A8L Quattro Sedan W12-6.0L (BSB) (2005)
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‹› 4-pin connector from Coolant Fan Control (FC) Control Module 2 (J671)
Checking voltage supply
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Connect multimeter to terminals 1 + 4 and 2 + 4 of connector to Engine Control Module (ECM) for voltage measurement.
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Switch ignition on. Specification: at least 10.0 V
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Switch ignition off.
If no voltage is present:
