Vacuum Sensor For Hydrocarbon Absorber Catalyst System: Prius

WARNING: This page does not describe the selected car, but rather 11 other vehicles, including the 2003 Toyota Tacoma, 2003 Toyota RAV4, 2003 Toyota Prius, 2003 Toyota Matrix, and 2003 Toyota MR2. However, it is still accessible from the selected car via links, so may be relevant.

WARNING: On Prius, read service precautions before proceeding with service procedure. See SERVICE PRECAUTIONS .

For testing procedures of vacuum sensor for hydrocarbon absorber catalyst system, see Fig 1-Fig 4 . To check for intermittent problems, see INTERMITTENTS in TROUBLE SHOOTING - NO CODES article. Before replacing ECM, check ECM connectors and ground circuits. See ENGINE CONTROL MODULE POWER & GROUND CIRCUITS under COMPUTERIZED ENGINE CONTROLS.

Fig 1: Testing Vacuum Sensor For Hydrocarbon Absorber Catalyst System - Wiring Diagram & Test Introduction (Prius)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 2: Testing Vacuum Sensor For Hydrocarbon Absorber Catalyst System Using Toyota Hand-Held Tester - Steps 1-2 (Prius)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 3: Testing Vacuum Sensor For Hydrocarbon Absorber Catalyst System Using Toyota Hand-Held Tester - Steps 3-4; Using OBD II Scan Tool - Step 1 (Prius)

Fig 4: Testing Vacuum Sensor For Hydrocarbon Absorber Catalyst System Using OBD II Scan Tool - Step 1 Cont. & Steps 2-3 (Prius)