TIRE PRESSURE WARNING SYSTEM Tire Pressure Warning Light Circuit

DESCRIPTION

If the tire pressure warning ECU and receiver detects a disconnected connector or an open circuit between the tire pressure warning ECU and receiver and combination meter assembly, the tire pressure warning light blinks for 1 minute, and then remains on after the ignition switch is turned to on.

WIRING DIAGRAM

B003MXTE21
*a TIRE
*b Tire Pressure Warning ECU and Receiver
*c Combination Meter Assembly

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 HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - TIRE PRESSURE WARNING ECU AND RECEIVER)


    1. Turn the ignition switch off.

    2. Disconnect the N54 tire pressure warning ECU and receiver connector.

    3. Disconnect the G8 combination meter assembly connector.

    4. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      N54-5 (IND) - G8-29 (TIRE) Always Below 1 Ω
      N54-5 (IND) or G8-29 (TIRE) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  2. 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 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 Click here

    NG

    GO TO METER / GAUGE SYSTEM Click here