A4 Cabriolet L4-1.8L Turbo (AMB) (2005)
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Fuel Pump (FP) relay (position 1, at 9-pin relay carrier in driver's footwell, left) must trigger and Fuel Pump (FP) must run.
A -
If Fuel Pump (FP) runs:
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Check voltage supply of Fuel Pump (FP) relay.
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Checking activation of Fuel Pump (FP) relay.
B -
If Fuel Pump (FP) does not run:
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Check voltage supply for Fuel Pump (FP) and components (via Fuel Pump -FP- relay).
Check voltage supply of Fuel Pump (FP) relay
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Remove Fuel Pump (FP) relay.
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Connect multimeter for voltage measurement as follows.
9-pin relay carrier in driver's
Measure to
footwell, left side,
position 1 Terminal
1
Chassis Ground (GND)
Specified value: approx. battery voltage
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Connect multimeter for voltage measurement as follows.
9-pin relay carrier in driver's
Measure to
footwell, left side,
position 1 Terminal
3
Chassis Ground (GND)
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Switch ignition on.
Specified value: approx. battery voltage
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Switch ignition off.
If specified values are not obtained:
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Check wire connections for open circuit according to wiring diagram.
Specified value: Wire resistance max 1.5 Ohms