TIRE PRESSURE WARNING SYSTEM, Diagnostic DTC:C2126/26

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

DESCRIPTION

If ID registration via the automatic ID registration function is canceled or the tire pressure warning ECU and receiver does not receive data from the tire pressure warning valve and transmitters after the tire pressure warning valve and transmitter ID registration is completed using the GTS, the tire pressure warning ECU and receiver stores DTC C2126/26.

After ID registration is complete using the GTS, the tire pressure warning light illuminates after blinking for 1 minute. When the tire pressure warning ECU and receiver receives the data from all tire pressure warning valve and transmitters with registered IDs, the tire pressure is judged to be normal and the tire pressure warning light turns off.

DTC No. Detection Item DTC Detection Condition Trouble Area Note
C2126/26 Transmitter ID not Received in Main Mode

  • After transmitter ID registration is completed, ECU does not receive data in 1 trip from transmitters whose IDs are stored in ECU.

  • ID registration is canceled via the automatic ID registration function

  • Transmitter ID registration failure

  • Tire pressure warning valve and transmitter

  • Tire pressure warning ECU and receiver

 -

Note

If DTC C2126/26 is stored, C2128/28 may also be stored. If DTC C2128/28 is stored, perform troubleshooting for DTC C2128/28 before performing troubleshooting for DTC C2126/26.

Tech Tips

The purpose of this DTC is to help prevent delivering a vehicle that has incorrectly registered transmitter 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 go off after a little while, the transmitter IDs may be incorrectly registered.

CAUTION / NOTICE / HINT

Note


  • When replacing the tire pressure warning ECU and receiver or tire pressure warning valve and transmitter, read the transmitter IDs and number of the transmitters (4 or 5) stored in the old ECU using the GTS and write them down before removal.

  • It is necessary to perform initialization after 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.

PROCEDURE


  1. IDENTIFY TRANSMITTER NOT RECEIVED


    1. Set the tire pressure to the specified value.

      Click here

    2. Turn the ignition switch off.

    3. Connect the GTS to the DLC3.

    4. Turn the ignition switch to ON.

    5. Turn the GTS on.

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

    7. Display the "ID Tire Inflation Pressure" value for each wheel using the GTS.


      Chassis > Tire Pressure Monitor > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      ID 1 Tire Inflation Pressure ID1 tire inflation pressure

      min.: Absolute pressure (abs) / 0 kPa (0 kgf/cm2, 0 psi), Relative pressure (Gauge) / 0 kPa (0 kgf/cm2, 0 psi)

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

      		 Actual tire inflation pressure If N/A is displayed, data has not been received.*1
      ID 2 Tire Inflation Pressure ID2 tire inflation pressure

      min.: Absolute pressure (abs) / 0 kPa (0 kgf/cm2, 0 psi), Relative pressure (Gauge) / 0 kPa (0 kgf/cm2, 0 psi)

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

      		 Actual tire inflation pressure If N/A is displayed, data has not been received.*1
      ID 3 Tire Inflation Pressure ID3 tire inflation pressure

      min.: Absolute pressure (abs) / 0 kPa (0 kgf/cm2, 0 psi), Relative pressure (Gauge)/ 0 kPa (0 kgf/cm2, 0 psi)

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

      		 Actual tire inflation pressure If N/A is displayed, data has not been received.*1
      ID 4 Tire Inflation Pressure ID4 tire inflation pressure

      min.: Absolute pressure (abs) / 0 kPa (0 kgf/cm2, 0 psi), Relative pressure (Gauge) / 0 kPa (0 kgf/cm2, 0 psi)

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

      		 Actual tire inflation pressure If N/A is displayed, data has not been received.*1

      Tech Tips


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

      • The wheel position cannot be determined from ID1 through ID4 on the Data List.


      Chassis > Tire Pressure Monitor > Data List
      Tester Display
      ID 1 Tire Inflation Pressure
      ID 2 Tire Inflation Pressure
      ID 3 Tire Inflation Pressure
      ID 4 Tire Inflation Pressure

    8. Rapidly reduce the tire pressure for each wheel at least 40 kPa (0.4 kg/cm2, 5.8 psi) within 30 seconds. If the "ID Tire Inflation Pressure" value displayed on the GTS does not change, the tire pressure warning valve and transmitter corresponding to the unchanged "ID Tire Inflation Pressure" value was the cause of the output DTC.

      Tech Tips


      • Identify the malfunctioning tire pressure warning valve and transmitter by repeatedly decreasing the tire pressure for each tire.

      • Record which "ID Tire Inflation Pressure" value corresponds to each tire.

    9. Check the Data List.

      Note


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

      • When an "ID Tire Inflation Pressure" value 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 value.

      • Record the transmitter IDs and positions of transmitters that are normal.

    10. After confirming that the "ID Tire Inflation Pressure" value for one tire has changed, repeat this procedure one by one. Identify the transmitter not received.

      Result
      Result Proceed to
      Change in all tire inflation pressure data A
      No change in all tire inflation pressure data B
      No change in any tire inflation pressure data C

    A

    END

    C

    CHECK TRANSMITTER ID Click here

    B

  2. CHECK TRANSMITTER ID


    1. Turn the ignition switch off.

    2. Connect the GTS to the DLC3.

    3. Turn the ignition switch to ON.

    4. Turn the GTS on.

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

    6. Read the Data List according to the display on the GTS.


      Chassis > Tire Pressure Monitor > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Registered ID 1 Code Registered ID1 code

      min.: 0

      max.: FFFFFFF*1

      		 ID No. registered for transmitter ID1 displayed -
      Registered ID 2 Code Registered ID2 code

      min.: 0

      max.: FFFFFFF*1

      		 ID No. registered for transmitter ID2 displayed -
      Registered ID 3 Code Registered ID3 code

      min.: 0

      max.: FFFFFFF*1

      		 ID No. registered for transmitter ID3 displayed -
      Registered ID 4 Code Registered ID4 code

      min.: 0

      max.: FFFFFFF*1

      		 ID No. registered for transmitter ID4 displayed -

      Tech Tips


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

      • The wheel position cannot be determined from ID1 through ID4 on the Data List.


      Chassis > Tire Pressure Monitor > Data List
      Tester Display
      Registered ID 1 Code
      Registered ID 2 Code
      Registered ID 3 Code
      Registered ID 4 Code

    7. Disassemble all of the tires and check the tire pressure warning valve and transmitter IDs.

      B008753C04
      *1 Tire Pressure Warning Valve and Transmitter - -
      *a Transmitter ID (7-digit Number) *b Wheel Speed Type Tire Inflation Pressure Display Function Identification Mark

      Note

      For vehicles equipped with the wheel speed type tire inflation pressure display function, be sure to use tire pressure warning valve and transmitters with identification marks.

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

      Result
      Result Proceed to
      Match A
      Do not match B

    A

    REPLACE TIRE PRESSURE WARNING ECU AND RECEIVER Click here

    B

    GO TO STEP 4 Click here

  3. CHECK TRANSMITTER ID


    1. Turn the ignition switch off.

    2. Connect the GTS to the DLC3.

    3. Turn the ignition switch to ON.

    4. Turn the GTS on.

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

    6. Read the Data List according to the display on the GTS.


      Chassis > Tire Pressure Monitor > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Registered ID 1 Code Registered ID1 code

      min.: 0

      max.: FFFFFFF*1

      		 ID No. registered for transmitter ID1 displayed -
      Registered ID 2 Code Registered ID2 code

      min.: 0

      max.: FFFFFFF*1

      		 ID No. registered for transmitter ID2 displayed -
      Registered ID 3 Code Registered ID3 code

      min.: 0

      max.: FFFFFFF*1

      		 ID No. registered for transmitter ID3 displayed -
      Registered ID 4 Code Registered ID4 code

      min.: 0

      max.: FFFFFFF*1

      		 ID No. registered for transmitter ID4 displayed -

      Tech Tips


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

      • The wheel position cannot be determined from ID1 through ID4 on the Data List.


      Chassis > Tire Pressure Monitor > Data List
      Tester Display
      Registered ID 1 Code
      Registered ID 2 Code
      Registered ID 3 Code
      Registered ID 4 Code

    7. Disassemble all of the tires and check the tire pressure warning valve and transmitter IDs.

      B008753C04
      *1 Tire Pressure Warning Valve and Transmitter - -
      *a Transmitter ID (7-digit Number) *b Wheel Speed Type Tire Inflation Pressure Display Function Identification Mark

      Note

      For vehicles equipped with the wheel speed type tire inflation pressure display function, be sure to use tire pressure warning valve and transmitters with identification marks.

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

      Result
      Result Proceed to
      Match A
      Do not match B

    A

    REPLACE CORRESPONDING TIRE PRESSURE WARNING VALVE AND TRANSMITTER Click here

    B

  4. REGISTRATION OF TRANSMITTER ID


    1. Perform registration.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  5. PERFORM INITIALIZATION


    1. Perform initialization.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

    END