Check At A/C-Ecu Terminal

WARNING: This page is about a different car, the 2008 Mitsubishi Lancer. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Identifying C-22 And C-20 A/C-ECU Connector Terminal

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

ECU TERMINAL REFERENCE CHART

Terminal No.	Check item	Check condition	Normal condition
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	Ground	Always	0 V
15	IG1 power supply	Ignition switch: IG1	Battery voltage
16	A/C pressure sensor input	Refer to SIMPLE INSPECTION OF THE A/C PRESSURE SENSOR .	Refer to SIMPLE INSPECTION OF THE A/C PRESSURE SENSOR .
17	Interior temperature sensor	Sensor probe temperature: 25°C (77°F) (4.0 kΩ)	2.1 to 2.7 V
18	-	-	-
19	Sensor ground	Always	0 V
20	A/C pressure sensor power supply	Ignition switch: IG2	5 V
21	Air thermo sensor ground	Always	0 V
22	Air thermo sensor	Sensor probe temperature: 25°C (77°F) (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	-	-