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Coolant Temperature Sensors -G62- / -G83-, Connector Assignment

Engine Coolant Temperature (ECT) Sensor -G62- 

Fig 1: Identifying Electrical Connection At Sensor
GWWA90-10016Courtesy of AUDI OF AMERICA, LLC

The ECT Sensor sits on coolant connector adapter on left of cylinder head.

-- Carefully release and disconnect 2-pin electrical connector -arrow-.

Terminal assignment of the 2-pin harness connector at ECT sensor 

Fig 2: Identifying 2-Pin Electrical Harness Connector & Terminals
GWWA24-0331Courtesy of AUDI OF AMERICA, LLC
  1. Wire connection from ECT Sensor to engine control module
  2. Sensor ground (GND)

Engine Coolant Temperature (ECT) Sensor on Radiator -G83- 

Fig 3: Identifying Engine Coolant Temperature (ECT) Sensor
GWWA90-10066Courtesy of AUDI OF AMERICA, LLC

The ECT Sensor (on Radiator) sits on front of engine.

-- Carefully release and remove 2-pin electrical connector -arrow-.

2-pin connector assignment on ECT Sensor on Radiator 

Fig 4: Identifying 2-Pin Electrical Harness Connector & Terminals
GWWA24-0331Courtesy of AUDI OF AMERICA, LLC
  1. Wiring connection from ECT Sensor to engine control module
  2. Sensor ground (GND)
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