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

DTC Code DTC Name
Room Oscillator does not Recognize Key

DESCRIPTION

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

WIRING DIAGRAM

B225788E08

CAUTION / NOTICE / HINT

Note:

  • Before performing the inspection, check that there are no problems related to the "CAN Communication System" and "LIN Communication System".

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

PROCEDURE

  1. CHECK ENTRY AND START SYSTEM (START FUNCTION)

    1. U122414E01

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

    2. With the clutch pedal (for Manual Transaxle) or brake pedal (except Manual Transaxle) depressed, touch the TOYOTA mark 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.

      Tip:

      • When the electrical key transmitter cannot be verified even though it is in the operating range of the start function, the engine start check can be performed by removing the transmitter battery from the electrical key transmitter and holding the transmitter against the engine switch.

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

    CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - ENGINE SWITCH AND BODY GROUND)Click here

  2. 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 (front floor) and perform an engine control system start check.

      Note:

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

      OK

      Engine starts.

    3. Bring the electrical key transmitter near the indoor electrical key oscillator (rear floor) and perform an engine control system start check.

      Note:

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

      OK

      Engine starts.

    4. Bring the electrical key transmitter near the indoor electrical key oscillator (inside luggage) and perform an engine control system start check.

      Note:

      If the key is brought within 0.2 m (0.656 ft.) of the oscillator location inside the luggage area, communication is not possible.

      Tip:

      • 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 inspection result is that the operation check 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.

    AFFECTED BY WAVE INTERFERENCE

  3. KEY DIAGNOSTIC MODE

    1. B224120E04

      Diagnostic mode inspection (indoor electrical key oscillator [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 in either of the 2 locations in the illustration, check that the wireless door lock buzzer sounds. Then repeat the check with the key in the other location.

    2. Diagnostic mode inspection (indoor electrical key oscillator [rear floor]).

      B455153E01

      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 in either of the 2 locations in the illustration, check that the wireless door lock buzzer sounds. Then repeat the check with the key in the other location.

    3. Diagnostic mode inspection (indoor electrical key oscillator [inside luggage]).

      B455154E01

      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 in either of the 2 locations in the illustration, check that the wireless door lock buzzer sounds. Then repeat the check with the key in the other location.

    Tip:

    • 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 oscillator (front floor, rear floor or inside luggage) is operating by sounding the buzzer.

    • If the buzzer does not sound for any indoor electrical key oscillators, the certification ECU circuit may have a malfunction.

    Table 1. 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

    Front, rear and luggage operation checks fail

    E

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

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

    INSPECT TRANSMITTER BATTERY (VOLTAGE)Click here

    REPLACE CERTIFICATION ECU

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

    U122408E02

    1. Disconnect the H51 ECU connector.

    2. Disconnect the H52 oscillator connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      H52-1 (CLG3) - H51-7 (CLG5)

      Always

      Below 1 Ω

      H52-3 (CLGB) - H51-8 (CG5B)

      Always

      Below 1 Ω

      H52-1 (CLG3) - Body ground

      Always

      10 kΩ or higher

      H52-3 (CLGB) - Body ground

      Always

      10 kΩ or higher
      Table 2. Text in Illustration

      *1

      Front view of wire harness connector

      (to Indoor Electrical Key Oscillator [Front Floor])

      *2

      Front view of wire harness connector

      (to Certification ECU)

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  5. CHECK INDOOR ELECTRICAL KEY OSCILLATOR (FRONT FLOOR)

    1. Disconnect the H52 oscillator connector.

      B455163E01

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

      Table 3. Waveform (Reference)

      Item

      Content

      Tester Connection

      H52-1 (CLG3) - H52-3 (CLGB)

      Tool Setting

      2 V/DIV, 2 μsec./DIV. (Reference)

      Condition

      Engine switch on (IG)

      OK

      Waveform is output normally (refer to illustration).

    REPLACE CERTIFICATION ECU

  6. REPLACE INDOOR ELECTRICAL KEY OSCILLATOR (FRONT FLOOR)

    1. Temporarily replace the indoor electrical key oscillator (front floor) with a new or normally functioning one (Click here).

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

    1. Check that the engine switch indicator is illuminated in green, push the engine switch, and check that the engine starts.

      OK

      Engine can be started.

    END (INDOOR ELECTRICAL KEY OSCILLATOR IS DEFECTIVE)

    REPLACE CERTIFICATION ECU

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

    1. U122409E02

      Disconnect the H51 ECU connector.

    2. Disconnect the N21 oscillator connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      N21-1 (CLG4) - H51-24 (CLG6)

      Always

      Below 1 Ω

      N21-3 (CLGB) - H51-25 (CG6B)

      Always

      Below 1 Ω

      N21-1 (CLG4) - Body ground

      Always

      10 kΩ or higher

      N21-3 (CLGB) - Body ground

      Always

      10 kΩ or higher
      Table 4. Text in Illustration

      *1

      Front view of wire harness connector

      (to Indoor Electrical Key Oscillator [Rear Floor])

      *2

      Front view of wire harness connector

      (to Certification ECU)

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  9. CHECK INDOOR ELECTRICAL KEY OSCILLATOR (REAR FLOOR)

    1. Disconnect the N21 oscillator connector.

      B455163E02

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

      Table 5. Waveform (Reference)

      Item

      Content

      Tester Connection

      H21-1 (CLG4) - H21-3 (CLGB)

      Tool Setting

      2 V/DIV, 2 μsec./DIV. (Reference)

      Condition

      Engine switch on (IG)

      OK

      Waveform is output normally (refer to illustration).

    REPLACE CERTIFICATION ECU

  10. REPLACE INDOOR ELECTRICAL KEY OSCILLATOR (REAR FLOOR)

    1. Temporarily replace the indoor electrical key oscillator (rear floor) with a new or normally functioning one (Click here).

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

    1. Check that the engine switch indicator is illuminated in green, push the engine switch, and check that the engine starts.

      OK

      Engine can be started.

    END (INDOOR ELECTRICAL KEY OSCILLATOR IS DEFECTIVE)

    REPLACE CERTIFICATION ECU

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

    1. U122410E02

      Disconnect the H51 ECU connector.

    2. Disconnect the P2 oscillator connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      P2-1 (CLG6) - H51-26 (CLG7)

      Always

      Below 1 Ω

      P2-3 (CLGB) - H51-27 (CG7B)

      Always

      Below 1 Ω

      P2-1 (CLG6) - Body ground

      Always

      10 kΩ or higher

      P2-3 (CLGB) - Body ground

      Always

      10 kΩ or higher
      Table 6. Text in Illustration

      *1

      Front view of wire harness connector

      (to Indoor Electrical Key Oscillator [Inside Luggage])

      *2

      Front view of wire harness connector

      (to Certification ECU)

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  13. CHECK INDOOR ELECTRICAL KEY OSCILLATOR (INSIDE LUGGAGE)

    1. Disconnect the P2 oscillator connector.

      B455163E03

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

      Table 7. Waveform (Reference)

      Item

      Content

      Tester Connection

      P2-1 (CLG6) - P2-3 (CLGB)

      Tool Setting

      2 V/DIV, 2 μsec./DIV. (Reference)

      Condition

      Engine switch on (IG)

      OK

      Waveform is output normally (Refer to illustration).

    REPLACE CERTIFICATION ECU

  14. REPLACE INDOOR ELECTRICAL KEY OSCILLATOR (INSIDE LUGGAGE)

    1. Temporarily replace the indoor electrical key oscillator (inside luggage) with a new or normally functioning one (Click here).

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

    1. Check that the engine switch indicator is illuminated in green, push the engine switch, and check that the engine starts.

      OK

      Engine can be started.

    END (INDOOR ELECTRICAL KEY OSCILLATOR IS DEFECTIVE)

    REPLACE CERTIFICATION ECU

  16. INSPECT TRANSMITTER BATTERY (VOLTAGE)

    1. B178429

      Remove the battery from the electrical key transmitter that does not operate (Click here).

    2. Attach a lead wire (0.6 mm (0.0236 in.) in diameter or less including wire sheath) with tape or equivalent to the negative terminal.

      Note:

      Do not wrap the lead wire around a terminal, wedge it between terminals, or solder it. A terminal may be deformed or damaged, and the battery will not be able to be installed correctly.

    3. Carefully pull the lead wire out from the position shown in the illustration and install the previously removed transmitter battery.

    4. B455160E01

      Using an oscilloscope, check the transmitter battery voltage waveform.

      Tip:

      When measuring the battery voltage, while operating the lock sensor of a door handle, bring the electrical key transmitter within the entry operating range to perform the measurement. For the entry operating range, refer to System Description (Click here).

      Standard Voltage

      Item

      Content

      Tester Connection

      Battery positive (+) - Battery negative (-)

      Tool Setting

      0.5 V/DIV., 100 ms/DIV.

      Condition

      Engine switch off, all doors closed and lock switch pushed

      Specified Condition

      2.5 to 3.2 V (Refer to the waveform)

    REPLACE TRANSMITTER BATTERY

    (Click here)

  17. CHECK ELECTRICAL KEY TRANSMITTER

    1. Check if there is another registered transmitter available.

      Table 8. Result

      Result

      Proceed to

      Another registered transmitter is not available

      A

      Another registered transmitter is available

      B

    CHECK ENTRY AND START SYSTEMClick here

  18. REPLACE ELECTRICAL KEY TRANSMITTER

    1. Replace the electrical key transmitter with a new or normally functioning one.

    2. Perform the registration procedure (Refer to Service Bulletin for registration).

  19. CHECK ENTRY AND START SYSTEM

    1. Check that the engine switch indicator is illuminated in green, push the engine switch, and check that the engine starts.

      OK

      Engine can be started.

    END (ELECTRICAL KEY TRANSMITTER IS DEFECTIVE)

    REPLACE CERTIFICATION ECU

  20. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - ENGINE SWITCH AND BODY GROUND)

    1. Disconnect the H71 connector.

      U122417E02
      Table 9. Text in Illustration

      *1

      Front view of wire harness connector

      (to Power Management Control ECU)

      *2

      Front view of wire harness connector

      (to Engine Switch)

    2. Disconnect the H53 switch connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      H53-7 (SS1) - H71-18 (SSW1)

      Always

      Below 1 Ω

      H53-2 (SS2) - H71-17 (SSW2)

      Always

      Below 1 Ω

      H53-7 (SS1) - Body ground

      Always

      10 kΩ or higher

      H53-2 (SS2) - Body ground

      Always

      10 kΩ or higher

      H53-5 (GND) - Body ground

      Always

      Below 1 Ω

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  21. INSPECT ENGINE SWITCH

    1. B226401E03

      for 1ZR-FAE:

      1. Remove the engine switch (Click here).

    2. for 2ZR-FAE:

      1. Remove the engine switch (Click here).

    3. for 1WW:

      1. Remove the engine switch (Click here).

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

      Standard Resistance

      Tester Connection

      Switch Condition

      Specified Condition

      7 (SS1) - 5 (GND)

      Engine switch pushed

      Below 1 Ω

      Engine switch not pushed

      10 kΩ or higher

      2 (SS2) - 5 (GND)

      Engine switch pushed

      Below 1 Ω

      Engine switch not pushed

      10 kΩ or higher
      Table 10. Result

      Result

      Proceed to

      OK (for LHD)

      A

      OK (for RHD)

      B

      NG

      C
      Tip:

      • If replacing the engine switch, refer to the procedures below.

    REPLACE POWER MANAGEMENT CONTROL ECU

    (Click here)

    REPLACE POWER MANAGEMENT CONTROL ECU

    (Click here)

    REPLACE ENGINE SWITCH