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: IG2
5 V
2
ILO-
-
-
-
3
HTR3
4
HTR2
5
HTR1
6 - 11
-
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 - 16
-
-
-
-
17
SENG
Sensor earth
Always
1 V or less
18
E
Earth
19
B/UP
Battery power supply
System voltage
20
IG1
IG power supply
Ignition switch: ON
21
P/TC
Power transistor (DRAIN)
Air volume control dial: Maximum air volume
0 to 2 V
22
ILL+
-
-
-
23
ILO+
24
ILL-
25
P/TB
Power transistor (GATE)
Air volume control dial: Maximum air volume
System voltage
26 - 30
-
-
-
-
31
CANL
32
CANH
41
IG1
Motor power supply
Ignition switch: ON
System voltage
42
A/PB’
Air mixing damper control motor*1 or Air mixing damper control motor (RH)*2
-
-
43
A/PA’
44
A/PB
45
A/PA
46
A/DB’
Air mixing damper control motor (LH)*2
47
A/DA’
48
A/DB
49
A/DA
50
+
Fin thermo sensor
Sensor probe temperature: 25°C (4.0 kΩ)
2.1 to 2.7 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
1 V or less
note
  • *1: SINGLE-ZONE AUTO A/C.
  • *2: DUAL-ZONE AUTO A/C.