Throttle Position Sensor: Testing and Inspection

P0120 Throttle Position Sensor

With Consult
1. Start engine and warm it up to normal operating temperature.
2. Stop engine and turn ignition switch "ON".




3. Select "DATA MONITOR" mode with CONSULT.




4. 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".
5. If it is impossible to adjust closed throttle position switch in "Basic Inspection", replace throttle position sensor.

OR

Without Consult
1. Start engine and warm it up to normal operating temperature.
2. Stop engine and turn ignition switch "ON".







3. Check voltage between ECM terminal [23] (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".
4. If it is impossible to adjust closed throttle position switch in "Basic Inspection", replace throttle position sensor.

P0510 Closed Throttle Position Switch

Throttle position sensor

With Consult
1. Start engine and warm it up to normal operating temperature.
2. Stop engine and turn ignition switch "ON".




3. Select "DATA MONITOR" mode with CONSULT.




4. Check indication of "CLSD THL/P SW".
Measurement must be made with closed throttle position switch installed in vehicle.
If NG, adjust closed throttle position switch. Refer to "Basic Inspection".
5. If it is impossible to adjust closed throttle position switch in "Basic Inspection", replace closed throttle position switch.

OR

Without Consult
1. Start engine and warm it up to normal operating temperature.
2. Turn ignition switch "OFF".
3. Disconnect closed throttle position switch harness connector.







4. Check continuity between terminals [5] and [6].
Resistance measurement must be made with closed throttle position switch installed in vehicle.
If NG, adjust closed throttle position switch. Refer to "Basic Inspection".
5. If it is impossible to adjust closed throttle position switch in "Basic Inspection", replace closed throttle position switch.