AIR CONDITIONING SYSTEM(for Manual Air Conditioning System) TERMINALS OF ECU


  1. AIR CONDITIONING AMPLIFIER ASSEMBLY

    A00YRGKN03

    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
    G80-1 (IG+) - Body ground GR - Body ground Power source (IG) Ignition switch ON 11 to 14 V
    G80-1 (IG+) - Body ground GR - Body ground Power source (IG) Ignition switch off Below 1 V
    G80-2 (A/C) - Body ground P - Body ground A/C switch signal

    Ignition switch ON

    A/C switch on

    		 11 to 14 V
    G80-2 (A/C) - Body ground P - Body ground A/C switch signal

    Ignition switch ON

    A/C switch off

    		 Below 1 V
    G80-4 (TE) - G80-15 (SG-1) W - B No. 1 cooler thermistor sensor signal

    Ignition switch ON

    Evaporator temperature: 0°C (32°F)

    		 1.7 to 2.1 V
    G80-4 (TE) - G80-15 (SG-1) W - B No. 1 cooler thermistor signal

    Ignition switch ON

    Evaporator temperature: 15°C (59°F)

    		 0.9 to 1.3 V
    G80-5 (SG-2) - Body ground G - Body ground Ground for air conditioner pressure sensor Always Below 1 V
    G80-7 (PRE) - G80-5 (SG-2) BE - 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])

    		 4.62 V or higher
    G80-7 (PRE) - G80-5 (SG-2) BE - G Air conditioner pressure sensor signal

    Engine running

    Air conditioning system operating

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

    		 Below 0.74 V
    G80-7 (PRE) - G80-5 (SG-2) BE - G Air conditioner pressure sensor signal

    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 4.62 V
    G80-8 (CANH) B CAN communication line - -
    G80-9 (CANL) W CAN communication line - -
    G80-11 (SOL+) - Body ground BR - Body ground Compressor solenoid operation signal

    Engine running

    A/C switch on

    Blower switch LO

    Pulse generation

    (See waveform 1)
    G80-13 (PTC1) - Body ground* BR - Body ground Quick heater assembly operation signal

    Engine running

    Temperature setting: MAX HOT

    Ambient temperature: 10°C or less

    Engine coolant temperature: 75°C or less

    Light control switch assembly off

    Blower switch on

    		 Below 1 V
    G80-13 (PTC1) - Body ground* BR - Body ground Quick heater assembly operation signal

    Engine running

    Temperature setting: MAX HOT

    Ambient temperature: 10°C or less

    Engine coolant temperature: 75°C or less

    Light control switch assembly off

    Blower switch off

    		 11 to 14 V
    G80-14 (HR) - Body ground* G - Body ground Heater relay operation signal

    Ignition switch ON

    Blower switch LO

    		 Below 1 V
    G80-14 (HR) - Body ground* G - Body ground Heater relay operation signal

    Ignition switch ON

    Blower switch off

    		 11 to 14 V
    G80-15 (SG-1) - Body ground B - Body ground Ground for No. 1 cooler thermistor Always Below 1 V
    G80-12 (LED) - Body ground GR - Body ground A/C switch indicator signal

    Ignition switch ON

    A/C switch on

    Blower switch on

    		 Below 1 V
    G80-12 (LED) - Body ground GR - Body ground A/C switch indicator signal

    Ignition switch ON

    A/C switch off

    Blower switch on

    		 11 to 14 V
    G80-17 (SBLW) - Body ground GR - Body ground Blower motor operation condition signal

    Ignition switch ON

    Blower switch on

    		 Below 1 V
    G80-17 (SBLW) - Body ground GR - Body ground Blower motor operation condition signal

    Ignition switch ON

    Blower switch off

    		 11 to 14 V
    G80-18 (ECOS) - Body ground R - Body ground Combination switch assembly (ECO switch) signal

    Ignition switch ON

    Combination switch assembly (ECO mode switch) on

    		 Below 1 V
    G80-18 (ECOS) - Body ground R - Body ground Combination switch assembly (ECO switch) signal

    Ignition switch ON

    Combination switch assembly (ECO mode switch) off

    		 11 to 14 V
    G80-19 (PTC2) - Body ground* GR - Body ground Quick heater assembly operation signal

    Engine running

    Temperature setting: MAX HOT

    Ambient temperature: 10°C or less

    Engine coolant temperature: 65°C or less

    Light control switch assembly off

    Blower switch on

    		 Below 1 V
    G80-19 (PTC2) - Body ground* GR - Body ground Quick heater assembly operation signal

    Engine running

    Temperature setting: MAX HOT

    Ambient temperature: 10°C or less

    Engine coolant temperature: 65°C or less

    Light control switch assembly off

    Blower switch off

    		 11 to 14 V
    G80-20 (PTC3) - Body ground* R - Body ground Quick heater assembly operation signal

    Engine running

    Temperature setting: MAX HOT

    Ambient temperature: 10°C or less

    Engine coolant temperature: 70°C or less

    Light control switch assembly off

    Blower switch on

    		 Below 1 V
    G80-20 (PTC3) - Body ground* R - Body ground Quick heater assembly operation signal

    Engine running

    Temperature setting: MAX HOT

    Ambient temperature: 10°C or less

    Engine coolant temperature: 70°C or less

    Light control switch assembly off

    Blower switch off

    		 11 to 14 V
    G80-23 (GND) - Body ground W-B - Body ground Ground for main power supply Always Below 1 Ω
    G80-24 (S5-3) - G80-5 (SG-2) B - G Power supply for air conditioner pressure sensor Ignition switch ON 4.75 to 5.25 V
    G80-24 (S5-3) - G80-5 (SG-2) B - G Power supply for air conditioner pressure sensor Ignition switch off Below 1 V

    *: w/ PTC Heater


    1. A00YVXNN03

      Waveform 1:

      Item Content
      Terminal No. G80-11 (SOL+) - Body ground
      Tool Setting 5 V/DIV., 500 μs/DIV.
      Vehicle Condition

      Engine running

      A/C switch on

      Blower switch LO