Power Steering Pressure Switch: Testing and Inspection

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.

Terminal 39:

ECM TERMINALS AND REFERENCE VALUE
Specification data are reference values and are measured between each terminal and 32 (ECM ground).








WIRING DIAGRAM

1 Of 7 / Inspection Start:

2 Of 7 / Check Overall Function:

3 Of 7 / Check Overall Function:

4 Of 7 / Check Ground Circuit:

5 Of 7 / Check Input Signal Circuit:

6 Of 7 / Check Power Steering Oil Pressure Switch:

7 Of 7 / Check Intermittent Incident:

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.