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

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

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Power Steering Pressure Switch: Description and Operation

PURPOSE/OPERATION
This contact type switch detects the power steering load. If the power steering pump increases the pressure as the steering system is operated, the power steering pressure switch inputs an ON signal to engine control module. According to this signal the engine control module adjusts the idle to prevent the power steering load from slowing it too much.