A/C Pressure Sensor
- A/C pressure sensor may also be referred to as A/C pressure transducer. A/C pressure transducer is located on A/C refrigerant line between filter-drier and expansion valve in right rear corner of engine compartment. See Fig 1.
- Ensure work area around A/C pressure sensor is not less than 50°F (10°C) when testing A/C pressure sensor. Ensure electrical connector at A/C pressure sensor is clean and properly connected.
- Apply parking brake. Ensure shift lever is in Park or Neutral. Start engine and allow engine to idle. Connect scan tool to Data Link Connector (DLC). DLC is located below driver's side of instrument panel. See Figure.
- Go to main menu on scan tool. Select STAND ALONE on scan tool, and then select 2001 or 2002 DIAGNOSTICS. Select CLIMATE CONTROL and then SENSOR DISPLAY. Select A/C HIGH SIDE VOLTS on scan tool and note voltage display.
- For A/C system operation, a voltage between .451 volt (low-pressure cutout) to 4.519 volts (high-pressure cutout) is required. Using displayed voltage, determine if A/C pressure sensor operates correctly. See A/C PRESSURE SENSOR SPECIFICATIONS table. Replace A/C pressure sensor if defective.
A/C PRESSURE SENSOR SPECIFICATIONS
| Voltage Displayed | Operating Condition |
|---|---|
| 0 | A/C Pressure Sensor Faulty, Or No Voltage From Powertrain Control Module |
| .150-.450 | A/C Pressure Sensor Low-Pressure Cutout Operating Correctly |
| .451-4.519 | Normal Operating Condition |
| 4.520-4.850 | A/C Pressure Sensor High-Pressure Cutout Operating Correctly |
| 5.0 | A/C Pressure Sensor Faulty/Open Circuit |