Power Steering Pressure Switch: Description and Operation

Power Steering Load Switch:

PURPOSE
Closes to inform the ECM when power steering load is high.

LOCATION
On the P/S pump.

OPERATION
The power steering pressure switch signals the ECM when the vehicle is in need of power steering assist. The turning of the steering wheel causes increased power steering fluid pressure which will close the power steering pressure switch. This sends a signal to the ECM to tell the IAC solenoid valve to raise the idle speed before the load can cause an idle problem.