TIRE PRESSURE WARNING SYSTEM, Diagnostic DTC:C2121/21,C2122/22,C2123/23,C2124/24,C2125/25,C2181/81,C2182/82,C2183/83,C2184/84 and C2185/85

DTC Code DTC Name
C2121/21 No Signal from Transmitter ID1
C2122/22 No Signal from Transmitter ID2
C2123/23 No Signal from Transmitter ID3
C2124/24 No Signal from Transmitter ID4
C2125/25 No Signal from Transmitter ID5
C2181/81 Transmitter ID1 not Received (Test Mode DTC)
C2182/82 Transmitter ID2 not Received (Test Mode DTC)
C2183/83 Transmitter ID3 not Received (Test Mode DTC)
C2184/84 Transmitter ID4 not Received (Test Mode DTC)
C2185/85 Transmitter ID5 not Received (Test Mode DTC)

DESCRIPTION

The tire pressure warning valve and transmitters that are installed in the tire and wheel assemblies measure the tire pressure of each wheel. The measured values are transmitted to the tire pressure warning ECU and receiver in the vehicle as radio waves. The ECU compares the measured tire pressure values with the tire pressure threshold. When the measured tire pressure value is less than this threshold, the warning light in the combination meter assembly illuminates.

The tire pressure warning valve and transmitters constantly send radio waves to the tire pressure warning ECU and receiver.

Under the conditions below, the tire pressure warning ECU and receiver is unable to receive the signals from the tire pressure warning valve and transmitters, and a DTC is stored.

  • Facilities or devices that use similar radio frequencies are located in the vicinity of the vehicle.

  • Devices using similar radio frequencies are used in the vehicle.

  • The ID of a tire pressure warning valve and transmitter is mistyped during registration.

  • A tire, wheel and/or transmitter from a different vehicle is installed.

Tip:

When no transmitter ID is received from a tire pressure warning valve and transmitter for 10 minutes or more while the vehicle speed is more than 37 km/h (23 mph), a DTC from C2121/21 to C2124/24 (C2125/25: w/ Full Size Spare Tire) is stored.

DTCs C2121/21 to C2124/24 (C2125/25: w/ Full Size Spare Tire) can only be cleared by using the GTS. DTCs C2181/81 to C2184/84 (C2185/85: w/ Full Size Spare Tire) can be cleared when the tire pressure warning valve and transmitter sends a forced transmission signal or test mode ends. DTCs C2181/81 to C2184/84 (C2185/85: w/ Full Size Spare Tire) are output only in test mode.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

Note

C2121/21

No Signal from Transmitter ID1

All conditions below are met:

  • Tire pressure warning valve and transmitter is not in stop mode.

  • Any transmitter ID is not received from tire pressure warning valve and transmitters.

  • Vehicle speed is more than 37 km/h (23 mph) or no vehicle speed signal is received for 10 minutes or more.

  • Tire pressure warning valve and transmitter

  • Tire pressure warning ECU and receiver

-

C2122/22

No Signal from Transmitter ID2

All conditions below are met:

  • Tire pressure warning valve and transmitter is not in stop mode.

  • Any transmitter ID is not received from tire pressure warning valve and transmitters.

  • Vehicle speed is more than 37 km/h (23 mph) or no vehicle speed signal is received for 10 minutes or more.

  • Tire pressure warning valve and transmitter

  • Tire pressure warning ECU and receiver

-

C2123/23

No Signal from Transmitter ID3

All conditions below are met:

  • Tire pressure warning valve and transmitter is not in stop mode.

  • Any transmitter ID is not received from tire pressure warning valve and transmitters.

  • Vehicle speed is more than 37 km/h (23 mph) or no vehicle speed signal is received for 10 minutes or more.

  • Tire pressure warning valve and transmitter

  • Tire pressure warning ECU and receiver

-

C2124/24

No Signal from Transmitter ID4

All conditions below are met:

  • Tire pressure warning valve and transmitter is not in stop mode.

  • Any transmitter ID is not received from tire pressure warning valve and transmitters.

  • Vehicle speed is more than 37 km/h (23 mph) or no vehicle speed signal is received for 10 minutes or more.

  • Tire pressure warning valve and transmitter

  • Tire pressure warning ECU and receiver

-

C2125/25

No Signal from Transmitter ID5

All conditions below are met:

  • Tire pressure warning valve and transmitter is not in stop mode.

  • Any transmitter ID is not received from tire pressure warning valve and transmitters.

  • Vehicle speed is more than 37 km/h (23 mph) or no vehicle speed signal is received for 10 minutes or more.

  • Tire pressure warning valve and transmitter

  • Tire pressure warning ECU and receiver

w/ Full Size Spare Tire

C2181/81

Transmitter ID1 not Received (Test Mode DTC)

Test mode procedure is performed.

  • Tire pressure warning valve and transmitter

  • Tire pressure warning ECU and receiver

-

C2182/82

Transmitter ID2 not Received (Test Mode DTC)

Test mode procedure is performed.

  • Tire pressure warning valve and transmitter

  • Tire pressure warning ECU and receiver

-

C2183/83

Transmitter ID3 not Received (Test Mode DTC)

Test mode procedure is performed.

  • Tire pressure warning valve and transmitter

  • Tire pressure warning ECU and receiver

-

C2184/84

Transmitter ID4 not Received (Test Mode DTC)

Test mode procedure is performed.

  • Tire pressure warning valve and transmitter

  • Tire pressure warning ECU and receiver

-

C2185/85

Transmitter ID5 not Received (Test Mode DTC)

Test mode procedure is performed.

  • Tire pressure warning valve and transmitter

  • Tire pressure warning ECU and receiver

w/ Full Size Spare Tire
Note:

When DTCs C2121/21 to C2124/24 (C2125/25: w/ Full Size Spare Tire) are set, DTC C2179/79 may be set simultaneously. In such cases, troubleshoot DTCs C2121/21 to C2124/24 (C2125/25: w/ Full Size Spare Tire) first, then troubleshoot DTC C2179/79.

Tip:

It is necessary to perform the following procedure to identify the tire pressure warning valve and transmitter that is malfunctioning because it cannot be identified by the output DTC.

WIRING DIAGRAM

C269188E03

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 initializationClick hereafter registrationClick hereof 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. CHECK FREQUENCY RECEIVING CONDITION

    1. Check that the following conditions are not met:

      1. Facilities or devices that use similar radio frequencies are located in the vicinity of the vehicle.

        Tip:

        If the vehicle is located in an area such as the one described above, the tire pressure warning light may illuminate after blinking for 1 minute due to interfering radio frequencies.

      2. Devices using similar radio frequencies are used in the vehicle.

        OK

        Facilities or devices that use similar radio frequencies are not located in the vicinity of the vehicle.

        Tip:

        Radio transmissions may be interrupted due to the surroundings or devices installed by the user.

    Result

    Proceed to

    OK

    NG
    NG

    CHECK IF ANY DEVICE IS INSTALLED BY USER

    OK

  2. IDENTIFY TRANSMITTER CORRESPONDING TO DTC

    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.

    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.

      Tip:

      • 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

      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) / 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

      • *2

      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
      Tip:

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

      • *2: w/ Full Size Spare 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 that corresponds to the DTC.

    Result

    Result

    Proceed to

    One or more transmitter is abnormal

    A

    All transmitters are normal

    B
    B

    END

    A

  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. 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

      -

      Registered ID 5 Code

      Registered ID5 code

      min.: 0

      max.: FFFFFFF*1

      ID No. registered for transmitter ID5 displayed

      *2

      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
      Tip:

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

      • *2: w/ Full Size Spare Tire

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

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

    C239103C13

    *1

    Tire Pressure Warning Valve and Transmitter

    *2

    Transmitter ID (7-digit Number)

    Result

    Result

    Proceed to

    Match

    A

    Do not match

    B
    B

    REGISTRATION OF TRANSMITTER IDClick here

    A

  4. REPLACE TIRE PRESSURE WARNING VALVE AND TRANSMITTER

    1. Replace the tire pressure warning valve and transmitter.

      Click here

    Result

    Proceed to

    NEXT
    NEXT

  5. REGISTRATION OF TRANSMITTER ID

    1. Perform registration.

      Click here

    Result

    Proceed to

    NEXT
    NEXT

  6. PERFORM INITIALIZATION

    1. Perform initialization.

      Click here

    Result

    Proceed to

    NEXT
    NEXT

  7. 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) / 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

      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) / 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

      • *2

      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
      Tip:

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

      • *2: w/ Full Size Spare Tire

      • 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