CHECK AT A/C-ECU TERMINALS





Terminal No.
Check items
Check conditions
Normal conditions
1
Power transistor (DRAIN)
Air volume control dial: Maximum air volume
0 to 2 V
2
Power transistor (GATE)
Air volume control dial: Maximum air volume
Battery voltage
3 - 8
-
-
-
9
A/C control panel (input)
-
-
10
A/C control panel (input)
-
-
11, 12
-
-
-
13
Battery power supply
Always
Battery voltage
14
Earth
Always
0 V
15
IG1 power supply
Ignition switch: IG1
Battery voltage
16
A/C pressure sensor input
Refer to .
Refer to .
17
Interior temperature sensor
Sensor probe temperature: 25°C (4.0 kΩ)
2.1 to 2.7 V
18
Photo sensor input
Brightness 0 lux
5 V
Brightness 100000 lux or more (under summer sunshine)
0 V
19
Sensor earth
Always
0 V
20
A/C pressure sensor power supply
Ignition switch: IG2
5 V
21
Air thermo sensor earth
Always
0 V
22
Air thermo sensor
Sensor probe temperature: 25°C (4.0 kΩ)
2.1 to 2.7 V
23
-
-
-
24
Motor for air outside/inside air circulation switching damper
-
-
25
Motor for air outside/inside air circulation switching damper
-
-
26
Motor for air outside/inside air circulation switching damper
-
-
27
Motor for air outside/inside air circulation switching damper
-
-
28
Air mix damper motor
-
-
29
Motor power supply
-
-
30
Air outlet changeover damper motor
-
-
31
Air outlet changeover damper motor
-
-
32
Air outlet changeover damper motor
-
-
33
Air outlet changeover damper motor
-
-
34
Air mix damper motor
-
-
35
Air mix damper motor
-
-
36
Air mix damper motor
-
-