CHECK AT A/C-ECU TERMINALS





Terminal No.
Terminal code
Check item
Check condition
Normal condition
1
SENB
A/C pressure sensor power supply
Ignition switch: ON
4.9 to 5.1 V
2

ILO-

Earth to LED night illumination

LED:OFF
1 V or less
LED:ON
Other than above
3
SVLV
Output to the refrigerant solenoid valve relay
Solenoid valve relay: ON
1 V or less
4
-
-
-
-
5
EWPB
Output to the electric water pump relay
Electric water pump relay: ON
1 V or less
6
-
-
-
-
7
-
-
-
-
8
HTR3

Output to the electric PTC heater (1.70 kw)

Electric PTC heater (1.70 kw): ON
Less than 3.1 V
Electric PTC heater (1.70 kw): OFF
Other than above
9

HTR2

Output to the electric PTC heater (0.85 kw)

Electric PTC heater (0.85 kw): ON
Less than 3.1 V
Electric PTC heater (0.85 kw): OFF
Other than above
10

HTR1

Output to the electric PTC heater (1.70 kw)

Electric PTC heater (1.70 kw): ON
Less than 3.1 V
Electric PTC heater (1.70 kw): OFF
Other than above
11
INV
Input from the AC inverter switch
AC inverter switch: ON
1 V or less
AC inverter switch: OFF
System voltage
12
AC/P
A/C pressure sensor input
Refer to
Refer to
13
INC
Interior temperature sensor
Sensor probe temperature: 25°C (4.0 kΩ)
2.1 to 2.7 V
14




15
WTSI
Electric heater inlet water temperature sensor
Temperature at the sensor 25°C (58 kΩ)

1.9 to 2.5 V
16

EWPS

Control signal for electric water pump

Heating: ON
6V or more
Heating: OFF
-
17
SENG
Sensor earth
Always
0 V
18
E
Earth
19
B/UP
Back-up power supply
IOD fuse: ON
System voltage
20
IG1
Power supply to control the PHEV (IGCT)
Ignition switch: ON
System voltage
21
P/TC
Power transistor (DRAIN)
Air volume control dial: Maximum air volume
1 V or less
22

ILL+

Input from night illumination

Night illumination: OFF
1 V or less
Night illumination: ON
System voltage
23

ILO+

Output to LED night illumination

Night illumination: OFF
1 V or less
Night illumination: ON
System voltage
24


-
-
25
P/TB
Power transistor (GATE)
Air volume control dial: Maximum air volume
8 V or more
26
-
-
-
-
27
RRAT
Battery cooling evaporator sensor
Temperature at the sensor: 0°C
(11.36 kΩ)
3.3 to 3.9 V
28
+12V
Power supply to electric heater
Ignition switch: ON
System voltage
29
WTSO
Electric heater outlet water temperature sensor
Temperature at the sensor: 25°C (58 kΩ)
1.9 to 2.5 V
30
-
-
-
-
31
CANL
CANC-L (Middle speed)
-
-
32
CANH
CANC-H (Middle speed)
-
-
41
IG1
Power supply to STEP M
-
System voltage
42
A/PB’
Air mixing damper control motor (front passenger's side)
-
-
43
A/PA’
44
A/PB
45
A/PA
46
A/DB’
Air mixing damper control motor (driver's side)
47
A/DA’
48
A/DB
49
A/DA
50
+
Fin thermo sensor
Sensor probe temperature: 0°C (11.36 kΩ)
3.3 to 3.9 V
51
M/MA
Mode selection damper control motor
-
-
52
M/MB
53
M/MA’
54
M/MB’
55
F/RA
Outside/inside damper control motor
56
F/RB
57
F/RA’
58
F/RB’
59
-

60
-
Fin thermo sensor earth
Always
0 V