For 1990-2009 cars

Due to its variable displacement feature, special caution is necessary when diagnosing insufficient cooling conditions with the V-5 compressor. It is normal for liquid refrigerant to collect in the compressor crankcase during extended periods of shutdown, therefore, cooling action may be delayed up to 2 minutes until the refrigerant is pumped from the compressor crankcase.

Perform the following procedure if there is a delay in cooling upon start-up beyond 2 minutes, and the normal service manual operating procedure for the A/C compressor clutch and the electrical engine cooling fan operation has been accomplished:

1. Select the NORM A/C position.
2. Select the high blower position.
3. Ensure that the A/C compressor clutch is engaged.
4. Ensure that the electrical engine is operating.
5. Ensure that the A/C is operating.
6. Idle the engine for 2 minutes.
7. Perform the following procedure if there is no cooling:

7.1. | Operate the engine at approximately 3,000 rotations per minute (RPM) for 1 minute.

7.2. | Ensure that the engine is idling.

7.3. | Select the mode control to the VENT position for 1 minute.

8. Set the A/C system back to NORM A/C mode.
9. Ensure that the A/C system is operating.
10. Run the engine at approximately 3,000 RPM for 1 minute.
11. Perform the following procedure if there is no cooling:

11.1. | Ensure that the A/C system is operating.

11.2. | Drive the vehicle in a normal manner for 5 minutes.

11.3. | Inspect the A/C system for normal operation. If there is no cooling, refer to VDOT Air Conditioning (A/C) System Diagnosis .

#### R-134a Temperature-Pressure Chart

Temperature | Pressure
--- | ---
°C | °F | kPa | psi
-9 | 16 | 106 | 15
-8 | 18 | 115 | 17
-7 | 20 | 124 | 18
-6 | 22 | 134 | 19
-4 | 24 | 144 | 21
-3 | 26 | 155 | 22
-2 | 28 | 166 | 24
-1 | 30 | 177 | 26
0 | 32 | 188 | 27
1 | 34 | 200 | 29
2 | 36 | 212 | 31
3 | 38 | 225 | 33
4 | 40 | 238 | 35
7 | 45 | 272 | 40
10 | 50 | 310 | 45
13 | 55 | 350 | 51
16 | 60 | 392 | 57
18 | 65 | 438 | 64
21 | 70 | 487 | 71
24 | 75 | 540 | 78
27 | 80 | 609 | 88
30 | 85 | 655 | 95
32 | 90 | 718 | 104
35 | 95 | 786 | 114
38 | 100 | 857 | 124
39 | 102 | 887 | 129
40 | 104 | 917 | 133
41 | 106 | 948 | 137
42 | 108 | 980 | 142
43 | 110 | 1012 | 147
44 | 112 | 1045 | 152
46 | 114 | 1079 | 157
47 | 116 | 1114 | 162
48 | 118 | 1149 | 167
49 | 120 | 1185 | 172
50 | 122 | 1222 | 177
51 | 124 | 1260 | 183
52 | 126 | 1298 | 188
53 | 128 | 1337 | 194
54 | 130 | 1377 | 200
57 | 135 | 1481 | 215
60 | 140 | 1590 | 231
63 | 145 | 1704 | 247
66 | 150 | 1823 | 264
68 | 155 | 1948 | 283
71 | 160 | 2079 | 301
74 | 165 | 2215 | 321
77 | 170 | 2358 | 342

• | Evaporator temperature range is -7-10°C (20-50°F).

• | Evaporator pressure range is 124-310 kPa (18-45 psi).

• | Condenser temperature range is 42-74°C (108-165°F).

• | Condenser pressure range is 980-2215 kPa (142-321 psi).