Vacuum Diagrams: Introduction

This article contains example underhood views or schematics of vacuum hose routing. Use these vacuum diagrams as a guide during visual inspection.

NOTE: Specific vacuum diagrams are not available for Axiom, Rodeo & Rodeo Sport. Use underhood emission application label to identify correct emission system applications. This will assist in identifying improperly routed vacuum hoses which may cause driveability and/or computer-indicated malfunctions.

Fig 1: Emission Hose Routing Diagram (Ascender 4.2L)

Courtesy of ISUZU MOTOR CO.

Fig 2: Emission Hose Routing Diagram (Ascender 5.3L)

Courtesy of ISUZU MOTOR CO.

Fig 3: Evaporative Emissions (EVAP) Hose Routing Diagram (Ascender 4.2L & 5.3L)

Courtesy of ISUZU MOTOR CO.