Power Steering Oil Pressure Switch

Switch is attached to power steering high pressure hose. Signal is used by ECU to help control idle speed. Check voltage at appropriate ECU terminal with engine idling and then measure voltage again while turning steering wheel side to side. See POWER STEERING OIL PRESSURE SWITCH table and WIRING DIAGRAMS articles to identify proper ECU terminal for testing.

Check voltage at appropriate ECU terminal with engine idling and steering wheel in straight ahead then measure voltage again while turning steering wheel side-to-side. See POWER STEERING OIL PRESSURE SWITCH TEST table and WIRING DIAGRAMS article to identify proper ECU terminal for testing.

For diagnosing power steering oil pressure switch system, see appropriate POWER STEERING OIL PRESSURE SWITCH diagnostic chart. Use DIAGNOSTIC CHARTS DIRECTORY table at beginning of this article to locate chart.