Table of contents: TO #6 ↓ Adjustment data ↓
TO #6
The ignition timing, in fact, cannot be lost in the electronically controlled ignition systems of the Audi-100. The workshop also checks the ignition setting as part of the idle mode test and the exhaust gas toxicity test. To do this, it is first necessary to interrogate the fault memory. Then the ignition system control unit must be brought to the basic setting. This is also done with a device for reading the fault memory. There is no point in independently adjusting the ignition setting if the fault memory has not been interrogated before. Since our control units are self-learning, they can carry out the necessary clarification of the ignition setting, for example, if a signal from one of the sensors is missing. Before changing anything in the ignition setting, you need to be sure that the ignition setting has not been spoiled by some failure in the system.
The above applies to the so-called basic adjustment with the VAG 1551 fault memory reader. Until the control unit has been brought to the basic setting, correct adjustments cannot be made. That is why you should contact an Audi workshop. They will check the following parameters.
Adjustment data
The table shows one test and one set ignition adjustment value, which should be understood as follows: during express testing, the larger tolerance of the test value is used. If adjustment is required in any case, it should be done thoroughly, as close as possible to the set value.
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Hint: The idle speed switch and knock sensor influence the ignition timing of a vehicle with the corresponding equipment. A faulty knock sensor can be recognized by the fact that the ignition timing is delayed by at least 10° after briefly pressing the accelerator pedal.