Terminals Of Ecu [11/2018 - 02/2019]

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the G46 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
   G46-5 (B) - Body ground	G - Body ground	Power source (Back-up)	Power switch off	11 to 14 V
   G46-6 (IG+) - Body ground	GR - Body ground	Power source (IG)	Power switch on (IG)	11 to 14 V
   			Power switch off	Below 1 V
   G46-17 (GND) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω

3. Reconnect the G46 air conditioning amplifier assembly connector.
4. Measure the voltage, resistance and pulse according to the value(s) in the table below.

   Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
   G47-1 (TAM) - G47-14 (SG-2)	R - R	Ambient temperature sensor signal	Power switch on (IG) (do not start the engine and electric motor) Ambient temperature: 25°C (77°F)	1.05 to 1.45 V
   			Power switch on (IG) (do not start the engine and electric motor) Ambient temperature: 40°C (104°F)	0.64 to 0.87 V
   G47-3 (SG-1) - Body ground	G - Body ground	Ground for sensor	Always	Below 1 Ω
   G47-5 (TR) - Body ground	GR - Body ground	Room temperature sensor signal	Power switch on (IG) Cabin temperature: 25°C (77°F)	1.05 to 1.45 V
   			Power switch on (IG) Cabin temperature: 40°C (104°F)	0.64 to 0.87 V
   G47-6 (PRE) - G47-15 (SG-4)	GR - L	Air conditioner pressure sensor signal	Power switch on (READY) Air conditioning system operating Refrigerant pressure: Normal pressure (below 3025 kPa [30.8 kgf/cm2 , 439 psi] and higher than 176 kPa [1.8 kgf/cm2 , 26 psi])	0.74 to 4.61 V
   			Power switch on (READY) Air conditioning system operating Refrigerant pressure: Abnormal pressure (less than 176 kPa (1.8 kgf/cm2 , 26 psi))	Below 0.74 V
   			Power switch on (READY) Air conditioning system operating Refrigerant pressure: Abnormal pressure (more than 3025 kPa (30.8 kgf/cm2 , 439 psi))	4.61 V or higher
   G47-11 (S5-3) - Body ground	L - Body ground	Power source of sensor	Power switch off → on (IG)	Below 1 V → 4.75 to 5.25 V
   G47-14 (SG-2) - Body ground	R - Body ground	Ground for sensor	Always	Below 1 Ω
   G47-15 (SG-4) - Body ground	L - Body ground	Ground for sensor	Always	Below 1 Ω
   G46-1 (CANL)	-	CAN communication line	-	-
   G46-2 (CANH)	-	CAN communication line	-	-
   G46-7 (LIN1) - Body ground	BE - Body ground	LIN communication signal	Power switch on (IG)	Pulse generation (See waveform 1)
   G46-11 (ECOS) - Body ground	W - Body ground	Integration control and panel assembly (ECO switch) signal	Power switch on (IG) Integration control and panel assembly (ECO switch) Off → On	11 to 14 V → Below 1 V
   G46-21 (BLW) - Body ground	Y - Body ground	Blower motor speed control signal	Power switch on (IG) Blower switch: LO	Pulse generation (See waveform 2)
   z11-2 (BUS G) - Body ground	-	Ground for BUS IC	Always	Below 1 Ω
   z11-3 (BUS) - z11-2 (BUS G)	-	BUS IC control signal	Power switch on (IG)	Pulse generation (See waveform 3)
   z11-4 (B BUS) - z11-2 (BUS G)	-	Power supply for BUS IC	Power switch off	11 to 14 V
   z11-5 (SGA) - Body ground	-	Ground for No. 1 cooler thermistor	Always	Below 1 Ω
   z11-6 (TEA) - z11-5 (SGA)	-	No. 1 cooler thermistor signal	Power switch on (IG) Evaporator temperature: 0°C (32°F)	1.7 to 2.1 V
   			Power switch on (IG) Evaporator temperature: 15°C (59°F)	0.9 to 1.3 V

5. Waveform 1:
   Fig 1: Waveform 1

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Item	Content
   Terminal No.	G46-7 (LIN1) - Body ground
   Tool Setting	2 V/DIV., 20 μs./DIV.
   Vehicle Condition	Power switch on (IG)

6. Waveform 2:
   Fig 2: Waveform 2

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Item	Content
   Terminal No.	G46-21(BLW) - Body ground
   Tool Setting	1 V/DIV., 500 μs./DIV.
   Vehicle Condition	Power switch on (IG) Blower switch: LO

7. Waveform 3:
   Fig 3: Waveform 3

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Item	Content
   Terminal No.	z11-3 (BUS) - z11-2 (BUS G)
   Tool Setting	2 V/DIV., 20 μs./DIV.
   Vehicle Condition	Power switch on (IG)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the G24 air conditioning control 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
   G24-13 (GND) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω
   G24-9 (IG+) - Body ground	LA-B - Body ground	Power source (IG)	Power switch off	Below 1 V
   			Power switch on (IG)	11 to 14 V

3. Reconnect the G24 air conditioning control assembly connector.
4. Check for waveform according to the value(s) in the table below.

   Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
   G24-7 (LIN1) - Body ground	LG - Body ground	LIN communication	Power switch on (IG)	Pulse generation (See waveform 1)

5. Waveform 1:
   Fig 4: Waveform 1

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Item	Content
   Terminal No.	G24-7 (LIN1) - Body ground
   Tool Setting	2 V/DIV., 20 μs./DIV.
   Vehicle Condition	Power switch on (IG)

Refer to TERMINALS OF ECU [11/2018 - 06/2020]

Refer to TERMINALS OF ECU [11/2018 - 10/2019]