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

Vehicle Interior. Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25
Heating Air Conditioning. Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25

  1. CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY

  1. CHECK ECM (for 1KD-FTV, 2KD-FTV)

  1. CHECK ECM (for 2TR-FE)

  1. CHECK ECM (for 2TR-FBE)

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



CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY

Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.Heating Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System).Air Conditioning System (For Manual Air Conditioning System) Terminals Of Ecu

  1. Disconnect the G34 air conditioning amplifier assembly connector.

  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
    G34-10 (IG+) - G34-18 (GND)
    		R-L - L
    		Ignition power supply
    		Ignition switch ON
    		11 to 14 V
    Ignition switch off
    		Below 1 V
    G34-18 (GND) - Body ground
    		L - 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 G34 air conditioning amplifier assembly connector.

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

    Terminal No. (Symbol)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    G34-1 (MGC) - G34-18 (GND)
    		L-W - L
    		Cooler compressor assembly operation signal
    1. Engine idling
    2. Blower switch LO level
    3. Cooler switch off or cooler switch on (magnet clutch on not permitted)
    		11 to 14 V
    1. Engine idling
    2. Blower switch LO level
    3. Cooler switch on (magnet clutch on permitted)
    		Below 1 V
    G34-2 (ACT) - G34-18 (GND)
    		R-L - L
    		Magnet clutch on permit signal
    1. Engine idling
    2. Blower switch LO level
    3. Cooler switch on (magnet clutch on)
    		5 to 6 V
    1. Engine idling
    2. Blower switch LO level
    3. Cooler switch off or on (magnet clutch off)
    		Below 1 V
    G34-3 (PSW) - G34-18 (GND)
    		Y-B - L
    		Air conditioner pressure sensor signal
    1. Engine idling
    2. Refrigerant pressure normal
    		Below 1 V
    1. Engine idling
    2. Refrigerant pressure abnormal (below 0.176 MPa [1.8 kgf/cm2, 25.5 psi] or higher than 3.025 MPa [30.9 kgf/cm2, 438.6 psi])
    		11 to 14 V
    G34-4 (ACON) - G34-18 (GND)
    		R-G - L
    		Cooler switch signal
    1. Engine idling
    2. Blower switch LO level
    3. Cooler switch off
    		11 to 14 V
    1. Engine idling
    2. Blower switch LO level
    3. Cooler switch on
    		Below 1 V
    G34-7 (TE) - G34-8 (SG-1)
    		G - P
    		No. 1 cooler thermistor signal
    1. Ignition switch ON
    2. Evaporator temperature 0°C (32°F)
    		2.0 to 2.4 V
    1. Ignition switch ON
    2. Evaporator temperature 15°C (59°F)
    		1.1 to 1.5 V
    G34-8 (SG-1) - Body ground
    		P - Body ground
    		Ground for No. 1 cooler thermistor
    		Always
    		Below 1 Ω
    G34-13 (IND-) - G34-18 (GND)
    		R-L - L
    		Cooler switch indicator signal
    1. Engine idling
    2. Blower switch LO level
    3. Cooler switch off or cooler switch on
    		11 to 14 V
    1. Engine idling
    2. Blower switch LO level
    3. Cooler switch on
    		Below 1 V
    G34-14 (AC1) - G34-18 (GND)
    		Y - L
    		Idle-up request signal
    1. Engine idling
    2. Blower switch LO level
    3. Cooler switch off
    		11 to 14 V
    1. Engine idling
    2. Blower switch LO level
    3. Cooler switch on
    		Below 1 V
    1. If the result is not as specified, the air conditioning amplifier assembly may have a malfunction.

CHECK ECM (for 1KD-FTV, 2KD-FTV)

Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.Heating Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System).Air Conditioning System (For Manual Air Conditioning System) Terminals Of Ecu

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

    Terminal No. (Symbol)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    G38-18 (AC1) - C23-7 (E1)
    		Y - BR
    		Idle-up request signal
    1. Engine idling
    2. Blower switch on (LO level)
    3. Cooler switch on
    		Below 1 V
    1. Engine idling
    2. Blower switch on (LO level)
    3. Cooler switch off
    		11 to 14 V
    G38-19 (ACT) - C23-7 (E1)
    		R-L - BR
    		Magnet clutch on permit output signal
    1. Engine idling
    2. Blower switch on (LO level)
    3. Cooler switch off or on (magnet clutch off)
    		Below 1 V
    1. Engine idling
    2. Blower switch on (LO level)
    3. Cooler switch on (magnet clutch on)
    		11 to 14 V
    If the result is not as specified, the ECM may have a malfunction.

CHECK ECM (for 2TR-FE)

Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.Heating Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System).Air Conditioning System (For Manual Air Conditioning System) Terminals Of Ecu

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

    Terminal No. (Symbol)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    G88-24 (AC1) - C75-3 (E1)
    		Y - BR
    		Idle-up request signal
    1. Engine idling
    2. Blower switch on (LO level)
    3. Cooler switch on
    		Below 1 V
    1. Engine idling
    2. Blower switch on (LO level)
    3. Cooler switch off
    		11 to 14 V
    G88-25 (ACT) - C75-3 (E1)
    		R-L - BR
    		Magnet clutch on permit output signal
    1. Engine idling
    2. Blower switch on (LO level)
    3. Cooler switch off or on (magnet clutch off)
    		Below 1 V
    1. Engine idling
    2. Blower switch on (LO level)
    3. Cooler switch on (magnet clutch on)
    		11 to 14 V
    If the result is not as specified, the ECM may have a malfunction.

CHECK ECM (for 2TR-FBE)

Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.Heating Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System).Air Conditioning System (For Manual Air Conditioning System) Terminals Of Ecu

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

    Terminal No. (Symbol)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    G146-19 (AC1) - C98-5 (E1)
    		Y - BR
    		Idle-up request signal
    1. Engine idling
    2. Blower switch on (LO level)
    3. Cooler switch on
    		Below 1 V
    1. Engine idling
    2. Blower switch on (LO level)
    3. Cooler switch off
    		11 to 14 V
    G146-21 (ACT) - C98-5 (E1)
    		R-L - BR
    		Magnet clutch on permit output signal
    1. Engine idling
    2. Blower switch on (LO level)
    3. Cooler switch off or on (magnet clutch off)
    		Below 1 V
    1. Engine idling
    2. Blower switch on (LO level)
    3. Cooler switch on (magnet clutch on)
    		11 to 14 V
    If the result is not as specified, the ECM may have a malfunction.