A/C Pressure Sensor
- A/C pressure sensor may also be referred to as A/C pressure transducer. The A/C pressure sensor is located on A/C refrigerant line on firewall, near front of generator. 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). For DLC location, see SELF-DIAGNOSTICS - CARAVAN, TOWN & COUNTRY, & VOYAGER article.
- Go to main menu on scan tool. Select STAND ALONE on scan tool, and then select 1999 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 (PCM) |
| .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 |