Check Sensor Output Power Supply
Measure the voltage between electronic throttle control connector and engine ground.
Connector & terminal
(E57) No. 6 (+) - Engine ground (- ):
Is the voltage less than 10 V?
YES. Go to CHECK HARNESS BETWEEN ECM & ELECTRONIC THROTTLE CONTROL .
NO
Repair battery short circuit in harness between ECM connector and electronic throttle control connector.