Power Steering Oil Pressure Switch

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.

Consult-II Reference Value In Data Monitor Mode:

EC-PST/SW-01:

EC-PST/SW-01 Connector View:

ECM Terminals And Reference Value:

Wiring Diagram

Steps 1 - 3:

Steps 4 - 7:

Diagnostic Procedure

Component Inspection

POWER STEERING OIL PRESSURE SWITCH
1. Turn ignition switch "OFF".







2. Disconnect power steering oil pressure switch harness connector.
3. Start engine.
4. Check continuity between terminal 1 and body ground.
If NG, replace power steering oil pressure switch.