Testing Fuel Injectors on a 2004 S6 V8-42L (BBD) with Generic Scan Tool
Fuel Injector: Testing and Inspection
With Manufacturer's Scan Tool
Injectors, checking
Electrical checks on injectors
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Remove connector from the injector which is to be tested.
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Connect hand-held multimeter to injector to measure resistance. Specified value: 13 ... 16 Ohms
NOTE: When the engine is at operating temperature the resistance of the injectors is increased by approx. 4 ... 6 Ohms.
If specified value is not attained:
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Replace injector.
If specified value is attained:
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Check voltage supply.
Checking power supply
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Remove connector from injector to be tested.
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Connect diode test lamp for measuring voltage between Ground and socket 1 of connector.
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Operate starter for a few seconds (engine can be allowed to start).
Specified value: The diode test lamp should illuminate.
If the diode test lamp illuminates:
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Check wiring
If the diode test lamp does not illuminate: