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Home >> Lexus >> 2007 >> GS 450h >> Repair and Diagnosis (Single Page) >> Suspension >> Wheels & Tire System >> Tire & Wheel >> Tire Pressure Warning System >> DTC C2121/21 No Signal from Transmitter ID1 in Main Mode; DTC C2111/11 Transmitter ID1 Operation Stop; DTC C2112/12 Transmitter ID2 Operation Stop; DTC C2113/13 Transmitter ID3 Operation Stop; DTC C2114/14 Transmitter ID4 Operation Stop; DTC C2122/22 No Signal from Transmitter ID2 in Main Mode; DTC C2123/23 No Signal from Transmitter ID3 in Main Mode; DTC C2124/24 No Signal from Transmitter ID4 in Main Mode; DTC C2131/31 No Signal from Transmitter ID1 in 2nd Mode; DTC C2132/32 No Signal from Transmitter ID2 in 2nd Mode; DTC C2133/33 No Signal from Transmitter ID3 in 2nd Mode; DTC C2134/34 No Signal from Transmitter ID4 in 2nd Mode; DTC C2181/81 Transmitter ID1 not Received (Test Mode DTC); DTC C2182/82 Transmitter ID2 not Received (Test Mode DTC); DTC C2183/83 Transmitter ID3 not Received (Test Mode DTC); DTC C2184/84 Transmitter ID4 not Received (Test Mode DTC) >> Inspection Procedure
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Inspection Procedure

NOTE:
  • When replacing the tire pressure warning ECU, read the IDs stored in the ECU using the intelligent tester and note them down before removal.
  • It is necessary to perform initialization (see INITIALIZATION  ) after registration (see REGISTRATION  ) of the transmitter IDs into the tire pressure warning ECU after the ECU and/or valve and transmitter has been replaced.

HINT:

Set the tire pressure to the specified value.

Standard pressure: 

240 kPa (2.4 kgf/cm 2  , 35 psi) 

  1. CHECK FREQUENCY RECEIVING CONDITION 
    1. Check if the vehicle is located in areas as described below:
      1. Areas, facilities or devices that use similar radio frequencies are located in the vicinity of the vehicle.

        HINT:

        If the vehicle is located in areas described above, the tire pressure warning light may come on only in a particular area.

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

      HINT:

      Radio frequency may be interrupted according to surroundings or devices installed by user.

    NG: CHECK IF ANY DEVICE IS INSTALLED BY USER 

    OK: GO TO Next Step 

  2. CHECK DTC 
    1. Check for a DTC (see DTC CHECK / CLEAR  ).

      Result 

      RESULT

      Condition Proceed to
      Any of the DTCs from C2111/11 to C2114/14 are output. A
      Any of the DTCs from C2121/21 to C2124/24 are output. B

    B:  GO TO step  4

    A: GO TO Next Step 

  3. PERFORM FORCED TRANSMISSION OF TRANSMITTER ID OF 4 WHEELS 
    1. Set the tire pressure to the specified value.
    2. Connect the intelligent tester (with CAN VIM) to the DLC3.
    3. Turn the power switch ON (IG) and turn the tester ON.
    4. Select "TIREPRESS" by following the prompts displayed on the intelligent tester.

      Tire pressure warning ECU 

      DATA LIST

      Item Measurement Item/Range (display) Normal Condition
      TIREPRESS1 ID1 tire inflation pressure/ min.: 0 kPa (0 kgf/cm2 , 0 psi), max.: 637.5 kPa (6.48 kgf/cm2 , 92.2 psi) Actual tire inflation pressure
      TIREPRESS2 ID2 tire inflation pressure/ min.: 0 kPa (0 kgf/cm2 , 0 psi), max.: 637.5 kPa (6.48 kgf/cm2 , 92.2 psi) Actual tire inflation pressure
      TIREPRESS3 ID3 tire inflation pressure/ min.: 0 kPa (0 kgf/cm2 , 0 psi), max.: 637.5 kPa (6.48 kgf/cm2 , 92.2 psi) Actual tire inflation pressure
      TIREPRESS4 ID4 tire inflation pressure/ min.: 0 kPa (0 kgf/cm2 , 0 psi), max.: 637.5 kPa (6.48 kgf/cm2 , 92.2 psi) Actual tire inflation pressure
    5. Rapidly reduce the pressures from each wheel by approximately 40 kPa (0.4 kgf/cm2 , 5.8 psi)/30 seconds or more.
    6. Check that each tire pressure data displayed on the intelligent tester screen has changed.

      OK: 

      Each tire pressure data displayed on the intelligent tester screen will change to the value of the tire pressure. 

      NOTE:
      • It takes about 1 minute or more to display the updated tire pressure data.
      • When the "TIREPRESS" 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 it.
    7. After confirming that all of the tire pressure data displayed on the intelligent tester screen have changed, set the tire pressures to the appropriate specified values.

      HINT:

      If the tire pressure data displayed on the intelligent tester screen has not changed after rechecking, go to other problem procedure (for malfunctions in the transmission or reception function, refer to the following procedure (see DTC C2141/41 TRANSMITTER ID1 ERROR; DTC C2142/42 TRANSMITTER ID2 ERROR; DTC C2143/43 TRANSMITTER ID3 ERROR; DTC C2144/44 TRANSMITTER ID4 ERROR  )).

    OK: END 

    NG: GO TO Next Step 

  4. CHECK DTC 
    1. Check for a DTC (see DTC CHECK / CLEAR  ).

      Result 

      RESULT

      Condition Proceed to
      DTC C2176/76 is output. A
      DTC C2176/76 is not output. B

    A: REPAIR CIRCUITS INDICATED BY OUTPUT DTCS (See  DIAGNOSTIC TROUBLE CODE CHART   ) 

    B: GO TO Next Step 

  5. CHECK DTC 
    1. Check for DTC (see DTC CHECK / CLEAR  ).

      Result 

      RESULT

      Condition Proceed to
      Any of the DTCs from C2111/11 to C2114/14 or C2121/21 to C2124/24 are output. A
      All of the DTCs from C2111/11 to C2114/14 or C2121/21 to C2124/24 are output. B

    A:  GO TO step  8

    B: GO TO Next Step 

  6. CHECK TIRE PRESSURE WARNING SELECT SWITCH 
    1. Switch the tire pressure warning select switch to the other position (MAIN to 2nd or 2nd to MAIN).

      HINT:

      If the IDs of the installed tire and wheel set and the select switch do not match, this DTC will be output.

    2. Read the values of DATA LIST.
    3. Select "TIREPRESS" by following the prompts displayed on the intelligent tester.

      HINT:

      It may take 1 minute to display the tire pressure data.

      Result 

      RESULT

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

    A: END 

    B: GO TO Next Step 

  7. RETURN TIRE PRESSURE WARNING SELECT SWITCH TO ORIGINAL POSITION 

    HINT:

    Return the tire pressure warning select switch to the position before switching in the previous step.

  8. IDENTIFY TRANSMITTER CORRESPONDING TO DTC 
    1. Set the tire pressure to the appropriate specified values.
    2. Select the "TIREPRESS" by following the prompts displayed on the intelligent tester.

      Tire pressure warning ECU 

      DATA LIST

      Item Measurement Item/Range (display) Normal Condition
      TIREPRESS1 ID1 tire inflation pressure/ min.: 0 kPa (0 kgf/cm2 , 0 psi), max.: 637.5 kPa (6.48 kgf/cm2 , 92.2 psi) Actual tire inflation pressure
      TIREPRESS2 ID2 tire inflation pressure/ min.: 0 kPa (0 kgf/cm2 , 0 psi), max.: 637.5 kPa (6.48 kgf/cm2 , 92.2 psi) Actual tire inflation pressure
      TIREPRESS3 ID3 tire inflation pressure/ min.: 0 kPa (0 kgf/cm2 , 0 psi), max.: 637.5 kPa (6.48 kgf/cm2 , 92.2 psi) Actual tire inflation pressure
      TIREPRESS4 ID4 tire inflation pressure/ min.: 0 kPa (0 kgf/cm2 , 0 psi), max.: 637.5 kPa (6.48 kgf/cm2 , 92.2 psi) Actual tire inflation pressure
    3. Rapidly reduce the tire pressure for a wheel by approximately 40 kPa (0.4 kgf/cm2 , 58 psi)/30 seconds or more.
    4. Check the DATA LIST.

      Result 

      DATA LIST

      Condition Detection Condition
      One of "Tire Inflation Pressure" data (ID1 to ID4) changed Normal
      No "Tire Inflation Pressure" data changed Transmitter corresponding to DTC
      NOTE:
      • It takes about 1 minute or more to display the updated tire pressure data.
      • When no "TIREPRESS" 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 it.
      • Record the transmitter ID of which "TIREPRESS" data corresponds to each tire.
    5. After confirming that a "TIREPRESS" data value (one of ID1 to ID4) has changed, repeat this procedure for each tire, and identify the transmitter that corresponds to the output DTC.
  9. INSPECT TIRE PRESSURE WARNING VALVE AND TRANSMITTER 
    1. Select "REGIT ID CODE" by following the prompts displayed on the intelligent tester.

      Tire pressure warning ECU 

      DATA LIST

      Item Measurement Item/Range (Display) Normal Condition Diagnostic Note
      REGIT ID1 CODE Registered ID1 code/ min.: 0, max.: FFFFFF* The ID code registered in the transmitter ID1 is displayed *: Displayed only when the ID code is not registered.
      REGIT ID2 CODE Registered ID2 code/ min.: 0, max.: FFFFFF* The ID code registered in the transmitter ID2 is displayed *: Displayed only when the ID code is not registered.
      REGIT ID3 CODE Registered ID3 code/ min.: 0, max.: FFFFFF* The ID code registered in the transmitter ID3 is displayed *: Displayed only when the ID code is not registered.
      REGIT ID4 CODE Registered ID4 code/ min.: 0, max.: FFFFFF* The ID code registered in the transmitter ID4 is displayed *: Displayed only when the ID code is not registered.
    2. Check for the ID code on the identified transmitter by removing it from the tire and wheel.
    3. Confirm that the ID code on the transmitter and recorded transmitter ID are matched.

      Result 

      RESULT

      Result Proceed to
      Matched A
      Unmatched B
      Fig 1: Identifying Transmitter ID Location
      G05189119Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    B: PERFORM REGISTRATION (TRANSMITTER ID) 

    A: GO TO Next Step 

  10. REPLACE TIRE PRESSURE WARNING VALVE AND TRANSMITTER 
    1. Replace the tire pressure warning valve and transmitter (see REMOVAL  ).
  11. REGISTRATION OF TRANSMITTER ID 
    1. Perform registration (see REGISTRATION  ).
  12. PERFORM INITIALIZATION 
    1. Perform initialization (see INITIALIZATION  ).
      NOTE: Before performing the initialization, adjust the tire pressure of the tires to the standard value.
  13. READ VALUE OF DATA LIST 
    1. Read the values of DATA LIST.
    2. Select "TIREPRESS" by following the prompts displayed on the intelligent tester.

      HINT:

      It may take 1 minute to display the tire pressure data.

      Result 

      RESULT

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

    B: REPLACE TIRE PRESSURE WARNING ECU 

    A: END 

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