Diagnosis & Repair
For wiring diagram, see DTC P0440: EVAP SYSTEM MALFUNCTION & DTC P0442: EVAP SYSTEM MALFUNCTION . For diagnosis and repair, see Fig 1. To check ECM inputs and outputs, see PIN VOLTAGE CHARTS article. For removal and installation of components, see REMOVAL & INSTALLATION - 4-CYLINDER article. To identify circuits referenced in testing, See ENGINE PERFORMANCE in SYSTEM WIRING DIAGRAMS article in ELECTRICAL.