AIR CONDITIONING SYSTEM TERMINALS OF ECU


  1. A/C AMPLIFIER

    A019PCQE30

    Tech Tips

    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
    F50-1 (IG+) - F50-14 (GND) P - W-B Power source (IG) Engine switch on (IG) 11 to 14 V
    F50-1 (IG+) - F50-14 (GND) P - W-B Power source (IG) Engine switch off Below 1 V
    F50-2 (SOL+) - F50-14 (GND) SB - W-B A/C compressor solenoid operation signal

    Engine running

    A/C switch: on

    Blower switch: LO

    Pulse generation

    (See waveform 1)
    F50-5 (TAM) - F50-13 (SG-2) V - LG Ambient temperature sensor signal

    Engine switch on (IG)

    Ambient temperature: 25°C (77°F)

    		 1.35 to 1.75 V
    F50-5 (TAM) - F50-13 (SG-2) V - LG Ambient temperature sensor signal

    Engine switch on (IG)

    Ambient temperature: 40°C (104°F)

    		 0.9 to 1.2 V
    F50-6 (DGS) - F50-13 (SG-2)*1 SB - LG Smog ventilation sensor signal (HC, CO) After 30 seconds from engine switch on (IG) and sensor exposed to exhaust gas (HC, CO) 1.0 to 4.5 V
    F50-7 (FLOQ) - F50-13 (SG-2) Y - LG A/C flow sensor signal

    Engine switch on (IG)

    A/C switch: off

    		 3.8 to 4.2 V
    F50-7 (FLOQ) - F50-13 (SG-2) Y - LG A/C flow sensor signal

    Engine switch on (IG)

    A/C switch: on

    Blower switch: HI

    		 0.7 to 3.8 V
    F50-8 (LOCK) - F50-13 (SG-2)*4 LG - LG A/C compressor lock sensor signal

    Engine running

    Blower switch: LO

    A/C switch: on

    Pulse generation

    (See waveform 2)
    F50-9 (PRE) - F50-13 (SG-2) W - LG A/C pressure sensor signal

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

    		 4.84 V or higher
    F50-9 (PRE) - F50-13 (SG-2) W - LG A/C pressure sensor signal

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

    		 Below 0.73 V
    F50-9 (PRE) - F50-13 (SG-2) W - LG A/C pressure sensor signal

    Start engine, Operate A/C system, 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))

    		 0.73 to 4.84 V
    F50-10 (S5-3) - F50-13 (SG-2) P - LG Power supply for A/C pressure sensor Engine switch on (IG) 4.75 to 5.25 V
    F50-10 (S5-3) - F50-13 (SG-2) P - LG Power supply for A/C pressure sensor Engine switch off Below 1 V
    F50-11 (CANH) - F50-12 (CANL) B - W CAN communication system CAN communication circuit Pulse generation
    F50-13 (SG-2) - Body ground LG - Body ground Ground for A/C pressure sensor, A/C ambient temperature sensor, A/C lock sensor, smog ventilation sensor, A/C mass flow sensor Always Below 1 V
    F50-14 (GND) - Body ground W-B - Body ground Ground for main power supply Always Below 1 V
    F50-20 (MGC) - F50-14 (GND)*4 BE - W-B A/C compressor magnetic clutch operation signal

    Engine switch on (IG)

    Blower switch: LO

    A/C switch: off

    		 11 to 14 V
    F50-20 (MGC) - F50-14 (GND)*4 BE - W-B A/C compressor magnetic clutch operation signal

    Engine switch on (IG)

    Blower switch: LO

    A/C switch: on

    		 Below 1 V
    F50-21 (B) - F50-14 (GND) G - W-B Power source (Back-up) Always 11 to 14 V
    F50-23 (BLW) - F50-14 (GND) L - W-B Blower motor speed control signal

    Engine switch on (IG)

    Blower switch: LO

    Pulse generation

    (See waveform 3)
    F50-29 (TR) - F50-34 (SG-1) BE - V Room temperature sensor signal

    Engine switch on (IG)

    Cabin temperature: 25°C (77°F)

    		 1.8 to 2.2 V
    F50-29 (TR) - F50-34 (SG-1) BE - V Room temperature sensor signal

    Engine switch on (IG)

    Cabin temperature: 40°C (104°F)

    		 1.2 to 1.6 V
    F50-30 (S5-1) - F50-13 (SG-2) BR - LG Power supply for A/C flow sensor Engine switch off Below 1 V
    F50-30 (S5-1) - F50-13 (SG-2) BR - LG Power supply for A/C flow sensor Engine switch on (IG) 4.5 to 5.5 V
    F50-32 (TSP) - F50-14 (GND)

    Y - W-B*2

    R - W-B*3

    		 Solar sensor signal (for Front passenger side)

    Engine switch on (IG)

    Solar sensor subjected to electric light

    		 0.8 to 4.3 V
    F50-32 (TSP) - F50-14 (GND)

    Y - W-B*2

    R - W-B*3

    		 Solar sensor signal (for Front passenger side)

    Engine switch on (IG)

    Solar sensor covered with a cloth

    		 Below 0.8 V
    F50-33 (TSD) - F50-14 (GND)

    R - W-B*2

    Y - W-B*3

    		 Solar sensor signal (for Driver side)

    Engine switch on (IG)

    Solar sensor subjected to electric light

    		 0.8 to 4.3 V
    F50-33 (TSD) - F50-14 (GND)

    R - W-B*2

    Y - W-B*3

    		 Solar sensor signal (for Driver side)

    Engine switch on (IG)

    Solar sensor covered with a cloth

    		 Below 0.8 V
    F50-34 (SG-1) - Body ground V - Body ground Ground for room temperature sensor Always Below 1 V
    F50-37 (LIN1) - F50-14 (GND)*5 SB - W-B LIN communication signal Engine switch on (IG) Pulse generation
    F51-3 (DGS1) - F50-14 (GND)*1 B - W-B Smog ventilation sensor signal (NOx) After 30 seconds from engine switch on (IG) and sensor exposed to exhaust gas (NOx) 1.0 to 4.5 V
    z6-2 (BUSG) - Body ground - Ground for BUS IC Always Below 1 V
    z6-3 (BUS) - z6-2 (BUSG) - BUS IC control signal Engine switch on (IG) Pulse generation
    z6-4 (BBUS) - z6-2 (BUSG) - Power supply for BUS IC Always 11 to 14 V
    z6-5 (SG) - Body ground - Ground for evaporator temperature sensor Always Below 1 V
    z6-6 (TE) - z6-5 (SG) - A/C evaporator temperature sensor signal

    Engine switch on (IG)

    Evaporator temperature: 0°C (32°F)

    		 1.7 to 2.1 V
    z6-6 (TE) - z6-5 (SG) - A/C evaporator temperature sensor signal

    Engine switch on (IG)

    Evaporator temperature: 15°C (59°F)

    		 0.9 to 1.3 V

    • *1: w/ Smog Ventilation Sensor

    • *2: for LHD

    • *3: for RHD

    • *4: for 2GR-FE

    • *5: w/ Multi-display


    1. A019LKOE02

      Waveform 1:

      Item Content
      Terminal No. F50-2 (SOL+) - F50-14 (GND)
      Tool Setting 5 V/DIV., 500 μs/DIV.
      Vehicle Condition

      Engine running

      A/C switch: on
    2. A019MSSE01

      Waveform 2:

      Item Content
      Terminal No. F50-8 (LOCK) - F50-13 (SG-2)
      Tool Setting 200 mV/DIV., 10 ms./DIV.
      Vehicle Condition

      Engine running

      Blower switch: LO

      A/C switch: on
    3. A019JV0E01

      Waveform 3:

      Item Content
      Terminal No. F50-23 (BLW) - F50-14 (GND)
      Tool Setting 1 V/DIV., 500 μs/DIV.
      Vehicle Condition

      Engine switch on (IG)

      Blower switch: LO

  2. MULTI-MEDIA MODULE RECEIVER ASSEMBLY (A/C CONTROL PANEL) (w/ Navigation System) Click here

  3. RADIO RECEIVER ASSEMBLY (A/C CONTROL PANEL) (w/ Audio and Visual System (w/ Multi-display)) Click here

  4. RADIO RECEIVER ASSEMBLY (A/C CONTROL PANEL) (w/ Audio and Visual System (w/o Multi-display))

    A019P7IE01

    Tech Tips

    Check from the rear of the connector while it is connected to the radio receiver assembly (A/C control panel).

    Terminal No.

    (Symbol)

    		 Wiring Color Terminal Description Condition Specified Condition
    G7-1 (B) - Body ground V - Body ground Power source (Back-up) Always 11 to 14 V
    G8-5 (TX+) Y AVC-LAN communication signal - -
    G8-9 (GND) - Body ground BR - Body ground Ground for radio receiver (A/C control panel) Always Below 1 V
    G8-13 (TX-) W AVC-LAN communication signal - -
    G8-16 (ACC) - G8-9 (GND) GR - BR Power source (ACC) Engine switch off Below 1 V
    G8-16 (ACC) - G8-9 (GND) GR - BR Power source (ACC) Engine switch on (ACC) 11 to 14 V

  5. ACCESSORY METER ASSEMBLY (w/o Multi-display) Click here

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

  7. MULTI-DISPLAY ASSEMBLY (w/ Audio and Visual System (w/ Multi-display)) Click here