AIR CONDITIONING SYSTEM TERMINALS OF ECU


  1. AIR CONDITIONING AMPLIFIER ASSEMBLY

    A003VFUE72

    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
    H85-1 (IG+) - H85-14 (GND) B - W-B Power source (IG) Power switch on (IG) 11 to 14 V
    Power switch off Below 1 V
    H85-5 (TAM) - H85-13 (SG-2) BE - G Ambient temperature sensor signal

    Power switch on (IG)

    Ambient temperature: 25°C (77°F)

    		 1.35 to 1.75 V

    Power switch on (IG)

    Ambient temperature: 40°C (104°F)

    		 0.9 to 1.2 V
    H85-9 (PRE) - H85-13 (SG-2) L - G A/C pressure sensor signal

    A/C system operating, Refrigerant pressure: Abnormal pressure (more than 3140 kPa (32.0 kgf/cm2, 455 psi))

    		 4.88 V or higher

    A/C system operating, Refrigerant pressure: Abnormal pressure (less than 196 kPa (2.0 kgf/cm2, 28 psi))

    		 Below 0.65 V

    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))

    		 0.65 to 4.88 V
    H85-10 (S5-3) - H85-13 (SG-2) B - G Power supply for A/C pressure sensor Power switch on (IG) 4.75 to 5.25 V
    Power switch off Below 1 V
    H85-11 (CANH) - H85-12 (CANL) Y - BR CAN communication system CAN communication circuit Pulse generation
    H85-13 (SG-2) - Body ground G - Body ground Ground for A/C pressure sensor, ambient temperature sensor Always Below 1 V
    H85-14 (GND) - Body ground W-B - Body ground Ground for main power supply Always Below 1 V
    H85-15 (ECON) - H85-14 (GND) R - W-B Combination switch (ECO switch) signal

    Power switch on (IG)

    Combination switch (ECO switch) off

    		 11 to 14 V

    Power switch on (IG)

    Combination switch (ECO switch) on

    		 Below 1 V
    H85-16 (PTC3) - H85-14 (GND)*2 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: 65°C (149°F) or lower

    Light control switch off

    Blower switch on

    		 11 to 14 V
    H85-18 (PTC1) - H85-14 (GND)*2 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: 75°C (167°F) or lower

    Light control switch off

    Blower switch on

    		 11 to 14 V
    H85-21 (B) - H85-14 (GND) Y - W-B Power source (Back-up) Power switch off 11 to 14 V
    H85-23 (BLW) - H85-14 (GND) W - W-B Blower motor speed control signal

    Power switch on (IG)

    Blower switch: LO

    Pulse generation

    (See waveform 1)
    H85-28 (RH) - H85-14 (GND)*1 LG - W-B Glass humidity sensor signal

    Power switch on (IG)

    Humidity: 40%

    Cabin temperature: 25°C (77°F)

    		 2.09 V

    Power switch on (IG)

    Humidity: 60%

    Cabin temperature: 25°C (77°F)

    		 2.81 V
    H85-29 (TR) - H85-34 (SG-1) B - W Room temperature sensor signal

    Power switch on (IG)

    Cabin temperature: 25°C (77°F)

    		 1.8 to 2.2 V

    Power switch on (IG)

    Cabin temperature: 40°C (104°F)

    		 1.2 to 1.6 V
    H85-31 (S5-4) - H85-14 (GND)*1 V - W-B Power supply for glass humidity sensor Power switch off Below 1 V
    Power switch on (IG) 4.5 to 5.5 V
    H85-32 (TSP) - H85-14 (GND) BR - W-B Solar sensor signal (for front passenger side)

    Power switch on (IG)

    Solar sensor subjected to electric light

    		 0.8 to 4.3 V

    Power switch on (IG)

    Solar sensor covered with a cloth

    		 Below 0.8 V
    H85-33 (TSD) - H85-14 (GND) B - W-B Solar sensor signal (for driver side)

    Power switch on (IG)

    Solar sensor subjected to electric light

    		 0.8 to 4.3 V

    Power switch on (IG)

    Solar sensor covered with a cloth

    		 Below 0.8 V
    H85-34 (SG-1) - Body ground W - Body ground Ground for room temperature sensor Always Below 1 V
    H85-35 (SG-4) - Body ground W - Body ground Ground for combination switch assembly (ECO switch) Always Below 1 V
    H85-37 (LIN1) - H85-14 (GND) V - W-B LIN communication signal Power switch on (IG) Pulse generation
    H85-38 (PTC2) - H85-14 (GND)*2 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: 65°C (149°F) to 70°C (158°F)

    Light control switch off

    Blower switch on

    		 11 to 14 V
    H86-7 (LBLO) - Body ground*1 BR - Body ground Ground for air conditioning thermistor assembly Always Below 1 V
    H86-15 (TFG) - H85-14 (GND)*1 GR - W-B Glass temperature signal

    Power switch on (IG)

    Glass temperature: 25°C (77°F)

    		 2.200 kΩ
    H86-16 (TNG) - H85-14 (GND)*1 SB - W-B Glass surroundings signal

    Power switch on (IG)

    Glass temperature: 25°C (77°F)

    		 2.200 kΩ
    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 Power switch on (IG) Pulse generation
    z1-4 (B BUS) - z1-2 (BUS G) - Power supply for BUS IC Power switch off 11 to 14 V
    z1-5 (SGA) - Body ground - Ground for evaporator temperature sensor Always Below 1 V
    z1-6 (TEA) - z1-5 (SGA) - A/C evaporator temperature sensor signal

    Power switch on (IG)

    Evaporator temperature: 0°C (32°F)

    		 2.0 to 2.4 V

    Power switch on (IG)

    Evaporator temperature: 15°C (59°F)

    		 1.4 to 1.8 V

    • *1: w/ Air Conditioning Thermistor Assembly

    • *2: w/ PTC Heater Assembly


    1. A003XNJE01

      Waveform 1:

      Item Content
      Terminal No. H85-23 (BLW) - H85-14 (GND)
      Tool Setting 1 V/DIV., 500 μs/DIV.
      Vehicle Condition

      Power switch on (IG)

      Blower switch: LO

  2. CENTER CLUSTER MODULE CIRCUIT (AIR CONDITIONING CONTROL ASSEMBLY)

    A003YAYE02

    Tech Tips

    Check from the rear of the connector while it is connected to the center cluster module circuit (air conditioning control assembly).

    Terminal No.

    (Symbol)

    		 Wiring Color Terminal Description Condition Specified Condition
    H80-1 (ACC) - Body ground V - Body ground Power source (ACC) Power switch on (ACC) 11 to 14 V
    Power switch off Below 1 V
    H80-2 (IG+) - Body ground B - Body ground Power source (IG) Power switch on (IG) 11 to 14 V
    Power switch off Below 1 V
    H80-4 (+B) - Body ground R - Body ground Power source (Back-up) Power switch off 11 to 14 V
    H80-6 (ILL+) - Body ground G - Body ground Light control switch signal Light control switch tail or head position 11 to 14 V
    Light control switch off Below 1 V
    H80-11 (LIN1) - Body ground V - Body ground LIN communication signal Power switch on (IG) Pulse generation
    H80-16 (GND) - Body ground W-B - Body ground Ground for center cluster module circuit (air conditioning control assembly) Always Below 1 V

  3. POWER MANAGEMENT CONTROL ECU Click here

  4. MULTI-MEDIA MODULE RECEIVER ASSEMBLY Click here

  5. CENTER INSTRUMENT CLUSTER FINISH PANEL ASSEMBLY (MULTI-DISPLAY) Click here