Celica (VIN "Y")

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.

For testing of throttle position sensor, see Fig 1-Fig 7. 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 (Celica VIN Y)

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Fig 2: Testing Throttle Position Sensor - Wiring Diagram (Celica VIN Y)

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

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

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Fig 5: Testing Throttle Position Sensor Using Toyota Hand-Held Tester - Step 5; Using OBD II Scan Tool - Step 1 (Celica VIN Y)

Fig 6: Testing Throttle Position Sensor Using OBD II Scan Tool - Steps 2-3 (Celica VIN Y)

Fig 7: Testing Throttle Position Sensor Using OBD II Scan Tool - Step 4 (Celica VIN Y)