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

  1. AIR CONDITIONING AMPLIFIER ASSEMBLY

    E226604N13
    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

    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. E106664N07

      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. E103396N21

      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)

    E167351N11
    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

    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)

    E167351N16
    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

    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