TIRE PRESSURE WARNING SYSTEM ECU Power Source Circuit

DESCRIPTION

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

WIRING DIAGRAM

A011SF3E01

INSPECTION PROCEDURE

Note

  • When replacing the tire pressure warning ECU and receiver, read the transmitter IDs stored in the old ECU using the Techstream and write them down before removal.

  • It is necessary to perform registration Click here of the transmitter IDs into the tire pressure warning ECU and receiver if the ECU has been replaced.

  • When replacing the tire pressure warning ECU and receiver on vehicles equipped with the wireless door lock control system (w/o smart key system), be sure to perform Registration of Recognition Code to register the transmitter IDs after ECU replacement Click here.

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. Disconnect the O25, O33 or N41 ECU connector.

      A011UWEE11

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition

      O25-1 (IG) - Body ground*1

      O33-1 (IG) - Body ground*2

      N41-1 (IG) - Body ground*3

      		 Ignition switch ON 10 to 16 V
      Ignition switch off Below 1 V

      • *1: w/o Intuitive Parking Assist System with Wireless Door Lock Control System

      • *2: w/o Intuitive Parking Assist System without Wireless Door Lock Control System

      • *3: w/ Intuitive Parking Assist System

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

      Standard Resistance
      Tester Connection Condition Specified Condition

      O25-12 (GND) - Body ground*1

      O33-12 (GND) - Body ground*2

      N41-12 (GND) - Body ground*3

      		 Always Below 1 Ω

      • *1: w/o Intuitive Parking Assist System with Wireless Door Lock Control System

      • *2: w/o Intuitive Parking Assist System without Wireless Door Lock Control System

      • *3: w/ Intuitive Parking Assist System

      Text in Illustration
      *A w/o Intuitive Parking Assist System with Wireless Door Lock Control System
      *B w/o Intuitive Parking Assist System without Wireless Door Lock Control System
      *C w/ Intuitive Parking Assist System
      *a

      Front view of wire harness connector

      (to Tire Pressure Warning ECU and Receiver)
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE TIRE PRESSURE WARNING ECU AND RECEIVER Click here