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 for 1 minute then illuminates, and tire pressure monitoring is disabled 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

B003XT3E07

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 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 FOR DTC (CAN COMMUNICATION SYSTEM)


    1. Check if CAN communication system DTCs are output.

      Click here

      Result
      Result Proceed to
      DTCs are not output. A
      DTCs are output. B

    B

    GO TO CAN COMMUNICATION SYSTEM Click here

    A

  2. CHECK DTC OUTPUT (B1247)


    1. Clear the DTCs.

      Click here


      Chassis > Tire Pressure Monitor > Clear DTCs

    2. Turn the power switch off.

    3. Turn the power switch on (IG).

    4. Check for DTCs.

      Click here


      Chassis > Tire Pressure Monitor > 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 power switch off.

    2. Connect the GTS to the DLC3.

    3. Turn the power switch on (IG).

    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 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