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Terminals Of Ecu [12/2019 - 10/2022]

  1. CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY 
    GTY848254Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the instrument panel junction block assembly and main body ECU (multiplex network body ECU) connectors.
    2. Measure the voltage and resistance according to the value(s) in the table below.
      Terminal No. (Symbol) Terminal Description Condition Specified Condition
      4B-3 - Body ground Ground Always Below 1 Ω
      4C-1 - Body ground Auxiliary battery power supply Ignition switch off*1
      Always*2      		 11 to 14 V
      4F-1 - Body ground Auxiliary battery power supply Ignition switch off*1
      Always*2      		 11 to 14 V
      1. *1: for HV Model
      2. *2: for Gasoline Model
    3. Connect the instrument panel junction block assembly and main body ECU (multiplex network body ECU) connectors.
    4. Measure the voltage and check for pulses according to the value(s) in the table below.
      Terminal No. (Symbol) Terminal Description Condition Specified Condition
      H44-5 (CXP1) - Body ground CXPI communication line Ignition switch ON Pulse generation
      Less than approximately 100 seconds after ignition switch turned off
      Approximately 100 seconds or more after ignition switch turned off 11 to 14 V
      H43-21 (WPS) - Body ground IG1 WIP Relay operation signal Ignition switch ON 11 to 14 V
      Less than approximately 60 seconds after ignition switch turned off
      Approximately 60 seconds or more after ignition switch turned off Below 1 V
      H42-1 (RWRY) - Body ground Rear wiper motor assembly operation signal Rear wiper motor assembly stopped 11 to 14 V
      Rear wiper motor assembly operating Below 1 V
      H42-3 (LIN3) - Body ground* LIN communication line Ignition switch ON Pulse generation
      1. *: w/ Auto Wiper System
  2. CHECK WINDSHIELD WIPER RELAY ASSEMBLY 
    GTY916421Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the A6 and A7 windshield wiper relay assembly connectors.
    2. Measure the voltage and resistance according to the value(s) in the table below.
      Terminal No. (Symbol) Terminal Description Condition Specified Condition
      A6-3 (E) - Body ground Ground Always Below 1 Ω
      A6-5 (EWS) - Body ground Ground Always Below 1 Ω
      A6-6 (IGWS) - Body ground Washer circuit IG power source Ignition switch off Below 1 V
      Ignition switch ON 11 to 14 V
      A6-8 (+B) - Body ground Ignition switch ON signal (Power source circuit) Ignition switch ON 11 to 14 V
      Less than approximately 60 seconds after ignition switch turned off
      Approximately 60 seconds or more after ignition switch turned off Below 1 V
      A7-5 (ES) - Body ground Ground Always Below 1 Ω
    3. Connect the A6 and A7 windshield wiper relay assembly connectors.
    4. Measure the voltage and check for pulses according to the value(s) in the table below.
      Terminal No. (Symbol) Terminal Description Condition Specified Condition
      A6-1 (+WR) - Body ground Front washer operation signal Ignition switch ON, front washer operating 11 to 14 V
      A6-2 (+1) - Body ground LO operation signal to windshield wiper motor assembly Ignition switch ON, windshield wiper motor assembly operating in LO 11 to 14 V
      A6-4 (+2) - Body ground HI operation signal to windshield wiper motor assembly Ignition switch ON, windshield wiper motor assembly operating in HI 11 to 14 V
      A6-7 (-WR) - Body ground Rear washer operation signal Ignition switch ON, rear washer operating 11 to 14 V
      A7-3 (2S) - Body ground Windshield wiper motor assembly HI operation signal Windshield wiper motor assembly stopped 11 to 14 V
      Windshield wiper motor assembly operating in HI Below 1 V
      A7-4 (MPX1) - Body ground CXPI communication line Ignition switch ON Pulse generation
      Less than approximately 100 seconds after ignition switch turned off
      Approximately 100 seconds or more after ignition switch turned off 11 to 14 V
      A7-6 (+SM) - Body ground Windshield wiper motor assembly position detection signal Windshield wiper motor assembly in LO or HI operation Below 1 V ←→ 11 to 14 V
      Windshield wiper motor assembly stopped Below 1 V
  3. CHECK RAIN SENSOR (w/ Auto Wiper System) 
    GTY859365Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the R4 rain sensor connector.
    2. Measure the voltage and resistance and check for pulses according to the value(s) in the table below.
      Terminal No. (Symbol) Terminal Description Condition Specified Condition
      R4-2 (ES) - Body ground Ground Always Below 1 Ω
      R4-3 (MPX) - Body ground LIN communication signal Ignition switch ON Pulse generation
      R4-4 (SIG) - Body ground IG power source circuit Ignition switch off Below 1 V
      Ignition switch ON 11 to 14 V
  4. CHECK COMBINATION METER ASSEMBLY 

    Refer to TERMINALS OF ECU [12/2019 - 11/2023]

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