CHECK AT A/C-ECU TERMINALS

Terminal No.	Terminal code	Check item	Check condition	Normal condition
1	HOT	Air mix damper motor (HOT)	When shifting to COOL	1 V or less
			When shifting to HOT	Battery voltage
2	FRE	Motor for air outside/inside air circulation switching damper motor	When moving to the inside air recirculation position
			When moving to the outside air position	1 V or less
3	REC		When moving to the inside air recirculation position
			When moving to the outside air position	Battery voltage
4	RLY	Rear window defogger relay	Refer to GROUP 54A - Rear window defogger .	Refer to GROUP 54A - Rear window defogger .
5	ILL-	Illumination	Lighting switch: "ON"	0 V
6	ILL+			Battery voltage
7	SENG	Mode selection potentiometer and air mixing potentiometer (input)	Mode selection damper motor	0 V
			Air mix damper motor	0 V
8	A/MP	Air mixing potentiometer	MAX COOL	1.15 V <LHD> 1 V <RHD>
9	MODP	Mode selection potentiometer	FACE	4 V <LHD> 1.47 V <RHD>
10	-	-	-	-
11	CANL	Output to the engine-ECU
12	CANH
13	COOL	Air mix damper motor (COOL)	When shifting to COOL	Battery voltage
			When shifting to HOT	1 V or less
14	FACE <LHD> DEF <RHD>	Mode selection damper control motor (FACE <LHD>, DEF<RHD>)	When moving toward FACE <LHD>, DEF <RHD> position	Battery voltage
			When moving toward DEF <LHD>, FACE <RHD> position	1 V or less
15	DEF <LHD> FACE <RHD>	Mode selection damper control motor (DEF <LHD>, FACE <RHD>)	When moving toward FACE <LHD>, DEF <RHD> position
			When moving toward DEF <LHD>, FACE <RHD> position	Battery voltage
16	IND	Rear window defogger	-	-
17	RVM	Power transistor	Air volume adjustment dial: Max.	Battery voltage
18	BASE			0 to 2 V
19	E	Earth	Always	0 V
20	IG2	IG (2) power supply	Ignition switch: "ON"	Battery voltage
21	B/UP	Back-up power supply	Always
22	SENB	Sensor power supply	Ignition switch: "ON"	5 V
23 - 24	-	-	-	-