Odyssey LX V6-3.5L (2000)
Oil Pressure Warning Lamp/Indicator: Description and Operation
How the Circuit Works
The low oil pressure indicator works in two ways: it flashes continuously following a momentary loss of pressure, or it goes on and stays on with a
complete loss of engine oil pressure.
When the engine first starts, before its oil pressure rises above 4.3 psi, voltage is applied to the closed and grounded engine oil pressure switch, and the
light comes on to test the bulb.
With the engine running, voltage is applied at the WHT/BLU wire of the driver's multiplex control unit. With normal engine oil pressure, the engine oil
pressure switch is open and the low oil pressure indicator does not come on. If the engine oil pressure switch closes momentarily (more than 0.5 second)
but then opens again, the YEL/RED wire at the driver's multiplex control unit will sense ground through the switch. The driver's multiplex control unit
will then provide and remove ground for the low oil pressure indicator through the YEL/RED wire. The light will flash on and off until you turn the
ignition switch off. The flashing feature will not work until 30 seconds after initial voltage is applied to the WHT/BLU wire of the oil pressure indicator
flasher circuit. This delay keeps the low oil pressure indicator from coming on during engine warm-up.
If engine oil pressure falls below 10 psi and does not increase, the engine oil pressure switch will stay closed. The low oil pressure indicator will then
come on and stay on.
