AIR CONDITIONING SYSTEM TERMINALS OF ECU


  1. AIR CONDITIONING AMPLIFIER ASSEMBLY

    B006MIKN11

    1. Disconnect the G36 and G38 air conditioning amplifier assembly connectors.

    2. Measure the resistance and voltage according to the value(s) in the table below.

      Terminal No.

      (Symbol)

      		 Wiring Color Terminal Description Condition Specified Condition
      G36-1 (IG+) - Body ground V - Body ground Power source (IG) Engine switch on (IG) 11 to 14 V
      Engine switch off Below 1 V
      G36-14 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
      G36-21 (B) - Body ground P - Body ground Power source (Back-up) Always 11 to 14 V
      G38-24 (GND2) - Body ground BR - Body ground Ground Always Below 1 Ω
      G38-28 (+B2) - Body ground SB - Body ground Power source (Back-up) Always 11 to 14 V

    3. Reconnect the G36 and G38 air conditioning amplifier assembly connectors.

    4. Measure the resistance and voltage, and check for waveform according to the value(s) in the table below.

      Terminal No.

      (Symbol)

      		 Wiring Color Terminal Description Condition Specified Condition
      G36-2 (SOL+) - Body ground R - Body ground Compressor solenoid operation signal

      • Engine running

      • "A/C" switch on

      • Blower switch: LO

      Pulse generation

      (See waveform 1)
      G36-3 (PTC2) - Body ground*1 LG - Body ground Quick heater assembly operation signal

      • Engine starts

      • Combination switch assembly (ECO mode switch) off

      • Temperature settings: MAX HOT

      • Ambient temperature: 10°C (50°F) or lower

      • Engine coolant temperature: 64°C (147°F) or lower

      • Light control switch off

      • Blower switch: off → on (after 20 seconds)

      		 11 to 14 V → Below 1 V
      G36-4 (ECON) - Body ground SB - Body ground Combination switch assembly (ECO mode switch) signal

      • Engine switch on (IG)

      • Combination switch assembly (ECO mode switch) on

      		 Below 1 V

      • Engine switch on (IG)

      • Combination switch assembly (ECO mode switch) off

      		 11 to 14 V
      G36-5 (TAM) - G36-13 (SG-2) P - B Ambient temperature sensor signal

      • Engine switch on (IG) (do not start the engine and electric motor)

      • Ambient temperature: 10°C (50°F)

      		 1.8 to 2.4 V

      • Engine switch on (IG) (do not start the engine and electric motor)

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

      		 1.65 to 2.15 V

      • Engine switch on (IG) (do not start the engine and electric motor)

      • Ambient temperature: 20°C (68°F)

      		 1.5 to 1.95 V

      • Engine switch on (IG) (do not start the engine and electric motor)

      • Ambient temperature: 25°C (77°F)

      		 1.35 to 1.75 V

      • Engine switch on (IG) (do not start the engine and electric motor)

      • Ambient temperature: 30°C (86°F)

      		 1.2 to 1.55 V

      • Engine switch on (IG) (do not start the engine and electric motor)

      • Ambient temperature: 35°C (95°F)

      		 1.0 to 1.4 V

      • Engine switch on (IG) (do not start the engine and electric motor)

      • Ambient temperature: 40°C (104°F)

      		 0.85 to 1.25 V

      • Engine switch on (IG) (do not start the engine and electric motor)

      • Ambient temperature: 45°C (113°F)

      		 0.75 to 1.10 V

      • Engine switch on (IG) (do not start the engine and electric motor)

      • Ambient temperature: 50°C (122°F)

      		 0.65 to 1.0 V
      G36-8 (LOCK) - Body ground*2 G - Body ground Compressor with pulley assembly signal

      • Engine running

      • "A/C" switch on

      • Blower switch: LO

      Pulse generation

      (See waveform 4)
      G36-9 (PRE) - G36-13 (SG-2) SB - B 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

      • Engine running

      • Air conditioning system operating

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

      		 Below 0.62 V

      Engine running


      • 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
      G36-10 (S5-3) - Body ground GR - Body ground Power source of air conditioner pressure sensor, ambient temperature sensor, air conditioning lock sensor*2 Engine switch on (IG) 4.75 to 5.25 V
      G36-11 (CANH) BE CAN communication line - -
      G36-12 (CANL) W CAN communication line - -
      G36-13 (SG-2) - Body ground B - Body ground Ground for ambient temperature sensor signal Always Below 1 Ω
      G36-15 (NANO) - Body ground*3 G - Body ground No. 1 ion generator sub-assembly operation signal

      • Engine switch on (IG)

      • Blower switch: LO

      		 Below 1 V

      • Engine switch on (IG)

      • Blower switch: off

      		 11 to 14 V
      G36-16 (RNNO) - Body ground*3 GR - Body ground No. 2 ion generator sub-assembly operation signal

      • Engine switch on (IG)

      • Blower switch: LO

      		 Below 1 V

      • Engine switch on (IG)

      • Blower switch: off

      		 11 to 14 V
      G36-20 (MGC) - Body ground*2 G - Body ground Magnet clutch relay signal

      • Engine running

      • "A/C" switch off → on

      • Blower switch: LO

      • Magnet clutch assembly off → on

      		 11 to 14 V → Below 1 V
      G36-22 (BLW) - Body ground Y - Body ground Blower motor speed control signal

      • Engine switch on (IG)

      • Blower switch: LO

      Pulse generation

      (See waveform 2)
      G36-25 (RNIN) - Body ground*3 R - Body ground No. 2 ion generator sub-assembly condition signal

      • Engine switch on (IG)

      • Blower switch: LO

      		 Below 1 V

      • Engine switch on (IG)

      • Blower switch: off

      		 4.75 to 5.25 V
      G36-26 (NAIN) - Body ground*3 LG - Body ground No. 1 ion generator sub-assembly condition signal

      • Engine switch on (IG)

      • Blower switch: LO

      		 Below 1 V

      • Engine switch on (IG)

      • Blower switch: off

      		 4.75 to 5.25 V
      G36-29 (TR) - G36-34 (SG-4) B - LG Room temperature sensor signal

      • Engine switch on (IG)

      • Cabin temperature: 25°C (77°F)

      		 1.8 to 2.2 V

      • Engine switch on (IG)

      • Cabin temperature: 40°C (104°F)

      		 1.2 to 1.6 V
      G36-34 (SG-4) - Body ground LG - Body ground Ground for room temperature sensor Always Below 1 Ω
      G36-35 (SG-5) - Body ground V - Body ground Ground for smog ventilation sensor Always Below 1 Ω
      G36-36 (PTC3) - Body ground*1 Y - Body ground Quick heater assembly operation signal

      • Engine starts

      • Combination switch assembly (ECO mode switch) off

      • Temperature settings: MAX HOT

      • Ambient temperature: 10°C (50°F) or lower

      • Engine coolant temperature: 64°C (147°F) or lower

      • Light control switch off

      • Blower switch: off → on (after 30 seconds)

      		 11 to 14 V → Below 1 V
      G36-37 (LIN1) - Body ground BE - Body ground LIN communication signal Engine switch on (IG) Pulse generation
      G36-40 (PTC1) - Body ground*1 R - Body ground Quick heater assembly operation signal

      • Engine starts

      • Combination switch assembly (ECO mode switch) off

      • Temperature settings: MAX HOT

      • Ambient temperature: 10°C (50°F) or lower

      • Engine coolant temperature: 60°C (140°F) or lower

      • Light control switch off

      • Blower switch: off → on (after 10 seconds)

      		 11 to 14 V → Below 1 V
      G38-1 (RBUS) - G38-25 (RBUG) B - GR BUS IC control signal Engine switch on (IG)

      Pulse generation

      (See waveform 5)
      G38-3 (DGS) - G36-35 (SG-5)*4 W - V Smog ventilation sensor signal (HC, CO) After 28 seconds from engine switch on (IG) and sensor exposed to exhaust gas (HC, CO) 1.0 to 4.5 V
      G38-4 (DGS1) - G36-35 (SG-5)*4 BE - V Smog ventilation sensor signal (NOx) After 120 seconds from engine switch on (IG) and sensor exposed to exhaust gas (NOx) 1.0 to 4.5 V
      G38-5 (TEC) - G38-23 (SGND) V - LG Rear evaporator temperature sensor signal

      • Engine switch on (IG)

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

      		 2.0 to 2.4 V

      • Engine switch on (IG)

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

      		 1.4 to 1.8 V
      G38-7 (SG-6) - Body ground L - Body ground Ground for No. 2 room temperature sensor Always Below 1 Ω
      G38-16 (RLIN) - Body ground L - Body ground LIN communication signal Engine switch on (IG) Pulse generation
      G38-20 (TR) - G38-7 (SG-6) P - L No. 2 room temperature sensor signal

      • Engine switch on (IG)

      • Cabin temperature: 25°C (77°F)

      		 1.8 to 2.2 V

      • Engine switch on (IG)

      • Cabin temperature: 40°C (104°F)

      		 1.2 to 1.6 V
      G38-23 (SGND) - Body ground LG - Body ground Ground for rear evaporator temperature sensor Always Below 1 Ω
      G38-25 (RBUG) - Body ground GR - Body ground Ground for BUS IC Always Below 1 Ω
      G38-26 (BLWH) - Body ground Y - Body ground Rear blower motor speed control signal

      • Engine switch on (IG)

      • Blower switch: LO

      Pulse generation

      (See waveform 3)
      G38-27 (RBBU) - G38-25 (RBUG) R - GR Power supply for BUS IC Always 11 to 14 V
      z1-2 (BUSG) - Body ground - Ground for BUS IC Always Below 1 Ω
      z1-3 (BUS) - z1-2 (BUSG) - BUS IC control signal Engine switch on (IG)

      Pulse generation

      (See waveform 5)
      z1-4 (BBUS) - z1-2 (BUSG) - Power supply for BUS IC Always 11 to 14 V
      z1-5 (SG-3) - Body ground - Ground for evaporator temperature sensor Always Below 1 Ω
      z1-6 (TE) - z1-5 (SG-3) - Evaporator temperature sensor signal

      • Engine switch on (IG)

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

      		 1.7 to 2.1 V

      • Engine switch on (IG)

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

      		 0.9 to 1.3 V

      • *1: w/ PTC Heater

      • *2: for 2GR-FE

      • *3: w/ Ion Generator

      • *4: w/ Automatic Recirculation/fresh Function

    5. B006MAHN02

      Waveform 1:

      Item Content
      Terminal No. G36-2 (SOL+) - Body ground
      Tool Setting 5 V/DIV., 500 μs/DIV.
      Vehicle Condition

      • Engine running

      • "A/C" switch on

      • Blower switch: LO
    6. B006OLPN16

      Waveform 2:

      Item Content
      Terminal No. G36-22 (BLW) - Body ground
      Tool Setting 1 V/DIV., 500 μs/DIV.
      Vehicle Condition

      • Engine switch on (IG)

      • Blower switch: LO
    7. B006NMXN01

      Waveform 3:

      Item Content
      Terminal No. G38-26 (BLWH) - Body ground
      Tool Setting 2 V/DIV., 500 μs/DIV.
      Vehicle Condition

      • Engine switch on (IG)

      • Blower switch: LO
    8. B006P96N01

      Waveform 4:

      Item Content
      Terminal No. G36-8 (LOCK) - Body ground
      Tool Setting 200 mV/DIV., 10 ms./DIV.
      Vehicle Condition

      • Engine running

      • "A/C" switch on

      • Blower switch: LO
    9. B006P38N03

      Waveform 5:

      Item Content
      Terminal No.

      z1-3 (BUS) - z1-2 (BUSG)

      G38-1 (RBUS) - G38-25 (RBUG)
      Tool Setting 2 V/DIV., 2 ms./DIV.
      Vehicle Condition Engine switch on (IG)

  2. AIR CONDITIONING CONTROL ASSEMBLY


    1. B006PR8N02

      Disconnect the G30 air conditioning control assembly connector.

    2. Measure the resistance and voltage, and check for waveform according to the value(s) in the table below.

      Terminal No.

      (Symbol)

      		 Wiring Color Terminal Description Condition Specified Condition
      G30-3 (LIN1) - Body ground BE - Body ground LIN communication signal Engine switch on (IG) Pulse generation
      G30-4 (GND) - Body ground BR - Body ground Ground Always Below 1 Ω
      G30-5 (IG+) - Body ground

      P - Body ground*1

      B - Body ground*2

      		 Power source (IG) Engine switch on (IG)

      11 to 14 V*1

      10.5 to 16 V*2
      Engine switch off Below 1 V

      • *1: w/o Stop and Start System

      • *2: w/ Stop and Start System

  3. INTEGRATION CONTROL AND PANEL ASSEMBLY


    1. B006KWNN05

      Disconnect the S8 integration control and panel assembly connector.

    2. Measure the resistance and voltage, and check for waveform according to the value(s) in the table below.

      Terminal No.

      (Symbol)

      		 Wiring Color Terminal Description Condition Specified Condition
      S8-5 (RLIN) - Body ground Y - Body ground LIN communication signal Engine switch on (IG) Pulse generation
      S8-7 (IG) - Body ground W - Body ground Power source (IG) Engine switch on (IG)

      11 to 14 V*1

      9.5 to 14 V*2
      Engine switch off Below 1 V
      S8-12 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω

      • *1: w/o Stop and Start System

      • *2: w/ Stop and Start System