Throttle Position Sensor: Avalon

WARNING: This page does not describe the selected car, but rather 10 other vehicles, including the 2003 Toyota Tundra, 2003 Toyota Tacoma, 2003 Toyota Sienna, 2003 Toyota Sequoia, and 2003 Toyota Land Cruiser. However, it is still accessible from the selected car via links, so may be relevant.

For throttle position sensor circuit inspection and wiring diagram, see Fig 1-Fig 4 . For circuit identification, see ENGINE PERFORMANCE in appropriate SYSTEM WIRING DIAGRAMS article in ELECTRICAL. To check for intermittent problems, see INTERMITTENTS in TROUBLE SHOOTING - NO CODES article. To replace throttle position sensor, see THROTTLE POSITION SENSOR under ENGINE SENSORS & SWITCHES in REMOVAL & INSTALLATION - V6 & V8. 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 & Wiring Diagram (Avalon)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 2: Testing Throttle Position Sensor - Steps 1-2 (Avalon)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 3: Testing Throttle Position Sensor - Steps 3-5 (Avalon)

Fig 4: Testing Throttle Position Sensor - Step 5 Cont. (Avalon)