Component Functional Description - Oil Pump Solenoid
The mechanical Engine Oil Pump operates in two pressure modes described below. The Powertrain Control Module (PCM) switches the pump between modes based on the oil temperature, coolant temperature, and engine operating conditions.
- Low Mode: To operate the pump in low mode the PCM commands the High Side Driver (HSD) control on, energizing the Oil Pump Solenoid. The Engine Oil Pump is operated in low mode between idle and approximately 2800 RPM.
- High Mode: To operate the pump in high mode the PCM commands the HSD control off, de-energizing the Oil Pump Solenoid. The PCM will typically switch the pump from low to high mode when the engine speed increases over approximately 2800 to 3000 RPM.
See the oil pressure specifications in the table below:
| 2.0L GMET 4 (MULTIAIR ENGINE) OIL PRESSURE SPECIFICATIONS | |||
|---|---|---|---|
| ENGINE SPEED | OIL PUMP MODE | Oil Pressure Range with Mechanical Gauge | Oil Pressure Range Displayed in WiTech |
| Idle Speed (750 RPM) | Low Pressure Mode (Solenoid on) | 80 - 160 kPa (11.6 - 23.2 psi) | 180 - 260 kPa (26.1 - 37.7 psi) |
| 1000 RPM - 2800 RPM | Low Pressure Mode (Solenoid on) | 110 - 200 kPa (16 - 29 psi) | 210 - 300 kPa (30.5 - 43.5 psi) |
| 3000 RPM - 5800 RPM | High Pressure Mode (Solenoid off) | 310 - 390 kPa (45 - 56.5 psi) | 410 - 490 kPa (59.5 - 71 psi) |