For 1990-2009 cars

Perform the following tests first, in order to eliminate any possible misdiagnosis:

Insufficient cooling may be caused by one of several components or system, such as the following components and systems:

• | The A/C compressor

• | The refrigeration system

• | The air delivery system

• | The PCM

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
DEFINITION: There is insufficient cooling in the passenger compartment.
1 | Perform the On-Board Diagnostic Stystem Check. Refer to Powertrain On Board Diagnostic (OBD) System Check . Are there any stored Diagnostic Trouble Codes (DTCs)? | -- | Go to Step 2 | Go to Step 3
2 | Repair the system that is related to the DTC. Refer to Engine Controls. Is the repair complete? | -- | System OK | --
3 |

1. Open the doors and the hood in order to neutralize the vehicle internal temperature with the shop temperature.
2. Install the J 39500-B ACR4 Station onto the vehicle.
3. Test the low-side system static pressure.

Is the low-side system static pressure below 310 kPa (45 psi)?

--

Go to Step 5

Go to Step 4

4 | If the low side system static pressure is above 310 kPa (45 psi), perform the A/C System Performance Test. Refer to System Performance Test . Is the repair complete? | -- | System OK | --
5 |

1. Perform a leak test on the system. Refer to Leak Testing .
2. Perform any necessary repairs.
3. Evacuate and charge the system.
4. Perform the A/C System Performance Test. Refer to System Performance Test .

Is the repair complete?

--

System OK

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