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

Vehicle Interior. Land Cruiser. Urj200, 202 Grj200 Vdj200
Heating Air Conditioning. Land Cruiser. Urj200, 202 Grj200 Vdj200

  1. CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY (w/ Rear Heater)

  1. CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY (w/o Rear Heater)

  1. CHECK AIR CONDITIONING CONTROL ASSEMBLY (w/o Navigation System)

  1. CHECK NO. 2 AIR CONDITIONING CONTROL ASSEMBLY

  1. CHECK MAIN BODY ECU (COWL SIDE JUNCTION BLOCK LH)

  1. MULTI-DISPLAY ASSEMBLY (w/ Navigation System)

  1. MULTI-MEDIA MODULE RECEIVER ASSEMBLY (w/ Navigation System)

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



CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY (w/ Rear Heater)

Land Cruiser. Urj200, 202 Grj200 Vdj200.Heating Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System).Air Conditioning System (For Automatic Air Conditioning System) Terminals Of Ecu

  1. Disconnect the E36 and E35 air conditioning amplifier assembly connectors.

  2. Measure the voltage and resistance according to the value(s) in the table below.

    Terminal No. (Symbol)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    E36-6 (+B1) - E36-1 (GND)
    		R - W-B
    		Battery power supply
    		Always
    		11 to 14 V
    E36-7 (+B2) - E36-1 (GND)
    		R - W-B
    		Battery power supply
    		Always
    		11 to 14 V
    E36-5 (IG+) - E36-1 (GND)
    		G - W-B
    		Ignition power supply
    		Engine switch on (IG)
    		11 to 14 V
    Engine switch off
    		Below 1 V
    E36-2 (E1) - Body ground
    		W-B - Body ground
    		Ground
    		Always
    		Below 1 Ω
    E36-1 (GND) - Body ground
    		W-B - Body ground
    		Ground
    		Always
    		Below 1 Ω
    E35-6 (E2) - Body ground
    		W-B - Body ground
    		Ground
    		Always
    		Below 1 Ω
    1. If the result is not as specified, there may be a malfunction on the wire harness side.

  3. Reconnect the E36 and E35 air conditioning amplifier assembly connectors.

  4. Measure the voltage and waveform according to the value(s) in the table below.

    Terminal No. (Symbol)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    z53-3 (B BUS) - z53-1 (BUS G)
    		-
    		Power supply for BUS IC (for front)
    		Always
    		11 to 14 V
    z53-10 (B BUS) - z53-8 (BUS G)
    		-
    		Power supply for BUS IC (for front)
    		Always
    		11 to 14 V
    E36-14 (RBBU) - E36-12 (RBUG)
    		L - BR
    		Power supply for BUS IC (for rear)
    		Always
    		11 to 14 V
    E35-25 (TR3) - Body ground
    		V - Body ground
    		Power supply for driver side duct sensor
    		Engine switch on (IG)
    Driver side duct sensor temperature: 25°C (77°F)
    		4.8 to 5.2 kΩ
    E35-26 (TR4) - Body ground
    		W - Body ground
    		Power supply for front passenger side duct sensor
    		Engine switch on (IG)
    Front passenger side duct sensor temperature: 25°C (77°F)
    		4.8 to 5.2 kΩ
    E35-16 (SG-2) - Body ground
    		G - Body ground
    		Ground for pressure sensor
    		Always
    		Below 1 Ω
    E35-29 (SG-5) - Body ground
    		G - Body ground
    		Ground for compressor signal
    		Always
    		Below 1 Ω
    E35-32 (SG-1) - Body ground
    		B - Body ground
    		Ground for room temperature sensor (for front)
    		Always
    		Below 1 Ω
    z53-6 (SGA) - Body ground
    		-
    		Ground for evaporator temperature sensor
    		Always
    		Below 1 Ω
    z53-1 (BUS G) - Body ground
    		-
    		Ground for BUS IC (for front)
    		Always
    		Below 1 Ω
    z53-8 (BUS G) - Body ground
    		-
    		Ground for BUS IC (for front)
    		Always
    		Below 1 Ω
    E35-34 (SGND) - Body ground
    		BR - Body ground
    		Ground for driver side duct sensor
    		Always
    		Below 1 Ω
    E35-12 (SG-9) - Body ground
    		L - Body ground
    		Ground for front passenger side duct sensor
    		Always
    		Below 1 Ω
    E35-2 (SG-6) - Body ground
    		G - Body ground
    		Ground for room temperature sensor signal (for Rear LH and Rear RH)
    		Always
    		Below 1 Ω
    E36-12 (RBUG) - Body ground
    		BR - Body ground
    		Ground for BUS IC (for rear)
    		Always
    		Below 1 Ω
    E35-1 (SG) - Body ground
    		P - Body ground
    		Ground for evaporator temperature sensor signal (for Rear)
    		Always
    		Below 1 Ω
    E36-25 (CFN+) - Body ground*1
    		R - Body ground
    		Condenser fan operation signal
    		Engine switch on (IG)
    		11 to 14 V
    E36-33 (COOL) - Body ground
    		W - Body ground
    		Cool box operation signal
    		Engine switch on (IG)
    Cool box switch: On
    		11 to 14 V
    E36-29 (AC1) - Body ground
    		L - Body ground
    		Compressor operation signal
    		Engine switch on (IG)
    Blower switch: Lo
    A/C switch: Off
    		11 to 14 V
    Engine switch on (IG)
    Blower switch: Lo
    A/C switch: On
    		Below 1 V
    E36-22 (ACT) - Body ground
    		G - Body ground
    		Compressor operation signal
    		Engine switch on (IG)
    Blower switch: Lo
    A/C switch: Off or on (magnet clutch off)
    		Below 1 V
    Engine switch on (IG)
    Blower switch: Lo
    A/C switch: On (magnet clutch on)
    		11 to 14 V
    E35-28 (LOCK) - E35-29 (SG-5)
    		L - G
    		Air compressor lock sensor signal
    		Engine idling
    A/C switch: On (magnet clutch on)
    Blower switch: Lo
    		Pulse generation
    (see waveform 1)
    E35-10 (TAM) - E35-16 (SG-2)
    		V - G
    		Ambient temperature sensor signal
    		Engine switch on (IG)
    Ambient temperature:
    25°C (77°F)
    		1.6 to 1.8 V
    Engine switch on (IG)
    Ambient temperature:
    50°C (122°F)
    		0.5 to 0.7 V
    E35-27 (S5-1) - E35-16 (SG-2)
    		LG - G
    		Power supply for pressure sensor
    		Engine switch on (IG)
    		4.5 to 5.5 V
    E35-20 (PRE) - E35-16 (SG-2)
    		R - G
    		Air conditioning pressure sensor signal
    		Refrigerant pressure:
    Normal
    		1.0 to 4.8 V
    Refrigerant pressure:
    Abnormal (less than 0.392 MPa [4.0 kgf/cm2, 57 psi])
    		Below 1 V
    Refrigerant pressure:
    Abnormal (less than 3.187 MPa [32.5 kgf/cm2, 463 psi])
    		4.8 V or higher
    E36-18 (MGC) - E36-1 (GND)
    		R - W-B
    		Compressor magnet clutch operation signal
    		Engine idling
    Blower switch: Lo
    A/C switch: On (magnet clutch on permitted)
    		Below 1 V
    E36-3 (BLW) - E36-1 (GND)
    		R - W-B
    		Blower motor control signal
    		Engine switch on (IG)
    Blower switch: Lo
    		Pulse generation
    (see waveform 2)
    E35-9 (TR) - E35-32 (SG-1)
    		W - B
    		Room temperature sensor signal (for front)
    		Engine switch on (IG)
    Front side interior temperature: 25°C (77°F)
    		1.6 to 1.8 V
    Room temperature sensor signal (for front)
    		Engine switch on (IG)
    Front side interior temperature: 50°C (122°F)
    		0.5 to 0.7 V
    E35-7 (TSD) - Body ground
    		LG - Body ground
    		Driver side solar sensor signal
    		Engine switch on (IG)
    Solar sensor subjected to electric light
    		0.8 to 4.3 V
    E35-8 (TSP) - Body ground
    		GR - Body ground
    		Passenger side solar sensor signal
    		Engine switch on (IG)
    Solar sensor subjected to electric light
    		0.8 to 4.3 V
    z53-7 (TEA) - z53-6 (SGA)
    		-
    		Evaporator temperature sensor signal
    		Engine switch on (IG)
    Evaporator temperature: 15°C (59°F)
    		1.4 to 1.8 V
    z53-2 (BUS) - z53-1 (BUS G)
    		-
    		BUS IC control signal (for front)
    		Engine switch on (IG)
    		Pulse generation
    z53-9 (BUS) - z53-8 (BUS G)
    		-
    		BUS IC control signal (for front)
    		Engine switch on (IG)
    		Pulse generation
    E35-18 (TR) - E35-2 (SG-6)
    		R - G
    		Room temperature sensor signal (for Rear LH)
    		Engine switch on (IG)
    Vehicle interior temperature: 25°C (77°F)
    		1.6 to 1.8 V
    Engine switch on (IG)
    Vehicle interior temperature: 50°C (122°F)
    		0.5 to 0.7 V
    E35-19 (TR7) - E35-2 (SG-6)
    		R - G
    		Room temperature sensor signal (for Rear RH)
    		Engine switch on (IG)
    Vehicle interior temperature: 25°C (77°F)
    		1.6 to 1.8 V
    Engine switch on (IG)
    Vehicle interior temperature: 50°C (122°F)
    		0.5 to 0.7 V
    E36-13 (RBUS) - E36-12 (RBUG)
    		R - BR
    		BUS IC control signal (for rear)
    		Engine switch on (IG)
    		Pulse generation
    E35-17 (TEC) - E35-1 (SG)
    		W - P
    		Evaporator temperature sensor signal (for Rear)
    		Engine switch on (IG)
    Evaporator temperature:
    15°C (59°F)
    		1.4 to 1.8 V
    E36-31 (ALT) - Body ground
    		R - Body ground
    		Generator signal
    		Engine idling
    		Pulse generation
    E36-32 (SW1) - Body ground
    		BR - Body ground
    		Idle up operation signal
    		Engine switch on (IG)
    Idle up switch: Off
    		Below 1 V
    Engine switch on (IG)
    Idle up switch: On
    		11 to 14 V
    E36-20 (LIN1) - E36-1 (GND)
    		Y - W-B
    		LIN communication signal
    (for A/C switch)
    		Engine switch on (IG)
    		Pulse generation
    E36-21 (RLIN) - E36-1 (GND)
    		L - W-B
    		LIN communication signal
    (for Rear A/C switch)
    		Engine switch on (IG)
    		Pulse generation
    E36-27 (PTC1) - Body ground*2
    		W - Body ground
    		PTC1 heater relay operation signal
    		Engine idling
    Set temperature: MAX HOT
    Engine coolant temperature: Below 65°C (149°F)
    Ambient temperature: Below 10°C (50°F)
    Blower switch: Off → Lo
    		Below 1 V → 11 to 14 V
    E36-26 (PTC2) - Body ground*2
    		R - Body ground
    		PTC2 heater relay operation signal
    E36-35 (PTC3) - Body ground*2
    		R - Body ground
    		PTC3 heater relay operation signal
    E36-17 (BLWH) - E36-1 (GND)
    		L - W-B
    		Blower motor control signal (for rear)
    		Engine switch on (IG)
    Blower switch: Lo
    		Pulse generation
    (see waveform 3)
    E36-19 (RMGV) - E36-1 (GND)
    		B - W-B
    		Rear cooling unit expansion valve signal
    		Engine switch on (IG)
    		11 to 14 V
    1. *1: w/ Condenser Fan
    2. *2: w/ PTC Heater


    5. Land Cruiser. Urj200, 202 Grj200 Vdj200.Heating 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, check waveform 1.

    Compressor Lock Sensor Signal
    Item
    		Content
    Terminal No. (Symbol)
    		E35-28 (LOCK) - E35-29 (SG-5)
    Tool Setting
    		200 mV/DIV., 10 ms/DIV.
    Condition
    		Engine idling
    Blower switch: Lo
    A/C switch: On
    HINT:
    When the rear blower level is increased, the duty ratio changes accordingly.


    6. Land Cruiser. Urj200, 202 Grj200 Vdj200.Heating 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, check waveform 2.

    Blower Motor Control Signal
    Item
    		Content
    Terminal No. (Symbol)
    		E36-3 (BLW) - E36-1 (GND)
    Tool Setting
    		1 V/DIV., 500 μs/DIV.
    Condition
    		Engine switch on (IG)
    Blower switch: Lo
    HINT:
    When the blower level is increased, the duty ratio changes accordingly.


    7. Land Cruiser. Urj200, 202 Grj200 Vdj200.Heating Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System).Air Conditioning System (For Automatic Air Conditioning System) Terminals Of Ecu

  7. Using an oscilloscope, check waveform 3.

    Rear Blower Motor Control Signal
    Item
    		Content
    Terminal No. (Symbol)
    		E36-17 (BLWH) - E36-1 (GND)
    Tool Setting
    		1 V/DIV., 500 μs/DIV.
    Condition
    		Engine switch on (IG)
    Blower switch: Lo
    HINT:
    When the rear blower level is increased, the duty ratio changes accordingly.

CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY (w/o Rear Heater)

Land Cruiser. Urj200, 202 Grj200 Vdj200.Heating Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System).Air Conditioning System (For Automatic Air Conditioning System) Terminals Of Ecu

  1. Disconnect the E81 air conditioning amplifier assembly connector.

  2. Measure the resistance and voltage according to the value(s) in the table below.

    Terminal No. (Symbol)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    E81-21 (+B1) - E81-14 (GND)
    		R - W-B
    		Battery power supply
    		Always
    		11 to 14 V
    E81-1 (IG+) - E81-14 (GND)
    		G - W-B
    		Ignition power supply
    		Engine switch on (IG)
    		11 to 14 V
    Engine switch off
    		Below 1 V
    E81-14 (GND) - Body ground
    		W-B - Body ground
    		Ground
    		Always
    		Below 1 Ω
    1. If the result is not as specified, there may be a malfunction on the wire harness side.

  3. Reconnect the E81 air conditioning amplifier assembly connector.

  4. Measure the voltage and waveform according to the value(s) in the table below.

    Terminal No. (Symbol)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    z54-4 (B BUS) - z54-2 (BUS G)
    		-
    		Power supply for BUS IC (for front)
    		Always
    		11 to 14 V
    E81-35 (SG-5) - Body ground
    		G - Body ground
    		Ground for compressor signal
    		Always
    		Below 1 Ω
    E81-13 (SG-2) - Body ground
    		G - Body ground
    		Ground for pressure sensor
    		Always
    		Below 1 Ω
    E81-34 (SG-1) - Body ground
    		B - Body ground
    		Ground for room temperature sensor (for front)
    		Always
    		Below 1 Ω
    z54-2 (BUS G) - Body ground
    		-
    		Ground for BUS IC (for front)
    		Always
    		Below 1 Ω
    z54-5 (SGA) - Body ground
    		-
    		Ground for evaporator temperature sensor
    		Always
    		Below 1 Ω
    E81-8 (LOCK) - E81-35 (SG-5)
    		L - G
    		Air compressor lock sensor signal
    		Engine idling
    A/C switch: On (magnet clutch on)
    Blower switch: Lo
    		Pulse generation
    (see waveform 1)
    E81-39 (CFN+) - Body ground*1
    		R - Body ground
    		Condenser fan operation signal
    		Engine switch on (IG)
    A/C switch: Off
    		Below 1 V
    Engine switch on (IG)
    A/C switch: On
    		11 to 14 V
    E81-15 (COOL) - Body ground
    		W - Body ground
    		Cool box operation signal
    		Engine switch on (IG)
    Cool box switch: Off
    		Below 1 V
    Engine switch on (IG)
    Cool box switch: On
    		11 to 14 V
    E81-17 (AC1) - Body ground
    		L - Body ground
    		Compressor operation signal
    		Engine switch on (IG)
    Blower switch: Lo
    A/C switch: Off
    		Below 1 V
    Engine switch on (IG)
    Blower switch: Lo
    A/C switch: On
    		11 to 14 V
    E81-27 (ACT) - Body ground
    		G - Body ground
    		Compressor operation signal
    		Engine switch on (IG)
    Blower switch: Lo
    A/C switch: Off or on (magnet clutch off)
    		Below 1 V
    Engine switch on (IG)
    Blower switch: Lo
    A/C switch: On (magnet clutch on)
    		11 to 14 V
    E81-5 (TAM) - E81-13 (SG-2)
    		V - G
    		Ambient temperature sensor signal
    		Engine switch on (IG)
    Ambient temperature: 25°C (77°F)
    		1.6 to 1.8 V
    Engine switch on (IG)
    Ambient temperature: 50°C (122°F)
    		0.5 to 0.7 V
    E81-30 (S5-1) - E81-13 (SG-2)
    		LG - G
    		Power supply for pressure sensor
    		Engine switch on (IG)
    		4.5 to 5.5 V
    E81-9 (PRE) - E81-13 (SG-2)
    		R - G
    		Air conditioning pressure sensor signal
    		Refrigerant pressure: Normal
    		1.0 to 4.8 V
    Refrigerant pressure: Abnormal (less than 0.392 MPa [4.0 kgf/cm2, 57 psi])
    		Below 1 V
    Refrigerant pressure: Abnormal (less than 3.187 MPa [32.5 kgf/cm2, 463 psi])
    		4.8 V or higher
    E81-20 (MGC) - E81-14 (GND)
    		R - W-B
    		Compressor magnet clutch operation signal
    		Engine idling
    Blower switch: Lo
    A/C switch: On (magnet clutch on permitted)
    		Below 1 V
    E81-18 (RCRL) - E81-14 (GND)
    		B - Body ground
    		Rear cooler control relay operation signal
    		Engine switch on (IG)
    Rear blower switch: Off
    		Below 1 V
    Engine switch on (IG)
    Rear blower switch: Lo
    		11 to 14 V
    E81-23 (BLW) - E81-14 (GND)
    		R - W-B
    		Blower motor control signal
    		Engine switch on (IG)
    Blower switch: Lo
    		Pulse generation
    (see waveform 2)
    E81-29 (TR) - E81-34 (SG-1)
    		W - B
    		Room temperature sensor signal (for front)
    		Engine switch on (IG)
    Front side interior temperature: 25°C (77°F)
    		1.6 to 1.8 V
    Engine switch on (IG)
    Front side interior temperature: 50°C (122°F)
    		0.5 to 0.7 V
    E81-32 (TSP) - Body ground
    		GR - Body ground
    		Passenger side solar sensor signal
    		Engine switch on (IG)
    Solar sensor subjected to electric light
    		0.8 to 4.3 V
    E81-33 (TSD) - Body ground
    		LG - Body ground
    		Driver side solar sensor signal
    		Engine switch on (IG)
    Solar sensor subjected to electric light
    		0.8 to 4.3 V
    E81-36 (SW1) - Body ground
    		BR - Body ground
    		Idle up operation signal
    		Engine switch on (IG)
    Idle up switch: Off
    		Below 1 V
    Engine switch on (IG)
    Idle up switch: On
    		11 to 14 V
    z54-6 (TEA) - z54-5 (SGA)
    		-
    		Evaporator temperature sensor signal
    		Engine switch on (IG)
    Evaporate temperature: 15°C (59°F)
    		1.4 to 1.8 V
    z54-3 (BUS) - z54-2 (BUS G)
    		-
    		BUS IC control signal (for front)
    		Engine switch on (IG)
    		Pulse generation
    E81-37 (LIN1) - E81-14 (GND)
    		Y - W-B
    		LIN communication signal
    		Engine switch on (IG)
    		Pulse generation
    E81-25 (ALT) - Body ground
    		R - Body ground
    		Generator signal
    		Engine idling
    		Pulse generation
    E81-3 (PTC1) - Body ground*2
    		W - Body ground
    		PTC1 heater relay operation signal
    		Engine idling
    Set temperature: MAX HOT
    Engine coolant temperature: Below 65°C (149°F)
    Ambient temperature: Below 10°C (50°F)
    		Below 1 V → 11 to 14 V
    E81-22 (PTC2) - Body ground*2
    		R - Body ground
    		PTC2 heater relay operation signal
    E81-4 (PTC3) - Body ground*2
    		R - Body ground
    		PTC3 heater relay operation signal
    E81-24 (MGCA) - E81-14 (GND)
    		Y - W-B
    		Viscous with magnet clutch operation signal
    		Engine idling
    Idle up switch: On
    		Below 1 V
    1. *1: w/ Condenser Fan
    2. *2: w/ PTC Heater


    5. Land Cruiser. Urj200, 202 Grj200 Vdj200.Heating 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, check waveform 1.

    Compressor Lock Sensor Signal
    Item
    		Content
    Terminal No. (Symbol)
    		E81-8 (LOCK) - E81-35 (SG-5)
    Tool Setting
    		200 mV/DIV., 10 ms/DIV.
    Condition
    		Engine idling
    Blower switch: Lo
    A/C switch: On
    HINT:
    When the rear blower level is increased, the duty ratio changes accordingly.


    6. Land Cruiser. Urj200, 202 Grj200 Vdj200.Heating 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, check waveform 2.

    Blower Motor Control Signal
    Item
    		Content
    Terminal No. (Symbol)
    		E81-23 (BLW) - E81-14 (GND)
    Tool Setting
    		1 V/DIV., 500 μs/DIV.
    Condition
    		Engine switch on (IG)
    Blower switch: Lo
    HINT:
    When the blower level is increased, the duty ratio changes accordingly.

CHECK AIR CONDITIONING CONTROL ASSEMBLY (w/o Navigation System)

Land Cruiser. Urj200, 202 Grj200 Vdj200.Heating Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System).Air Conditioning System (For Automatic Air Conditioning System) Terminals Of Ecu

  1. Disconnect the F10 air conditioning control assembly connector.

  2. Measure the resistance and voltage according to the value(s) in the table below.

    Terminal No. (Symbol)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    F10-7 (IG+) - F10-1 (GND)
    		G - W-B
    		Ignition power supply
    		Engine switch on (IG)
    		11 to 14 V
    Engine switch off
    		Below 1 V
    F10-1 (GND) - Body ground
    		W-B - Body ground
    		Ground
    		Always
    		Below 1 Ω
    1. If the result is not as specified, there may be a malfunction on the wire harness side.

  3. Reconnect the F10 air conditioning control assembly connector.

  4. Measure the resistance and voltage according to the value(s) in the table below.

    Terminal No. (Symbol)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    F10-12 (DTP+) - F10-1 (GND)
    		R - W-B
    		Temperature up switch signal
    		Temperature up switch not pressed
    		Below 1 V
    Temperature up switch pressed
    		Alternating between 3.5 V or higher and below 1 V
    F10-10 (PTP+) - F10-1 (GND)
    		L - W-B
    		Temperature up switch signal
    		Temperature up switch not pressed
    		Below 1 V
    Temperature up switch pressed
    		Alternating between 3.5 V or higher and below 1 V
    F10-9 (S5) - F10-1 (GND)
    		B - W-B
    		Signal ground
    		Always
    		Below 1 Ω
    F10-11 (DTP-) - F10-1 (GND)
    		G - W-B
    		Temperature down switch signal
    		Temperature down switch not pressed
    		Below 1 V
    Temperature down switch pressed
    		Alternating between 3.5 V or higher and below 1 V
    F10-3 (PTP-) - F10-1 (GND)
    		W - W-B
    		Temperature down switch signal
    		Temperature down switch not pressed
    		Below 1 V
    Temperature down switch pressed
    		Alternating between 3.5 V or higher and below 1 V
    F10-2 (SG) - F10-1 (GND)
    		GR - W-B
    		Signal ground
    		Always
    		Below 1 Ω

CHECK NO. 2 AIR CONDITIONING CONTROL ASSEMBLY

Land Cruiser. Urj200, 202 Grj200 Vdj200.Heating Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System).Air Conditioning System (For Automatic Air Conditioning System) Terminals Of Ecu

  1. Disconnect the E55 air conditioning control assembly connector.

  2. Measure the resistance and voltage according to the value(s) in the table below.

    Terminal No. (Symbol)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    E55-6 (IG) - E55-1 (E)
    		G - W-B
    		Ignition power supply
    		Always
    		11 to 14 V
    E55-1 (E) - Body ground
    		W-B - Body ground
    		Ground
    		Always
    		Below 1 Ω
    If the result is not as specified, there may be a malfunction on the wire harness side.

CHECK MAIN BODY ECU (COWL SIDE JUNCTION BLOCK LH)

Land Cruiser. Urj200, 202 Grj200 Vdj200.Heating Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System).Air Conditioning System (For Automatic Air Conditioning System) Terminals Of Ecu

  1. Disconnect the 2A, 2B, and 2D ECU connectors.

  2. Measure the voltage and resistance according to the value(s) in the table below.

    Terminal No. (Symbol)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    2B-20 (BATB) - Body ground
    		L - Body ground
    		Battery power supply
    		Always
    		11 to 14 V
    2A-1 (ACC) - Body ground
    		B - Body ground
    		ACC power supply
    		Engine switch on (ACC)
    		11 to 14 V
    2A-1 (ACC) - Body ground
    		B - Body ground
    		ACC power supply
    		Engine switch off
    		Below 1 V
    2D-62 (GND2) - Body ground
    		W-B - Body ground
    		Ground
    		Always
    		Below 1 Ω
    1. If the result is not as specified, there may be a malfunction on the wire harness side.

MULTI-DISPLAY ASSEMBLY (w/ Navigation System)
Land Cruiser. Urj200, 202 Grj200 Vdj200.Heating Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System).Air Conditioning System (For Automatic Air Conditioning System) Terminals Of Ecu

  1. Measure the resistance and voltage according to the value(s) in the table below.

    Terminal No. (Symbol)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    F90-2 (TEC+) - Body ground
    		R - Body ground
    		Temperature up switch signal
    		Temperature up switch not pressed
    		Below 1 V
    Temperature up switch pressed
    		3.5 V or higher
    F90-3 (TES+) - Body ground
    		L - Body ground
    		Temperature up switch signal
    		Temperature up switch not pressed
    		Below 1 V
    Temperature up switch pressed
    		3.5 V or higher
    F90-6 (AGND) - Body ground
    		B - Body ground
    		Signal ground
    		Always
    		Below 1 Ω
    F90-7 (TEC-) - Body ground
    		G - Body ground
    		Temperature down switch signal
    		Temperature down switch not pressed
    		Below 1 V
    Temperature down switch pressed
    		3.5 V or higher
    F90-8 (TES-) - Body ground
    		W - Body ground
    		Temperature down switch signal
    		Temperature down switch not pressed
    		Below 1 V
    Temperature down switch pressed
    		3.5 V or higher
    F90-9 (BGND) - Body ground
    		GR - Body ground
    		Signal ground
    		Always
    		Below 1 Ω

MULTI-MEDIA MODULE RECEIVER ASSEMBLY (w/ Navigation System) (Click here)