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


  1. AIR CONDITIONING AMPLIFIER ASSEMBLY

    A01LVDZN13

    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
    E28-1 (IG+) - E28-14 (GND) L - BR Power source (IG) Ignition switch ON 11 to 14 V
    Ignition switch off Below 1 V
    E28-2 (SOL+) - E28-14 (GND)*1 LG - BR Compressor solenoid operation signal

    • Engine running

    • A/C switch: On

    • Blower switch: LO

    Pulse generation

    (See waveform 1)
    E28-3 (PTC2) - E28-14 (GND)*4 R - BR Quick heater assembly operation signal

    • Engine running

    • Temperature settings: MAX HOT

    • Ambient temperature: 10 °C or lower

    • Engine coolant temperature: 65 °C or lower

    • Light control switch assembly off

    • Blower switch: On

    		 Below 1 V

    • Engine running

    • Temperature settings: MAX HOT

    • Ambient temperature: 10 °C or lower

    • Engine coolant temperature: 65 °C or lower

    • Light control switch assembly on

    • Blower switch: Off

    		 11 to 14 V
    E28-9 (PRE) - E28-13 (SG-2)*1 L - G Air conditioner pressure sensor signal

    • Engine running

    • A/C system operating

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

    		 4.62 V or higher

    • Engine running

    • A/C system operating

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

    		 Below 0.74 V

    • Engine running

    • A/C system operating

    • Refrigerant 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
    E28-10 (S5-3) - E28-13 (SG-2)*1 V - G Power supply for air conditioner pressure sensor Ignition switch ON 4.75 to 5.25 V
    Ignition switch off Below 1 V
    E28-11 (CANH) - E28-12 (CANL) Y - W CAN communication system CAN communication being performed Pulse generation
    E28-13 (SG-2) - Body ground*1 G - Body ground Ground for air conditioner pressure sensor Always Below 1 V
    E28-14 (GND) - Body ground BR - Body ground Ground for main power supply Always Below 1 V
    E28-21 (B) - E28-14 (GND) W - BR Power source (Back-up) Always 11 to 14 V
    E28-22 (BLW) - E28-14 (GND) R - BR Blower motor speed control signal

    • Ignition switch ON

    • Blower switch: LO

    Pulse generation

    (See waveform 2)
    E28-27 (HLS) - E28-14 (GND)*4 V - BR Light control switch signal Light control switch: On 11 to 14 V
    Light control switch: Off Below 1 V
    E28-29 (TR) - E28-34 (SG-1)*1 GR - V Cooler (room temp. sensor) thermistor signal

    • Ignition switch ON

    • Cabin temperature: 25°C (77°F)

    		 1.8 to 2.2 V

    • Ignition switch ON

    • Cabin temperature: 40°C (104°F)

    		 1.2 to 1.6 V
    E28-30 (S5-1) - E28-14 (GND)*1 LG - BR Power supply for cooler (solar sensor) thermistor Ignition switch ON 4.5 to 5.5 V
    Ignition switch off Below 1 V
    E28-32 (TSP) - E28-14 (GND)*1, *2 P - BR Front passenger side cooler (solar sensor) thermistor signal

    • Ignition switch ON

    • Cooler (solar sensor) thermistor subjected to electric light

    		 0.8 to 4.3 V

    • Ignition switch ON

    • Cooler (solar sensor) thermistor covered with a cloth

    		 Below 0.8 V
    E28-33 (TSD) - E28-14 (GND)*1, *2 L - BR Driver side cooler (solar sensor) thermistor signal

    • Ignition switch ON

    • Cooler (solar sensor) thermistor subjected to electric light

    		 0.8 to 4.3 V

    • Ignition switch ON

    • Cooler (solar sensor) thermistor covered with a cloth

    		 Below 0.8 V
    E28-33 (TSD) - E28-14 (GND)*1, *3 L - BR Cooler (solar sensor) thermistor signal

    • Ignition switch ON

    • Cooler (solar sensor) thermistor subjected to electric light

    		 0.8 to 4.3 V

    • Ignition switch ON

    • Cooler (solar sensor) thermistor covered with a cloth

    		 Below 0.8 V
    E28-34 (SG-1) - Body ground*1 V - Body ground Ground for cooler (room temp. sensor) thermistor Always Below 1 V
    E28-37 (LIN1) - E28-14 (GND) SB - BR LIN communication signal Ignition switch ON Pulse generation
    E28-39 (PTC3) - E28-14 (GND)*4 P - BR Quick heater assembly operation signal

    • Engine running

    • Temperature settings: MAX HOT

    • Ambient temperature: 10 °C or lower

    • Engine coolant temperature: 70 °C or lower

    • Light control switch assembly off

    • Blower switch: On

    		 Below 1 V

    • Engine running

    • Temperature settings: MAX HOT

    • Ambient temperature: 10 °C or lower

    • Engine coolant temperature: 70 °C or lower

    • Light control switch assembly on

    • Blower switch: Off

    		 11 to 14 V
    E28-40 (PTC1) - E28-14 (GND)*4 W - BR Quick heater assembly operation signal

    • Engine running

    • Temperature settings: MAX HOT

    • Ambient temperature: 10 °C or lower

    • Engine coolant temperature: 75 °C or lower

    • Light control switch assembly off

    • Blower switch: On

    		 Below 1 V

    • Engine running

    • Temperature settings: MAX HOT

    • Ambient temperature: 10 °C or lower

    • Engine coolant temperature: 75 °C or lower

    • Light control switch assembly on

    • Blower switch: Off

    		 11 to 14 V
    z3-2 (BUS G) - Body ground B - Body ground Ground for BUS IC Always Below 1 V
    z3-3 (BUS) - z3-2 (BUS G) L - B BUS IC control signal Ignition switch ON Pulse generation
    z3-4 (B BUS) - z3-2 (BUS G) R - B Power supply for BUS IC Always 11 to 14 V
    z3-5 (SGA) - Body ground*1 G - Body ground Ground for No. 1 cooler thermistor Always Below 1 V
    z3-6 (TEA) - z3-5 (SGA)*1 G - G No. 1 cooler thermistor signal

    • Ignition switch ON

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

    		 1.7 to 2.1 V

    • Ignition switch ON

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

    		 0.9 to 1.3 V

    • *1: w/ Cooler System

    • *2: for Dual Type

    • *3: for Single Type

    • *4: w/ PTC Heater


    1. A01M22HN07

      Waveform 1:

      Item Content
      Terminal No. E28-2 (SOL+) - E28-14 (GND)
      Tool Setting 5 V/DIV., 500 μs./DIV.
      Vehicle Condition

      • Engine running

      • A/C switch: On

      • Blower switch: LO
    2. A01M1NPN21

      Waveform 2:

      Item Content
      Terminal No. E28-22 (BLW) - E28-14 (GND)
      Tool Setting 1 V/DIV., 500 μs./DIV.
      Vehicle Condition

      • Ignition switch ON

      • Blower switch: LO

  2. AIR CONDITIONING CONTROL ASSEMBLY (for Sedan)

    A01LYLON11

    Tech Tips

    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
    E71-1 (ILL-) - Body ground W-B - Body ground Illumination signal Always Below 1 V
    E71-4 (ILL+) - Body ground LG - Body ground Illumination signal Light control switch off Below 1 V
    Light control switch in tail or head position 11 to 14 V
    E71-5 (GND) - Body ground W-B - Body ground Ground for air conditioning control assembly Always Below 1 V
    E71-6 (LIN1) - Body ground SB - Body ground LIN communication signal Ignition switch ON Pulse generation
    E71-8 (IG+) - E71-5 (GND) B - W-B Power source (IG) Ignition switch off Below 1 V
    Ignition switch ON 11 to 14 V

  3. AIR CONDITIONING CONTROL ASSEMBLY (for Hatchback, Wagon)

    A01LYLON16

    Tech Tips

    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
    E130-1 (GND) - Body ground W-B - Body ground Ground for air conditioning control assembly Always Below 1 V
    E130-4 (ILL+) - Body ground LG - Body ground Illumination signal Light control switch off Below 1 V
    Light control switch in tail or head position 11 to 14 V
    E130-5 (ILL-) - Body ground W-B - Body ground Illumination signal Always Below 1 V
    E130-6 (LIN1) - Body ground SB - Body ground LIN communication signal Ignition switch ON Pulse generation
    E130-8 (IG+) - E130-1 (GND) B - W-B Power source (IG) Ignition switch off Below 1 V
    Ignition switch ON 11 to 14 V