AIR CONDITIONING SYSTEM (for 2WZ-TV) TERMINALS OF ECU


  1. AIR CONDITIONER AMPLIFIER ASSEMBLY

    A0138NEE01
    Terminal No. (Symbols) Wiring Color Terminal Description Condition Specification
    C14-1 (PRS) - C14-2 (E) Y - W-B A/C switch signal

    While engine idling

    Blower switch: LO

    A/C switch: OFF to ON

    		 Below 1 V →10 to 14 V
    C14-3 (AC1) - C14-2 (E) B - W-B A/C magnetic clutch signal

    Ignition switch: ON

    Magnet clutch: OFF to ON

    		 10 to 14 V →Below 1 V
    C14-2 (E) - Body ground W-B - Body ground Ground for main power supply Always Below 1 Ω

  2. ECM

    A0135WOE02
    Terminal No. (Symbols) Wiring Color Terminal Description Condition Specification
    B54-24 (MGC) - B54-12 (E2) - Magnetic clutch relay signal

    While engine idling

    Blower switch: LO

    A/C switch: OFF to ON

    		 Below 1 V →10 to 14 V
    B53-1 (AC1) - B53-38 (E1) - A/C amplifier signal

    While engine idling

    Blower switch: LO

    A/C switch: OFF to ON

    		 Below 1 V →10 to 14 V
    B53-38 (E1) - Body ground - - Body ground Ground for power supply Always Below 1 Ω
    B54-12 (E2) - Body ground - - Body ground Ground for power supply Always Below 1 Ω

    A35-30 (PDIN)*1 - A35-24 (GND)*1

    A36-30 (PDIN)*2 - A36-24 (GND)*2

    		 L - P Pressure sensor signal

    While engine idling

    Blower switch: LO

    A/C switch: OFF to ON.

    Refrigerant pressure in normal operating range: 0.176 MPa (1.8 kgf/ cm2. 26 psi) to 3.025 MPa (30.9 kgf/ cm2. 439psi)*3

    		 Below 1 V →0.76 to 4.74 V

    A35-22 (5V)*1 - A35-24 (GND)*1

    A36-22 (5V)*2 - A36-24 (GND)*2

    		 G - P Pressure sensor signal Ignition switch: ON 4.5 to 5.5 V

    *1: LHD

    *2: RHD

    *3: If refrigerant pressure is outside the normal operating range, the pressure switch signal stays below 1V even when the A/C switch is ON.

    Tech Tips

    If the outside air temperature is low, the conditions which are required to activate the compressor may not be satisfied.