Power Steering Pressure Signal: Description and Operation

This signal is sent from the power steering pressure switch. The power Steering pressure switch is installed on the power steering pump body.

The switch turns ON when the oil pressure is higher than 15 - 20 kg/cm2 (215 - 285 psi).

The turning of the steering wheel causes increased oil pressure.
ECM uses it as one of the signals for controlling idle air control valve operation.