Air Conditioning System (For Manual Air Conditioning System) Terminals Of Ecu

  1. CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY

Air Conditioning System (For Manual Air Conditioning System) -- Terminals Of Ecu



CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY

Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.Air Conditioning.Air Conditioning System (For Manual Air Conditioning System).Air Conditioning System (For Manual Air Conditioning System) Terminals Of Ecu

  1. Disconnect the A14 amplifier connector.

  2. Measure the voltage and resistance of the wire harness side connector.

    Symbols (Terminal No.)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    IG+ (A14-10) - GND (A14-18)
    		R-L - L
    		Power source (IG)
    		Ignition switch OFF
    		Below 1 V
    IG+ (A14-10) - GND (A14-18)
    		R-L - L
    		Power source (IG)
    		Ignition switch ON
    		10 to 14 V
    GND (A14-18) - Body ground
    		L - Body ground
    		Ground
    		Always
    		Below 1 Ω
    ACON (A14-4) - GND (A14-18)
    		R-G - L
    		A/C switch signal
    		Ignition switch START
    Blower switch ON
    A/C switch OFF
    		Below 1 V
    ACON (A14-4) - GND (A14-18)
    		R-G - L
    		A/C switch signal
    		Ignition switch START
    Blower switch ON
    A/C switch ON
    		10 to 14 V
    IND- (A14-13) - GND (A14-18)
    		R-L - L
    		A/C indicator light signal
    		Ignition switch START
    Blower switch ON
    A/C switch OFF
    		Below 1 V
    IND- (A14-13) - GND (A14-18)
    		R-L - L
    		A/C indicator light signal
    		Ignition switch START
    Blower switch ON
    A/C switch ON
    		10 to 14 V
    1. If the result is not as specified, there may be a malfunction on the wire harness side.

  3. Reconnect the A14 amplifier connector.

  4. Measure the voltage and resistance of the connector.

    Symbols (Terminal No.)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    PSW (A14-3) - GND (A14-18)
    		Y-B - L
    		A/C pressure switch signal
    		Ignition switch START
    Refrigerant pressure normal: 0.18 MPa (1.9 kgf/cm2, 26 psi) to 3.03 MPa (31.0 kgf/cm2, 440 psi)
    A/C switch ON
    Blower switch ON
    		10 to 14 V
    PSW (A14-3) - GND (A14-18)
    		Y-B - L
    		A/C pressure switch signal
    		Ignition switch START
    Refrigerant pressure less than: 0.18 MPa (1.9 kgf/cm2, 26 psi) or more than 3.03 MPa (31.0 kgf/cm2, 440 psi)
    A/C switch ON
    Blower switch ON
    		Below 1 V
    TE (A14-7) - SG-1 (A14-8)
    		G - P
    		A/C evaporator temperature sensor signal
    		Ignition switch ON
    Evaporator temperature is 0°C (32°F)
    Temperature control knob: MAX COOL
    		2.0 to 2.4 V
    TE (A14-7) - SG-1 (A14-8)
    		G - P
    		A/C evaporator temperature sensor signal
    		Ignition switch ON
    Evaporator temperature is 15°C (59°F)
    Temperature control knob: MAX COOL
    		1.4 to 1.8 V
    SG1-1 (A14-8) - Body ground
    		P-L
    		Ground for A/C evaporator temperature sensor
    		Always
    		Below 1 Ω
    MGC (A14-1) - GND (A14-18)
    		L-W - L
    		Magnet clutch signal
    		Ignition switch START
    Magnet clutch is not engaged
    		Below 1 V
    MGC (A14-1) - GND (A14-18)
    		L-W - L
    		Magnet clutch signal
    		Ignition switch START
    Magnet clutch is engaged
    		10 to 14 V
    ACT (A14-2) - GND (A14-18)
    		R-L - L
    		Magnet on permit signal
    		Ignition switch START
    A/C switch OFF
    Blower switch ON
    		Below 1 V
    ACT (A14-2) - GND (A14-18)
    		R-L - L
    		Magnet on permit signal
    		Ignition switch START
    A/C switch ON
    Blower switch ON
    		10 to 14 V
    AC1 (A14-14) - GND (A14-18)
    		Y - L
    		Idle-up request signal
    		Ignition switch START
    Magnet clutch is not engaged
    		10 to 14 V
    AC1 (A14-14) - GND (A14-18)
    		Y - L
    		Idle-up request signal
    		Ignition switch START
    Magnet clutch is engaged
    		Below 1 V
    1. If the result is not specified, the A/C amplifier may have a malfunction.