AIR CONDITIONING SYSTEM TERMINALS OF ECU


  1. A/C AMPLIFIER

    A01EJWFE22

    Tech Tips

    Check from the rear of the connector while it is connected to the A/C amplifier.

    Terminal No.

    (Symbol)

    		 Wiring Color Terminal Description Condition Specified Condition
    D47-1 (IG+) - D47-14 (GND) Y - W Power source (IG) Ignition switch ON 11 to 14 V
    D47-1 (IG+) - D47-14 (GND) Y - W Power source (IG) Ignition switch off Below 1 V
    D47-2 (SOL+) - D47-14 (GND) L - W A/C compressor solenoid operation signal

    • Engine running

    • A/C switch: On

    • Blower switch: LO

    Pulse generation

    (See waveform 1)
    D47-5 (TAM) - D47-13 (SG-2) V - L Ambient temperature sensor signal

    • Ignition switch ON

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

    		 1.35 to 1.75 V
    D47-5 (TAM) - D47-13 (SG-2) V - L Ambient temperature sensor signal

    • Ignition switch ON

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

    		 0.9 to 1.2 V
    D47-9 (PRE) - D47-13 (SG-2) R - L A/C pressure sensor signal

    • Engine running

    • A/C system operating

    • Refrigerant pressure: Abnormal pressure (more than 3140 kPa (32.0 kgf/cm2, 455 psi))

    		 4.84 V or higher
    D47-9 (PRE) - D47-13 (SG-2) R - L A/C pressure sensor signal

    • Engine running

    • A/C system operating

    • Refrigerant pressure: Abnormal pressure (less than 196 kPa (2.0 kgf/cm2, 28 psi))

    		 Below 0.73 V
    D47-9 (PRE) - D47-13 (SG-2) R - L A/C pressure sensor signal

    • Engine running

    • A/C system operating

    • Refrigerant pressure: Normal pressure (less than 3140 kPa (32.0 kgf/cm2, 455 psi) and more than 196 kPa (2.0 kgf/cm2, 28 psi))

    		 0.73 to 4.84 V
    D47-10 (S5-3) - D47-13 (SG-2) P - L Power supply for A/C pressure sensor Ignition switch ON 4.75 to 5.25 V
    D47-10 (S5-3) - D47-13 (SG-2) P - L Power supply for A/C pressure sensor Ignition switch off Below 1 V
    D47-11 (CANH) - D47-12 (CANL) P - W CAN communication system CAN communication circuit Pulse generation
    D47-13 (SG-2) - Body ground L - Body ground Ground for A/C pressure sensor, ambient temperature sensor Always Below 1 V
    D47-14 (GND) - Body ground W - Body ground Ground for main power supply Always Below 1 V
    D47-18 (D) - D47-14 (GND) G - W DEF relay signal

    • Ignition switch ON

    • REAR DEF switch: on

    		 Below 1 V
    D47-18 (D) - D47-14 (GND) G - W DEF relay signal

    • Ignition switch ON

    • REAR DEF switch: off

    		 11 to 14 V
    D47-21 (B) - D47-14 (GND) V - W Power source (Back-up) Always 11 to 14 V
    D47-23 (BLW) - D47-14 (GND) R - W Blower motor speed control signal

    • Ignition switch ON

    • Blower switch: LO

    Pulse generation

    (See waveform 2)
    D47-29 (TR) - D47-34 (SG-1) LG - V Room temperature sensor signal

    • Ignition switch ON

    • Cabin temperature: 25°C (77°F)

    		 1.8 to 2.2 V
    D47-29 (TR) - D47-34 (SG-1) LG - V Room temperature sensor signal

    • Ignition switch ON

    • Cabin temperature: 40°C (104°F)

    		 1.2 to 1.6 V
    D47-32 (TSP) - D47-14 (GND) LG - W Solar sensor signal (for front passenger side)

    • Ignition switch ON

    • Solar sensor subjected to electric light

    		 0.8 to 4.3 V
    D47-32 (TSP) - D47-14 (GND) LG - W Solar sensor signal (for front passenger side)

    • Ignition switch ON

    • Solar sensor covered with a cloth

    		 Below 0.8 V
    D47-33 (TSD) - D47-14 (GND) P - W Solar sensor signal (for driver side)

    • Ignition switch ON

    • Solar sensor subjected to electric light

    		 0.8 to 4.3 V
    D47-33 (TSD) - D47-14 (GND) P - W Solar sensor signal (for driver side)

    • Ignition switch ON

    • Solar sensor covered with a cloth

    		 Below 0.8 V
    D47-34 (SG-1) - Body ground V - Body ground Ground for room temperature sensor Always Below 1 V
    D47-37 (LIN1) - D47-14 (GND) SB - W LIN communication signal Ignition switch ON Pulse generation
    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. A01EJE3E02

      Waveform 1:

      Item Content
      Terminal No. D47-2 (SOL+) - D47-14 (GND)
      Tool Setting 5 V/DIV., 500 μs/DIV.
      Vehicle Condition

      • Engine running

      • A/C switch: On

      • Blower switch: LO
    2. A01EK8CE01

      Waveform 2:

      Item Content
      Terminal No. D47-23 (BLW) - D47-14 (GND)
      Tool Setting 1 V/DIV., 500 μs/DIV.
      Vehicle Condition

      • Ignition switch ON

      • Blower switch: LO

  2. AIR CONDITIONING CONTROL ASSEMBLY

    A01EKG7E04

    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
    E3-1 (ILL-) - E3-3 (ILL+) L - BR Light control switch signal Light control switch: OFF Below 1 V
    E3-1 (ILL-) - E3-3 (ILL+) L - BR Light control switch signal Light control switch: TAIL 11 to 14 V
    E3-2 (LIN1) - E3-5 (GND) SB - W LIN communication signal Ignition switch ON Pulse generation
    E3-4 (IG+) - E3-5 (GND) GR - W Power source (IG) Ignition switch off Below 1 V
    E3-4 (IG+) - E3-5 (GND) GR - W Power source (IG) Ignition switch ON 11 to 14 V
    E3-5 (GND) - Body ground W - Body ground Ground for front air conditioning control assembly Always Below 1 V