A6 V6-3.0L (AVK) (2004)
Checking activation of Fuel Pump (FP) relay
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Remove cable bridge.
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Remove Fuel Pump (FP) relay.
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Connect test box to wiring harness of Engine Control Module (ECM); ECM is not connected. See: Computers and Control Systems/Testing and
Inspection/Reading and Clearing Diagnostic Trouble Codes/Scan Tool Connecting/With Generic Scan Tool/Test Box, Connecting For Wiring
Testing
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Check the following wire connection for open circuit according to wiring diagram:
Central electronics in driver-side
Test box
footwell, left, position 4
Terminal
Socket
16
65
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Specified value: Wire resistance max 1.5 Ohms
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Also check the wire for short circuit to B+ and Ground (GND).
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Specified value: Infinity Ohms (no continuity)
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If necessary, repair wire connection.
If no malfunctions are detected:
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Replace Fuel Pump (FP) Relay -J17-.
or
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Replace Engine Control Module (ECM).
Check voltage supply for Fuel Pump (FP) and components
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Remove fuses S228, S232, and S234 (positions 28, 32, and 34) from fuse holder.
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Connect multimeter for voltage measurement to Ground (GND) and to one terminal of the following fuses in the fuse holder.
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Operate starter briefly.
Fuse
Specified value at one of the terminals
S228
approx. battery voltage
S232
approx. battery voltage
S234
approx. battery voltage
If specified values are not obtained: