TIRE PRESSURE WARNING SYSTEM Tire Pressure Warning Light Circuit

DTC Code DTC Name
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

C257852E11

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 has been replaced.

PROCEDURE

  1. CHECK FOR DTC (CAN COMMUNICATION SYSTEM)

    1. Check if CAN communication system DTCs are output.

      w/o Central Gateway ECU:

      Click hereClick hereClick here

      w/ Central Gateway ECU:

      Click hereClick here

    Result

    Result

    Proceed to

    DTCs are not output.

    A

    DTCs are output.

    B
    B

    GO TO CAN COMMUNICATION SYSTEM

    w/o Central Gateway ECU:

    Click here

    w/ Central Gateway ECU:

    Click here

    A

  2. CHECK DTC OUTPUT (B1247)

    1. Clear the DTCs.

      Click here

      Chassis > Tire Pressure Monitor > Clear DTCs

    2. Turn the ignition switch off.

    3. Turn the ignition switch to ON.

    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 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 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

      Confirm that the vehicle is stopped with the engine idling.

      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

    for Sedan:Click here

    for Wagon:Click here

    for Hatchback:Click here

    NG

    GO TO METER / GAUGE SYSTEM

    Click here