TIRE PRESSURE WARNING SYSTEM ECU Power Source Circuit

DTC Code DTC Name
ECU Power Source Circuit

DESCRIPTION

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

WIRING DIAGRAM

C279317E03

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

Tip:

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. E198671C01

      *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 M11*1 or M30*2 connector.

      • *1: for FMVSS138 Type

      • *2: for ECE-R64 Type

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

      Standard Voltage

      for FMVSS138 Type

      Tester Connection

      Switch Condition

      Specified Condition

      M11-1 (IG) - Body ground

      Ignition switch ON

      10 to 16 V

      Ignition switch off

      Below 1 V

      for ECE-R64 Type

      Tester Connection

      Switch Condition

      Specified Condition

      M30-1 (IG) - Body ground

      Ignition switch ON

      10 to 16 V

      Ignition 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

      M11-12 (E) - Body ground

      Always

      Below 1 Ω

      for ECE-R64 Type

      Tester Connection

      Condition

      Specified Condition

      M30-12 (GND) - Body ground

      Always

      Below 1 Ω

      Result

      Proceed to

      OK

      NG
    OK

    REPLACE TIRE PRESSURE WARNING ECU AND RECEIVER

    Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR