audi Workshop Repair Guides

Audi Workshop Service and Repair Manuals

With Manufacturer's Scan Tool|Page 7383 > < With Manufacturer's Scan Tool|Page 7381
Page 4
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Disconnect 4-pin harness connectors -4- to -6- at ignition coils.

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Connect e.g. V.A.G 1527 B voltage tester as follows:

Harness connector

Measure to

Terminal

2

B+

4

B+

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LED must light up.

If LED does not light up:

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Check the wire connections for open circuit.
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Specified value: Wire resistance max 1.5 Ohm

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If necessary, repair wire connection.

If LED lights up:

Checking voltage supply

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Connect multimeter for voltage measurement as follows:

Harness connector

Measure to

Terminal

1

Engine 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 obtained:

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Check activation of power output stages.

If specified value is not obtained:

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Remove rubber seal for plenum chamber cover.

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