TIRE PRESSURE WARNING SYSTEM, Diagnostic DTC:C2126/26

DTC Code DTC Name
C2126/26 Transmitter ID not Received in Main Mode

DESCRIPTION

After all IDs are registered, DTC C2126/26 is set in the tire pressure warning ECU and receiver and the tire pressure warning light blinks for 1 minute and then illuminates.

When the tire pressure warning ECU and receiver successfully receives radio waves from all the transmitters whose IDs are stored in the ECU, DTC C2126/26 is cleared and the tire pressure warning light goes off.

DTC No. DTC Detection Condition Trouble Area
C2126/26 After ID registration is completed, ECU does not receive radio waves from transmitters whose IDs are stored in ECU.

  • ID registration failure

  • Tire pressure warning valve and transmitter

  • Tire pressure warning ECU and receiver

Tech Tips

The purpose of this DTC is to help prevent delivering a vehicle that has incorrectly registered IDs. After all IDs are registered, DTC C2126/26 is detected and the tire pressure warning light blinks for 1 minute and then illuminates. If the tire pressure warning light does not turn off after a little while, IDs may be incorrectly registered.

WIRING DIAGRAM

A01HMOYE01

INSPECTION PROCEDURE

Note


  • When replacing the tire pressure warning ECU and receiver, read the transmitter IDs stored in the old ECU using the Techstream and write them down before removal.

  • It is necessary to perform registration Click here of the transmitter IDs into the tire pressure warning ECU and receiver if the ECU and/or one of the valve and transmitters has been replaced.

  • When replacing the tire pressure warning ECU and receiver on vehicles equipped with the wireless door lock control system (w/o smart key system), be sure to perform Registration of Recognition Code to register the transmitter IDs after ECU replacement Click here.

PROCEDURE


  1. IDENTIFY TRANSMITTER NOT RECEIVED


    1. Set the tire pressure to the specified values Click here.

    2. Turn the ignition switch off.

    3. Connect the Techstream to the DLC3.

    4. Turn the ignition switch to ON.

    5. Turn the Techstream on.

    6. Enter the following menus: Chassis / Tire Pressure Monitor / Data List.

    7. Check the values by referring to the table below.

      Tire Pressure Monitor
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      ID1 Tire Inflation Pressure

      ID1 tire inflation pressure/

      min.: Absolute pressure / 50 kPa (0.5 kgf/cm2, 7 psi), Relative pressure / -50 kPa (-0.5 kgf/cm2, -7 psi)

      max.: Absolute pressure / 480 kPa (4.9 kgf/cm2, 70 psi), Relative pressure / 380 kPa (3.9 kgf/cm2, 55 psi)

      		 Actual tire inflation pressure

      If 50 kPa (0.5 kgf/cm2, 7 psi) is displayed for absolute pressure or -50 kPa (-0.5 kgf/cm2, -7 psi) is displayed for relative pressure, data has not been received.*
      ID2 Tire Inflation Pressure

      ID2 tire inflation pressure /

      min.: Absolute pressure / 50 kPa (0.5 kgf/cm2, 7 psi), Relative pressure / -50 kPa (-0.5 kgf/cm2, -7 psi)

      max.: Absolute pressure / 480 kPa (4.9 kgf/cm2, 70 psi), Relative pressure / 380 kPa (3.9 kgf/cm2, 55 psi)

      		 Actual tire inflation pressure

      If 50 kPa (0.5 kgf/cm2, 7 psi) is displayed for absolute pressure or -50 kPa (-0.5 kgf/cm2, -7 psi) is displayed for relative pressure, data has not been received.*
      ID3 Tire Inflation Pressure

      ID3 tire inflation pressure /

      min.: Absolute pressure / 50 kPa (0.5 kgf/cm2, 7 psi), Relative pressure / -50 kPa (-0.5 kgf/cm2, -7 psi)

      max.: Absolute pressure / 480 kPa (4.9 kgf/cm2, 70 psi), Relative pressure / 380 kPa (3.9 kgf/cm2, 55 psi)

      		 Actual tire inflation pressure

      If 50 kPa (0.5 kgf/cm2, 7 psi) is displayed for absolute pressure or -50 kPa (-0.5 kgf/cm2, -7 psi) is displayed for relative pressure, data has not been received.*
      ID4 Tire Inflation Pressure

      ID4 tire inflation pressure /

      min.: Absolute pressure / 50 kPa (0.5 kgf/cm2, 7 psi), Relative pressure / -50 kPa (-0.5 kgf/cm2, -7 psi)

      max.: Absolute pressure / 480 kPa (4.9 kgf/cm2, 70 psi), Relative pressure / 380 kPa (3.9 kgf/cm2, 55 psi)

      		 Actual tire inflation pressure

      If 50 kPa (0.5 kgf/cm2, 7 psi) is displayed for absolute pressure or -50 kPa (-0.5 kgf/cm2, -7 psi) is displayed for relative pressure, data has not been received.*

      Tech Tips

      *: It may take a few minutes until the values are displayed.

    8. Rapidly reduce the tire pressure for each wheel at least 40 kPa (0.4 kgf/cm2, 5.8 psi) within 30 seconds.

    9. Check the Data List.

      Note


      • It may take a few minutes to display the updated tire pressure data.

      • When the "ID Tire Inflation Pressure" data has not changed, reset the tire pressure to the appropriate specified value and rotate the tire 90 to 270 degrees. Then rapidly release the tire pressure and recheck the data.

      • Record the "ID Tire Inflation Pressure" data transmitter ID that corresponds to each tire.

    10. After confirming that the "ID Tire Inflation Pressure" data for one tire (ID1 to ID4) has changed, repeat this procedure one by one. Identify the transmitter not received.

      Result
      Condition Proceed to
      One or more of transmitters abnormal A
      All normal B

    B

    END

    A

  2. CHECK TRANSMITTER ID


    1. Turn the ignition switch off.

    2. Connect the Techstream to the DLC3.

    3. Turn the ignition switch to ON.

    4. Turn the Techstream on.

    5. Enter the following menus: Chassis / Tire Pressure Monitor / Data List.

    6. Check the values by referring to the table below.

      Tire Pressure Monitor
      Tester Display Measurement Item/Display Normal Condition Diagnostic Note
      Registered ID1 Code

      Registered ID1 code/

      min.: 0

      max.: FFFFFFF*

      		 ID No. registered for transmitter ID1 displayed -
      Registered ID2 Code

      Registered ID2 code/

      min.: 0

      max.: FFFFFFF*

      		 ID No. registered for transmitter ID2 displayed -
      Registered ID3 Code

      Registered ID3 code/

      min.: 0

      max.: FFFFFFF*

      		 ID No. registered for transmitter ID3 displayed -
      Registered ID4 Code

      Registered ID4 code/

      min.: 0

      max.: FFFFFFF*

      		 ID No. registered for transmitter ID4 displayed -

      Tech Tips

      *: Displayed only when the ID No. is not registered.

    7. Check the ID number on the identified transmitter by removing it from the tire and wheel.

      A01HPXPE01
      Text in Illustration
      *1 Tire pressure warning valve and transmitter *2 Transmitter ID (7-digit number)

    8. Confirm that the ID number on the transmitter and recorded transmitter ID match.

      Result
      Result Proceed to
      Match A
      Do not match B

    B

    REGISTRATION OF TRANSMITTER ID Click here

    A

  3. REPLACE TIRE PRESSURE WARNING VALVE AND TRANSMITTER


    1. Replace the tire pressure warning valve and transmitter Click here.


    NEXT

  4. REGISTRATION OF TRANSMITTER ID


    1. Perform registration Click here.


    NEXT

  5. CONFIRM TIRE INFLATION PRESSURE (DATA LIST)


    1. Turn the ignition switch off.

    2. Connect Techstream to the DLC3.

    3. Turn the ignition switch to ON.

    4. Turn the Techstream on.

    5. Enter the following menus: Chassis / Tire Pressure Monitor / Data List.

    6. Check the values by referring to the table below.

      Tire Pressure Monitor
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      ID1 Tire Inflation Pressure

      ID1 tire inflation pressure/

      min.: Absolute pressure / 50 kPa (0.5 kgf/cm2, 7 psi), Relative pressure / -50 kPa (-0.5 kgf/cm2, -7 psi)

      max.: Absolute pressure / 480 kPa (4.9 kgf/cm2, 70 psi), Relative pressure / 380 kPa (3.9 kgf/cm2, 55 psi)

      		 Actual tire inflation pressure

      If 50 kPa (0.5 kgf/cm2, 7 psi) is displayed for absolute pressure or -50 kPa (-0.5 kgf/cm2, -7 psi) is displayed for relative pressure, data has not been received.*
      ID2 Tire Inflation Pressure

      ID2 tire inflation pressure /

      min.: Absolute pressure / 50 kPa (0.5 kgf/cm2, 7 psi), Relative pressure / -50 kPa (-0.5 kgf/cm2, -7 psi)

      max.: Absolute pressure / 480 kPa (4.9 kgf/cm2, 70 psi), Relative pressure / 380 kPa (3.9 kgf/cm2, 55 psi)

      		 Actual tire inflation pressure

      If 50 kPa (0.5 kgf/cm2, 7 psi) is displayed for absolute pressure or -50 kPa (-0.5 kgf/cm2, -7 psi) is displayed for relative pressure, data has not been received.*
      ID3 Tire Inflation Pressure

      ID3 tire inflation pressure /

      min.: Absolute pressure / 50 kPa (0.5 kgf/cm2, 7 psi), Relative pressure / -50 kPa (-0.5 kgf/cm2, -7 psi)

      max.: Absolute pressure / 480 kPa (4.9 kgf/cm2, 70 psi), Relative pressure / 380 kPa (3.9 kgf/cm2, 55 psi)

      		 Actual tire inflation pressure

      If 50 kPa (0.5 kgf/cm2, 7 psi) is displayed for absolute pressure or -50 kPa (-0.5 kgf/cm2, -7 psi) is displayed for relative pressure, data has not been received.*
      ID4 Tire Inflation Pressure

      ID4 tire inflation pressure /

      min.: Absolute pressure / 50 kPa (0.5 kgf/cm2, 7 psi), Relative pressure / -50 kPa (-0.5 kgf/cm2, -7 psi)

      max.: Absolute pressure / 480 kPa (4.9 kgf/cm2, 70 psi), Relative pressure / 380 kPa (3.9 kgf/cm2, 55 psi)

      		 Actual tire inflation pressure

      If 50 kPa (0.5 kgf/cm2, 7 psi) is displayed for absolute pressure or -50 kPa (-0.5 kgf/cm2, -7 psi) is displayed for relative pressure, data has not been received.*

      Tech Tips


      • *: It may take a few minutes until the values are displayed.

      • When no "ID Tire Inflation Pressure" data has changed, reset the tire pressure to the appropriate specified value and rotate the tire 90 to 270 degrees. Then rapidly release the tire pressure and recheck the data.

        Result
        Result Proceed to
        Tire pressure values are not displayed. A
        All tire pressure readings are equal to specified values. B

    B

    END

    A

    REPLACE TIRE PRESSURE WARNING ECU AND RECEIVER Click here