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

  1. CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY 
    GTY939650Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    *a This connector is not used by the window defogger system. Refer to Air Conditioning System. - -
    1. Disconnect the H62 air conditioning amplifier assembly connector.
    2. Measure the voltage and resistance according to the value(s) in the table below.

      HINT: 

      Measure the values on the wire harness side with the connector disconnected.

      Terminal No. (Symbol) Terminal Description Condition Specified Condition
      H62-6 (IG+) - H62-17 (GND) Power source (IG) Ignition switch ON 11 to 14 V
      H62-6 (IG+) - H62-17 (GND) Power source (IG) Ignition switch off Below 1 V
      H62-5 (B) - H62-17 (GND) Auxiliary battery power supply Ignition switch off*1
      Always*2      		 11 to 14 V
      H62-17 (GND) - Body ground Ground Always Below 1 Ω
      1. *1: for HV Model
      2. *2: for Gasoline Model
    3. Reconnect the H62 air conditioning amplifier assembly connector.
    4. Measure the voltage and check for pulses according to the value(s) in the table below.
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      H63-18 (RDFG) - H62-17 (GND) R - W-B Rear window defogger signal Ignition switch ON, rear window defogger switch off 11 to 14 V
      H63-18 (RDFG) - H62-17 (GND) R - W-B Rear window defogger signal Ignition switch ON, rear window defogger switch on Below 1 V
      H62-7 (LIN1) - H62-17 (GND) BE - W-B LIN communication line Ignition switch ON Pulse generation
  2. CHECK REAR WINDOW DEFOGGER SWITCH (AIR CONDITIONING CONTROL ASSEMBLY) 
    GTY915155Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the H27 air conditioning control assembly connector.
    2. Measure the voltage and resistance according to the value(s) in the table below.

      HINT: 

      Measure the values on the wire harness side with the connector disconnected.

      Terminal No. (Symbol) Terminal Description Condition Specified Condition
      H27-4 (IG+) - H27-8 (E)*1 Power source (IG) Ignition switch ON 11 to 14 V
      H27-6 (IG+) - H27-10 (GND)*2
      H27-4 (IG+) - H27-8 (E)*1 Power source (IG) Ignition switch off Below 1 V
      H27-6 (IG+) - H27-10 (GND)*2
      H27-8 (E) - Body ground*1 Ground Always Below 1 Ω
      H27-10 (GND) - Body ground*2
      1. *1: for 12.3 Inch Display
      2. *2: for 8 Inch Display
    3. Reconnect the H27 air conditioning control assembly connector.
    4. Check for pulses according to the value(s) in the table below.
      Terminal No. (Symbol) Terminal Description Condition Specified Condition
      H27-3 (LIN1) - H27-8 (E)*1 LIN communication line Ignition switch ON Pulse generation
      H27-8 (LIN1) - H27-10 (GND)*2
      1. *1: for 12.3 Inch Display
      2. *2: for 8 Inch Display
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