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 stored 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

C2126/26

Transmitter ID not Received in Main Mode

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
Note:

Even when the 2nd set of tires is selected via the ID switching function, (Main) is displayed on the DTC screen for the DTCs.

Tip:

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

C257450E12

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 (Click here) 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 values.

      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. 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) / 488.72 kPa (4.9 kgf/cm2, 70 psi), Relative pressure (Gauge) / 388.72kPa (3.9 kgf/cm2, 56 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) / 488.72 kPa (4.9 kgf/cm2, 70 psi), Relative pressure (Gauge) / 388.72kPa (3.9 kgf/cm2, 56 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) / 488.72 kPa (4.9 kgf/cm2, 70 psi), Relative pressure (Gauge) / 388.72kPa (3.9 kgf/cm2, 56 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) / 488.72 kPa (4.9 kgf/cm2, 70 psi), Relative pressure (Gauge) / 388.72kPa (3.9 kgf/cm2, 56 psi)

      Actual tire inflation pressure

      If N/A is displayed, data has not been received.*

      ID 5 Tire Inflation Pressure

      ID5 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) / 488.72 kPa (4.9 kgf/cm2, 70 psi), Relative pressure (Gauge) / 388.72kPa (3.9 kgf/cm2, 56 psi)

      Actual tire inflation pressure

      • If N/A is displayed, data has not been received.*

      • w/ Full Size Spare Tire
      Tip:

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

      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

      ID 5 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.

    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 transmitter ID of which "ID Tire Inflation Pressure" data corresponds to each tire.

    10. After confirming that the "ID Tire Inflation Pressure" data for one tire has changed, repeat this procedure one by one. Identify the transmitter that corresponds to the DTC.

    Result

    Proceed to

    One or more of transmitters abnormal

    All normal
    All normal

    END

    One or more of transmitters abnormal

  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. 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*

      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

      -

      Registered ID 5 Code

      Registered ID5 code

      min.: 0, max.: FFFFFFF*

      ID No. registered for transmitter ID5 displayed

      w/ Full Size Spare Tire
      Tip:

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

      Chassis > Tire Pressure Monitor > Data List

      Tester Display

      Registered ID 1 Code

      Registered ID 2 Code

      Registered ID 3 Code

      Registered ID 4 Code

      Registered ID 5 Code

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

      C239103C05

      *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

      Proceed to

      Match

      Do not match
    Do not match

    REGISTRATION OF TRANSMITTER IDClick here

    Match

  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 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. 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) / 488.72 kPa (4.9 kgf/cm2, 70 psi), Relative pressure (Gauge) / 388.72kPa (3.9 kgf/cm2, 56 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) / 488.72 kPa (4.9 kgf/cm2, 70 psi), Relative pressure (Gauge) / 388.72kPa (3.9 kgf/cm2, 56 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) / 488.72 kPa (4.9 kgf/cm2, 70 psi), Relative pressure (Gauge) / 388.72kPa (3.9 kgf/cm2, 56 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) / 488.72 kPa (4.9 kgf/cm2, 70 psi), Relative pressure (Gauge) / 388.72kPa (3.9 kgf/cm2, 56 psi)

      Actual tire inflation pressure

      If N/A is displayed, data has not been received.*

      ID 5 Tire Inflation Pressure

      ID5 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) / 488.72 kPa (4.9 kgf/cm2, 70 psi), Relative pressure (Gauge) / 388.72kPa (3.9 kgf/cm2, 56 psi)

      Actual tire inflation pressure

      • If N/A is displayed, data has not been received.*

      • w/ Full Size Spare Tire
      Tip:

      • *: 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.

      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

      ID 5 Tire Inflation Pressure

      Result

      Proceed to

      Tire pressure values are not displayed.

      All tire pressure readings are equal to specified values.
    Tire pressure values are not displayed.

    REPLACE TIRE PRESSURE WARNING ECU AND RECEIVER

    Click here

    All tire pressure readings are equal to specified values.

    END