Throttle Position Sensor: Prius

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)

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

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

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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)