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 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 engine switch is turned on (IG).

WIRING DIAGRAM

C171956E08

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 hereClick here) after registration (Click hereClick here) of the transmitter IDs into the tire pressure warning ECU and receiver if the ECU has been replaced.

    *: w/ Tire Pressure Warning Reset Switch

PROCEDURE

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

    1. Disconnect the tire pressure warning ECU and receiver R42 connector.

    2. Disconnect the combination meter assembly G3 connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      R42-5 (IND) - G3-8 (TIRE)

      Always

      Below 1 Ω

      R42-5 (IND) or G3-8 (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 engine switch off.

    2. Connect the GTS to the DLC3.

    3. Turn the engine 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 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