TIRE PRESSURE WARNING SYSTEM ECU Power Source Circuit

DESCRIPTION

This is the power source for the tire pressure warning ECU and receiver.

WIRING DIAGRAM

A01IOMSE01

INSPECTION PROCEDURE

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

  • Inspect the fuses for circuits related to this system before performing the following inspection procedure.

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (ECU - BATTERY)


    1. A01IN9UE38
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Tire Pressure Warning ECU and Receiver)

      Disconnect the tire pressure warning ECU and receiver N32 connector.

    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      N32-1 (IG) - Body ground Ignition switch ON 10 to 16 V
      Ignition switch off Below 1 V
      Result
      Result Proceed to
      OK A
      NG (w/o Stop and Start System) B
      NG (w/ Stop and Start System) C

    B

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    C

    CHECK HARNESS AND CONNECTOR (ECU - BODY GROUND) Click here

    A

  2. CHECK HARNESS AND CONNECTOR (ECU - BODY GROUND)


    1. A01IN9UE36
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Tire Pressure Warning ECU and Receiver)

      Disconnect the tire pressure warning ECU and receiver N32 connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      N32-12 (GND) - Body ground Always Below 1 Ω
      Result
      Result Proceed to
      OK (w/o Stop and Start System) A
      OK (w/ Stop and Start System) B
      NG C

    B

    GO TO STOP AND START SYSTEM (BACKUP BOOST CONVERTER CIRCUIT) Click here

    C

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    A

    REPLACE TIRE PRESSURE WARNING ECU AND RECEIVER Click here