LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Toyota >> 1990 >> Pickup Base, 22-RE >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests - 4-CYL EFI >> Emission: PCV System >> Overview
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Emission: PCV System: Overview

To reduce HC emissions, crankcase blow-by gas (HC) is routed through the PCV valve to the intake manifold for combustion in the cylinders.

Fig 1: Overview Of Entire PCV System
G50G14502Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fig 2: Operation Of PCV Valve Under Different Circumstances
G50H14503Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002