TIRE PRESSURE WARNING SYSTEM TERMINALS OF ECU

  1. CHECK TIRE PRESSURE WARNING ECU AND RECEIVER

    Tech Tips

    Inspect the connectors from the back side while the connectors are connected.

    A011R10E65
    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 - -

    1. Measure the voltage and resistance according to the value(s) in the table below. If the result is not as specified, the ECU may be malfunctioning.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition

      O25-1 (IG) - O25-12 (GND)*1

      O33-1 (IG) - O33-12 (GND)*2

      N41-1 (IG) - N41-12 (GND)*3

      		 V - BR IG power source Ignition switch ON 10 to 16 V

      O25-4 (RDA) - O25-12 (GND)*1

      O33-4 (RDA) - O33-12 (GND)*2

      N41-4 (RDA) - N41-12 (GND)*3

      		 L - BR Output signals Ignition switch ON Pulse generation (see waveform 1)

      O25-5 (PRG) - O25-12 (GND)*1

      O33-5 (PRG) - O33-12 (GND)*2

      N41-5 (PRG) - N41-12 (GND)*3

      		 P - BR Input signals Ignition switch ON Pulse generation (see waveform 1)

      O25-12 (GND) - Body ground*1

      O33-12 (GND) - Body ground*2

      N41-12 (GND) - Body ground*3

      		 BR - Body ground Ground 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

    2. Using an oscilloscope, check waveform 1.

      A011RWNE01
      Text in Illustration
      *a Example
      *b GND
      Waveform 1:
      Item Contents
      Terminal

      O25-4 (RDA) - O25-12 (GND)*1

      O33-4 (RDA) - O33-12 (GND)*2

      N41-4 (RDA) - N41-12 (GND)*3

      O25-5 (PRG) - O25-12 (GND)*1

      O33-5 (PRG) - O33-12 (GND)*2

      N41-5 (PRG) - N41-12 (GND)*3
      Tool setting 5 V/DIV, 50 μs./DIV.
      Vehicle condition Ignition switch ON

      • *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

      Tech Tips

      The waveform shown in the illustration is an example. If the tester displays a waveform that alternates between high and low, where high is a voltage that is between the IG power source voltage and a voltage 2.2 V lower than the IG power source voltage, and where low is a voltage of between 0 and 1.2 V, the ECU can be judged normal.