Throttle Position Sensor: 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 of throttle position sensor, see Fig 1-Fig 6 . 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 Throttle Position Sensor - Circuit Description (Prius)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 2: Testing Throttle Position Sensor - Wiring Diagram (Prius)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 3: Testing Throttle Position Sensor Using Toyota Hand-Held Tester - Steps 1-2 (Prius)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 4: Testing Throttle Position Sensor Using Toyota Hand-Held Tester - Steps 3-4 (Prius)

Fig 5: Testing Throttle Position Sensor Using OBD II Scan Tool - Steps 1-2 (Prius)

Fig 6: Testing Throttle Position Sensor Using OBD II Scan Tool - Step 3 (Prius)