AIR CONDITIONING SYSTEM TERMINALS OF ECU


  1. AIR CONDITIONING AMPLIFIER ASSEMBLY

    B001MF8E02

    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 Air conditioning pressure sensor signal

    • Air conditioning system operating

    • Refrigerant pressure: Abnormal pressure (more than 3140 kPa (32.0 kgf/cm2, 455 psi))

    		 4.88 V or higher

    • Air conditioning system operating

    • Refrigerant pressure: Abnormal pressure (less than 196 kPa (2.0 kgf/cm2, 28 psi))

    		 Below 0.65 V

    • Air conditioning 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 air conditioning 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 air conditioning 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 assembly (ECO switch) signal

    • Power switch on (IG)

    • Combination switch assembly (ECO switch) off

    		 11 to 14 V

    • Power switch on (IG)

    • Combination switch assembly (ECO switch) on

    		 Below 1 V
    H85-16 (PTC3) - H85-14 (GND)*2 BR - W-B PTC heater assembly 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 15.5 V
    H85-18 (PTC1) - H85-14 (GND)*2 W - W-B PTC heater assembly 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 15.5 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 assembly 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 15.5 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 sensor 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 temperature sensor 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) - 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. B001N04E34

      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)

    B001MLIE02

    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. RADIO RECEIVER ASSEMBLY (w/ Navigation System) Click here

  5. RADIO RECEIVER ASSEMBLY (w/o Navigation System) Click here

  6. MULTI-DISPLAY (w/ Navigation System) Click here

  7. MULTI-DISPLAY (w/o Navigation System) Click here