Throttle Position Sensor: Testing and Inspection

Throttle position sensor




1. Start engine and warm it up to normal operating temperature.
2. Stop engine (Ignition switch "OFF").
3. Remove the vacuum hose connected to the throttle opener.
4. Connect suitable vacuum hose to the vacuum pump and the opener.
5. Apply vacuum [more than -40.0 kPa (-300 mmHg, -11.81 inHg)] until the throttle drum becomes free from the rod of the throttle opener.







6. Turn ignition switch "ON".

With Consult
7. Select "DATA MONITOR" mode with CONSULT-II.
8. Check voltage of "THRTL POS SEN".
Voltage measurement must be made with throttle position sensor installed in vehicle.
If NG, adjust closed throttle position switch. Refer to "Basic Inspection".
9. If it is impossible to adjust closed throttle position switch in "Basic Inspection", replace throttle position sensor.

OR







Without Consult
7. Check voltage between ECM terminal (63) (Throttle position sensor signal) and ground.
Voltage measurement must be made with throttle position sensor installed in vehicle.
If NG, adjust closed throttle position switch. Refer to "Basic Inspection".

8. If it is impossible to adjust closed throttle position switch in "Basic Inspection", replace throttle position sensor.







Secondary throttle position sensor

WARNING: Before touching the secondary throttle valve, be sure to disconnect the throttle motor harness connector. Failure to do so may cause injury due to accidental actuation of the valve.

1. Turn ignition switch "OFF".
2. Disconnect secondary throttle position sensor harness connector.
3. Disconnect throttle motor harness connector.
4. Remove intake air duct.
5. Make sure that resistance between terminals (2) and (1) changes when opening secondary throttle valve manually.