AIR CONDITIONING SYSTEM TERMINALS OF ECU


  1. A/C AMPLIFIER

    A01CBN1E16

    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
    G33-1 (IG+) - G33-14 (GND) R - W-B Power source (IG) Engine switch on (IG) 11 to 14 V
    G33-1 (IG+) - G33-14 (GND) R - W-B Power source (IG) Engine switch off Below 1 V
    G33-2 (SOL+) - G33-14 (GND) W - W-B A/C compressor solenoid operation signal

    Engine running

    A/C switch: on

    Blower switch: LO

    Pulse generation

    (See waveform 1)
    G33-3 (PTC1) - G33-14 (GND)*3 R - W-B PTC heater operation signal

    Engine is running (650 rpm or higher)

    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

    		 11 to 14 V
    G33-4 (PTC3) - G33-14 (GND)*3 V - W-B PTC heater operation signal

    Engine is running (650 rpm or higher)

    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

    		 11 to 14 V
    G33-5 (TAM) - G33-14 (GND) L - W-B Ambient temperature sensor signal

    Engine switch on (IG)

    Ambient temperature: 25°C (77°F)

    		 1.35 to 1.75 V
    G33-5 (TAM) - G33-14 (GND) L - W-B Ambient temperature sensor signal

    Engine switch on (IG)

    Ambient temperature: 40°C (104°F)

    		 0.9 to 1.2 V
    G33-6 (DGS) - G34-6 (SG-5)*1 G - Y 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
    G33-7 (DGS1) - G34-6 (SG-5)*1 SB - Y 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
    G33-8 (LOCK) - G33-14 (GND)*2 V - W-B A/C compressor lock sensor signal

    Engine running

    Blower switch: LO

    A/C switch: on

    Pulse generation

    (See waveform 2)
    G33-9 (PRE) - G33-13 (SG-2) GR - G 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
    G33-9 (PRE) - G33-13 (SG-2) GR - G 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
    G33-9 (PRE) - G33-13 (SG-2) GR - G 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
    G33-10 (S5-3) - G33-13 (SG-2) B - G Power supply for A/C pressure sensor

    Engine switch on (IG)

    A/C switch: on

    		 4.75 to 5.25 V
    G33-10 (S5-3) - G33-13 (SG-2) B - G Power supply for A/C pressure sensor

    Engine switch on (IG)

    A/C switch: off

    		 Below 1 V
    G33-11 (CANH) - G33-12 (CANL) V - W CAN communication system CAN communication circuit Pulse generation
    G33-13 (SG-2) - Body ground G - Body ground Ground for A/C pressure sensor, A/C ambient temperature sensor, A/C lock sensor Always Below 1 V
    G33-14 (GND) - Body ground W-B - Body ground Ground for main power supply Always Below 1 V
    G33-15 (NAIN) - G33-14 (GND)*4 GR - W-B No. 1 ion generator sub-assembly operation condition signal

    Engine switch on (IG)

    Blower switch: LO

    Ion generator switch: on

    		 Below 1 V
    G33-15 (NAIN) - G33-14 (GND)*4 GR - W-B No. 1 ion generator sub-assembly operation condition signal

    Engine switch on (IG)

    Blower switch: LO

    Ion generator switch: off

    		 11 to 14 V
    G33-20 (MGC) - G33-14 (GND)*2 G - W-B A/C compressor magnetic clutch operation signal

    Engine switch on (IG)

    Blower switch: LO

    A/C switch: off

    		 11 to 14 V
    G33-20 (MGC) - G33-14 (GND)*2 G - W-B A/C compressor magnetic clutch operation signal

    Engine switch on (IG)

    Blower switch: LO

    A/C switch: on

    		 Below 1 V
    G33-21 (B) - G33-14 (GND) SB - W-B Power source (Back-up) Always 11 to 14 V
    G33-22 (PTC2) - G33-14 (GND)*43 L - W-B PTC heater operation signal

    Engine is running (650 rpm or higher)

    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

    		 11 to 14 V
    G33-23 (BLW) - G33-14 (GND) P - W-B Blower motor speed control signal

    Engine switch on (IG)

    Blower switch: on

    Pulse generation

    (See waveform 3)
    G33-28 (RH) - G33-35 (SG-4) L - B Room humidity sensor signal

    Engine switch on (IG)

    Cabin humidity: 40%

    		 1.61 to 2.24 V
    G33-28 (RH) - G33-35 (SG-4) L - B Room humidity sensor signal

    Engine switch on (IG)

    Cabin humidity: 60%

    		 2.26 to 2.66 V
    G33-29 (TR) - G33-35 (SG-4) GR - B Room temperature sensor signal

    Engine switch on (IG)

    Cabin temperature: 25°C (77°F)

    		 1.8 to 2.2 V
    G33-29 (TR) - G33-35 (SG-4) GR - B Room temperature sensor signal

    Engine switch on (IG)

    Cabin temperature: 40°C (104°F)

    		 1.2 to 1.6 V
    G33-31 (S5-4) - G33-35 (SG-4) R - B Power supply for room humidity sensor Engine switch on (IG) 4.5 to 5.5 V
    G33-32 (TSP) - G33-14 (GND) V - W-B Solar sensor signal (for Front passenger side)

    Engine switch on (IG)

    Solar sensor subjected to electric light

    		 0.8 to 4.3 V
    G33-32 (TSP) - G33-14 (GND) V - W-B Solar sensor signal (for Front passenger side)

    Engine switch on (IG)

    Solar sensor covered with a cloth

    		 Below 0.8 V
    G33-33 (TSD) - G33-14 (GND) R - W-B Solar sensor signal (for Driver side)

    Engine switch on (IG)

    Solar sensor subjected to electric light

    		 0.8 to 4.3 V
    G33-33 (TSD) - G33-14 (GND) R - W-B Solar sensor signal (for Driver side)

    Engine switch on (IG)

    Solar sensor covered with a cloth

    		 Below 0.8 V
    G33-34 (SG-1) - Body ground W-B - Body ground Ground for eco switch assembly Always Below 1 V
    G33-35 (SG-4) - Body ground B - Body ground Ground for room temperature sensor Always Below 1 V
    G33-36 (ECON) - G33-14 (GND) R - W-B ECO mode switch (eco switch assembly) signal

    Engine switch on (IG)

    ECO mode switch (eco switch assembly): off

    		 11 to 14 V
    G33-36 (ECON) - G33-14 (GND) R - W-B ECO mode switch (eco switch assembly) signal

    Engine switch on (IG)

    ECO mode switch (eco switch assembly): on

    		 Below 1 V
    G33-37 (LIN1) - G33-14 (GND) Y - W-B LIN communication signal Engine switch on (IG) Pulse generation
    G33-38 (RDEF) - G33-14 (GND) R - W-B DEF relay signal

    Engine switch on (IG)

    REAR DEF switch: on

    		 Below 1 V
    G33-38 (RDEF) - G33-14 (GND) R - W-B DEF relay signal

    Engine switch on (IG)

    REAR DEF switch: off

    		 11 to 14 V
    G34-1 (RBUS) - G34-21 (RBUG) SB - W BUS IC control signal (for Rear) Engine switch on (IG) Pulse generation
    G34-4 (TEC) - G34-19 (SGND) R - LG Rear evaporator temperature sensor signal

    Engine switch on (IG)

    Rear evaporator temperature: 0°C (32°F)

    		 2.0 to 2.4 V
    G34-4 (TEC) - G34-19 (SGND) R - LG Rear evaporator temperature sensor signal

    Engine switch on (IG)

    Rear evaporator temperature: 15°C (59°F)

    		 1.4 to 1.8 V
    G34-5 (RNIN) - G34-20 (GND2)*5 LG - W-B No. 2 ion generator sub-assembly operation condition signal

    Engine switch on (IG)

    Blower switch: LO

    Ion generator switch: on

    		 Below 1 V
    G34-5 (RNIN) - G34-20 (GND2)*5 LG - W-B No. 2 ion generator sub-assembly operation condition signal

    Engine switch on (IG)

    Blower switch: LO

    Ion generator switch: off

    		 11 to 14 V
    G34-6 (SG-5) - Body ground*1 Y - Body ground Ground for smog ventilation sensor Always Below 1 V
    G34-7 (SG-6) - Body ground G - Body ground Ground for rear room temperature sensor Always Below 1 V
    G34-9 (NAI) - G34-20 (GND2)*4, *5 LG - W-B Ion generator switch (air purifier switch assembly) indicator signal

    Engine switch on (IG)

    Blower switch: Lo

    Ion generator switch: on

    		 Below 1.5 V
    G34-9 (NAI) - G34-20 (GND2)*4, *5 LG - W-B Ion generator switch (air purifier switch assembly) indicator signal

    Engine switch on (IG)

    Blower switch: Lo

    Ion generator switch: off

    		 10 to 14 V
    G34-11 (NANO) - G34-20 (GND2)*4 LG - W-B No. 1 ion generator sub-assembly operation signal

    Engine switch on (IG)

    Blower switch: Lo

    Ion generator switch: on

    		 Below 1 V
    G34-11 (NANO) - G34-20 (GND2)*4 LG - W-B No. 1 ion generator sub-assembly operation signal

    Engine switch on (IG)

    Blower switch: Lo

    Ion generator switch: off

    		 4.75 to 5.25 V
    G34-12 (RNNO) - G34-20 (GND2)*5 GR - W-B No. 2 ion generator sub-assembly operation signal

    Engine switch on (IG)

    Blower switch: Lo

    Ion generator switch: on

    		 Below 1 V
    G34-12 (RNNO) - G34-20 (GND2)*5 GR - W-B No. 2 ion generator sub-assembly operation signal

    Engine switch on (IG)

    Blower switch: Lo

    Ion generator switch: off

    		 4.75 to 5.25 V
    G34-13 (RLIN) - G34-20 (GND2) Y - W-B LIN communication signal Engine switch on (IG) Pulse generation
    G34-17 (TR) - G34-7 (SG-6) B - G Rear room temperature sensor signal

    Engine switch on (IG)

    Cabin temperature: 25°C (77°F)

    		 1.8 to 2.2 V
    G34-17 (TR) - G34-7 (SG-6) B - G Rear room temperature sensor signal

    Engine switch on (IG)

    Cabin temperature: 40°C (104°F)

    		 1.2 to 1.6 V
    G34-18 (NASW) - G34-20 (GND2)*4, *5 GR - W-B Ion generator switch (air purifier switch assembly) signal

    Engine switch on (IG)

    Ion generator switch (air purifier switch assembly): on

    		 Below 1 V
    G34-18 (NASW) - G34-20 (GND2)*4, *5 GR - W-B Ion generator switch (air purifier switch assembly) signal

    Engine switch on (IG)

    Ion generator switch (air purifier switch assembly): off

    		 11 to 14 V
    G34-19 (SGND) - Body ground LG - Body ground Ground for rear evaporator temperature sensor Always Below 1 V
    G34-20 (GND2) - Body ground W-B - Body ground Ground for power supply Always Below 1 V
    G34-21 (RBUG) - Body ground W - Body ground Ground for BUS IC (for Rear) Always Below 1 V
    G34-22 (BLWH) - G34-20 (GND2) Y - W-B Rear blower motor control signal

    Engine switch on (IG)

    Rear blower switch: on

    Pulse generation

    (See waveform 4)
    G34-23 (RBBU) - G34-21 (RBUG) L - W Power supply for BUS IC (for Rear) Engine switch on (IG) 11 to 14 V
    G34-24 (+B2) - G34-20 (GND2) SB - W-B Power source (Back-up) Always 11 to 14 V
    z12-2 (BUS G) - Body ground - Ground for BUS IC Always Below 1 V
    z12-3 (BUS) - z12-2 (BUS G) - BUS IC control signal Engine switch on (IG) Pulse generation
    z12-4 (B BUS) - z12-2 (BUS G) - Power supply for BUS IC Engine switch off Below 1 V
    z12-4 (B BUS) - z12-2 (BUS G) - Power supply for BUS IC Engine switch on (IG) 11 to 14 V
    z12-5 (SG) - Body ground - Ground for evaporator temperature sensor Always Below 1 V
    z12-6 (TE) - z12-5 (SG) - A/C evaporator temperature sensor signal

    Engine switch on (IG)

    Evaporator temperature: 0°C (32°F)

    		 1.7 to 2.1 V
    z12-6 (TE) - z12-5 (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/ Automatic Recirculation Control System

    • *2: for 2GR-FE

    • *3: w/ PTC Heater Assembly

    • *4: w/ No. 1 Ion Generator Sub-assembly

    • *5: w/ No. 2 Ion Generator Sub-assembly


    1. A01CEV6E02

      Waveform 1:

      Item Content
      Terminal No. G33-2 (SOL+) - G33-14 (GND)
      Tool Setting 5 V/DIV., 500 μs/DIV.
      Vehicle Condition

      Engine running

      A/C switch: on
    2. A01CED7E01

      Waveform 2:

      Item Content
      Terminal No. G33-8 (LOCK) - G33-14 (GND)
      Tool Setting 200 mV/DIV., 10 ms./DIV.
      Vehicle Condition

      Engine running

      Blower switch: LO

      A/C switch: on
    3. A01CEJ0E01

      Waveform 3:

      Item Content
      Terminal No. G33-23 (BLW) - G33-14 (GND)
      Tool Setting 1 V/DIV., 500 μs/DIV.
      Vehicle Condition

      Engine switch on (IG)

      Blower switch: on
    4. A01CGIKE01

      Waveform 4:

      Item Content
      Terminal No. G34-22 (BLWH) - G34-20 (GND2)
      Tool Setting 2 V/DIV., 500 μs/DIV.
      Vehicle Condition

      Engine switch on (IG)

      Rear blower switch: on

  2. AIR CONDITIONING CONTROL ASSEMBLY (for Front)

    A01CANUE01

    Tech Tips

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

    Terminal No.

    (Symbol)

    		 Wiring Color Terminal Description Condition Specified Condition
    G26-1 (+B) - G26-4 (GND) R - BR Power source (Back-up) Always 11 to 14 V
    G26-3 (LIN1) - G26-4 (GND) Y - BR LIN communication signal Engine switch on (IG) Pulse generation
    G26-4 (GND) - Body ground BR - Body ground Ground for front air conditioning control assembly Always Below 1 V
    G26-5 (IG+) - G26-4 (GND) R - BR Power source (IG) Engine switch off Below 1 V
    G26-5 (IG+) - G26-4 (GND) R - BR Power source (IG) Engine switch on (IG) 11 to 14 V
    G26-6 (ACC) - G26-4 (GND) GR - BR Power source (ACC) Engine switch off Below 1 V
    G26-6 (ACC) - G26-4 (GND) GR - BR Power source (ACC) Engine switch on (ACC) 11 to 14 V

  3. INTEGRATION CONTROL AND PANEL ASSEMBLY (REAR A/C CONTROL ASSEMBLY)

    A01CD5VE02

    Tech Tips

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

    Terminal No.

    (Symbol)

    		 Wiring Color Terminal Description Condition Specified Condition
    R9-5 (RLIN) - R9-12 (E) Y - W-B LIN communication signal (for Rear) Engine switch on (IG) Pulse generation
    R9-7 (IG+) - R9-12 (E) R - W-B Power source (IG) Engine switch off Below 1 V
    R9-7 (IG+) - R9-12 (E) R - W-B Power source (IG) Engine switch on (IG) 11 to 14 V
    R9-12 (E) - Body ground W-B - Body ground Ground for rear A/C control assembly Always Below 1 V