Power Steering Pressure Switch: Testing and Inspection

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-AAC 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 (25) (ECM ground).

1 Of 2:

2 Of 2:

DIAGNOSTIC PROCEDURE





COMPONENT INSPECTION
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
Disconnect IACV-FICD solenoid valve harness connector.





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





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