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Testing if display is approx. - 40.0° C:

-- Disconnect the Engine Coolant Temperature (ECT) Sensor -G62- electrical harness connector -1-.

Fig 1: Identifying Engine Coolant Temperature (ECT) Sensor (On Radiator) Electrical Harness Connector
GWWA10-1568Courtesy of AUDI OF AMERICA, LLC

-- Using a jumper wire, connect the Engine Coolant Temperature (ECT) Sensor -G62- electrical harness connector terminals 1 to 2.

-- Check the value indicated on the scan tool display.

Fig 2: Identifying 2-Pin Electrical Connector & Terminals
GWWA28-0040Courtesy of AUDI OF AMERICA, LLC

If the value jumps to approx. 140.0° C

-- End diagnosis and switch the ignition off.

-- Replace the Engine Coolant Temperature (ECT) Sensor - G62-.

If indication remains at approx. -40.0° C:

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