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Terminals Of Ecu

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  1. AIR CONDITIONING AMPLIFIER ASSEMBLY 
    Fig 1: Air Conditioning Amplifier Assembly Connector Terminal Identification
    GTY336849Courtesy 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
    L113-1 (IG+) - L113-14 (GND) B - W-B Power source (IG) Power switch on (IG) 11 to 14 V
    L113-1 (IG+) - L113-14 (GND) B - W-B Power source (IG) Power switch off Below 1 V
    L113-5 (TAM) - L113-13 (SG-2) BE - G Ambient temperature sensor signal Power switch on (IG)
    Ambient temperature: 25°C (77°F)    		 1.35 to 1.75 V
    L113-5 (TAM) - L113-13 (SG-2) BE - G Ambient temperature sensor signal Power switch on (IG)
    Ambient temperature: 40°C (104°F)    		 0.9 to 1.2 V
    L113-9 (ECOS) - L113-14 (GND) G - W-B Eco mode switch signal Power switch on (IG)
    Eco mode switch off    		 11 to 14 V
    L113-9 (ECOS) - L113-14 (GND) G - W-B Eco mode switch signal Power switch on (IG)
    Eco mode switch on    		 Below 1 V
    L113-10 (S5-3) - L113-13 (SG-2) B - G Power supply for air conditioning pressure sensor Power switch on (IG) 4.75 to 5.25 V
    L113-10 (S5-3) - L113-13 (SG-2) B - G Power supply for air conditioning pressure sensor Power switch on (IG) Below 1 V
    L113-11 (CANH) Y CAN communication system - -
    L113-12 (CANL) BR CAN communication system - -
    L113-13 (SG-2) - Body ground G - Body ground Ground for air conditioning pressure sensor, ambient temperature sensor Always Below 1 V
    L113-14 (GND) - Body ground W-B - Body ground Ground for main power supply Always Below 1 V
    L113-16 (PTC3) - L113-14 (GND) BR - W-B PTC heater operation signal
    • Power switch on (READY)
    • Temperature setting: MAX. HOT
    • Ambient temperature: 10°C (50°F) or lower
    • Engine coolant temperature: 55°C (131°F) or lower
    • Eco mode switch off
    • Blower switch on
    		 Below 1 V
    L113-18 (PTC1) - L113-14 (GND) W - W-B PTC heater operation signal
    • Power switch on (READY)
    • Temperature setting: MAX. HOT
    • Ambient temperature: 10°C (50°F) or lower
    • Engine coolant temperature: 55°C (131°F) or lower
    • Eco mode switch off
    • Blower switch on
    		 Below 1 V
    L113-21 (B) - L113-14 (GND) Y - W-B Power source (Back-up) Power switch off 11 to 14 V
    L113-23 (BLW) - L113-14 (GND) W - W-B Blower motor speed control signal Power switch on (IG)
    Blower switch LO    		 Pulse generation
    (See waveform 1)
    L113-27 (IDH) - L113-14 (GND) L - W-B Inverter with converter assembly current over signal Power switch on (IG) 4.5 to 5.5 V
    L113-29 (TR) - L113-34 (SG-1) B - W Room temperature sensor signal Power switch on (IG)
    Cabin temperature: 25°C (77°F)    		 1.8 to 2.2 V
    L113-29 (TR) - L113-34 (SG-1) B - W Room temperature sensor signal Power switch on (IG)
    Cabin temperature: 40°C (104°F)    		 1.2 to 1.6 V
    L113-32 (PRE) - L113-13 (SG-2) L - G Air conditioning pressure sensor signal
    • Power switch on (READY)
    • A/C system operating
    • Refrigerant pressure: Abnormal pressure (more than 3140 kPa (32.0 kgf/cm2 , 455 psi))
    		 4.88 V or higher
    L113-32 (PRE) - L113-13 (SG-2) L - G Air conditioning pressure sensor signal
    • Power switch on (READY)
    • A/C system operating
    • Refrigerant pressure: Abnormal pressure (less than 196 kPa (2.0 kgf/cm2 , 28 psi))
    		 Below 0.66 V
    L113-32 (PRE) - L113-13 (SG-2) L - G Air conditioning pressure sensor signal
    • Power switch on (READY)
    • A/C system operating
    • Refrigerant pressure: Normal pressure (less than 3140 kPa (32.0 kgf/cm2 , 455 psi) and more than 196 kPa (2.0 kgf/cm2 , 28 psi))
    		 0.66 to 4.88 V
    L113-33 (TS) - L113-14 (GND) BR - W-B Solar sensor signal Power switch on (IG)
    Solar sensor subjected to electric light    		 0.8 to 4.3 V
    L113-33 (TS) - L113-14 (GND) BR - W-B Solar sensor signal Power switch on (IG)
    Solar sensor covered with a cloth    		 Below 0.8 V
    L113-34 (SG-1) - Body ground W - Body ground Ground for room temperature sensor Always Below 1 V
    L113-37 (LIN1) - L113-14 (GND) V - W-B LIN communication signal Power switch on (IG) Pulse generation
    L113-38 (PTC2) - L113-14 (GND) B - W-B PTC heater operation signal
    • Power switch on (READY)
    • Temperature setting: MAX. HOT
    • Ambient temperature: 10°C (50°F) or lower
    • Engine coolant temperature: 55°C (131°F) or lower
    • Eco mode switch off
    • Blower switch on
    		 Below 1 V
    z11-2 (BUS G) - Body ground - Ground for BUS IC Always Below 1 V
    z11-4 (B BUS) - z11-2 (BUS G) - Power supply for BUS IC Power switch off 11 to 14 V
    z11-5 (SGA) - Body ground - Ground for evaporator temperature sensor Always Below 1 V
    z11-6 (TEA) - z11-5 (SGA) - Evaporator temperature sensor signal Power switch on (IG)
    Evaporator temperature: 0°C (32°F)    		 1.7 to 2.1 V
    z11-6 (TEA) - z11-5 (SGA) - Evaporator temperature sensor signal Power switch on (IG)
    Evaporator temperature: 15°C (59°F)    		 0.9 to 1.3 V
    1. Waveform 1:
      Fig 2: Identifying Waveform
      GTY100006Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Item Content
      Terminal No. L113-23 (BLW) - L113-14 (GND)
      Tool Setting 1 V/DIV., 500 μs/DIV.
      Vehicle Condition Power switch on (IG)
      Blower switch LO

      HINT: 

      The waveform varies with the blower speed.

  2. AIR CONDITIONING CONTROL ASSEMBLY 
    Fig 3: Air Conditioning Control Assembly Connector Terminal Identification
    GTY327130Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    HINT: 

    Check from the rear of the connector while it is connected to the A/C control assembly.

    Terminal No.
    (Symbol)    		 Wiring Color Terminal Description Condition Specified Condition
    L195-2 (TX+) - L195-8 (GND) V - W-B LIN communication signal Power switch on (IG) Pulse generation
    L195-3 (SWO) - L195-8 (GND) L - W-B Steering pad switch assembly signal No switch pushed
    → R/F switch pushed
    → TEMP+ switch pushed
    → TEMP- switch pushed    		 4.44 to 5.43 V
    → 1.19 to 1.49 V
    → 2.09 to 2.54 V
    → 3.2 to 3.88 V
    L195-5 (IG+) - L195-8 (GND) B - W-B Power source (IG) Power switch off Below 1 V
    L195-5 (IG+) - L195-8 (GND) B - W-B Power source (IG) Power switch on (IG) 11 to 14 V
    L195-6 (ILL+) - Body ground G - Body ground Illumination signal Light control switch off Below 1 V
    L195-6 (ILL+) - Body ground G - Body ground Illumination signal Light control switch tail or head 11 to 14 V
    L195-7 (ILL-) - Body ground W-B - Body ground Illumination signal Light control switch off Below 1 V
    L195-7 (ILL-) - Body ground W-B - Body ground Illumination signal Light control switch tail or head Pulse generation
    L195-8 (GND) - Body ground W-B - Body ground Ground for air conditioning control assembly Always Below 1 V
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