AIR CONDITIONING SYSTEM > TERMINALS OF ECU

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AIR CONDITIONING AMPLIFIER ASSEMBLY

E124486E72

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
H85-1 (IG+) - H85-14 (GND)
B - W-B
Power source (IG)
Power switch on (IG)
11 to 14 V
Power switch off
Below 1 V
H85-5 (TAM) - H85-13 (SG-2)
BE - G
Ambient temperature sensor signal
Power switch on (IG)
Ambient temperature: 25°C (77°F)
1.35 to 1.75 V
Power switch on (IG)
Ambient temperature: 40°C (104°F)
0.9 to 1.2 V
H85-9 (PRE) - H85-13 (SG-2)
L - G
A/C pressure sensor signal
A/C system operating, Refrigerant pressure: Abnormal pressure (more than 3140 kPa (32.0 kgf/cm2, 455 psi))
4.88 V or higher
A/C system operating, Refrigerant pressure: Abnormal pressure (less than 196 kPa (2.0 kgf/cm2, 28 psi))
Below 0.65 V
A/C system operating, Refrigerant pressure: Normal pressure (less than 3140 kPa (32.0 kgf/cm2, 455 psi) and more than 196 kPa (2.0 kgf/cm2, 28 psi))
0.65 to 4.88 V
H85-10 (S5-3) - H85-13 (SG-2)
B - G
Power supply for A/C pressure sensor
Power switch on (IG)
A/C switch: on
4.75 to 5.25 V
Power switch on (IG)
A/C switch: off
Below 1 V
H85-11 (CANH) - H85-12 (CANL)
Y - BR
CAN communication system
CAN communication circuit
Pulse generation
H85-13 (SG-2) - Body ground
G - Body ground
Ground for A/C pressure sensor, ambient temperature sensor
Always
Below 1 V
H85-14 (GND) - Body ground
W-B - Body ground
Ground for main power supply
Always
Below 1 V
H85-15 (ECON) - H85-14 (GND)
R - W-B
Combination switch (ECO switch) signal
Power switch on (IG)
Combination switch (ECO switch) off
11 to 14 V
Power switch on (IG)
Combination switch (ECO switch) on
Below 1 V
H85-16 (PTC3) - H85-14 (GND)*2
BR - W-B
PTC heater operation signal
Engine is running (1250 rpm or higher)
Temperature setting: MAX. HOT
Ambient temperature: 10°C (50°F) or lower
Engine coolant temperature: 65°C (149°F) or lower
Light control switch off
Blower switch on
11 to 14 V
H85-18 (PTC1) - H85-14 (GND)*2
W - W-B
PTC heater operation signal
Engine is running (1250 rpm or higher)
Temperature setting: MAX. HOT
Ambient temperature: 10°C (50°F) or lower
Engine coolant temperature: 75°C (167°F) or lower
Light control switch off
Blower switch on
11 to 14 V
H85-21 (B) - H85-14 (GND)
Y - W-B
Power source (Back-up)
Power switch off
11 to 14 V
H85-23 (BLW) - H85-14 (GND)
W - W-B
Blower motor speed control signal
Power switch on (IG)
Blower switch: LO
Pulse generation
(See waveform 1)
H85-28 (RH) - H85-14 (GND)*1
LG - W-B
Glass humidity sensor signal
Power switch on (IG)
Humidity: 40%
Cabin temperature: 25°C (77°F)
2.09 V
Power switch on (IG)
Humidity: 60%
Cabin temperature: 25°C (77°F)
2.81 V
H85-29 (TR) - H85-34 (SG-1)
B - W
Room temperature sensor signal
Power switch on (IG)
Cabin temperature: 25°C (77°F)
1.8 to 2.2 V
Power switch on (IG)
Cabin temperature: 40°C (104°F)
1.2 to 1.6 V
H85-31 (S5-4) - H85-14 (GND)*1
V - W-B
Power supply for glass humidity sensor
Power switch off
Below 1 V
Power switch on (IG)
4.5 to 5.5 V
H85-32 (TSP) - H85-14 (GND)
BR - W-B
Solar sensor signal (for front passenger side)
Power switch on (IG)
Solar sensor subjected to electric light
0.8 to 4.3 V
Power switch on (IG)
Solar sensor covered with a cloth
Below 0.8 V
H85-33 (TSD) - H85-14 (GND)
B - W-B
Solar sensor signal (for driver side)
Power switch on (IG)
Solar sensor subjected to electric light
0.8 to 4.3 V
Power switch on (IG)
Solar sensor covered with a cloth
Below 0.8 V
H85-34 (SG-1) - Body ground
W - Body ground
Ground for room temperature sensor
Always
Below 1 V
H85-35 (SG-4) - Body ground
W - Body ground
Ground for combination switch assembly (ECO switch)
Always
Below 1 V
H85-37 (LIN1) - H85-14 (GND)
V - W-B
LIN communication signal
Power switch on (IG)
Pulse generation
H85-38 (PTC2) - H85-14 (GND)*2
B - W-B
PTC heater operation signal
Engine is running (1250 rpm or higher)
Temperature setting: MAX. HOT
Ambient temperature: 10°C (50°F) or lower
Engine coolant temperature: 65°C (149°F) to 70°C (158°F)
Light control switch off
Blower switch on
11 to 14 V
H86-7 (LBLO) - Body ground*1
BR - Body ground
Ground for air conditioning thermistor assembly
Always
Below 1 V
H86-15 (TFG) - H85-14 (GND)*1
GR - W-B
Glass temperature signal
Power switch on (IG)
Glass temperature: 25°C (77°F)
2.200 kΩ
H86-16 (TNG) - H85-14 (GND)*1
SB - W-B
Glass surroundings signal
Power switch on (IG)
Glass temperature: 25°C (77°F)
2.200 kΩ
z1-2 (BUS G) - Body ground
-
Ground for BUS IC
Always
Below 1 V
z1-3 (BUS) - z1-2 (BUS G)
-
BUS IC control signal
Power switch on (IG)
Pulse generation
z1-4 (B BUS) - z1-2 (BUS G)
-
Power supply for BUS IC
Power switch off
11 to 14 V
z1-5 (SGA) - Body ground
-
Ground for evaporator temperature sensor
Always
Below 1 V
z1-6 (TEA) - z1-5 (SGA)
-
A/C evaporator temperature sensor signal
Power switch on (IG)
Evaporator temperature: 0°C (32°F)
2.0 to 2.4 V
Power switch on (IG)
Evaporator temperature: 15°C (59°F)
1.4 to 1.8 V
  1. *1: w/ Air Conditioning Thermistor Assembly
  2. *2: w/ PTC Heater Assembly


    E103396E01

  1. Waveform 1:
    Item
    		Content
    Terminal No.
    		H85-23 (BLW) - H85-14 (GND)
    Tool Setting
    		1 V/DIV., 500 μs/DIV.
    Vehicle Condition
    		Power switch on (IG)
    Blower switch: LO


CENTER CLUSTER MODULE CIRCUIT (AIR CONDITIONING CONTROL ASSEMBLY)

E222709E02

HINT:
Check from the rear of the connector while it is connected to the center cluster module circuit (air conditioning control assembly).


Terminal No.
(Symbol)
Wiring Color
Terminal Description
Condition
Specified Condition
H80-1 (ACC) - Body ground
V - Body ground
Power source (ACC)
Power switch on (ACC)
11 to 14 V
Power switch off
Below 1 V
H80-2 (IG+) - Body ground
B - Body ground
Power source (IG)
Power switch on (IG)
11 to 14 V
Power switch off
Below 1 V
H80-4 (+B) - Body ground
R - Body ground
Power source (Back-up)
Power switch off
11 to 14 V
H80-6 (ILL+) - Body ground
G - Body ground
Light control switch signal
Light control switch tail or head position
11 to 14 V
Light control switch off
Below 1 V
H80-11 (LIN1) - Body ground
V - Body ground
LIN communication signal
Power switch on (IG)
Pulse generation
H80-16 (GND) - Body ground
W-B - Body ground
Ground for center cluster module circuit (air conditioning control assembly)
Always
Below 1 V

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