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AIR CONDITIONING SYSTEM TERMINALS OF ECU

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  1. A01FMYTN26

    AIR CONDITIONING AMPLIFIER ASSEMBLY

    Tip:

    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
    O9-1 (GND) - Body ground BR - Body ground Ground for main power supply Always Below 1 V
    O9-3 (BLW) - O9-1 (GND) BE - BR Blower motor speed control signal

    • Engine switch on (IG)

    • Blower switch: LO

    Pulse generation

    (See waveform 1)
    O9-4 (SOL+) - O9-1 (GND) P - BR Compressor solenoid operation signal

    • Engine running

    • Blower switch: LO

    • A/C switch: on

    Pulse generation

    (See waveform 2)
    O9-5 (IG+) - O9-1 (GND) R - BR Power source (IG) Engine switch on (IG) 11 to 14 V
    Engine switch off Below 1 V
    O9-6 (+B1) - O9-1 (GND) L - BR Power source (Back-up) Always 11 to 14 V
    O9-21 (RLIN) - O9-1 (GND) P - BR LIN communication signal Engine switch on (IG) Pulse generation
    O9-29 (ECOS) - O9-1 (GND) GR - BR Combination switch assembly (ECO mode switch) signal

    • Engine switch on (IG)

    • Combination switch assembly (ECO mode switch) off

    		 11 to 14 V

    • Engine switch on (IG)

    • Combination switch assembly (ECO mode switch) on

    		 Below 1 V
    O10-1 (SG-1) - Body ground W - Body ground Ground for cooler (room temp. sensor) thermistor Always Below 1 V
    O10-3 (CANH) - O10-4 (CANL) P - B CAN communication system CAN communication is performed Pulse generation
    O10-9 (PRE) - O10-32 (SG-2) W - G Air conditioner pressure sensor signal

    • Engine running

    • Air conditioning system operating

    • Refrigerant pressure: Abnormal pressure (more than 3025 kPa (30.8 kgf/cm2, 439 psi))

    		 4.61 V or higher

    • Engine running

    • Air conditioning system operating

    • Refrigerant pressure: Abnormal pressure (less than 176 kPa (1.8 kgf/cm2, 26 psi))

    		 Below 0.74 V

    • Engine running

    • Air conditioning system operating

    • Refrigerant pressure: Normal pressure (less than 3025 kPa (30.8 kgf/cm2, 439 psi) and more than 176 kPa (1.8 kgf/cm2, 26 psi))

    		 0.74 to 4.61 V
    O10-10 (TAM) - O10-32 (SG-2) V - G Thermistor assembly signal

    • Engine switch on (IG)

    • Ambient temperature: 25°C (77°F)

    		 1.35 to 1.75 V

    • Engine switch on (IG)

    • Ambient temperature: 40°C (104°F)

    		 0.9 to 1.2 V
    O10-13 (S5-3) - O10-32 (SG-2) B - G Power supply for air conditioner pressure sensor Engine switch on (IG) 4.75 to 5.25 V
    Engine switch off Below 1 V
    O10-16 (TR) - O10-1 (SG-1) B - W Cooler (room temp. sensor) thermistor signal

    • Engine switch on (IG)

    • Cabin temperature: 25°C (77°F)

    		 1.8 to 2.2 V

    • Engine switch on (IG)

    • Cabin temperature: 40°C (104°F)

    		 1.2 to 1.6 V
    O10-24 (DGS) - O10-32 (SG-2)* P - G Smog ventilation sensor signal (HC, CO) After 28 seconds from engine switch on (IG) and sensor exposed to exhaust gas (HC, CO) 1.0 to 4.5 V
    O10-25 (DGS1) - O10-32 (SG-2)* GR - G Smog ventilation sensor signal (NOx) After 120 seconds from engine switch on (IG) and sensor exposed to exhaust gas (NOx) 1.0 to 4.5 V
    O10-32 (SG-2) - Body ground G - Body ground Ground for air conditioner pressure sensor, thermistor assembly, smog ventilation sensor* Always Below 1 V
    z1-1 (BUS G) - Body ground - Ground for BUS IC Always Below 1 V
    z1-2 (BUS) - z1-1 (BUS G) - BUS IC control signal Engine switch on (IG) Pulse generation
    z1-3 (B BUS) - z1-1 (BUS G) - Power supply for BUS IC Always 11 to 14 V
    z1-11 (TEA) - z1-12 (SGA) - No. 1 cooler thermistor signal

    • Engine switch on (IG)

    • Evaporator temperature: 0°C (32°F)

    		 2.0 to 2.4 V

    • Engine switch on (IG)

    • Evaporator temperature: 15°C (59°F)

    		 1.4 to 1.8 V
    z1-12 (SGA) - Body ground - Ground for No. 1 cooler thermistor Always Below 1 V

    • *: w/ Mirror Heater


    1. A01FKR0N01

      Waveform 1:

      Item Content
      Terminal No. O9-3 (BLW) - O9-1 (GND)
      Tool Setting 1 V/DIV., 500 μs./DIV.
      Vehicle Condition

      • Engine switch on (IG)

      • Blower switch: LO
    2. A01FL8GN07

      Waveform 2:

      Item Content
      Terminal No. O9-4 (SOL+) - O9-1 (GND)
      Tool Setting 5 V/DIV., 500 μs./DIV.
      Vehicle Condition

      • Engine running

      • Blower switch: LO

      • A/C switch: on
  2. A01FKQCN21

    AIR CONDITIONING CONTROL ASSEMBLY

    Tip:

    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
    O64-6 (LIN1) - Body ground P - Body ground LIN communication signal Engine switch on (IG) Pulse generation
    O64-8 (IG+) - O64-14 (GND) G - W-B Power source (IG) Engine switch off Below 1 V
    Engine switch on (IG) 11 to 14 V
    O64-14 (GND) - Body ground W-B - Body ground Ground for air conditioning control assembly Always Below 1 V
    O64-15 (ILL-) - Body ground BE - Body ground Illumination signal Light control switch off Below 1 V
    Light control switch in tail or head position Pulse generation
    O64-16 (ILL+) - Body ground G - Body ground Illumination signal Light control switch off Below 1 V
    Light control switch in tail or head position 11 to 14 V