Throttle Position Sensor: Description and Operation

Throttle Position (TP) Sensor -G69-






For On Board Diagnostic (OBD):
The TP sensor is one of the engine control module sensors. However, the transmission control module also requires the TP sensor signal. Therefore, the signal from the engine control module is transmitted to the transmission control module.

On vehicles with CAN-bus, the automatic transmission control module receives the TP signal from the CAN-bus.

On vehicles without CAN-bus the signal is made available via a wire from the engine control module.

The OBD of the transmission only checks the signal, not the TP sensor! On vehicles without CAN-bus the wire for the signal is also checked.

The signal can only be read in the Measured Value Block.

NOTE: Always check the engine OBD when the transmission OBD indicates that the TP sensor is faulty.