Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

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Power Steering Pressure Switch: Testing and Inspection




POWER STEERING PRESSURE SWITCH
The power steering oil pressure switch senses the power steering load and inputs it to PCM, which then adjusts the idle speed control motor to maintain idle speed when the power steering pump puts a load on the engine.

Circuit Diagram:






Using Hi-Scan:






Harness Inspection: