Oil Pressure Low

Oil Pressure Low Message:

Oil Pressure Sensor Circuit:

DESCRIPTION:

The BCM provides voltage to the oil pressure circuit, and the oil pressure sensor provides the single path to ground. The BCM supplies and internally monitors the voltage level of the circuit at pin 3D9. The sensor acts like a variable resistor, when the oil pressure is high, resistance is high, and the BCM will detects high voltage. As the oil pressure decreases so will the voltage level sensed by the BCM at pin 3D9. The BCM will then calculate the oil pressure by the amount of voltage present, and when the calculated oil pressure drops below 6.0 psi, and all other failure conditions have been met, the BCM will send the "LOW OIL PRESSURE" message to the CRT. The BCM will also illuminate the "OIL PRESSURE" telltale on the IPC.

TEST CONDITIONS:

Engine has been running for at least 5.0 seconds.

FAILURE CONDITIONS:

1. Oil pressure less than 6.0 psi.
2. Engine speed greater than 600 rpm.
3. Above failure conditions present for at least X seconds.
4. Code B334 is set.

ACTION TAKEN:

1. Display the "LOW OIL PRESSURE" message on the CRT.
2. Illuminate "OIL PRESSURE" telltale on IPC.