Throttle Position Sensor

Throttle Position:

The throttle position signal is used by the ECM to regulate charging pressure. for adjusting the ignition timing. and for supplying a richer mixture during acceleration and a leaner mixture during deceleration. Maximum charging pressure can only occur at wide open throttle.


Cars without TCS:
The throttle position signal is obtained from pin 3 of the throttle position sensor and applied to pin 45 of the ECM.

Typical signal voltages are about 0.2 V DC at idling speed and about 4 V DC at wide open throttle.

Cars with TCS:
On cars with TCS the throttle position signal (PWM) is obtained from pin 26 of-the ETS control module and applied to pin 57 of the ECM. The signal voltage may vary between about 0.2 V at idling speed to about 4.0 V DC at wide open throttle.