Checking Ground (GND) wire

• Connect multimeter for voltage measurement as follows:
  Fig 1: Identifying Camshaft Position Sensor Harness Connector Terminals

  Courtesy of AUDI OF AMERICA, INC.
  CAMSHAFT POSITION (CMP) SENSOR: TERMINAL 3 MEASURE
  
  

  Harness connector Terminal	Measure to
  3	B+

  • Specified value: about 10 V

If all specified values are being reached and the LED does not blink (measured between terminal 1 and 2 with starter and connector connected):

• Replace Camshaft Position (CMP) sensor.

If specified values are not obtained: