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 Top-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
F72-1 (B) - Body ground	V - Body ground	Power source (Back-up)	Always	11 to 14 V
F72-3 (LIN1) - F72-29 (GND)	L - W-B	LIN communication signal (Air conditioning control assembly)	Ignition switch ON	Pulse generation (See waveform 1)
F72-5 (IG+) - Body ground	B - Body ground	Power Source (IG)	Ignition switch ON	11 to 14 V
F72-5 (IG+) - Body ground	B - Body ground	Power Source (IG)	Ignition switch off	Below 1 V
F72-9 (CANH) - F72-10 (CANL)	P - SB	CAN communication	CAN communication is performed	Pulse generation
F72-15 (SOL-) - F72-29 (GND)	L - W-B	Compressor solenoid operation	Engine running Blower switch: Lo A/C switch: On	Pulse generation (See waveform 2)
F72-17 (NAIN) - F72-29 (GND)*1	W - W-B	Input of status of ion generator sub-assembly	Ignition switch ON Blower switch: Off	3.5 to 5 V
F72-17 (NAIN) - F72-29 (GND)*1	W - W-B	Input of status of ion generator sub-assembly	Ignition switch ON Blower switch: Lo	Below 2 V
F72-19 (PTC1) - F72-29 (GND)*2	L - W-B	Output for driving PTC1 heater relay	Ignition switch ON ECO mode: off Temperature setting: MAX HOT Ambient temperature: 25°C (77°F) or lower Engine coolant temperature: 75°C (167°F) or lower Light control switch off Blower switch: Lo	Below 1 V
F72-19 (PTC1) - F72-29 (GND)*2	L - W-B	Output for driving PTC1 heater relay	Ignition switch ON ECO mode: off Temperature setting: MAX HOT Ambient temperature: 25°C (77°F) or lower Engine coolant temperature: 75°C (167°F) or lower Light control switch off Blower switch: Off	11 to 14 V
F72-20 (PTC3) - F72-29 (GND)*2	BR - W-B	Output for driving PTC3 heater relay	Ignition switch ON ECO mode: off Temperature setting: MAX HOT Ambient temperature: -7°C (19°F) or lower Engine coolant temperature: 65°C (149°F) or lower Light control switch off Blower switch: Lo	Below 1 V
F72-20 (PTC3) - F72-29 (GND)*2	BR - W-B	Output for driving PTC3 heater relay	Ignition switch ON ECO mode: off Temperature setting: MAX HOT Ambient temperature: -7°C (19°F) or lower Engine coolant temperature: 65°C (149°F) or lower Light control switch off Blower switch: Off	11 to 14 V
F72-29 (GND) - Body ground	W-B - Body ground	Ground for main power supply	Always	Below 1 V
F72-30 (TR) - F72-31 (SG-1)	B - LG	Cooler thermistor (room temperature sensor)	Ignition switch ON Cabin temperature: 25°C (77°F)	1.8 to 1.6 V
F72-30 (TR) - F72-31 (SG-1)	B - LG	Cooler thermistor (room temperature sensor)	Ignition switch ON Cabin temperature: 40°C (104°F)	1.0 to 0.8 V
F72-31 (SG-1) - Body ground	LG - Body ground	Ground for cooler thermistor (room temperature sensor)	Always	Below 1 V
F72-32 (SG-2) - Body ground	G - Body ground	Ground for air conditioner pressure sensor	Always	Below 1 V
F72-33 (PRE) - F72-32 (SG-2)	V - G	Input from refrigerant gas sensor	Ignition switch ON Air conditioning system operating Refrigerant pressure: Abnormal pressure (more than 3025 kPa (30.8 kgf/cm2, 439 psi))	4.61 V or higher
			Ignition switch ON Air conditioning system operating Refrigerant pressure: Abnormal pressure (less than 176 kPa (1.8 kgf/cm2, 26 psi))	Below 0.74 V
			Ignition switch ON 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
F72-34 (S5-3) - F72-32 (SG-2)	GR - G	Power supply for air conditioner pressure sensor	Ignition switch ON	4.75 to 5.25 V
F72-34 (S5-3) - F72-32 (SG-2)	GR - G	Power supply for air conditioner pressure sensor	Ignition switch OFF	Below 1 V
F72-37 (NANO) - F72-29 (GND)*1	R - W-B	Output for driving ion generator sub-assembly	Ignition switch ON Blower switch: Lo	3.5 to 5 V
F72-37 (NANO) - F72-29 (GND)*1	R - W-B	Output for driving ion generator sub-assembly	Ignition switch ON Blower switch: Lo	Below 2 V
F72-39 (PTC2) - F72-29 (GND)*2	V - W-B	Output for driving PTC2 heater relay	Ignition switch ON ECO mode: off Temperature setting: MAX HOT Ambient temperature: 16°C (61°F) or lower Engine coolant temperature: 70°C (158°F) or lower Light control switch off Blower switch: Lo	Below 1 V
F72-39 (PTC2) - F72-29 (GND)*2	V - W-B	Output for driving PTC2 heater relay	Ignition switch ON ECO mode: off Temperature setting: MAX HOT Ambient temperature: 16°C (61°F) or lower Engine coolant temperature: 70°C (158°F) or lower Light control switch off Blower switch: Off	11 to 14 V
F7A-2 (B2AI) - Body ground	-	Output for driving the motor to switch inlet/outlet B2	Ignition switch ON No. 1 blower damper servo sub-assembly (fresh/recirculation) operating	Pulse generation (See waveform 3)
F7A-3 (A2AI) - Body ground	-	Output for driving the motor to switch inlet/outlet A2	Ignition switch ON No. 1 blower damper servo sub-assembly (fresh/recirculation) operating	Pulse generation (See waveform 3)
F7A-4 (A2AO) - Body ground	-	Output for driving the motor to switch mode A2	Ignition switch ON No. 2 air conditioning radiator damper servo sub-assembly (mode switching) operating	Pulse generation (See waveform 4)
F7A-6 (B2AO) - Body ground	-	Output for driving the motor to switch mode B2	Ignition switch ON No. 2 air conditioning radiator damper servo sub-assembly (mode switching) operating	Pulse generation (See waveform 4)
F7A-8 (B1AO) - Body ground	-	Output for driving the motor to switch mode B1	Ignition switch ON No. 2 air conditioning radiator damper servo sub-assembly (mode switching) operating	Pulse generation (See waveform 4)
F7A-9 (A1AI) - Body ground	-	Output for driving the motor to switch inlet/outlet A1	Ignition switch ON No. 1 blower damper servo sub-assembly (fresh/recirculation) operating	Pulse generation (See waveform 3)
F7A-10 (B1AI) - Body ground	-	Output for driving the motor to switch inlet/outlet B1	Ignition switch ON No. 1 blower damper servo sub-assembly (fresh/recirculation) operating	Pulse generation (See waveform 3)
F7A-12 (BLU) - Body ground	-	Power supply to the air mix motor in left upper layer	Ignition switch ON	11 to 14 V
F7A-13 (BAI) - Body ground	-	Power supply to the motor to switch inlet/outlet	Ignition switch ON	11 to 14 V
F7A-14 (BLL) - Body ground	-	Power supply to the air mix motor in left lower layer	Ignition switch ON	11 to 14 V
F7A-16 (A1AO) - Body ground	-	Output for driving the motor to switch mode A1	Ignition switch ON No. 2 air conditioning radiator damper servo sub-assembly (mode switching) operating	Pulse generation (See waveform 4)
F7A-18 (B2LL) - Body ground	-	Output for driving the air mix motor in left lower layer B2	Ignition switch ON No. 1 air conditioning radiator damper servo sub-assembly (driver side lower air mix) operating	Pulse generation (See waveform 5)
F7A-19 (B1LU) - Body ground	-	Output for driving the air mix motor in left upper layer B1	Ignition switch ON No. 1 air conditioning radiator damper servo sub-assembly (driver side upper air mix) operating	Pulse generation (See waveform 6)
F7A-20 (A1LL) - Body ground	-	Output for driving the air mix motor in left lower layer A1	Ignition switch ON No. 1 air conditioning radiator damper servo sub-assembly (driver side lower air mix) operating	Pulse generation (See waveform 5)
F7A-22 (B1RU) - Body ground	-	Output for driving the air mix motor in right upper layer B1	Ignition switch ON No. 1 air conditioning radiator damper servo sub-assembly (front passenger side upper air mix) operating	Pulse generation (See waveform 8)
F7A-23 (A2RL) - Body ground	-	Output for driving the air mix motor in right lower layer A2	Ignition switch ON No. 1 air conditioning radiator damper servo sub-assembly (front passenger side lower air mix) operating	Pulse generation (See waveform 7)
F7A-24 (A1RU) - Body ground	-	Output for driving the air mix motor in right upper layer A1	Ignition switch ON No. 1 air conditioning radiator damper servo sub-assembly (front passenger side upper air mix) operating	Pulse generation (See waveform 8)
F7A-25 (B2RL) - Body ground	-	Output for driving the air mix motor in right lower layer B2	Ignition switch ON No. 1 air conditioning radiator damper servo sub-assembly (front passenger side lower air mix) operating	Pulse generation (See waveform 7)
F7A-26 (B1RL) - Body ground	-	Output for driving the air mix motor in right lower layer B1	Ignition switch ON No. 1 air conditioning radiator damper servo sub-assembly (front passenger side lower air mix) operating	Pulse generation (See waveform 7)
F7A-27 (A2RU) - Body ground	-	Output for driving the air mix motor in right upper layer A2	Ignition switch ON No. 1 air conditioning radiator damper servo sub-assembly (front passenger side upper air mix) operating	Pulse generation (See waveform 8)
F7A-28 (A1RL) - Body ground	-	Output for driving the air mix motor in right lower layer A1	Ignition switch ON No. 1 air conditioning radiator damper servo sub-assembly (front passenger side lower air mix) operating	Pulse generation (See waveform 7)
F7A-29 (B2RU) - Body ground	-	Output for driving the air mix motor in right upper layer B2	Ignition switch ON No. 1 air conditioning radiator damper servo sub-assembly (front passenger side upper air mix) operating	Pulse generation (See waveform 8)
F7A-30 (A2LU) - Body ground	-	Output for driving the air mix motor in left upper layer A2	Ignition switch ON No. 1 air conditioning radiator damper servo sub-assembly (driver side upper air mix) operating	Pulse generation (See waveform 6)
F7A-31 (B2LU) - Body ground	-	Output for driving the air mix motor in left upper layer B	Ignition switch ON No. 1 air conditioning radiator damper servo sub-assembly (driver side upper air mix) operating	Pulse generation (See waveform 6)
F7A-32 (BAO) - Body ground	-	Power supply to the motor to switch mode	Ignition switch ON	11 to 14 V
F7A-33 (BRU) - Body ground	-	Power supply to the air mix motor in right upper layer	Ignition switch ON	11 to 14 V
F7A-34 (BRL) - Body ground	-	Power supply to the air mix motor in right lower layer	Ignition switch ON	11 to 14 V
F7A-35 (B1LL) - Body ground	-	Output for driving the air mix motor in left lower layer B1	Ignition switch ON No. 1 air conditioning radiator damper servo sub-assembly (driver side lower air mix) operating	Pulse generation (See waveform 5)
F7A-36 (A1LU) - Body ground	-	Output for driving the air mix motor in left upper layer A1	Ignition switch ON No. 1 air conditioning radiator damper servo sub-assembly (driver side upper air mix) operating	Pulse generation (See waveform 6)
F7A-37 (A2LL) - Body ground	-	Output for driving the air mix motor in left lower layer A2	Ignition switch ON No. 1 air conditioning radiator damper servo sub-assembly (driver side lower air mix) operating	Pulse generation (See waveform 5)
F7A-38 (TEA) - F7A-39 (SGA)	-	Input No. 1 cooler thermistor	Ignition switch ON Evaporator temperature: 0°C (32°F)	0.5 V
F7A-38 (TEA) - F7A-39 (SGA)	-	Input No. 1 cooler thermistor	Ignition switch ON Evaporator temperature: 25°C (77°F)	1.6 V
F7A-39 (SGA) - Body ground	-	Ground for No. 1 cooler thermistor	Always	Below 1 V
F7A-40 (BLW) - F72-29 (GND)	-	Output for driving Blower motor	Ignition switch ON Blower switch: Lo	Pulse generation (See waveform 9)

*1: w/ Ion Generator
*2: w/ PTC Heater

(a) Waveform 1:

Item	Content
Terminal No.	F72-3 (LIN1) - F72-29 (GND)
Tool Setting	2 V/DIV., 20 ms./DIV.
Vehicle Condition	Ignition switch ON

(b) Waveform 2:

Item	Content
Terminal No.	F72-15 (SOL-) - F72-29 (GND)
Tool Setting	5 V/DIV., 1 ms./DIV.
Vehicle Condition	Engine running Blower switch: Lo A/C switch: On

Item	Content
Terminal No.	F7A-2 (B2AI) - Body ground
	F7A-3 (A2AI) - Body ground
	F7A-9 (A1AI) - Body ground
	F7A-10 (B1AI) - Body ground
Tool Setting	2 V/DIV., 10 ms./DIV.
Vehicle Condition	Ignition switch ON No. 1 blower damper servo sub-assembly (fresh/recirculation) operating

(d) Waveform 4:

Item	Content
Terminal No.	F7A-4 (A2AO) - Body ground
	F7A-6 (B2AO) - Body ground
	F7A-8 (B1AO) - Body ground
	F7A-16 (A1AO) - Body ground
Tool Setting	2 V/DIV., 10 ms./DIV.
Vehicle Condition	Ignition switch ON No. 2 air conditioning radiator damper servo sub-assembly (mode switching) operating

(e) Waveform 5:

Item	Content
Terminal No.	F7A-18 (B2LL) - Body ground
	F7A-20 (A1LL) - Body ground
	F7A-35 (B1LL) - Body ground
	F7A-37 (A2LL) - Body ground
Tool Setting	2 V/DIV., 10 ms./DIV.
Vehicle Condition	Ignition switch ON No. 1 air conditioning radiator damper servo sub-assembly (driver side lower air mix) operating

(f) Waveform 6:

Item	Content
Terminal No.	F7A-19 (B1LU) - Body ground
	F7A-30 (A2LU) - Body ground
	F7A-31 (B2LU) - Body ground
	F7A-36 (A1LU) - Body ground
Tool Setting	2 V/DIV., 10 ms./DIV.
Vehicle Condition	Ignition switch ON No. 1 air conditioning radiator damper servo sub-assembly (driver side upper air mix) operating

(g) Waveform 7:

Item	Content
Terminal No.	F7A-23 (A2RL) - Body ground
	F7A-25 (B2RL) - Body ground
	F7A-26 (B1RL) - Body ground
	F7A-28 (A1RL) - Body ground
Tool Setting	2 V/DIV., 10 ms./DIV.
Vehicle Condition	Ignition switch ON No. 1 air conditioning radiator damper servo sub-assembly (front passenger side lower air mix) operating

(h) Waveform 8:

Item	Content
Terminal No.	F7A-22 (B1RU) - Body ground
	F7A-24 (A1RU) - Body ground
	F7A-27 (A2RU) - Body ground
	F7A-29 (B2RU) - Body ground
Tool Setting	2 V/DIV., 10 ms./DIV.
Vehicle Condition	Ignition switch ON No. 1 air conditioning radiator damper servo sub-assembly (front passenger side upper air mix) operating

(i) Waveform 9:

Item	Content
Terminal No.	F7A-40 (BLW) - F72-29 (GND)
Tool Setting	2 V/DIV., 1 ms./DIV.
Vehicle Condition	Ignition switch ON Blower switch: Lo

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
F61-2 (LIN1) - Body ground	L - Body ground	LIN communication	Ignition switch ON	Pulse generation (See waveform 1)
F61-10 (IG+) - Body ground	BE - Body ground	Power source (IG)	Ignition switch off	Below 1 V
F61-10 (IG+) - Body ground	BE - Body ground	Power source (IG)	Ignition switch ON	11 to 14 V
F61-16 (GND) - Body ground	W-B - Body ground	Ground for air conditioning control assembly	Always	Below 1 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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