Low Oil Pressure Switch

WARNING: This page is about a different car, the 2003 Lexus RX 300 and 2002 Lexus RX 300. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Oil pressure should be over 3.55 psi (0.25 kgs/cm² , 24.5 kPa).

Disconnect the connector from the switch.
Check that continuity exists between terminal and ground with the engine stopped. See Fig 1.
Check that no continuity exists between terminal and ground with the engine running.
If operation is not as specified, replace the switch.
- If replacing switch, apply adhesive to 2 or 3 threads of the new oil pressure switch before installing and torque to 9 ft.lbs. (13 N.m).

Fig 1: Inspecting Low Oil Pressure Switch Continuity