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Home >> Toyota >> 2022 >> Avalon XLE >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 45 (Air Conditioning System - Diagnostics - Introduction (Hybrid)) >> AIR CONDITIONING SYSTEM (for HV Model) >> Terminals Of Ecu [04/2018 - 08/2019] >> Terminals Of Ecu [04/2018 - 08/2019]

Terminals Of Ecu [04/2018 - 08/2019]

WARNING: This page is about a different variant/trim than selected.
  1. CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY 
    GTY875089Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    HINT: 

    Check from the rear of the connector while it is connected to the air conditioning amplifier assembly.

    Terminal No.
    (Symbol)    		 Wiring Color Terminal Description Condition Specified Condition
    G35-1 (B) - G35-4 (GND) LA-B - W-B Power source (Back-up) Power switch off 11 to 14 V
    G35-2 (IG+) - G35-4 (GND) LA-GR - W-B Power source (IG) Power switch on (IG) 11 to 14 V
    Power switch off Below 1 V
    G35-4 (GND) - Body ground W-B - Body ground Ground for main power supply Always Below 1 V
    G35-6 (BLW) - G35-4 (GND) LG - W-B Blower motor speed control signal
    • Power switch on (IG)
    • Blower switch: LO
    		 Pulse generation
    (See waveform 1)
    G35-11 (CANH) - G35-12 (CANL) SB - W CAN communication system CAN communication is performed Pulse generation
    G35-14 (LIN1) - G35-4 (GND) LG - W-B LIN communication signal Power switch on (IG) Pulse generation
    (See waveform 2)
    G35-18 (PTC1) - G35-4 (GND) R - W-B Quick heater assembly operation signal
    • Power switch on (READY)
    • ECO switch assembly (electric parking brake switch assembly): Off
    • Temperature setting: MAX HOT
    • Ambient temperature: 10°C (50°F) or lower
    • Engine coolant temperature: 65°C (149°F) or lower
    • Light control switch off
    • Blower switch: On
    		 Below 1 V
    • Power switch on (READY)
    • ECO switch assembly (electric parking brake switch assembly): Off
    • Temperature setting: MAX HOT
    • Ambient temperature: 10°C (50°F) or lower
    • Engine coolant temperature: 65°C (149°F) or lower
    • Light control switch off
    • Blower switch: Off
    		 11 to 15.5 V
    G36-1 (SG-1) - Body ground LG - Body ground Ground for cooler (room temp. sensor) thermistor Always Below 1 V
    G36-2 (SG-2) - Body ground W - Body ground Ground for thermistor assembly Always Below 1 V
    G36-3 (SG-4) - Body ground L - Body ground Ground for air conditioner pressure sensor Always Below 1 V
    G36-6 (S5-3) - G36-3 (SG-4) GR - L Power supply for air conditioner pressure sensor Power switch on (IG) 4.75 to 5.25 V
    Power switch off Below 1 V
    G36-10 (PTC2) - G35-4 (GND) L - W-B Quick heater assembly operation signal
    • Power switch on (READY)
    • ECO switch assembly (electric parking brake switch assembly): Off
    • Temperature setting: MAX HOT
    • Ambient temperature: 0°C (32°F) or lower
    • Engine coolant temperature: 62.5°C (144.5°F) or lower
    • Light control switch off
    • Blower switch: On
    		 Below 1 V
    • Power switch on (READY)
    • ECO switch assembly (electric parking brake switch assembly): Off
    • Temperature setting: MAX HOT
    • Ambient temperature: 0°C (32°F) or lower
    • Engine coolant temperature: 62.5°C (144.5°F) or lower
    • Light control switch off
    • Blower switch: Off
    		 11 to 15.5 V
    G36-13 (TAM) - G36-2 (SG-2) R - W Thermistor assembly signal
    • Power switch on (IG)
    • Ambient temperature: 25°C (77°F)
    		 1.05 to 1.45 V
    • Power switch on (IG)
    • Ambient temperature: 40°C (104°F)
    		 0.64 to 0.87 V
    G36-14 (TR) - G36-1 (SG-1) GR - LG Cooler (room temp. sensor) thermistor signal
    • Power switch on (IG)
    • Cabin temperature: 25°C (77°F)
    		 1.05 to 1.45 V
    • Power switch on (IG)
    • Cabin temperature: 40°C (104°F)
    		 0.64 to 0.87 V
    G36-20 (ECOS) - G35-4 (GND) W - W-B ECO switch assembly (electric parking brake switch assembly) signal
    • Power switch on (IG)
    • ECO switch assembly (electric parking brake switch assembly): Off
    		 11 to 14 V
    • Power switch on (IG)
    • ECO switch assembly (electric parking brake switch assembly): On
    		 Below 1 V
    G36-24 (PRE) - G36-3 (SG-4) W - L Air conditioner pressure sensor signal
    • Power switch on (READY)
    • Air conditioning system operating
    • Refrigerant pressure: Abnormal pressure (more than 3025 kPaG (30.8 kgf/cm2 , 439 psi))
    		 4.61 V or higher
    • Power switch on (READY)
    • Air conditioning system operating
    • Refrigerant pressure: Abnormal pressure (less than 176 kPaG (1.8 kgf/cm2 , 26 psi))
    		 Below 0.74 V
    • Power switch on (READY)
    • Air conditioning system operating
    • Refrigerant pressure: Normal pressure (less than 3025 kPaG (30.8 kgf/cm2 , 439 psi) and more than 176 kPaG (1.8 kgf/cm2 , 26 psi))
    		 0.74 to 4.61 V
    z9-2 (BUS G) - Body ground B - Body ground Ground for BUS IC Always Below 1 V
    z9-3 (BUS) - z9-2 (BUS G) L - B BUS IC control signal Power switch on (IG) Pulse generation
    (See waveform 3)
    z9-4 (B BUS) - z9-2 (BUS G) R - B Power supply for BUS IC Power switch off 11 to 14 V
    z9-5 (SGA) - Body ground GR - Body ground Ground for No. 1 cooler thermistor Always Below 1 V
    z9-6 (TEA) - z9-5 (SGA) GR - GR No. 1 cooler thermistor signal
    • Power switch on (IG)
    • Evaporator temperature: 0°C (32°F)
    		 1.7 to 2.1 V
    • Power switch on (IG)
    • Evaporator temperature: 15°C (59°F)
    		 0.9 to 1.3 V
    1. Waveform 1:
      Fig 1: Waveform 1
      GTY578346Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Item Content
      Terminal No. G35-6 (BLW) - G35-4 (GND)
      Tool Setting 2 V/DIV., 1 ms./DIV.
      Condition
      • Power switch on (IG)
      • Blower switch: LO
    2. Waveform 2:
      Fig 2: Waveform 2
      GTY600247Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Item Content
      Terminal No. G35-14 (LIN1) - G35-4 (GND)
      Tool Setting 2 V/DIV., 20 ms./DIV.
      Condition Power switch on (IG)
    3. Waveform 3:
      Fig 3: Waveform 3
      GTY563288Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Item Content
      Terminal No. z9-3 (BUS) - z9-2 (BUS G)
      Tool Setting 2 V/DIV., 2 ms./DIV.
      Condition Power switch on (IG)
  2. CHECK AIR CONDITIONING CONTROL PANEL (RADIO AND DISPLAY RECEIVER ASSEMBLY) 
    GTY867253Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    HINT: 

    Check from the rear of the connector while it is connected to the air conditioning control panel (radio and display receiver assembly).

    Terminal No.
    (Symbol)    		 Wiring Color Terminal Description Condition Specified Condition
    G20-2 (IG+) - G20-6 (GND) GR - W-B Power source (IG) Power switch off Below 1 V
    Power switch on (IG) 11 to 14 V
    G20-3 (+B) - G20-6 (GND) L - W-B Power source (Back-up) Power switch off 11 to 14 V
    G20-6 (GND) - Body ground W-B - Body ground Ground for air conditioning control panel (radio and display receiver assembly) Always Below 1 V
    G20-8 (LIN1) - Body ground LG - Body ground LIN communication signal Power switch on (IG) Pulse generation
    (See waveform)
    G20-10 (ACC) - G20-6 (GND) P - W-B Power source (ACC) Power switch off Below 1 V
    Power switch on (ACC) 11 to 14 V
    G20-11 (ILL+) - Body ground W - Body ground Illumination signal Taillight off Below 1 V
    Taillight on 11 to 14 V
    G20-15 (ILL-) - Body ground B - Body ground Illumination signal Always Below 1 V
    1. Waveform:
      Fig 4: Waveform
      GTY563288Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Item Content
      Terminal No. G20-8 (LIN1) - Body ground
      Tool Setting 2 V/DIV., 20 ms./DIV.
      Condition Power switch on (IG)
  4. HYBRID VEHICLE CONTROL ECU ASSEMBLY 

    Refer to TERMINALS OF ECU [04/2018 - 08/2019]

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