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

  1. AIR CONDITIONING AMPLIFIER ASSEMBLY

    E226604N12
    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

    G81-1 (IG+) - Body ground

    GR - Body ground

    Power source (IG)

    Ignition switch ON

    11 to 14 V

    G81-1 (IG+) - Body ground

    GR - Body ground

    Power source (IG)

    Ignition switch off

    Below 1 V

    G81-2 (SOL+) - Body ground

    BR - Body ground

    Compressor solenoid operation signal

    Engine running

    A/C switch on

    Blower switch LO

    Pulse generation

    (See waveform 1)

    G81-3 (PTC2) - Body ground*1

    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

    G81-3 (PTC2) - Body ground*1

    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

    G81-8 (LOCK) - Body ground*3

    W - Body ground

    Air conditioning lock sensor signal

    Engine running

    Blower switch LO

    A/C switch on

    Pulse generation

    (See waveform 2)

    G81-9 (PRE) - G81-13 (SG-2)

    BE - G

    Air conditioner pressure sensor signal

    Engine running

    Air conditioning system operating

    Refrigerant pressure: Abnormal pressure (higher than 3025 kPa [30.8 kgf/cm2, 439 psi])

    4.73 V or higher

    G81-9 (PRE) - G81-13 (SG-2)

    BE - G

    Air conditioner pressure sensor signal

    Engine running

    Air conditioning system operating

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

    Below 0.62 V

    G81-9 (PRE) - G81-13 (SG-2)

    BE - G

    Air conditioner pressure sensor signal

    Engine running

    Air conditioning system operating

    Refrigerant pressure: Normal pressure (below 3025 kPa [30.8 kgf/cm2, 439 psi] and higher than 176 kPa [1.8 kgf/cm2, 26 psi])

    0.62 to 4.73 V

    G81-10 (S5-3) - G81-13 (SG-2)

    B - G

    Power supply for air conditioner pressure sensor

    Ignition switch ON

    A/C switch on

    4.75 to 5.25 V

    G81-10 (S5-3) - G81-13 (SG-2)

    B - G

    Power supply for air conditioner pressure sensor

    Ignition switch ON

    A/C switch off

    Below 1 V

    G81-11 (CANH)

    B

    CAN communication line

    -

    -

    G81-12 (CANL)

    W

    CAN communication line

    -

    -

    G81-13 (SG-2) - Body ground

    G - Body ground

    Ground for air conditioner pressure sensor, ambient temperature sensor, air conditioning lock sensor

    Always

    Below 1 V

    G81-14 (GND) - Body ground

    W-B - Body ground

    Ground for main power supply

    Always

    Below 1 Ω

    G81-20 (MGC) - Body ground*3

    V - Body ground

    Magnet clutch operation signal

    Engine running

    Blower switch LO

    A/C switch off

    11 to 14 V

    G81-20 (MGC) - Body ground*3

    V - Body ground

    Magnet clutch operation signal

    Engine running

    Blower switch LO

    A/C switch on

    Below 1 V

    G81-21 (B) - Body ground

    GR - Body ground

    Power source (Back-up)

    Always

    11 to 14 V

    G81-22 (BLW) - Body ground

    R - Body ground

    Blower motor speed control signal

    Ignition switch ON

    Blower switch LO

    Pulse generation

    (See waveform 3)

    G81-24 (ECOS) - Body ground*2

    R - Body ground

    Combination switch assembly (ECO mode switch) signal

    Ignition switch ON

    Combination switch assembly (ECO mode switch) on

    Below 1 V

    G81-24 (ECOS) - Body ground*2

    R - Body ground

    Combination switch assembly (ECO mode switch) signal

    Ignition switch ON

    Combination switch assembly (ECO mode switch) off

    11 to 14 V

    G81-29 (TR) - G81-34 (SG-1)

    GR - V

    Room temperature sensor signal

    Ignition switch ON

    Cabin temperature: 25°C (77°F)

    1.8 to 2.2 V

    G81-29 (TR) - G81-34 (SG-1)

    GR - V

    Room temperature sensor signal

    Ignition switch ON

    Cabin temperature: 40°C (104°F)

    1.2 to 1.6 V

    G81-32 (TSP) - Body ground

    P - Body ground

    Solar sensor signal (for Front passenger side)

    Ignition switch ON

    Solar sensor subjected to electric light

    0.8 to 4.3 V

    G81-32 (TSP) - Body ground

    P - Body ground

    Solar sensor signal (for Front passenger side)

    Ignition switch ON

    Solar sensor covered with a cloth

    Below 0.8 V

    G81-33 (TSD) - Body ground

    L - Body ground

    Solar sensor signal (for Driver side)

    Ignition switch ON

    Solar sensor subjected to electric light

    0.8 to 4.3 V

    G81-33 (TSD) - Body ground

    L - Body ground

    Solar sensor signal (for Driver side)

    Ignition switch ON

    Solar sensor covered with a cloth

    Below 0.8 V

    G81-34 (SG-1) - Body ground

    V - Body ground

    Ground for room temperature sensor

    Always

    Below 1 V

    G81-37 (LIN1) - Body ground

    B - Body ground

    LIN communication signal

    Ignition switch ON

    Pulse generation

    G81-39 (PTC3) - Body ground*1

    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

    G81-39 (PTC3) - Body ground*1

    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

    G81-40 (PTC1) - Body ground*1

    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

    G81-40 (PTC1) - Body ground*1

    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

    z7-2 (BUS G) - Body ground

    -

    Ground for BUS IC

    Always

    Below 1 V

    z7-3 (BUS) - z7-2 (BUS G)

    -

    BUS IC control signal

    Ignition switch ON

    Pulse generation

    z7-4 (B BUS) - z7-2 (BUS G)

    -

    Power supply for BUS IC

    Always

    11 to 14 V

    z7-5 (SGA) - Body ground

    -

    Ground for evaporator temperature sensor

    Always

    Below 1 V

    z7-6 (TEA) - z7-5 (SGA)

    -

    Evaporator temperature sensor signal

    Ignition switch ON

    Evaporator temperature: 0°C (32°F)

    1.7 to 2.1 V

    z7-6 (TEA) - z7-5 (SGA)

    -

    Evaporator temperature sensor signal

    Ignition switch ON

    Evaporator temperature: 15°C (59°F)

    0.9 to 1.3 V

    *1: w/ PTC Heater

    *2: w/ Stop and Start System

    *3: w/ Magnet Clutch

    1. E106664N02

      Waveform 1:

      Item

      Content

      Terminal No.

      G81-2 (SOL+) - Body ground

      Tool Setting

      5 V/DIV., 500 μs/DIV.

      Vehicle Condition

      Engine running

      A/C switch on

      Blower switch LO
    2. E116941N04

      Waveform 2:

      Item

      Content

      Terminal No.

      G81-8 (LOCK) - G81-13 (SG-2)

      Tool Setting

      200 mV/DIV., 10 ms./DIV.

      Vehicle Condition

      Engine running

      Blower switch LO

      A/C switch on
    3. E103396N16

      Waveform 3:

      Item

      Content

      Terminal No.

      G81-22 (BLW) - Body ground

      Tool Setting

      1 V/DIV., 500 μs/DIV.

      Vehicle Condition

      Ignition switch ON

      Blower switch LO

  2. AIR CONDITIONING CONTROL ASSEMBLY

    E270613N01
    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

    G20-1 (ILL-) - Body ground

    BR - Body ground

    Illumination signal

    Light control switch off

    Below 1 V

    G20-1 (ILL-) - Body ground

    BR - Body ground

    Illumination signal

    Light control switch tail or head position

    Below 1 V

    G20-4 (ILL+) - Body ground

    V - Body ground

    Illumination signal

    Light control switch off

    Below 1 V

    G20-4 (ILL+) - Body ground

    V - Body ground

    Illumination signal

    Light control switch tail or head position

    11 to 14 V

    G20-5 (GND) - Body ground

    BR - Body ground

    Ground for air conditioning control assembly

    Always

    Below 1 Ω

    G20-6 (LIN1) - Body ground

    B - Body ground

    LIN communication signal

    Ignition switch ON

    Pulse generation

    G20-8 (IG+) - Body ground

    BE - Body ground

    Power source (IG)

    Ignition switch ON

    11 to 14 V

    G20-8 (IG+) - Body ground

    BE - Body ground

    Power source (IG)

    Ignition switch off

    Below 1 V