A6 Sedan V6-2.8L (AHA) (1998)
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Remove fuses 28, 29, and 34 from fuse panel.
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Initiate output Diagnostic Test Mode (DTM) and advance to test of cylinder 1 fuel injector -N30-.Refer to "Scan Tool Testing/Output Diagnostic
Test Mode (DTM) (Function 03)" See: Computers and Control Systems/Testing and Inspection
NOTE: This step lets the fuel pump run without the engine running. The closed throttle position switch must be closed during the test, or the selected
fuel injector will be activated 5 times discharging fuel.
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Connect multimeter between Ground and left or right terminal of following fuses:
Fuse number
Specified voltage at left or right terminal
28
approx. battery voltage
29
approx. battery voltage
34
approx. battery voltage
If the specified value is not obtained:
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Repair wiring using applicable wiring diagram.
If wiring is OK:
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Replace fuel pump relay -J17-.