A4 Quattro Sedan V6-3.0L (AVK) (2002)
Checking activation of fuel pump relay
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Switch ignition off.
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Reconnect relay.
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Connect test box V.A.G 1598/31 to wiring harness for engine control module; do not connect to engine control module. See: Computers and
Control Systems/Testing and Inspection/Scan Tool Testing and Procedures/Scan Tool Testing/Scan Tool Connecting and Initial Checks/Wiring
and Component Testing Using VAG1598/31 Test Box
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Bridge terminals 1 and 65 at test box with leads from adapter kit VAG 1594 A
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Switch ignition on.
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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 fuel and fuel pump should run.
If the relay responds now, but not during final control diagnosis:
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Replace engine control module.
If the relay does not respond:
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Switch ignition off.
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Disconnect cable link.
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Disconnect fuel pump relay.
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Check for open circuit, short to positive, or short to ground (GND) in following wiring connection:
9-unit relay carrier in driver's footwell
Test box VAG 1598/31
on left, position 1 terminal
Socket
5
65
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Repair any open/short circuit as necessary.
If no DTC is found:
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Replace Fuel Pump (FP) Relay -J17-.
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Reconnect engine control module.
Checking voltage supply of fuel pump and components