AIR CONDITIONING SYSTEM TERMINALS OF ECU


  1. AIR CONDITIONING AMPLIFIER ASSEMBLY

    B000LELE05

    Tech Tips

    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
    I77-1 (IG+) - I77-14 (GND) B - W-B Power source (IG) Ignition switch ON 11 to 14 V
    I77-1 (IG+) - I77-14 (GND) B - W-B Power source (IG) Ignition switch off Below 1 V
    I77-2 (SOL+) - I77-14 (GND)

    W - W-B*3

    GR - W-B*4

    		 Compressor solenoid operation signal

    Engine running

    A/C switch: on

    Blower switch: LO

    Pulse generation

    (See waveform 1)
    I77-5 (TAM) - I77-13 (SG-2) P - GR Ambient temperature sensor signal

    Ignition switch ON

    Ambient temperature: 25°C (77°F)

    		 1.35 to 1.75 V
    I77-5 (TAM) - I77-13 (SG-2) P - GR Ambient temperature sensor signal

    Ignition switch ON

    Ambient temperature: 40°C (104°F)

    		 0.9 to 1.2 V
    I77-7 (FLOQ) - I77-13 (SG-2)

    G - GR*3

    LG - GR*4

    		 A/C flow sensor signal

    Ignition switch ON

    A/C switch: off

    		 3.8 to 4.2 V
    I77-7 (FLOQ) - I77-13 (SG-2)

    G - GR*3

    LG - GR*4

    		 A/C flow sensor signal

    Ignition switch ON

    A/C switch: on

    Blower switch: HI

    		 0.7 to 3.8 V
    I77-8 (LOCK) - I77-13 (SG-2)*1 SB - GR A/C lock sensor signal

    Engine running

    Blower switch: LO

    A/C switch: on

    Pulse generation

    (See waveform 2)
    I77-9 (PRE) - I77-13 (SG-2) R - GR Air conditioning pressure sensor signal

    Engine running

    A/C system operating

    Refrigerant pressure: Abnormal pressure (more than 3025 kPa (30.9 kgf/cm2, 439 psi))

    		 4.80 V or higher
    I77-9 (PRE) - I77-13 (SG-2) R - GR Air conditioning pressure sensor signal

    Engine running

    A/C system operating

    Refrigerant pressure: Abnormal pressure (less than 176 kPa (1.8 kgf/cm2, 25 psi))

    		 Below 0.50 V
    I77-9 (PRE) - I77-13 (SG-2) R - GR Air conditioning pressure sensor signal

    Engine running

    A/C system operating

    Refrigerant pressure: Normal pressure (less than 3025 kPa (30.9 kgf/cm2, 439 psi) and more than 176 kPa (1.8 kgf/cm2, 25 psi))

    		 0.50 to 4.80 V
    I77-10 (S5-3) - I77-13 (SG-2) V - GR Power supply for air conditioning pressure sensor

    Ignition switch ON

    A/C switch: on

    		 4.75 to 5.25 V
    I77-10 (S5-3) - I77-13 (SG-2) V - GR Power supply for air conditioning pressure sensor

    Ignition switch ON

    A/C switch: off

    		 Below 1 V
    I77-11 (CANH) - I77-12 (CANL) V - W CAN communication system CAN communication occurring Pulse generation
    I77-13 (SG-2) - Body ground GR - Body ground Ground for air conditioning pressure sensor, ambient temperature sensor, A/C lock sensor Always Below 1 V
    I77-14 (GND) - Body ground W-B - Body ground Ground for main power supply Always Below 1 V
    I77-15 (PTC1) - I77-14 (GND)*5 G - W-B Quick heater assembly operation signal

    Engine running

    Temperature settings: 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

    		 Below 1 V
    I77-15 (PTC1) - I77-14 (GND)*5 G - W-B Quick heater assembly operation signal

    Engine running

    Temperature settings: 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: Off

    		 11 to 14 V
    I77-16 (PTC2) - I77-14 (GND)*5 L - W-B Quick heater assembly operation signal

    Engine running

    Temperature settings: 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

    		 Below 1 V
    I77-16 (PTC2) - I77-14 (GND)*5 L - W-B Quick heater assembly operation signal

    Engine running

    Temperature settings: 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: Off

    		 11 to 14 V
    I77-20 (MGC) - I77-14 (GND)*1 B - W-B Magnetic clutch operation signal

    Engine running

    Blower switch: LO

    A/C switch: off

    		 11 to 14 V
    I77-20 (MGC) - I77-14 (GND)*1 B - W-B Magnetic clutch operation signal

    Engine running

    Blower switch: LO

    A/C switch: on

    		 Below 1 V
    I77-21 (B) - I77-14 (GND) Y - W-B Power source (Back-up) Always 11 to 14 V
    I77-22 (BLW) - I77-14 (GND) R - W-B Blower motor speed control signal

    Ignition switch ON

    Blower switch: LO

    Pulse generation

    (See waveform 3)
    I77-26 (NAIN) - I77-14 (GND)*2 Y - W-B Ion generator sub-assembly operation condition signal

    Ignition switch ON

    Blower switch: LO

    		 Below 1 V
    I77-26 (NAIN) - I77-14 (GND)*2 Y - W-B Ion generator sub-assembly operation condition signal

    Ignition switch ON

    Blower switch: OFF

    		 4.5 to 5.5 V
    I77-29 (TR) - I77-34 (SG-1) P - LG Room temperature sensor signal

    Ignition switch ON

    Cabin temperature: 25°C (77°F)

    		 1.8 to 2.2 V
    I77-29 (TR) - I77-34 (SG-1) P - LG Room temperature sensor signal

    Ignition switch ON

    Cabin temperature: 40°C (104°F)

    		 1.2 to 1.6 V
    I77-30 (S5-1) - I77-14 (GND) B - W-B Power supply for A/C flow sensor Ignition switch off Below 1 V
    I77-30 (S5-1) - I77-14 (GND) B - W-B Power supply for A/C flow sensor Ignition switch ON 4.5 to 5.5 V
    I77-32 (TSP) - I77-14 (GND)

    Y - W-B*3

    R - W-B*4

    		 Solar sensor signal (for Front passenger side)

    Ignition switch ON

    Solar sensor subjected to electric light

    		 0.8 to 4.3 V
    I77-32 (TSP) - I77-14 (GND)

    Y - W-B*3

    R - W-B*4

    		 Solar sensor signal (for Front passenger side)

    Ignition switch ON

    Solar sensor covered with a cloth

    		 Below 0.8 V
    I77-33 (TSD) - I77-14 (GND)

    R - W-B*3

    Y - W-B*4

    		 Solar sensor signal (for Driver side)

    Ignition switch ON

    Solar sensor subjected to electric light

    		 0.8 to 4.3 V
    I77-33 (TSD) - I77-14 (GND)

    R - W-B*3

    Y - W-B*4

    		 Solar sensor signal (for Driver side)

    Ignition switch ON

    Solar sensor covered with a cloth

    		 Below 0.8 V
    I77-34 (SG-1) - Body ground LG - Body ground Ground for room temperature sensor Always Below 1 V
    I77-37 (LIN1) - I77-14 (GND) V - W-B LIN communication signal Ignition switch ON Pulse generation
    I77-39 (NANO) - I77-14 (GND)*2 R - W-B Ion generator operation signal

    Ignition switch ON

    Blower switch: LO

    		 11 to 14 V
    I77-39 (NANO) - I77-14 (GND)*2 R - W-B Ion generator operation signal

    Ignition switch ON

    Blower switch: OFF

    		 Below 1 V
    z1-2 (BUS G) - Body ground - Ground for BUS IC Always Below 1 V
    z1-3 (BUS) - z1-2 (BUS G) - BUS IC control signal Ignition switch ON Pulse generation
    z1-4 (B BUS) - z1-2 (BUS G) - Power supply for BUS IC Always 11 to 14 V
    z1-5 (SGA) - Body ground - Ground for evaporator temperature sensor Always Below 1 V
    z1-6 (TEA) - z1-5 (SGA) - Evaporator temperature sensor signal

    Ignition switch ON

    Evaporator temperature: 0°C (32°F)

    		 1.7 to 2.1 V
    z1-6 (TEA) - z1-5 (SGA) - Evaporator temperature sensor signal

    Ignition switch ON

    Evaporator temperature: 15°C (59°F)

    		 0.9 to 1.3 V

    • *1: for 2GR-FE

    • *2: w/ Ion Generator Sub-assembly

    • *3: for LHD

    • *4: for RHD

    • *5: w/ PTC Heater


    1. B000K6SE02

      Waveform 1:

      Item Content
      Terminal No. I77-2 (SOL+) - I77-14 (GND)
      Tool Setting 5 V/DIV., 500 μs./DIV.
      Vehicle Condition

      Engine running

      A/C switch: on

      Blower switch: LO
    2. B000JZXE01

      Waveform 2:

      Item Content
      Terminal No. I77-8 (LOCK) - I77-13 (SG-2)
      Tool Setting 200 mV/DIV., 10 ms./DIV.
      Vehicle Condition

      Engine running

      Blower switch: LO

      A/C switch: on
    3. B000LQHE01

      Waveform 3:

      Item Content
      Terminal No. I77-22 (BLW) - I77-14 (GND)
      Tool Setting 1 V/DIV., 500 μs./DIV.
      Vehicle Condition

      Ignition switch ON

      Blower switch: LO

  2. AIR CONDITIONING PANEL (HEATER CONTROL SWITCH BOARD) (for TMC, TMMR Made)

    B000LH2E04

    Tech Tips

    Check from the rear of the connector while it is connected to the air conditioning panel (heater control switch board).

    Terminal No.

    (Symbol)

    		 Wiring Color Terminal Description Condition Specified Condition
    I56-2 (IG+) - I56-6 (GND) R - W-B Power source (IG) Ignition switch off Below 1 V
    I56-2 (IG+) - I56-6 (GND) R - W-B Power source (IG) Ignition switch ON 11 to 14 V
    I56-6 (GND) - Body ground W-B - Body ground Ground for air conditioning panel (heater control switch board) Always Below 1 V
    I56-9 (LIN1) - Body ground V - Body ground LIN communication signal Ignition switch ON Pulse generation
    I56-11 (ILL+) - I56-15 (ILL-) G - W-B Light control switch signal Light control switch off Below 1 V
    I56-11 (ILL+) - I56-15 (ILL-) G - W-B Light control switch signal Light control switch in tail or head position 11 to 14 V
    I56-15 (ILL-) - Body ground W-B - Body ground Ground for air conditioning panel (heater control switch board) illumination Always Below 1 V

  3. AIR CONDITIONING CONTROL ASSEMBLY (for TMMK Made)

    B000LH2E05

    Tech Tips

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

    Terminal No.

    (Symbol)

    		 Wiring Color Terminal Description Condition Specified Condition
    I56-2 (IG+) - I56-6 (GND) R - W-B Power source (IG) Ignition switch off Below 1 V
    I56-2 (IG+) - I56-6 (GND) R - W-B Power source (IG) Ignition switch ON 11 to 14 V
    I56-6 (GND) - Body ground W-B - Body ground Ground for air conditioning control assembly Always Below 1 V
    I56-9 (LIN1) - Body ground V - Body ground LIN communication signal Ignition switch ON Pulse generation
    I56-11 (ILL+) - Body ground G - Body ground Illumination signal Light control switch off Below 1 V
    I56-11 (ILL+) - Body ground G - Body ground Illumination signal Light control switch in tail or head position 11 to 14 V
    I56-15 (ILL-) - Body ground SB - Body ground Illumination signal Light control switch off Below 1 V
    I56-15 (ILL-) - Body ground SB - Body ground Illumination signal Light control switch in tail or head position Pulse generation

  4. COOLER CONTROL SWITCH ASSEMBLY (for 3 Zone Type)

    B000L0GE01

    Tech Tips

    Check from the rear of the connector while it is connected to the cooler control switch assembly.

    Terminal No.

    (Symbol)

    		 Wiring Color Terminal Description Condition Specified Condition
    X1-1 (+B) - X1-16 (GND) R - W-B Power source (Back-up) Always 11 to 14 V
    X1-6 (ACC) - X1-16 (GND) GR - W-B Power source (ACC) Ignition switch off Below 1 V
    X1-6 (ACC) - X1-16 (GND) GR - W-B Power source (ACC) Ignition switch ACC 11 to 14 V
    X1-7 (IG+) - X1-16 (GND) V - W-B Power source (IG) Ignition switch off Below 1 V
    X1-7 (IG+) - X1-16 (GND) V - W-B Power source (IG) Ignition switch ON 11 to 14 V
    X1-8 (ILL+) - X1-16 (GND) G - W-B Light control switch signal Light control switch off Below 1 V
    X1-8 (ILL+) - X1-16 (GND) G - W-B Light control switch signal Light control switch in tail or head position 11 to 14 V
    X1-10 (RLIN) - Body ground B - Body ground LIN communication signal Ignition switch ON Pulse generation
    X1-16 (GND) - Body ground W-B - Body ground Ground for cooler control switch assembly Always Below 1 V