Secondary Throttle Position Sensor (STPS)

COMPONENT DESCRIPTION
The secondary throttle position sensor responds to the movement of the throttle motor which is controlled by the TAC module.
This sensor is a kind of potentiometer which transforms the secondary throttle position into output voltage and emits the voltage signal to the TAC module. In addition, the sensor detects the opening and closing speed and position of the secondary throttle valve and feeds the voltage signal to the TAC module.
Another case is when the secondary throttle valve opening becomes smaller than the ordinary throttle valve opening due to TCS operation. In this case, the signal from the secondary throttle valve is used for engine control. This replaces the signal from the ordinary throttle position sensor. The signal of the secondary throttle valve first enters the TAC module, from where it is sent to the ECM.





CONSULT reference value in data monitor mode

Remarks: Specification data are reference values.





ECM terminals and reference value

Remarks: Specification data are reference values and are measured between each terminal and (25) (ECCS ground) with a voltmeter.

EC-STPS-01 Secondary Throttle Position Sensor (TPS):

Secondary Throttle Position Sensor (TPS):

DIAGNOSTIC PROCEDURE








COMPONENT INSPECTION

Secondary throttle position sensor
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.