoor electrical key antenna assembly (front floor) with a new or known good one.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  8. CHECK KEY DIAGNOSTIC MODE


    1. Check the following antenna in key diagnostic mode.

      Click here

    2. A01LXT8C01
      *a Inspection Point

      Select either channel 1 or channel 2 and perform key diagnostic mode inspection for each channel.


      Body Electrical > Entry&Start > Utility
      Tester Display
      Communication Check(Key Diag Mode)

      Tech Tips

      If the buzzer sounds with [CH1] displayed but not with [CH2], the electrical key transmitter sub-assembly cannot be detected by channel 2 due to a malfunction, such as wave interference.


      1. Check the NO. 3 indoor electrical key antenna assembly (front floor). When the electrical key transmitter sub-assembly is at either inspection point, check that the wireless door lock buzzer sounds.

        OK
        Wireless door lock buzzer sounds.
      Result
      Proceed to
      OK
      NG

    OK

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

    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

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


    1. Disconnect the L19 NO. 2 indoor electrical key antenna assembly (rear floor) connector.

    2. Disconnect the E34 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
      L19-1 (ANTE6) - E34-11 (CLG6) Always Below 1 Ω
      L19-3 (CLGB) - E34-10 (CG6B) Always Below 1 Ω
      L19-1 (ANTE6) or E34-11 (CLG6) - Body ground Always 10 kΩ or higher
      L19-3 (CLGB) or E34-10 (CG6B) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. A01LV26C11
      *a

      Front view of wire harness connector

      (to NO. 2 Indoor Electrical Key Antenna (Rear floor))
      *b Waveform
      *c Within approximately 30 seconds from when the door is closed
      *d After approximately 30 seconds from when the door is closed

      Disconnect the L19 NO. 2 indoor electrical key antenna assembly (rear floor) connector.

    2. Connect the E34 certification ECU (smart key ECU assembly) connector.

    3. Using an oscilloscope, check the waveform.

      OK
      Tester Connection Condition Tool Setting Specified Condition
      L19-1 (ANTE6) - L19-3 (CLGB)

      Procedure:


      1. Engine switch off

      2. Electrical key transmitter sub-assembly not inside vehicle

      3. Door is open

      4. Door is closed

      5. Within 30 seconds

      		 2 V/DIV., 500 ms/DIV.

      Pulse generation

      (See waveform)
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    OK

  11. REPLACE NO. 2 INDOOR ELECTRICAL KEY ANTENNA ASSEMBLY (REAR FLOOR)


    1. Temporarily replace the NO. 2 indoor electrical key antenna assembly (rear floor) with a new or known good one.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  12. CHECK KEY DIAGNOSTIC MODE


    1. Check the following antenna in key diagnostic mode.

      Click here

    2. A01LW8WC01
      *A except Sedan
      *B for Sedan
      *a Inspection Point

      Select either channel 1 or channel 2 and perform key diagnostic mode inspection for each channel.


      Body Electrical > Entry&Start > Utility
      Tester Display
      Communication Check(Key Diag Mode)

      Tech Tips

      If the buzzer sounds with [CH1] displayed but not with [CH2], the electrical key transmitter sub-assembly cannot be detected by channel 2 due to a malfunction, such as wave interference.


      1. Check the NO. 2 indoor electrical key antenna assembly (rear floor). When the electrical key transmitter sub-assembly is at either inspection point, check that the wireless door lock buzzer sounds.

        OK
        Wireless door lock buzzer sounds.
      Result
      Proceed to
      OK
      NG

    OK

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

    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

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


    1. Disconnect the the M2*1 or L85*2 NO. 1 indoor electrical key antenna assembly (inside luggage) connector.


      • *1: except Sedan

      • *2: for Sedan

    2. Disconnect the E34 certification ECU (smart key ECU assembly) connector.

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

      Standard Resistance
      except Sedan
      Tester Connection Condition Specified Condition
      M2-1 (ANTE7) - E34-9 (CLG7) Always Below 1 Ω
      M2-3 (CLGB) - E34-8 (CG7B) Always Below 1 Ω
      M2-1 (ANTE7) or E34-9 (CLG7) - Body ground Always 10 kΩ or higher
      M2-3 (CLGB) or E34-8 (CG7B) - Body ground Always 10 kΩ or higher
      Standard Resistance
      for Sedan
      Tester Connection Condition Specified Condition
      L85-1 (ANTE7) - E34-9 (CLG7) Always Below 1 Ω
      L85-3 (CLGB) - E34-8 (CG7B) Always Below 1 Ω
      L85-1 (ANTE7) or E34-9 (CLG7) - Body ground Always 10 kΩ or higher
      L85-3 (CLGB) or E34-8 (CG7B) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  14. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) (OUTPUT TO NO. 1 INDOOR ELECTRICAL KEY ANTENNA)


    1. A01LV26C29
      *A except Sedan
      *B for Sedan
      *a

      Front view of wire harness connector

      (to NO. 1 Indoor Electrical Key Antenna (Inside Luggage))
      *b Waveform
      *c Within approximately 30 seconds from when the door is closed
      *d After approximately 30 seconds from when the door is closed

      Disconnect the the M2*1 or L85*2 NO. 1 indoor electrical key antenna assembly (inside luggage) connector.


      • *1: except Sedan

      • *2: for Sedan

    2. Connect the E34 certification ECU (smart key ECU assembly) connector.

    3. Using an oscilloscope, check the waveform.

      OK
      except Sedan
      Tester Connection Condition Tool Setting Specified Condition
      M2-1 (ANTE7) - M2-3 (CLGB)

      Procedure:


      1. Engine switch off

      2. Electrical key transmitter sub-assembly not inside vehicle

      3. Door is open

      4. Door is closed

      5. Within 30 seconds

      		 2 V/DIV., 500 ms/DIV.

      Pulse generation

      (See waveform)
      OK
      for Sedan
      Tester Connection Condition Tool Setting Specified Condition
      L85-1 (ANTE7) - L85-3 (CLGB)

      Procedure:


      1. Engine switch off

      2. Electrical key transmitter sub-assembly not inside vehicle

      3. Door is open

      4. Door is closed

      5. Within 30 seconds

      		 2 V/DIV., 500 ms/DIV.

      Pulse generation

      (See waveform)
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    OK

  15. REPLACE NO. 1 INDOOR ELECTRICAL KEY ANTENNA ASSEMBLY (INSIDE LUGGAGE)


    1. Temporarily replace the NO. 1 indoor electrical key antenna assembly (inside luggage) with a new or known good one.

      for Hatchback: Click here

      for Wagon: Click here

      Result
      Proceed to
      NEXT

    NEXT

  16. CHECK KEY DIAGNOSTIC MODE


    1. Check the following antenna in key diagnostic mode.

      Click here

    2. A01M0MYC01
      *a Inspection Point

      Select either channel 1 or channel 2 and perform the key diagnostic mode inspection for each channel.


      Body Electrical > Entry&Start > Utility
      Tester Display
      Communication Check(Key Diag Mode)

      Tech Tips

      If the buzzer sounds with [CH1] displayed but not with [CH2], the electrical key transmitter sub-assembly cannot be detected by channel 2 due to a malfunction, such as wave interference.


      1. Check the No. 1 indoor electrical key antenna assembly (inside luggage). When the electrical key transmitter sub-assembly is at either inspection point, check that the wireless door lock buzzer sounds.

        OK
        Wireless door lock buzzer sounds.
      Result
      Proceed to
      OK
      NG

    OK

    END (NO. 1 INDOOR ELECTRICAL KEY ANTENNA ASSEMBLY (INSIDE LUGGAGE))

    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)