3000GT VR-4 AWD V6-2972cc 3.0L DOHC MFI Twin Turbo (1998)
Power Steering Pressure Switch: Description and Operation
OPERATION
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The power steering pressure switch converts presence/absence of power steering load into low/nigh voltage and inputs it to the engine control
module, which then controls the idle air control motor based on this signal.
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The battery voltage in the engine control module is applied through a resistor to the power steering pressure switch. Steering operation causes the
power steering oil pressure to increase, turning the switch on. As a result, continuity is produced between the battery voltage applied and ground.
This causes the power steering pressure terminal voltage to go from high to low.
