TIRE PRESSURE WARNING SYSTEM, Diagnostic DTC:C2126/26

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

DESCRIPTION

After all transmitter IDs are registered, DTC C2126/26 is stored t 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. 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 radio waves from transmitters whose IDs are stored in ECU.

  • Transmitter ID registration failure

  • Tire pressure warning valve and transmitter

  • Tire pressure warning ECU and receiver

 -

Note

w/ ID Switching Function:

(Main) is displayed on the DTC screen for the DTCs even when the 2nd set of tires is selected.

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.

WIRING DIAGRAM

A01MU0DE06

CAUTION / NOTICE / HINT

Note


  • When replacing the tire pressure warning ECU and receiver, read the transmitter IDs 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 power switch off.

    3. Connect the GTS to the DLC3.

    4. Turn the power switch on (IG).

    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.

    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.


      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

      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

      Tech Tips

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

    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
      One or more transmitter is abnormal A
      All transmitters are normal B

    B

    END

    A

  2. CHECK TRANSMITTER ID


    1. Turn the power switch off.

    2. Connect the GTS to the DLC3.

    3. Turn the power switch on (IG).

    4. Turn the GTS on.

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

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


      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 -

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

      Tech Tips

      *1: 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.

      A01MS0ZC13
      *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

    GO TO STEP 4 Click here

    A

  3. REPLACE TIRE PRESSURE WARNING VALVE AND TRANSMITTER


    1. Replace the tire pressure warning valve and transmitter.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  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

  6. CONFIRM TIRE INFLATION PRESSURE (DATA LIST)


    1. Turn the power switch off.

    2. Connect GTS to the DLC3.

    3. Turn the power switch on (IG).

    4. Turn the GTS on.

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

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


      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

      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

      Tech Tips


      • *1: 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.

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

    A

    REPLACE TIRE PRESSURE WARNING ECU AND RECEIVER Click here

    B

    END