Climate Control System Description (With Climate Control)

Climate Control System Description

The air conditioning system removes heat from the passenger compartment by circulating refrigerant through the system.

This vehicle uses HFC-134a (R-134a) refrigerant, which does not contain chlorofluorocarbons. Pay attention to the following service items:

Do not mix refrigerants CFC-12 (R-12) and HFC-134a (R-134a). They are not compatible.
Use only the recommended polyalkyleneglycol (PAG) refrigerant oil (SANDEN SP-10) designed for the R-134a A/C compressor. Intermixing the recommended (PAG) refrigerant oil with any other refrigerant oil will result in A/C compressor failure.
All A/C system parts (A/C compressor, discharge line, suction line, evaporator, A/C condenser, receiver/dryer, expansion valve, O-rings for joints) are designed for refrigerant R-134a. Do not exchange with R-12 parts.
Use a halogen gas leak detector designed for refrigerant R-134a.
R-12 and R-134a refrigerant servicing equipment are not interchangeable. Use only a recovery/recycling/charging station that is U.L.-listed and is certified to meet the requirements of SAE J2210 to service the R-134a air conditioning systems.
Always recover refrigerant R-134a with an approved recovery/recycling/charging station before disconnecting any A/C fitting.

Oil Separator

Oil emission from the A/C compressor to the A/C line is reduced by placing the oil separator in the A/C compressor. This results in a thinner oil film inside of the heat exchanger (A/C condenser and evaporator). Air conditioning efficiency is increased without sacrificing engine performance.

A/C Pressure Sensor

The A/C pressure sensor converts A/C pressure into electrical signals to the ECM/PCM.

The response of the A/C pressure sensor is shown in the graph.

Climate Control Door Positions

Climate Control Unit Inputs and Outputs

Cavity Wire color Signal
1 GRY ILLUMI (+) INPUT
2 BRN^*1 GRY^*2 REAR WINDOW DEFOGGER RELAY INPUT
3 LT GRN^*1 PUR^*2 IG2 (Power) INPUT
4 ——— ——— ———
5 BLK GROUND (G504) OUTPUT
6 BRN^*1 BLU^*2 A/C SIGNAL OUTPUT
7 BLK CONTROL MOTOR COMMON POTENTIAL +5 V OUTPUT
8 BRN EVAPORATOR TEMPERATURE SENSOR OUTPUT
9 LT BLU AIR MIX COOL OUTPUT
10 WHT MODE VENT OUTPUT
11 PNK AIR MIX HOT OUTPUT
12 GRN MODE DEF OUTPUT
13 YEL POWER TRANSISTOR CONTROL OUTPUT
14 BLU BLOWER FEEDBACK INPUT
15 ORN RECIRCULATE OUTPUT
16 PUR^*1 RED^*2 FRESH OUTPUT
17 RED ILLUMI (-) OUTPUT
18 ——— ——— ———
19 RED SENSOR COMMON GROUND INPUT
20 BLU MODE 4 OUTPUT
21 PUR MODE 3 OUTPUT
22 LT GRN MODE 2 OUTPUT
23 ORN MODE 1 OUTPUT
24 PUR SUNLIGHT SENSOR OUTPUT
25 BLU^*1 PUR^*2 OUTSIDE AIR TEMPERATURE SENSOR OUTPUT
26 LT BLU IN-CAR TEMPERATURE SENSOR OUTPUT
27 GRY AIR MIX POTENTIAL OUTPUT
28 ——— ——— ———
29 ——— ——— ———
30 ——— ——— ———
31 YEL RECIRCULATION POTENTIAL OUTPUT
32 PNK B-CAN INPUT/OUTPUT

Cavity	Wire color	Signal
1	GRY	ILLUMI (+)	INPUT
2	BRN^1 GRY^2	REAR WINDOW DEFOGGER RELAY	INPUT
3	LT GRN^1 PUR^2	IG2 (Power)	INPUT
4	———	———	———
5	BLK	GROUND (G504)	OUTPUT
6	BRN^1 BLU^2	A/C SIGNAL	OUTPUT
7	BLK	CONTROL MOTOR COMMON POTENTIAL +5 V	OUTPUT
8	BRN	EVAPORATOR TEMPERATURE SENSOR	OUTPUT
9	LT BLU	AIR MIX COOL	OUTPUT
10	WHT	MODE VENT	OUTPUT
11	PNK	AIR MIX HOT	OUTPUT
12	GRN	MODE DEF	OUTPUT
13	YEL	POWER TRANSISTOR CONTROL	OUTPUT
14	BLU	BLOWER FEEDBACK	INPUT
15	ORN	RECIRCULATE	OUTPUT
16	PUR^1 RED^2	FRESH	OUTPUT
17	RED	ILLUMI (-)	OUTPUT
18	———	———	———
19	RED	SENSOR COMMON GROUND	INPUT
20	BLU	MODE 4	OUTPUT
21	PUR	MODE 3	OUTPUT
22	LT GRN	MODE 2	OUTPUT
23	ORN	MODE 1	OUTPUT
24	PUR	SUNLIGHT SENSOR	OUTPUT
25	BLU^1 PUR^2	OUTSIDE AIR TEMPERATURE SENSOR	OUTPUT
26	LT BLU	IN-CAR TEMPERATURE SENSOR	OUTPUT
27	GRY	AIR MIX POTENTIAL	OUTPUT
28	———	———	———
29	———	———	———
30	———	———	———
31	YEL	RECIRCULATION POTENTIAL	OUTPUT
32	PNK	B-CAN	INPUT/OUTPUT

*1: LHD type
*2: RHD type