TIRE PRESSURE WARNING SYSTEM, Diagnostic DTC:C2126

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

DESCRIPTION

After the tire pressure warning valve and transmitter ID registration is completed using the GTS or ID registration was canceled via the automatic ID registration function, DTC C2126 is output from the tire pressure warning ECU and receiver.

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 Transmitter ID not Received in Main Mode

  • Data cannot be received from all registered transmitter ID's for 1 trip after transmitter ID registration is completed

  • When the ID registration operation 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 is output, C2128 may be output simultaneously. In this case, first perform troubleshooting for C2128 first and then perform troubleshooting for C2126.

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 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, first use the GTS to record all of the current IDs and registered tires with transmitters (4 or 5 tires) of the tire pressure warning valve and transmitter registered to the tire pressure warning ECU and receiver.

  • 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 engine switch off.

    3. Connect the GTS to the DLC3.

    4. Turn the engine 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. Check the value by referring to the following table.


      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.*
      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.*
      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.*
      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.*

      Tech Tips


      • *: 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

    9. Decrease quickly the tire pressure of 1 wheel by 40 kPa (0.4 kgf/cm2) or more within 30 seconds, and then check the value on the Data List.

      GTS Display Status Faulty Tire Pressure Warning Valve and Transmitter
      The "ID Tire Inflation Pressure" data changes. Normal tire pressure warning valve and transmitter
      The "ID Tire Inflation Pressure" data does not change. Tire pressure warning valve and transmitter that matches the DTC.

    10. Repeat the above procedure for each of the remaining tires, and determine the pressure warning valve and transmitter corresponding to the DTC.

      Note

      Repeat the above procedure for each of the remaining tires, and determine the pressure warning valve and transmitter corresponding to the DTC.

      Tech Tips


      • 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.

    11. Check all tire pressure warning valve and transmitters.

      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 engine switch off.

    2. Connect the GTS to the DLC3.

    3. Turn the engine switch on (IG).

    4. Turn the GTS on.

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

    6. Refer to the following chart and record all of the tire pressure warning valve and transmitter IDs.


      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*

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

      min.: 0

      max.: FFFFFFF*

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

      min.: 0

      max.: FFFFFFF*

      		 ID No. registered for transmitter ID3 displayed -
      Registered ID 4 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.

      • 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.

      B006D0TC01
      *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 except RHD and w/ Light Auto Turn-off System (w/ Delay Function): REPLACE TIRE PRESSURE WARNING ECU AND RECEIVER Click here
    REPLACE TIRE PRESSURE WARNING ECU AND RECEIVER for RHD and w/ Light Auto Turn-off System (w/ Delay Function): REPLACE TIRE PRESSURE WARNING ECU AND RECEIVER Click here

    B

    GO TO STEP 4 Click here

  3. CHECK TRANSMITTER ID


    1. Turn the engine switch off.

    2. Connect the GTS to the DLC3.

    3. Turn the engine switch on (IG).

    4. Turn the GTS on.

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

    6. Refer to the following chart and record all of the tire pressure warning valve and transmitter IDs.


      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*

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

      min.: 0

      max.: FFFFFFF*

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

      min.: 0

      max.: FFFFFFF*

      		 ID No. registered for transmitter ID3 displayed -
      Registered ID 4 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.

      • 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.

      B006D0TC01
      *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 ID registration for the tire pressure warning valve and receiver.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  5. PERFORM INITIALIZATION


    1. Set the tire pressure to the specified value.

      Click here

    2. Initialize the tire pressure warning system.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

    END