AIR CONDITIONING SYSTEM TERMINALS OF ECU


  1. AIR CONDITIONING AMPLIFIER ASSEMBLY

    Figure 1. for 4 Zone Type:

    B006BDBN03

    Figure 2. for Dual Type:

    B006BZYN07

    1. Disconnect the G63 and G65 air conditioning amplifier assembly connectors.

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

      Terminal No.

      (Symbol)

      		 Wiring Color Terminal Description Condition Specified Condition
      G63-4 (+B2) - Body ground LA-B - Body ground Power source (Back-up) Always 11 to 14 V
      G65-1 (+B1) - Body ground LA-W - Body ground Power source (Back-up) Always 11 to 14 V
      G65-2 (IG+) - Body ground LA-R - Body ground Power source (IG) Engine switch on (IG) 11 to 14 V
      Engine switch off Below 1 V
      G65-4 (GND) - Body ground LA - Body ground Ground Always Below 1 Ω

    3. Reconnect the G63 and G65 air conditioning amplifier assembly connectors.

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

      Terminal No.

      (Symbol)

      		 Wiring Color Terminal Description Condition Specified Condition
      G65-3 (SOL+) - Body ground LA-P - Body ground Compressor solenoid operation signal

      • Engine running

      • Blower switch: LO

      • A/C switch: On

      Pulse generation

      (See waveform 5)
      G65-6 (BLW) - Body ground R - Body ground Blower motor speed control signal

      • Engine switch on (IG)

      • Blower switch: LO

      Pulse generation

      (See waveform 1)
      G65-7 (NANO) - Body ground V - Body ground Ion generator operation signal

      • Engine switch on (IG)

      • Blower switch: Off → LO

      		 4.75 to 5.25 V → Below 1 V
      G65-11 (CANH) L CAN communication line - -
      G65-12 (CANL) W CAN communication line - -
      G65-14 (LIN1) - Body ground B - Body ground LIN communication signal Engine switch on (IG)

      Pulse generation

      (See waveform 2)
      G65-16 (LIN3) - Body ground P - Body ground LIN communication signal Engine switch on (IG)

      Pulse generation

      (See waveform 2)
      G65-26 (NAIN) - Body ground W - Body ground Ion generator operation condition signal

      • Engine switch on (IG)

      • Blower switch: Off → LO

      		 4.75 to 5.25 V → Below 2.2 V
      G64-1 (SG-1) - Body ground G - Body ground Ground for sensor Always Below 1 Ω
      G64-2 (SG-2) - Body ground SB - Body ground Ground for sensor Always Below 1 Ω
      G64-5 (S5-4) - Body ground GR - Body ground Power source of sensor Engine switch off → on (IG) Below 1 V → 4.75 to 5.25 V
      G64-6 (S5-3) - Body ground V - Body ground Power source of sensor Engine switch off → on (IG) Below 1 V → 4.75 to 5.25 V
      G64-9 (MGC) - Body ground*4 R - Body ground Magnetic clutch operation signal

      • Engine running

      • Blower switch: LO

      • A/C switch: Off or on (magnet clutch off)

      		 11 to 14 V

      • Engine running

      • Blower switch: LO

      • A/C switch: On (magnet clutch on)

      		 Below 1 V
      G64-13 (TAM) - G64-2 (SG-2) B - SB 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
      G64-14 (TR) - Body ground P - Body ground 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
      G64-20 (ECOS) - Body ground W - Body ground Satellite switch set (ECO drive mode) signal

      • Engine switch on (IG)

      • Satellite switch set (ECO drive mode) off → on

      		 11 to 14 V → Below 1 V
      G64-21 (LOCK) - Body ground*4 G - Body ground A/C lock sensor signal

      • Engine running

      • Blower switch: LO

      • A/C switch: On

      Pulse generation

      (See waveform 4)
      G64-22 (RRTS) - G64-5 (S5-4) L - GR Cooler thermistor (solar sensor) signal Sensor is subjected to electric light 0.8 to 4.3 V
      Sensor is covered with a cloth Below 0.8 V
      G64-24 (PRE) - G63-20 (SG-7) P - 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*1
      G64-25 (DGS) - G64-2 (SG-2) R - SB Smog ventilation sensor signal (HC, CO)

      • Engine switch on (IG)

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

      • Humidity: 65%

      • Spray with clean air

      		 5 to 80 kΩ
      G64-27 (DGS 1) - G64-2 (SG-2) G - SB Smog ventilation sensor signal (NOx)

      • Engine switch on (IG)

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

      • Humidity: 65%

      • Spray with clean air

      		 1.25 to 80 kΩ
      G63-1 (RGND) - Body ground LA - Body ground Ground Always Below 1 Ω
      R63-2 (RBUG) - Body ground LA-L - Body ground Ground for BUS IC Always Below 1 Ω
      G63-3 (RBBU) - R63-2 (RBUG) LA-R - LA-L Power supply for BUS IC Always 11 to 14 V
      G63-12 (SBLW) - Body ground G - Body ground Rear blower motor speed control signal

      • Engine switch on (IG)

      • Blower switch: LO

      Pulse generation

      (See waveform 1)
      G63-22 (RBUS) - G63-2 (RBUG) V - LA-L BUS IC control signal Engine switch on (IG)

      Pulse generation

      (See waveform 3)
      G63-24 (RLIN) - Body ground B - Body ground LIN communication signal Engine switch on (IG)

      Pulse generation

      (See waveform 2)
      z11-1 (BUS G) - Body ground*2 - Ground for BUS IC Always Below 1 Ω
      z11-2 (BUS) - z11-1 (BUS G)*2 - BUS IC control signal Engine switch on (IG)

      Pulse generation

      (See waveform 3)
      z11-3 (B BUS) - z11-1 (BUS G)*2 - Power supply for BUS IC Engine switch off 11 to 14 V
      z11-12 (SGA) - Body ground*2 - Ground for No. 1 cooler thermistor Always Below 1 Ω
      z11-7 (BUS G) - Body ground*2 - Ground for BUS IC Always Below 1 Ω
      z11-8 (BUS) - z11-7 (BUS G)*2 - BUS IC control signal Engine switch on (IG)

      Pulse generation

      (See waveform 3)
      z11-9 (B BUS) - z11-7 (BUS G)*2 - Power supply for BUS IC Always 11 to 14 V
      z11-11 (TEA) - z11-12 (SGA)*2 - No. 1 cooler thermistor 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
      z22-2 (BUS G) - Body ground*3 - Ground for BUS IC Always Below 1 Ω
      z22-3 (BUS) - z22-2 (BUS G)*3 - BUS IC control signal Engine switch on (IG)

      Pulse generation

      (See waveform 3)
      z22-4 (B BUS) - z22-2 (BUS G)*3 - Power supply for BUS IC Always 11 to 14 V
      z22-5 (SGA) - Body ground*3 - Ground for No. 1 cooler thermistor Always Below 1 Ω
      z22-6 (TEA) - z22-5 (SGA)*3 - No. 1 cooler thermistor 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: While sensor voltage is 5 V

      • *2: for 4 Zone Type

      • *3: for Dual Type

      • *4: for 8GR-FKS

    5. B006AIPE01

      Waveform 1:

      Item Content
      Terminal No.

      G65-6 (BLW) - Body ground

      G63-12 (SBLW) - Body ground
      Tool Setting 1 V/DIV., 500 μs./DIV.
      Vehicle Condition

      • Engine switch on (IG)

      • Blower switch: LO
    6. B006BXSE01

      Waveform 2:

      Item Content
      Terminal No.

      G65-14 (LIN1) - Body ground

      G65-16 (LIN3) - Body ground

      G63-24 (RLIN) - Body ground
      Tool Setting 2 V/DIV., 20 μs./DIV.
      Vehicle Condition Engine switch on (IG)
    7. B006ETXE08

      Waveform 3:

      Item Content
      Terminal No.

      z11-2 (BUS) - z11-1 (BUS G)*1

      z11-8 (BUS) - z11-7 (BUS G)*1

      G63-22 (RBUS) - G63-2 (RBUG)

      z22-3 (BUS) - z22-2 (BUS G)*2
      Tool Setting 2 V/DIV., 20 μs./DIV.
      Vehicle Condition Engine switch on (IG)

      • *1: for 4 Zone Type

      • *2: for Dual Type

    8. B006BOHN06

      Waveform 4:

      Item Content
      Terminal No. G64-21 (LOCK) - Body ground
      Tool Setting 200 mV/DIV., 10 ms./DIV.
      Vehicle Condition

      • Engine running

      • Blower switch: LO

      • A/C switch: On
    9. B006G1TN07

      Waveform 5:

      Item Content
      Terminal No. G65-3 (SOL+) - Body ground
      Tool Setting 5 V/DIV., 500 μs./DIV.
      Vehicle Condition

      • Engine running

      • Blower switch: LO

      • A/C switch: On

  2. ECM


  3. NO. 1 SEMICONDUCTOR POWER INTEGRATION ECU (w/ Heater Accessory)

    Click here

  4. NO. 2 SEMICONDUCTOR POWER INTEGRATION ECU

    Click here