Operation CHARM: Car repair manuals for everyone.

Steering: Description and Operation

Power Steering








System View-3.0L 2V Engine (CII Pump)

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System View-3.0L 4V Engine (CIII Pump)








Steering Gear (Typical)





Power Steering Pump (CII)





Power Steering Pump (CIII)

Power Steering Pressure (PSP) Switch (3.0L 4V Only)
A power steering pressure (PSP) switch is located on the power steering pressure hose. It sends a signal to the powertrain control module (PCM) to increase idle speed for idling stability when power steering pump pressure increases above the set pressure value.