audi Workshop Repair Guides

Audi Workshop Service and Repair Manuals

With Manufacturer's Scan Tool|Page 7380 > < With Manufacturer's Scan Tool|Page 7378
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Ignition Coil: Testing and Inspection
With Generic Scan Tool

Ignition Coils With Power Output Stages, Checking

Recommended special tools and equipment

-

VAG1526A multimeter

-

V.A.G 1527 B Voltage Tester

-

VAG1594A connector test kit

-

VAG1598/31 test box

NOTE:  The ignition coil and power output stage are combined in one complete component.

Test requirement:

-

Fuses for engine electronics OK

Procedure

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Start engine and let run at idle.

Recognize a non-functional or misfiring cylinder as follows:

-

Disconnect connectors from fuel injectors in sequence with engine running and observe engine operation.
or

-

Compare spark plugs from all cylinders to each other. Check electrodes for carbon fouling.

If faulty cylinder is recognized:

-

Switch spark plug from faulty cylinder with one from another cylinder.

If malfunction follows the spark plug:

-

Replace spark plug.

With Manufacturer's Scan Tool|Page 7380 > < With Manufacturer's Scan Tool|Page 7378