Inspect Oil Pressure In Oil Pump

WARNING: This page is about a different car, the 2002 Toyota Prius. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Do the test at normal operating oil temperature 50 - 80 °C (122 - 176 °F).

Lift up the vehicle.
Remove the test plug and install SST. SST 09992-00095 (09992-00112, 09992-00271).

Fig 1: Testing Transaxle Oil Pump Pressure
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Turn the blower dial to Hl.

Fig 2: Locating Max Button, Blower Dial & Identifying Dial Positions
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Press the MAX switch to START and start the engine.
Keeping the engine speed of 1,200 RPM, measure the oil pressure.
Oil pressure: 9.8 kPa (0.1 kgf/cm2, 1.4 psi) or more.