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 
GRY ILLUMI (+) INPUT 
BRN*1 GRY*2 REAR WINDOW DEFOGGER RELAY INPUT 
LT GRN*1 PUR*2 IG2 (Power) INPUT 
——— ——— ——— 
BLK GROUND (G504) OUTPUT 
BRN*1 BLU*2 A/C SIGNAL OUTPUT 
BLK CONTROL MOTOR COMMON POTENTIAL +5 V OUTPUT 
BRN EVAPORATOR TEMPERATURE SENSOR OUTPUT 
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