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Terminals Of Ecu

WARNING: This page is about a different car, the 2011 Toyota Corolla. However, it is still accessible from the selected car via links, so may be relevant.
  1. A/C AMPLIFIER 
    Fig 1: E30 & X1 ECU Connector Terminal Identification
    GTY175549Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    HINT: 

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

    Terminal No.
    (Symbol)    		 Wiring Color Terminal Description Condition Specified Condition
    E30-1 (IG+) - E30-14 (GND) Y - W-B*1
    R - W-B*2    		 Power source (IG) Ignition switch: ON 11 to 14 V
    E30-1 (IG+) - E30-14 (GND) Y - W-B*1
    R - W-B*2    		 Power source (IG) Ignition switch: off Below 1 V
    E30-2 (SOL+) - E30-14 (GND) LG - W-B*1
    V - W-B*2    		 Compressor assembly with pulley operation signal Engine running
    A/C switch: ON
    Blower switch: LO    		 Pulse generation
    (See Fig 2
    E30-3 (PTC1) - E30-14 (GND)*3 W - W-B*1
    P - W-B*2    		 PTC heater operation signal Engine running (1250 RPM or higher)
    Temperature setting: MAX. HOT
    Ambient temperature: 10°C (50°F) or lower
    Engine coolant temperature: 75°C (167°F) or lower
    Light control switch: OFF
    Blower switch: ON    		 11 to 14 V
    E30-7 (FLOQ) - E30-35 (SG-4)*4 R - W A/C flow sensor signal Ignition switch: ON
    A/C switch: OFF    		 3.8 to 4.2 V
    E30-7 (FLOQ) - E30-35 (SG-4)*4 R - W A/C flow sensor signal Ignition switch: ON
    A/C switch: ON
    Blower switch: HI    		 0.7 to 3.8 V
    E30-9 (PRE) - E30-13 (SG-2) L - G A/C pressure sensor signal Engine running, A/C system operating, Refrigerant pressure: Abnormal pressure (more than 3140 kPa (32.0 kgf/cm2 , 455 psi)) 4.848 V or higher
    E30-9 (PRE) - E30-13 (SG-2) L - G A/C pressure sensor signal Engine running, A/C system operating, Refrigerant pressure: Abnormal pressure (less than 196 kPa (2.0 kgf/cm2 , 28 psi)) Below 0.734 V
    E30-9 (PRE) - E30-13 (SG-2) L - G A/C pressure sensor signal Engine running, 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)) 0.734 to 4.848 V
    E30-10 (S5-3) - E30-13 (SG-2) B - G Power supply for A/C pressure sensor Ignition switch: ON
    A/C switch: ON    		 4.75 to 5.25 V
    E30-10 (S5-3) - E30-13 (SG-2) B - G Power supply for A/C pressure sensor Ignition switch: ON
    A/C switch: OFF    		 Below 1 V
    E30-11 (CANH) - E30-12 (CANL) V - W CAN communication circuit Ignition switch: ON Pulse generation
    E30-13 (SG-2) - Body ground G - Body ground Ground for A/C pressure sensor Always Below 1 V
    E30-14 (GND) - Body ground W-B - Body ground Ground for main power supply Always Below 1 V
    E30-21 (B) - E30-14 (GND) W - W-B*1
    BR - W-B*2    		 Power source (Back-up) Always 11 to 14 V
    E30-22 (PTC2) - E30-14 (GND)*3 B - W-B PTC heater operation signal Engine running (1250 RPM or higher)
    Temperature setting: MAX. HOT
    Ambient temperature: 10°C (50°F) or lower
    Engine coolant temperature: 70°C (158°F) or lower
    Light control switch: OFF
    Blower switch: ON    		 11 to 14 V
    E30-23 (BLW) - E30-14 (GND) R - W-B*1
    L - W-B*2    		 Blower motor speed control signal Ignition switch: ON
    Blower switch: ON    		 Pulse generation
    (See Fig 3
    E30-25 (ALT) - E30-14 (GND)*3 L - W-B Alternator signal (PTC Heater line control) Engine started Pulse generation
    E30-27 (HLS) - E30-14 (GND)*3 B - W-B*1
    V - W-B*2    		 Headlight signal (PTC Heater line control) Engine started
    Headlight switch: OFF    		 11 to 14 V
    E30-27 (HLS) - E30-14 (GND)*3 B - W-B*1
    V - W-B*2    		 Headlight signal (PTC Heater line control) Engine started
    Headlight switch: ON    		 Below 1 V
    E30-29 (TR) - E30-34 (SG-1) GR - V*1,
    W - SB*2    		 Room temperature sensor signal Ignition switch: ON
    Cabin temperature at 25°C (77°F)    		 1.8 to 2.2 V
    E30-29 (TR) - E30-34 (SG-1) GR - V*1,
    W - SB*2    		 Room temperature sensor signal Ignition switch: ON
    Cabin temperature at 40°C (104°F)    		 1.2 to 1.6 V
    E30-30 (S5-1) - E30-35 (SG-4)*4 B - W Power supply for A/C flow sensor Ignition switch: ON 4.5 to 5.5 V
    E30-30 (S5-1) - E30-35 (SG-4)*4 B - W Power supply for A/C flow sensor Ignition switch: off Below 1 V
    E30-31 (S5-4) - E30-14 (GND) LG - W-B*1
    Y - W-B*2    		 Solar sensor power source Ignition switch: ON
    A/C switch: ON    		 4.5 to 5.5 V
    E30-33 (TS) - E30-14 (GND) P - W-B*1
    R - W-B*2    		 Solar sensor signal Ignition switch: ON
    Solar sensor subjected to light.    		 0.8 to 4.3 V
    E30-33 (TS) - E30-14 (GND) P - W-B*1
    R - W-B*2    		 Solar sensor signal Ignition switch: ON
    Solar sensor covered with cloth.    		 Below 0.8 V
    E30-34 (SG-1) - Body ground V - Body ground*1
    SB - Body ground*2    		 Ground for room temperature sensor Always Below 1 V
    E30-35 (SG-4) - Body ground*4 W - Body ground Ground for A/C flow sensor Always Below 1 V
    E30-37 (LIN1) - E30-14 (GND) SB - W-B*1
    LG - W-B*2    		 LIN communication signal Ignition switch: ON Pulse generation
    E30-38 (RDFG) - E30-14 (GND) B - W-B*1
    BE - W-B*2    		 DEF relay signal Ignition switch: ON
    REAR DEF switch: ON    		 Below 1 V
    E30-38 (RDFG) - E30-14 (GND) B - W-B*1
    BE - W-B*2    		 DEF relay signal Ignition switch: ON
    REAR DEF switch: OFF    		 11 to 14 V
    X1-2 (BUS G) - Body ground - Ground for BUS IC Always Below 1 V
    X1-3 (BUS) - X1-2 (BUS G) - BUS IC control signal Ignition switch off → ON Pulse generation
    X1-4 (B BUS) - X1-2 (BUS G) - Power supply for BUS IC Ignition switch: off Below 1 V
    X1-4 (B BUS) - X1-2 (BUS G) - Power supply for BUS IC Ignition switch: ON 11 to 14 V
    X1-5 (SGA) - Body ground - Ground for evaporator temperature sensor Always Below 1 V
    X1-6 (TEA) - X1-5 (SGA) - Evaporator temperature sensor signal Ignition switch: ON
    Evaporator temperature at 0°C (32°F)    		 1.7 to 2.1 V
    X1-6 (TEA) - X1-5 (SGA) - Evaporator temperature sensor signal Ignition switch: ON
    Evaporator temperature at 15°C (59°F)    		 0.9 to 1.3 V
    • *1: for TMC Made
    • *2: except TMC Made
    • *3: w/ PTC Heater Assembly
    • *4: for 2ZR-FE
    1. Waveform 1
      Fig 2: Identifying Waveform 1
      GTY206295Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Item Content
      Terminal No. (Symbol) E30-2 (SOL+) - E30-14 (GND)
      Tool Setting 5 V/DIV., 500 μs/DIV.
      Vehicle Condition Engine is running
      A/C switch: ON
      Blower Switch: LO
    2. Waveform 2
      Fig 3: Identifying Waveform 2
      GTY133112Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Item Content
      Terminal No. (Symbol) E30-23 (BLW) - E30-14 (GND)
      Tool Setting 1 V/DIV., 500 μs/DIV.
      Vehicle Condition Ignition switch ON
      Blower switch: ON
  2. A/C CONTROL ASSEMBLY 
    Fig 4: Identifying E16 Connector Terminals
    GTY206352Courtesy 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
    E16-2 (GND) - Body ground W-B - Body ground Ground for A/C control assembly Always Below 1 V
    E16-3 (LIN1) - E16-2 (GND) SB - W-B*1
    LG - W-B*2    		 LIN communication circuit Ignition switch: ON Pulse generation
    E16-5 (IG+) - E16-2 (GND) B - W-B*1
    V - W-B*2    		 Power source (IG) Ignition switch: off Below 1 V
    E16-5 (IG+) - E16-2 (GND) B - W-B*1
    V - W-B*2    		 Power source (IG) Ignition switch: ON 11 to 14 V
    • *1: for TMC Made
    • *2: except TMC Made
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