TIRE PRESSURE WARNING SYSTEM Tire Pressure Warning Light Circuit

DESCRIPTION

If the tire pressure warning ECU and receiver detects any problems, the tire pressure warning light blinks (stays on after blinking for 1 minute) and tire pressure monitoring is canceled at the same time. At this time, the ECU stores a DTC in memory.

Connecting terminals TC and CG of the DLC3 makes the tire pressure warning light blink to output DTCs.

The tire pressure warning ECU and receiver sends the tire pressure warning light illumination request signal to the main body ECU (multiplex network body ECU) via a direct line. The main body ECU (multiplex network body ECU) then sends the signal to the combination meter assembly via CAN communication.

WIRING DIAGRAM

B002AELE46

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 has been replaced.

PROCEDURE


  1. CHECK CAN COMMUNICATION SYSTEM


    1. Check the CAN communication system.

      for LHD with Central Gateway ECU: Click here

      for RHD with Central Gateway ECU: Click here

      for LHD without Central Gateway ECU: Click here

      for RHD without Central Gateway ECU: Click here


      CAN Bus Check
      OK
      The CAN communication system is normal.
      Result
      Proceed to
      OK
      NG

    NG

    GO TO CAN COMMUNICATION SYSTEM for LHD with Central Gateway ECU: Click here
    GO TO CAN COMMUNICATION SYSTEM for RHD with Central Gateway ECU: Click here
    GO TO CAN COMMUNICATION SYSTEM for LHD without Central Gateway ECU: Click here
    GO TO CAN COMMUNICATION SYSTEM for RHD without Central Gateway ECU: Click here

    OK

  2. CHECK DTC OUTPUT (B1247)


    1. Clear the DTCs.

      Click here


      Body Electrical > Main Body > Clear DTCs

    2. Turn the ignition switch off.

    3. Turn the ignition switch to ON.

    4. Check for DTCs.

      Click here


      Body Electrical > Main Body > Trouble Codes
      OK
      DTC B1247 is not output.
      Result
      Proceed to
      OK
      NG

    NG

    GO TO DTC B1247 Click here

    OK

  3. CHECK OPERATION OF TIRE PRESSURE WARNING LIGHT (ACTIVE TEST)


    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: Body Electrical / Combination Meter / Active Test.

    6. Check the condition of the tire pressure warning light by using the GTS.


      Body Electrical > Combination Meter > Active Test
      Tester Display Measurement Item Control Range Diagnostic Note
      Indicat. Tire Pressure Warning System Tire pressure warning light OFF or ON -

      Body Electrical > Combination Meter > Active Test
      Tester Display
      Indicat. Tire Pressure Warning System
      OK
      The tire pressure warning light turns on or off in accordance with the GTS operation.
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE TIRE PRESSURE WARNING ECU AND RECEIVER Click here

    NG

    GO TO METER / GAUGE SYSTEM Click here