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

Heater & Air Conditioning System. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35
Air Conditioning. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35

  1. CHECK AIR CONDITIONING AMPLIFIER

  1. CHECK AIR CONDITIONING CONTROL

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



CHECK AIR CONDITIONING AMPLIFIER

Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System).Air Conditioning System (For Automatic Air Conditioning System) Terminals Of Ecu

  1. Measure the voltage and resistance of the connectors.

    HINT:
    Check from the rear of the connector while it is connected to the air conditioning amplifier.

    Symbols (Terminal No.)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    SOL+ (E41-2) - GND (E41-14)
    		GR - W-B
    		A/C compressor operation signal
    		Engine idling
    		Pulse generation
    (see waveform 1)
    Refrigerant pressure: normal
    Always
    Blower switch LO
    A/C switch ON
    PRE (E41-9) - SG-2 (E41-13)
    		L - G
    		Air conditioning pressure sensor signal
    		Refrigerant pressure: Abnormal (less than 0.196 MPa [2.0 kgf/cm2, 28 psi])
    		Below 0.76 V
    PRE (E41-9) - SG-2 (E41-13)
    		L - G
    		Air conditioning pressure sensor signal
    		Refrigerant pressure: Abnormal (more than 3.14 MPa [32 kgf/cm2, 455 psi])
    		4.74 V or higher
    BLW (E41-23) - GND (E41-14)
    		R - W-B
    		Blower motor control signal
    		Ignition switch on (IG)
    		Pulse generation
    (see waveform 2)
    Blower switch LO
    TSD (E41-33) - S5-4 (E41-31)
    		L - LG
    		Driver side solar sensor signal
    		Ignition switch on (IG)
    		0.8 to 4.3 V
    Solar sensor subject to electric light
    TSP (E41-32) - S5-4 (E41-31)
    		P - LG
    		Passenger side solar sensor signal
    		Ignition switch on (IG)
    		0.8 to 4.3 V
    Solar sensor subject to electric light
    TR (E41-29) - SG-1 (E41-34)
    		GR- V
    		Room temperature sensor signal
    		Ignition switch on (IG)
    		1.8 to 2.2 V
    Vehicle interior temperature: 25°C (77°F)
    SG-1 (E41-34) - Body ground
    		V - Body ground
    		Ground for room temperature sensor
    		Always
    		Below 1 V
    GND (E41-14) - Body ground
    		W-B - Body ground
    		Ground for main power supply
    		Always
    		Below 1 V
    IG+ (E41-1) - GND (E41-14)
    		Y - W-B
    		Power source (IG)
    		Ignition switch on (IG)
    		10 to 14 V
    S5-3 (E41-10) - GND (E41-14)
    		B - W-B
    		Power supply for pressure sensor
    		Ignition switch on (IG)
    		4.5 to 5.5 V
    CANH (E41-11) - GND (E41-14)
    		V - W-B
    		Hi-level CAN bus line
    		Ignition switch on (IG)
    		Pulse generation
    (see waveform 3)
    CANL (E41-12) - GND (E41-14)
    		W - W-B
    		Lo-level CAN bus line
    		Ignition switch on (IG)
    		Pulse generation
    (see waveform 4)
    RDEF (E41-38) - GND (E41-14)
    		B - W-B
    		Rear defogger switch signal
    		Ignition switch on (IG)
    Rear defogger switch OFF
    		10 to 14 V
    RDEF (E41-38) - GND (E41-14)
    		B - W-B
    		Rear defogger switch signal
    		Ignition switch on (IG)
    Rear defogger switch ON
    		Below 1 V
    SG-2 (E41-13) - Body ground
    		G - Body ground
    		Ground for pressure sensor
    		Always
    		Below 1 V
    PTC1 (E41-3) - Body ground(*1)
    		W - Body ground
    		PTC NO. 1 heater relay operation signal
    		Engine idling
    		Below 1 V → 10 to 14 V
    Set temperature: MAX HOT
    Engine coolant temperature: Below 65°C (149°F)
    Ambient temperature: Below 10°C (50°F)
    Light control switch: OFF
    Blower switch OFF → LO
    PTC2 (E41-22) - Body ground(*1)
    		B - Body ground
    		PTC NO. 2 heater relay operation signal
    		Engine idling
    		Below 1 V → 10 to 14 V
    Set temperature: MAX HOT
    Engine coolant temperature: Below 65°C (149°F)
    Ambient temperature: Below 10°C (50°F)
    Light control switch: OFF
    Blower switch OFF → LO
    ALT (E41-25) - Body ground(*1)
    		B - Body ground
    		Generator signal
    		Engine idling
    		Pulse generation
    HLS (E41-27) - Body ground(*1)
    		BR - Body ground
    		Headlight signal
    		Engine idling
    		Below 1 V
    Light control switch: ON
    LIN1 (E41-37) - GND (E41-14)
    		B - W-B
    		LIN communication signal
    		Ignition switch on (IG)
    		Pulse generation
    LOCK (E41-8) - SG-2 (E41-13)(*2)
    		W - G
    		Compressor lock sensor signal
    		Ignition switch on (IG)
    AUTO switch ON
    A/C switch ON
    Magnetic clutch ON
    		Pulse generation
    (see waveform 5)
    MGC (E41-20) - GND (E41-14)(*2)
    		V - W-B
    		Magnetic clutch relay signal
    		Ignition switch on (IG)
    Magnetic clutch OFF
    		10 to 14 V
    MGC (E41-20) - GND (E41-14)(*2)
    		V - W-B
    		Magnetic clutch relay signal
    		Ignition switch on (IG)
    Magnetic clutch ON
    		Below 1.5 V
    BUB G (c1-2) - Body ground
    		-
    		Ground for BUS IC
    		Always
    		Below 1 V
    BUS (c1-3) - BUB G (c1-2)
    		-
    		BUS IC control signal
    		Ignition switch on (IG)
    		Pulse generation
    B BUS (c1-4) - BUB G (c1-2)
    		-
    		Power supply for BUS IC
    		Ignition switch on (IG)
    		11 to 13 V
    SGA (c1-5) - Body ground
    		-
    		Ground for evaporator temperature sensor
    		Always
    		Below 1 V
    TEA (c1-6) - SGA (c1-5)
    		-
    		Evaporator temperature sensor signal
    		Ignition switch on (IG)
    		1.4 to 1.8 V
    Evaporator temperature: 15°C (59°F)
    HINT:
    *1: w/ PTC heater
    *2: for 2GR-FE


    2. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System).Air Conditioning System (For Automatic Air Conditioning System) Terminals Of Ecu

  2. Using an oscilloscope, measure the waveform 1.

    Compressor and pulley operation signal
    Item
    		Content
    Symbols (Terminal No.)
    		SOL+ (E41-2) - GND (E41-14)
    Tool Setting
    		5 V/DIV., 500 μsec./DIV.
    Condition
    		Engine idling, Blower switch LO, A/C switch ON


    3. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System).Air Conditioning System (For Automatic Air Conditioning System) Terminals Of Ecu

  3. Using an oscilloscope, measure the waveform 2.

    Blower motor control signal
    Item
    		Content
    Symbols (Terminal No.)
    		BLW (E41-23) - GND (E41-14)
    Tool Setting
    		1 V/DIV., 500 μsec./DIV.
    Condition
    		Ignition switch on (IG), Blower switch LO
    HINT:
    When the blower level is increased, the duty ratio changes accordingly.


    4. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System).Air Conditioning System (For Automatic Air Conditioning System) Terminals Of Ecu

  4. Using an oscilloscope, measure the waveform 3.

    CAN communication signal
    Item
    		Content
    Symbols (Terminal No.)
    		CANH (E41-11) - GND (E41-14)
    Tool Setting
    		1 V/DIV., 10 μsec./DIV.
    Condition
    		Ignition switch on (IG)
    HINT:
    The waveform varies depending on the CAN communication signal.


    5. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System).Air Conditioning System (For Automatic Air Conditioning System) Terminals Of Ecu

  5. Using an oscilloscope, measure the waveform 4.

    CAN communication signal
    Item
    		Content
    Symbols (Terminal No.)
    		CANL (E41-12) - GND (E41-14)
    Tool Setting
    		1 V/DIV., 10 μsec./DIV.
    Condition
    		Ignition switch on (IG)
    HINT:
    The waveform varies depending on the CAN communication signal.


    6. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System).Air Conditioning System (For Automatic Air Conditioning System) Terminals Of Ecu

  6. Using an oscilloscope, measure the waveform 5.

    Compressor lock sensor signal
    Item
    		Content
    Symbols (Terminal No.)
    		LOCK (E41-8) - SG-2 (E41-13)
    Tool Setting
    		500 mV/DIV., 20 msec./DIV.
    Condition
    		Ignition switch on (IG), AUTO switch ON, A/C switch ON, Magnetic clutch ON

CHECK AIR CONDITIONING CONTROL

Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System).Air Conditioning System (For Automatic Air Conditioning System) Terminals Of Ecu

  1. Measure the voltage and resistance of the connectors.

    Symbols (Terminal No.)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    IG+ (E26-2) - GND (E26-7)
    		L - W-B
    		Power source (IG)
    		Ignition switch on (IG)
    		10 to 14 V
    GND (E26-7) - Body ground
    		W-B - Body Ground
    		Ground for air conditioning control assembly
    		Always
    		Below 1 V
    LIN1 (E26-11) - GND (E26-7)
    		B - W-B
    		LIN communication signal
    		Ignition switch on (IG)
    		Pulse generation
    +B (E26-1) - GND (E26-7)
    		R - W-B
    		Power source (Back-up)
    		Always
    		10 to 14 V
    ACC (E26-8) - GND (E26-7)
    		GR - W-B
    		ACC power supply
    		Ignition switch on (ACC)
    		10 to 14 V