Throttle Position (TP) Sensor

The TP sensor (C0787) comprises two potentiometer tracks. Track 1 is provided a 5V reference feed by the ECM (C0331) on a Y wire. Track 2 is provided a 5V reference feed by the ECM (C0331) on a YG wire. Track 1 provides a throttle position signal back to the ECM on a W wire. This signal will be approximately 0.5V with the pedal at rest, and 2V at full throttle. Track 2 provides a throttle position signal back to the ECM on a WG wire. This signal will be approximately 0.5V with the throttle at rest, and 4.5V at full throttle. The ECM also provides an earth path for track 1 and track 2 on NG and UG wires respectively.

For more information of TP sensor operation, refer to ENGINE CONTROL - DESCRIPTION & OPERATION .