Power Steering Oil Pressure Switch Circuit

COMPONENT DESCRIPTION
The power steering oil pressure switch is attached to the power steering high-pressure tube and detects a power steering load. When a power steering load is detected, it signals the ECM. The ECM adjusts the IACV-AAC valve to increase the idle speed and adjust for the increased load.







DIAGNOSTIC CHART

COMPONENT INSPECTION
Power steering oil pressure switch
1. Disconnect power steering oil pressure switch harness connector then start engine.




2. Check continuity between terminals (1) and (2).




If NG, replace power steering oil pressure switch.

IACV-FICD solenoid valve-2 (Power Steering Circuit)
Disconnect IACV-FICD solenoid valve-2 harness connector.




- Check for clicking sound when applying 12V direct current to terminals.




- Check plunger for seizing or sticking.
- Check for broken spring.




WIRING DIAGRAM