Audi Workshop Service and Repair Manuals

Special tools,
testers and equipment required

• ◆ V.A.G 1526 A
• ◆ V.A.G 1527 B
• ◆ V.A.G 1594 A

Fitting location => Fitting locations overview, Page 24-6

Note:

Check connecting leads between output stage and ignition coils as well as between ignition coils and plug connection for insulation damage.

Checking secondary resistance

• ‒ Disconnect ignition cables from spark plugs.

• ‒ → Connect multimeter to valve (resistance measurement range)
• ‒ Specification: 9 ... 14 kω

If the specification is not attained:

• ‒ Renew ignition coils.

Checking primary resistance

• ‒ Pull 3-way connector off output stage
• ‒ Check connector for loose, corroded or disengaged contacts and service if necessary.

Note:

For test purposes, the contact assignment at the plug connection is of no significance, as voltage is routed to the ignition coils by way of all 3 contacts.

• ‒ → Connect multimeter in each case to one contact of output stage...

• ‒ → ... and one contact of 3-way connector to measure resistance.
• ‒ Specification: Less than 5.0 ωin each case

If the specification is not attained:

• ‒ Renew ignition coils.

Checking power supply

Test requirements:

• ● → Fuse S232 OK (in fuse holder, position 32).

• ‒ Pull white 3-way connector off ignition coils.

• ‒ → Connect voltage tester V.A.G 1527 B as follows:

• ‒ Switch the ignition on.
• ‒ The LED should light up each time.

If the LED does not light up:

• ‒ Check appropriate wiring for open circuit and service if necessary.

=> "Current Flow Diagrams, Electrical Fault Finding and Fitting Locations" binder