TIRE PRESSURE WARNING SYSTEM ECU Power Source Circuit

DESCRIPTION

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

WIRING DIAGRAM

A01FQOXE01

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.

Tech Tips

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

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (ECU - BATTERY AND BODY GROUND)


    1. A01FV24E04
      Text in Illustration
      *A for FMVSS138 Type
      *B for ECE-R64 Type
      *a

      Front view of wire harness connector

      (to Tire Pressure Warning ECU and Receiver)

      Disconnect the tire pressure warning ECU and receiver connector.

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

      Standard Voltage
      for FMVSS138 Type
      Tester Connection Switch Condition Specified Condition
      T32-1 (IG) - Body ground Power switch on (IG) 10 to 16 V
      Power switch off Below 1 V
      for ECE-R64 Type
      Tester Connection Switch Condition Specified Condition
      U22-1 (IG) - Body ground Power switch on (IG) 10 to 16 V
      Power switch off Below 1 V

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

      Standard Resistance
      for FMVSS138 Type
      Tester Connection Condition Specified Condition
      T32-12 (GND) - Body ground Always Below 1 Ω
      for ECE-R64 Type
      Tester Connection Condition Specified Condition
      U22-12 (GND) - Body ground Always Below 1 Ω
      Result
      Result Proceed to
      NG A
      OK (for FMVSS138 Type) B
      OK (for ECE-R64 Type) C

    B

    REPLACE TIRE PRESSURE WARNING ECU AND RECEIVER Click here

    C

    REPLACE TIRE PRESSURE WARNING ECU AND RECEIVER Click here

    A

    REPAIR OR REPLACE HARNESS OR CONNECTOR