Throttle Position Sensor: Testing and Inspection

With CONSULT
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.




7. Select "DATA MONITOR" mode with CONSULT.
8. Check voltage of "THRTL POS SEN".
Voltage measurement must be made with throttle position sensor installed in vehicle.

Throttle valve conditions THRTL POS SEN
Completely closed (a) 0.15- 0.85V
Partially open Between (a) and (b)
Completely open (b) 3.5 - 4.7V
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.




Without Tools
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 (-300mmHg, 11.81inHg)] until the throttle drum becomes free from the rod of the throttle opener.
6. Turn ignition switch ON.
7. Check voltage between ECM terminal 23 (Throttle position sensor signal) and ground.
Voltage measurement must be made with throttle position sensor installed in vehicle.

Throttle valve conditions Voltage
Completely closed (a) 0.15 - 0.85V
Partially open Between (a) and (b)
Completely open (b) 3.5 - 4.7 V
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.