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

DESCRIPTION

When interior certification is not performed, the certification ECU (smart key ECU assembly) may be malfunctioning, or communication from the vehicle (No. 2 indoor electrical key antenna assembly [front floor], No. 3 indoor electrical key antenna assembly [rear floor]) to the electrical key transmitter sub-assembly, and then from the electrical key transmitter sub-assembly to the certification ECU (smart key ECU assembly) may not be able to be performed.

When the electrical key transmitter sub-assembly is brought into the cabin, the key ID code sent from the electrical key transmitter sub-assembly and the key ID code stored in the certification ECU (smart key ECU assembly) are certified. If the codes do not match and certification cannot be performed, the power source mode cannot be changed to ACC and ON, the engine cannot be started, or the key is locked inside. When the door is unlocked and the electrical key transmitter sub-assembly is brought into the cabin, the certification ECU (smart key ECU assembly) activates each indoor electrical key antenna and forms a detection area. If the electrical key transmitter sub-assembly is recognized within the detection area, the key ID code is sent to the certification ECU (smart key ECU assembly).

WIRING DIAGRAM

A01BB89E32

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 engine switch off to troubleshoot:

    Connect the GTS to the DLC3 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 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".

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

PROCEDURE


  1. CHECK ENTRY DOOR LOCK OPERATION


    1. Check that the engine starts using another electrical key transmitter that has already been registered and the key lock-in prevention function operates in the luggage compartment Click here.

      Note

      To prevent key lock-in, perform the inspection with one of the door windows open.

      Result
      Result Proceed to
      OK A
      NG (Engine does not start and key lock-in prevention function does not operate in the luggage compartment) B
      NG (Engine does not start) C
      NG (Key lock-in prevention function does not operate in the luggage compartment) D

    B

    CHECK WIRELESS DOOR LOCK OPERATION Click here

    C

    CHECK PUSH START FUNCTION Click here

    D

    CHECK WAVE ENVIRONMENT Click here

    A

    END (ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY WAS DEFECTIVE)

  2. CHECK WIRELESS DOOR LOCK OPERATION


    1. Check that the wireless door lock function operates via switch operation of the electrical key transmitter Click here.

      OK
      The wireless door lock function operates normally.

    NG

    Go to PROBLEM SYMPTOMS TABLE Click here

    OK

  3. CHECK PUSH START FUNCTION


    1. A01BCZSE02
      Text in Illustration
      *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 depressed, face the logo side of the electrical 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.

      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) may be malfunctioning.

      OK
      Engine starts.

    NG

    Go to SMART ENTRY AND START SYSTEM (FOR START FUNCTION) Click here

    OK

  4. CHECK WAVE ENVIRONMENT


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

    2. Bring the electrical key transmitter sub-assembly near the No. 2 indoor electrical key antenna assembly (front floor), and perform an engine start 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 shift lever.

      Tech Tips

      Check that the smart ignition operation range is "ALL" through customization Click here.

    3. Bring the electrical key transmitter near the No. 3 indoor electrical key antenna assembly (rear floor), and check that the key lock-in prevention function operates normally 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 center of the rear seat cushion.

      • To prevent key lock-in, perform the inspection with one of the door windows open.

      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 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 electric wave interference due to 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.

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

    B

    AFFECTED BY WAVE INTERFERENCE

    A

  5. CHECK FOR DTC


    1. Check for DTCs Click here.

      OK
      DTC is not output.

    NG

    Go to DIAGNOSTIC TROUBLE CODE CHART Click here

    OK

  6. CHECK KEY DIAGNOSTIC MODE


    1. Check the following antennas 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 2 due to a malfunction, such as wave interference.


      1. A01BC9LE01
        Text in Illustration
        *a Inspection Point

        Check the No. 2 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. A01BFLJE01
        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.

        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 rear floor) 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
        Only the No. 2 indoor electrical key antenna assembly (front floor) wireless door lock buzzer does not sound. A
        Only the No. 3 indoor electrical key antenna assembly (rear floor) wireless door lock buzzer does not sound. B
        The wireless door lock buzzer sounds for all of the interior antennas. C
        The wireless door lock buzzer does not sound for all of the interior antennas. D

    B

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

    C

    CHECK ENTRY DOOR LOCK OPERATION (INTERIOR CERTIFICATION) Click here

    D

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    A

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


    1. Disconnect the R5 No. 2 indoor electrical key antenna assembly (front floor) connector.

    2. Disconnect the B76 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
      R5-1 (ANTE7) - B76-28 (CGND) Always Below 1 Ω
      R5-2 (CLGB) - B76-27 (BGND) Always Below 1 Ω
      R5-1 (ANTE7) or B76-28 (CGND) - Body ground Always 10 kΩ or higher
      R5-2 (CLGB) or B76-27 (BGND) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  8. CHECK ENTRY DOOR LOCK OPERATION (INTERIOR CERTIFICATION)


    1. Connect all of the disconnected connectors and check that the engine starts via smart operation.

      OK
      The engine starts.

    NG

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

    OK

    END (CONNECTOR WAS NOT CONNECTED PROPERLY)

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

    A01BFNWE06
    Text in Illustration
    *a

    Component with harness connected

    (Certification ECU [Smart Key ECU Assembly])

    		 *b Waveform 1
    *c Within approximately 30 seconds from when the door is closed *d After approximately 30 seconds from when the door is closed

    1. Using an oscilloscope, check the waveform.

      OK
      Tester Connection Switch Condition Tool Setting Specified Condition
      B76-27 (CG6B) - B76-28 (CGND)

      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 1)

    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    OK

    REPLACE NO. 2 INDOOR ELECTRICAL KEY ANTENNA ASSEMBLY (FRONT FLOOR) Click here

  10. CHECK HARNESS AND CONNECTOR (NO. 3 INDOOR ELECTRICAL KEY ANTENNA ASSEMBLY - CERTIFICATION ECU [SMART KEY ECU ASSEMBLY])


    1. Disconnect the Y6 No. 3 indoor electrical key antenna assembly (rear floor) connector.

    2. Disconnect the B76 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
      Y6-1 (ANTE6) - B76-26 (CLG6) Always Below 1 Ω
      Y6-2 (CLGB) - B76-9 (BGND) Always Below 1 Ω
      Y6-1 (ANTE6) or B76-26 (CLG6) - Body ground Always 10 kΩ or higher
      Y6-2 (CLGB) or B76-9 (BGND) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  11. CHECK ENTRY DOOR LOCK OPERATION (INTERIOR CERTIFICATION)


    1. Connect all of the disconnected connectors and check that the key lock-in prevention function operates in the luggage compartment.

      OK
      The key lock-in prevention function operates.

    NG

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

    OK

    END (CONNECTOR WAS NOT CONNECTED PROPERLY)

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

    A01BFNWE07
    Text in Illustration
    *a

    Component with harness connected

    (Certification ECU [Smart Key ECU Assembly])

    		 *b Waveform 1
    *c Within approximately 30 seconds from when the door is closed *d After approximately 30 seconds from when the door is closed

    1. Using an oscilloscope, check the waveform.

      OK
      Tester Connection Switch Condition Tool Setting Specified Condition
      B76-26 (CLG6) -B76-9 (BGND)

      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 1)

    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    OK

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

  13. CHECK ENTRY DOOR LOCK OPERATION (INTERIOR CERTIFICATION)


    1. Connect all of the disconnected connectors and check that the engine starts via smart operation and the key lock-in prevention function operates in the luggage compartment.

      OK
      The engine starts and the key lock-in prevention function operates in the luggage compartment.

    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    OK

    USE SIMULATION METHOD TO CHECK Click here