Rodeo (4WD) V6-3165cc 3.2L SOHC (6VD1) (1993)
Power Steering Pressure Switch: Testing and Inspection
PSP Switch Circuit
Chart C-1E PSP Switch Circuit
Circuit Description
The Power Steering Pressure (PSP) Switch is normally open to ground, and GRN/YEL wire will be near the battery positive voltage. Turning the
steering wheel increases power steering oil pressure and its load on an idling engine. The pressure switch will close before the load can cause an idle
problem. Closing the switch causes GRN/YEL wire to read less than I volt. The Engine Control Module (ECM) will increase the idle air rate and
disengage the air conditioning relay.
^ A pressure switch that will not close, or an open GRN/YEL wire, may cause the engine to stop, when power steering loads are high.
^ A switch that will not open or a GRN/YEL wire shorted to ground, may affect idle quality and will cause the air conditioning relay to be