AIR CONDITIONING SYSTEM (for 1KR-FE) TERMINALS OF ECU


  1. AIR CONDITIONER AMPLIFIER ASSEMBLY

    A0138NEE03
    Terminal No. (Symbol) Wiring Color Terminal Description Condition Specification
    C14-1 (PRS) - C14-2 (E) Y - W-B Pressure switch signal

    While engine idling

    Blower switch: LO

    A/C switch: OFF to ON.

    Refrigerant pressure in normal operating range: 196 kPa (2.0 kgf/cm2, 28 psi) to 3140 kPa (32.0 kgf/cm2, 455 psi)*

    		 Below 1 V →11 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

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

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

  2. ECM

    A0136GTE09
    Terminal No. (Symbol) Wiring Color Terminal Description Condition Specification
    B26-33 (MGC) - B26-1 (E1) BR - W-B Magnetic clutch relay signal

    While engine idling

    Blower switch: LO

    A/C switch: OFF to ON

    		 Below 1 V →11 to 14 V
    B25-26 (AC1) - B26-1 (E1) G - W-B A/C amplifier signal

    While engine idling

    Blower switch: LO

    A/C switch: OFF to ON

    		 Below 1 V →11 to 14 V
    B26-34 (FAN) - B26-1 (E1) W - W-B Cooling fan signal

    While engine idling

    Blower switch: LO

    A/C switch: ON

    		 11 to 14 V
    B26-1 (E1) - Body ground W-B - Body ground Ground for power supply Always Below 1 Ω

    Tech Tips

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