A4 Cabriolet V6-3.0L (AVK) (2003)
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Initiate final control diagnosis and actuate Evaporative Emission (EVAP) canister purge regulator valve -N80-. See: Computers and Control
Systems/Testing and Inspection/Scan Tool Testing and Procedures/Scan Tool Testing/Output Diagnostic Test Mode (DTM) (Function 03)
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Fuel pump relay (on the 9-unit-relay carrier in the driver's footwell on the left, position 1) should pull and fuel pump should run.
A -
If relay does not respond:
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Check voltage supply of fuel pump relay.
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Check activation of fuel pump relay.
B -
If relay is energized but fuel pump does not run:
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Check voltage supply for fuel pump and components (via fuel pump relay).
Checking voltage supply of fuel pump relay
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Disconnect fuel pump relay.
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Connect multimeter as follows to measure voltage:
9-unit relay carrier in driver's footwell
Measure to
on left, position 1 terminal
1
Car body ground (GND)
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Specified value: approx. battery voltage
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Connect multimeter as follows to measure voltage:
9-unit relay carrier in driver's footwell
Measure to
on left, position 1 terminal
3
Car body ground (GND)
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Switch ignition on.
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Specified value: approx. battery voltage.
If the specified values are not obtained:
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Check wiring connections.
If specifications are obtained: