audi Workshop Repair Guides

Audi Workshop Service and Repair Manuals

With Manufacturer's Scan Tool|Page 7339 > < With Manufacturer's Scan Tool|Page 7337
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Fuel Pump (FP) relay (at position 4 of central electronics 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.

Central electronics in driver-side

Measure to

footwell, left, position 4

Terminal

17

Chassis Ground (GND)

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Specified value: approx. battery voltage

If specified value is not obtained:

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Replace central electronics.

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Connect multimeter for voltage measurement as follows:

Central electronics in driver-side

Measure to

footwell, left, position 4

Terminal

19

Chassis Ground (GND)

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Switch ignition on.
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Specified value: approx. battery voltage

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Switch ignition off.

If specified value is not obtained:

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Check wire connections for open circuit according to wiring diagram:
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Specified value: Wire resistance max 1.5 Ohms

If specified values are obtained:

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