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

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
  • 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
  • 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
  • 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
  • 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

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
  • 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
  • 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
  • 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

(c) Waveform 3:

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

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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