Spectra GSX L4-1.8L (2000)
Throttle Position Sensor: Testing and Inspection
1. Disconnect connector from throttle position sensor.
2. Connect ohmmeter between sensor terminals 1 and 3.
3. Verify that resistance increases linearly according to throttle angle.
Specification: 2kohms±0.4kohms
(with throttle valve closed)
4. If resistance is not as specified, replace the throttle position sensor.
5. Connect throttle position sensor connector.
Voltage Inspection
1. Verify that throttle is at the closed throttle position.
2. Turn ignition switch ON (engine OFF).
3. Connect voltmeter between terminals 2 (BLU/WHT wire) and 2 (GRN/YEL wire) on throttle position sensor connector. Check for 5V reference
voltage.
4. Connect the voltmeter between terminal 1 (BLK/GRN) and terminal 3 (BLU/ORG) on the TPS connector.
5. Measure the voltage at the fully open and fully closed position.
6. If not as specified, replace throttle position sensor.
