Toyota CH-R Service Manual: Terminals Of Ecu

Toyota CH-R Service Manual / Heating / Air Conditioning / Air Conditioning System(for Automatic Air Conditioning System With Side-mounted Air Conditioner Pressure Sensor) / Terminals Of Ecu

TERMINALS OF ECU

AIR CONDITIONING AMPLIFIER ASSEMBLY

HINT:

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

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
F138-1 (SG-1) - Body ground	LG - Body ground	Ground for cooler thermistor (room temperature sensor)	Always	Below 1 V
F138-2 (SG-2) - Body ground	G - Body ground	Ground for air conditioner pressure sensor	Always	Below 1 V
F138-6 (S5-3) - F138-2 (SG-2)	GR - G	Power supply for air conditioner pressure sensor	Ignition switch ON	4.75 to 5.25 V
F138-6 (S5-3) - F138-2 (SG-2)	GR - G	Power supply for air conditioner pressure sensor	Ignition switch off	Below 1 V
F138-14 (TR) - F138-1 (SG-1)	B - LG	Cooler thermistor (room temperature sensor) signal	Ignition switch ON Cabin temperature: 25°C (77°F)	1.8 to 2.2 V
F138-14 (TR) - F138-1 (SG-1)	B - LG	Cooler thermistor (room temperature sensor) signal	Ignition switch ON Cabin temperature: 40°C (104°F)	1.2 to 1.6 V
F138-24 (PRE) - F138-2 (SG-2)	V - G	Air conditioner pressure sensor signal	Engine running Air conditioning system operating Refrigerant pressure: Abnormal pressure (more than 3025 kPa (30.8 kgf/cm2, 439 psi))	4.61 V or higher
			Engine running Air conditioning system operating Refrigerant pressure: Abnormal pressure (less than 176 kPa (1.8 kgf/cm2, 26 psi))	Below 0.74 V
			Engine running Air conditioning system operating Refrigerant pressure: Normal pressure (less than 3025 kPa (30.8 kgf/cm2, 439 psi) and more than 176 kPa (1.8 kgf/cm2, 26 psi))	0.74 to 4.61 V
F139-1 (B) - F139-4 (GND)	V - W-B	Power source (Back-up)	Always	11 to 14 V
F139-2 (IG+) - F139-4 (GND)	B - W-B	Power source (IG)	Ignition switch ON	11 to 14 V
F139-2 (IG+) - F139-4 (GND)	B - W-B	Power source (IG)	Ignition switch off	Below 1 V
F139-3 (SOL+) - F139-4 (GND)	B - W-B	Compressor solenoid operation signal	Engine running Blower switch: Lo A/C switch: On	Pulse generation (See waveform 1)
F139-4 (GND) - Body ground	W-B - Body ground	Ground for main power supply	Always	Below 1 V
F139-6 (BLW) - F139-4 (GND)	Y - W-B	Blower motor speed control signal	Ignition switch ON Blower switch: Lo	Pulse generation (See waveform 2)
F139-11 (CANH) - F139-12 (CANL)	P - SB	CAN communication signal	CAN communication is performed	Pulse generation
F139-14 (LIN1) - F139-4 (GND)	BE - W-B	LIN communication signal (Air conditioning control assembly)	Ignition switch ON	Pulse generation (See waveform 3)
m1-2 (BUSG) - Body ground	B - Body ground	Ground for BUS IC	Always	Below 1 V
m1-3 (BUS) - m1-2 (BUSG)	L - B	BUS IC control signal	Ignition switch ON	Pulse generation (See waveform 4)
m1-4 (BUSB) - m1-2 (BUSG)	R - B	Power supply for BUS IC	Always	11 to 14 V
m1-5 (SG-4) - Body ground	GR - Body ground	Ground for No. 1 cooler thermistor (evaporator temperature sensor)	Always	Below 1 V
m1-6 (TE) - m1-5 (SG-4)	GR - GR	No. 1 cooler thermistor (evaporator temperature sensor)	Ignition switch ON Evaporator temperature: 0°C (32°F)	1.7 to 2.1 V
m1-6 (TE) - m1-5 (SG-4)	GR - GR	No. 1 cooler thermistor (evaporator temperature sensor)	Ignition switch ON Evaporator temperature: 15°C (59°F)	0.9 to 1.3 V

(a) Waveform 1:

Item	Content
Terminal No. (Symbol)	F139-3 (SOL+) - F139-4 (GND)
Tool Setting	5 V/DIV., 500 μs/DIV.
Vehicle Condition	Engine running Blower switch: Lo A/C switch: on

(b) Waveform 2:

Item	Content
Terminal No.	F139-6 (BLW) - F139-4 (GND)
Tool Setting	2 V/DIV., 1 ms./DIV.
Vehicle Condition	Ignition switch ON Blower switch: Lo

Item	Content
Terminal No.	F139-14 (LIN1) - F139-4 (GND)
Tool Setting	2 V/DIV., 20 ms./DIV.
Vehicle Condition	Ignition switch ON

(d) Waveform 4:

Item	Content
Terminal No.	m1-3 (BUS) - m1-2 (BUS G)
Tool Setting	2 V/DIV., 2 ms./DIV.
Vehicle Condition	Ignition switch ON

AIR CONDITIONING CONTROL ASSEMBLY

HINT:

Check from the rear of the connector while it is connected to the air conditioning control assembly.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
F61-16 (GND) - Body ground	W-B - Body ground	Ground for air conditioning control assembly	Always	Below 1 V
F61-2 (LIN1) - Body ground	BE - Body ground	LIN communication signal	Ignition switch ON	Pulse generation (See waveform 1)
F61-10 (IG+) - F61-16 (GND)	BE - W-B	Power source (IG)	Ignition switch off	Below 1 V
F61-10 (IG+) - F61-16 (GND)	BE - W-B	Power source (IG)	Ignition switch ON	11 to 14 V

(a) Waveform 1:

Item	Content
Terminal No.	F61-2 (LIN1) - Body ground
Tool Setting	2 V/DIV., 20 ms./DIV.
Vehicle Condition	Ignition switch ON

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