Power Steering Oil Pressure Switch Circuit

WIRING DIAGRAM




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-FICD solenoid valve to increase the idle speed and adjust for the increased load




CONSULT REFERENCE VALUE IN DATA MONITOR MODE
Specification data are reference values.




ECM TERMINALS AND REFERENCE VALUE
Specification data are reference values, and are measured between each terminal and 128 (ECM ground).

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DIAGNOSTIC PROCEDURE

COMPONENT INSPECTION




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




2. Check continuity between terminals 01 and 02
If NG, replace power steering oil pressure switch.

IACV-FICD solenoid valve
Disconnect IACV-FICD solenoid valve harness connector.




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




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