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) 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 door control receiver and then sent to the certification ECU (smart key ECU assembly).

WIRING DIAGRAM

B00479GE05
*a No. 1 Indoor Electrical Key Antenna Assembly (Front Floor)
*b Electrical Key Wire Harness
*c No. 2 Indoor Electrical Key Antenna Assembly (Inside Luggage)
*d Certification ECU (Smart Key ECU Assembly)

CAUTION / NOTICE / HINT

Note


  • 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.

  • The entry and start system (for Entry Function) uses a LIN communication system and 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 system is functioning properly.

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

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

Tech Tips

Check that the entry cancel function, which is one of the customizing settings of the entry and start system, is not set Click here.

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.

      OK
      Entry lock and unlock functions operate normally.

    NG

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

    OK

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


    1. Remove the battery of the electrical key transmitter sub-assembly Click here.

    2. B0045M9C05
      *1 Engine Switch
      *2 Electrical Key Transmitter Sub-assembly

      With the brake pedal*1 or clutch pedal*2 depressed, hold the electrical key transmitter sub-assembly touch the engine switch while facing the logo side of the electrical key transmitter sub-assembly to the engine switch.


      • *1: for CVT

      • *2: for Manual Transaxle

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

      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), steering lock actuator assembly (steering lock ECU) or ID code box may be malfunctioning.

      OK
      Engine starts.

    NG

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

    OK

  3. CHECK WAVE ENVIRONMENT


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

    2. Bring the electrical key transmitter sub-assembly near the No. 1 indoor electrical key antenna assembly (front floor), and check that the engine can be started.

      Note

      If the key is brought within 0.2 m (0.656 ft.) of the No. 1 indoor electrical key antenna assembly (front floor), communication is not possible.

    3. Bring the electrical key transmitter sub-assembly near the No. 2 indoor electrical key antenna assembly (inside luggage), and check that the engine can be started*.


      • *: If the customize setting for Ignition Available Area is not set to All, the engine will not start. Before performing this inspection, check that All has been selected Click here.

      Note

      If the key is brought within 0.2 m (0.656 ft.) of the No. 2 indoor electrical key antenna assembly (inside luggage), communication is not possible.

      Tech Tips


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

      • If the problem only occurs in specific places or at specific times, wave interference may be the cause of the problem. Also, the vehicle may be experiencing the effects of 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 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 detection area) and RF band (used by the electrical key transmitter sub-assembly for transmission) to check for locations where there is wave interference.

      OK
      The engine starts.

    OK

    AFFECTED BY WAVE INTERFERENCE

    NG

  4. CHECK KEY DIAGNOSTIC MODE


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


      1. B00462LC04
        *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. B00458TC04
        *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 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.

        Result
        Result Proceed to
        Front side operation fails A
        Inside luggage operation fails B
        Front and rear operation checks are normal C

    B

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

    C

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    A

  5. INSPECT ELECTRICAL KEY WIRE HARNESS


    1. Remove the electrical key wire harness.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      FF2-5 - FF2-1 Always Below 1 Ω
      FF2-4 - FF2-2 Always Below 1 Ω

    3. Reinstall the electrical key wire harness.


    NG

    REPLACE ELECTRICAL KEY WIRE HARNESS

    OK

  6. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - NO. 1 INDOOR ELECTRICAL KEY ANTENNA (FRONT FLOOR)


    1. Disconnect the F63 certification ECU (smart key ECU assembly) connector.

    2. Disconnect the F62 No. 1 indoor electrical key antenna assembly (front floor) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F63-3 (CLG5) - F62-1 (CLG3) Always Below 1 Ω
      F63-2 (CG5B) - F62-3 (CLGB) Always Below 1 Ω
      F63-3 (CLG5) - Body ground Always 10 kΩ or higher
      F63-2 (CG5B) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  7. INSPECT CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) (OUTPUT TO NO. 1 ELECTRICAL KEY ANTENNA (FRONT FLOOR))


    1. B0047F4C48
      *a

      Front view of wire harness connector

      (to No. 1 Indoor Electrical Key Antenna Assembly (front floor))
      *b Waveform
      *c Door is open and then closed for 30 seconds
      *d From approximately 30 seconds after door is closed

      Reconnect the F63 certification ECU (smart key ECU assembly) connector.

    2. Using an oscilloscope, check the waveform.

      OK
      Tester Connection Condition Tool Setting Specified Condition
      F62-1 (CLG3) - F62-3 (CLGB)

      Procedure:


      1. Engine switch off

      2. Door is open

      3. Door is closed

      4. 30 seconds elapse

      5. Electrical key transmitter sub-assembly not inside vehicle

      		 2 V/DIV., 500 ms/DIV.

      Pulse generation

      (See waveform)

    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    OK

  8. 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

  9. CHECK KEY DIAGNOSTIC MODE


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

    2. Select either channel 1 or channel 2 and inspect the key diagnostic mode 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 1 due to a malfunction, such as wave interference.


      1. B00462LC05
        *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 WAS DEFECTIVE)

    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

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


    1. Disconnect the F64 certification ECU (smart key ECU assembly) connector.

    2. Disconnect the K11 No. 2 indoor electrical key antenna assembly (inside luggage) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F64-9 (CLG7) -K11-1 (CLG6) Always Below 1 Ω
      F64-8 (CG7B) - K11-3 (CLGB) Always Below 1 Ω
      F64-9 (CLG7) - Body ground Always 10 kΩ or higher
      F64-8 (CG7B) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  11. INSPECT CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) (OUTPUT TO NO. 2 INDOOR ELECTRICAL KEY ANTENNA ASSEMBLY)


    1. B0047F4C49
      *a

      Front view of wire harness connector

      (to No. 2 Indoor Electrical Key Antenna Assembly (inside luggage))
      *b Waveform
      *c Door is open and then closed for 30 seconds
      *d From approximately 30 seconds after door is closed

      Reconnect the F64 certification ECU (smart key ECU assembly) connector.

    2. Using an oscilloscope, check the waveform.

      OK
      Tester Connection Condition Tool Setting Specified Condition
      K11-1 (CLG6) - K11-3 (CLGB)

      Procedure:


      1. Engine switch off

      2. Door is open

      3. Door is closed

      4. 30 seconds elapse

      5. Electrical key transmitter sub-assembly not inside vehicle

      		 2 V/DIV., 500 ms/DIV.

      Pulse generation

      (See waveform)

    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    OK

  12. 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

  13. CHECK KEY DIAGNOSTIC MODE


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


      1. B00458TC05
        *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 WAS DEFECTIVE)

    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)