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

DESCRIPTION

If the room oscillator does not recognize a key, one of the following may be the cause: 1) communication between the indoor electrical key oscillator (for front floor) and electrical key transmitter cannot be performed; or 2) communication between the indoor electrical key oscillator (for center floor) and electrical key transmitter cannot be performed; or 3) communication between the indoor electrical key oscillator (for rear floor) and electrical key transmitter cannot be performed.

WIRING DIAGRAM

A01CAUQE11

INSPECTION PROCEDURE

Note


  • The smart entry and start system (for entry function) uses a multiplex communication system (LIN communication system) and 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 system is functioning properly.

  • When using the intelligent tester with the engine switch off to troubleshoot: Connect the intelligent tester to the DLC3, and turn a courtesy light switch on and off at 1.5-second intervals until communication between the tester and vehicle begins.

PROCEDURE


  1. READ VALUE USING INTELLIGENT TESTER (ENTRY CANCEL FUNCTION)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the intelligent tester on.

    4. Enter the following menus: Body / Entry & Start / Data List.

    5. Read the Data List according to the display on the intelligent tester.

      Entry & Start (Certification ECU (Smart Key ECU Assembly))
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Auto Entry Cancel SW Entry function cancel / ON or OFF Mode status displayed -
      Result
      Result Proceed to
      Entry function cancel is OFF A
      Entry function cancel is ON B

    B

    PERFORM CANCELLATION OF ENTRY KEY CANCEL FUNCTION (Proceed to Customize Parameters) Click here

    A

  2. CHECK SMART ENTRY AND START SYSTEM (for Start Function)


    1. A01CEH0E03
      Text in Illustration
      *A w/ Power Back Door System
      *1 Within 10 mm

      Remove the battery of the electrical key transmitter Click here.

    2. With the brake pedal depressed, hold the key within 10 mm (0.394 in.) of the engine switch while facing the logo side of the key to the engine switch.

    3. When operating the engine switch, check whether the power source mode changes.

      OK
      Power source mode changes.

      Tech Tips


      • When the electrical key transmitter cannot be verified even though it is within the specified range, the engine start check can be performed by removing the transmitter battery from the electrical key transmitter and holding the transmitter close to the engine switch.

      • When performing the check, if the power source mode changes, there is a problem with key certification inside the cabin.


    NG

    GO TO SMART ENTRY AND START SYSTEM (for Start Function) (Proceed to Power Source Mode does not Change) Click here

    OK

  3. CHECK WAVE ENVIRONMENT


    1. Install the battery to the electrical key transmitter Click here.

    2. Bring the electrical key transmitter near the indoor electrical key oscillator (for 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 indoor electrical key oscillator (for front floor), communication is not possible.

    3. Bring the electrical key transmitter near the indoor electrical key oscillator (for center floor), and check that the engine can be started.

      Note

      If the key is brought within 0.2 m (0.656 ft.) of the indoor electrical key oscillator (for center floor), communication is not possible.

    4. Bring the electrical key transmitter near the indoor electrical key oscillator (for rear floor), 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 indoor electrical key oscillator (for rear floor), communication is not possible.

      Tech Tips


      • When the electrical key transmitter is brought near the indoor electrical key oscillator, the possibility of wave interference decreases, and it can be determined if wave interference is causing the problem symptom.

      • If the operation is normal, the possibility of wave interference is high. Also, added vehicle components may cause wave interference. If installed, remove them and perform the operation check.

      OK
      The engine starts.

    NG

    PERFORM KEY DIAGNOSTIC MODE INSPECTION Click here

    OK

    AFFECTED BY WAVE INTERFERENCE

  4. PERFORM KEY DIAGNOSTIC MODE INSPECTION


    1. A01CC8ME02
      Text in Illustration
      *1 Inspection Point

      Diagnostic mode inspection (indoor electrical key oscillator (for front floor))


      1. Connect the intelligent tester to the DLC3.

      2. Turn the engine switch on (IG).

      3. Turn the intelligent tester on.

      4. Enter the following menus: Body / Entry & Start / Key Communication Check / Overhead + Front Room.

      5. When the electrical key transmitter is placed on the driver seat or front passenger seat cushion, check that the wireless door lock buzzer sounds.

    2. A01CEAFE02
      Text in Illustration
      *1 Inspection Point

      Diagnostic mode inspection (indoor electrical key oscillator (for center floor))


      1. Connect the intelligent tester to the DLC3.

      2. Turn the engine switch on (IG).

      3. Turn the intelligent tester on.

      4. Enter the following menus: Body / Entry & Start / Key Communication Check / Overhead + Rear Room.

      5. When the electrical key transmitter is placed on the rear seat cushion, check that the wireless door lock buzzer sounds.

    3. A01CE04E02
      Text in Illustration
      *1 Inspection Point
      *2 0.1 m (0.328 ft.)
      *3 0.2 m (0.328 ft.)

      Diagnostic mode inspection (indoor electrical key oscillator (for rear floor))


      1. Connect the intelligent tester to the DLC3.

      2. Turn the engine switch on (IG).

      3. Turn the intelligent tester on.

      4. Enter the following menus: Body / Entry & Start / Key Communication Check / Overhead + Back Door (inside).

      5. When the electrical key transmitter is held at the same height as the rear bumper upper surface and aligned with the center of the rear of the vehicle, check that the wireless door lock buzzer sounds.

        Tech Tips

        If the buzzer sounds, it can be determined that the indoor electrical key oscillators are operating normally.

        Result
        Result Proceed to
        Wireless door lock buzzer sounds for all indoor electrical key oscillators A
        Wireless door lock buzzer does not sound only for indoor electrical key oscillator (for front floor) B
        Wireless door lock buzzer does not sound only for indoor electrical key oscillator (for center floor) C
        Wireless door lock buzzer does not sound only for indoor electrical key oscillator (for rear floor) D

    B

    CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - INDOOR ELECTRICAL KEY OSCILLATOR) Click here

    C

    CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - INDOOR ELECTRICAL KEY OSCILLATOR) Click here

    D

    CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - INDOOR ELECTRICAL KEY OSCILLATOR) Click here

    A

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

  5. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - INDOOR ELECTRICAL KEY OSCILLATOR)


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

    2. Disconnect the indoor electrical key oscillator (for front floor) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G20-11 (CLG5) - N24-1 (CLG3) Always Below 1 Ω
      G20-12 (CG5B) - N24-3 (CLGB) Always Below 1 Ω
      G20-11 (CLG5) - Body ground Always 10 kΩ or higher
      G20-12 (CG5B) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. INSPECT CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) (for Front Floor)


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

    2. Disconnect the indoor electrical key oscillator (for front floor) connector.

    3. A01CBT2E03
      Text in Illustration
      *1

      Component with harness connected

      (Certification ECU (Smart Key ECU Assembly))
      *2 GND

      Using an oscilloscope, check the waveform.

      Waveform (Reference)
      Tester Connection Tool Setting Condition Specified Condition
      G20-11 (CLG5) - G20-12 (CG5B) 2 V/DIV, 2 μs/DIV. (Reference) Engine switch off → on (IG) Pulse generation

    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    OK

    REPLACE INDOOR ELECTRICAL KEY OSCILLATOR (for Front Floor) Click here

  7. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - INDOOR ELECTRICAL KEY OSCILLATOR)


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

    2. Disconnect the indoor electrical key oscillator (for center floor) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G20-13 (CLG6) - N14-1 (CLG4) Always Below 1 Ω
      G20-14 (CG6B) - N14-2 (CLGB) Always Below 1 Ω
      G20-13 (CLG6) - Body ground Always 10 kΩ or higher
      G20-14 (CG6B) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  8. INSPECT CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) (for Center Floor)


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

    2. Reconnect the indoor electrical key oscillator (for center floor) connector.

    3. A01CBT2E04
      Text in Illustration
      *1

      Component with harness connected

      (Certification ECU (Smart Key ECU Assembly))
      *2 GND

      Using an oscilloscope, check the waveform.

      Waveform (Reference)
      Tester Connection Tool Setting Condition Specified Condition
      G20-13 (CLG6) - G20-14 (CG6B) 2 V/DIV, 2 μs/DIV. (Reference) Engine switch off → on (IG) Pulse generation

    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    OK

    REPLACE INDOOR ELECTRICAL KEY OSCILLATOR (for Center Floor) Click here

  9. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - INDOOR ELECTRICAL KEY OSCILLATOR)


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

    2. Disconnect the indoor electrical key oscillator (for rear floor) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G20-15 (CLG7) - M26-1 (CLG6) Always Below 1 Ω
      G20-16 (CG7B) - M26-2 (CLGB) Always Below 1 Ω
      G20-15 (CLG7) - Body ground Always 10 kΩ or higher
      G20-16 (CG7B) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  10. INSPECT CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) (for Rear Floor)


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

    2. Reconnect the indoor electrical key oscillator (for rear floor) connector.

    3. A01CBT2E05
      Text in Illustration
      *1

      Component with harness connected

      (Certification ECU (Smart Key ECU Assembly))
      *2 GND

      Using an oscilloscope, check the waveform.

      Waveform (Reference)
      Tester Connection Tool Setting Condition Specified Condition
      G20-15 (CLG7) - G20-16 (CG7B) 2 V/DIV, 2 μs/DIV. (Reference) Engine switch off → on (IG) Pulse generation

    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    OK

    REPLACE INDOOR ELECTRICAL KEY OSCILLATOR (for Rear Floor) Click here