Astra
Note:
Via O2 BLOCK LEARN 1, learned deviations from the ideal mixture condition (e.g. by air leakage) are captured by the control unit and stored in the permanent memory. The learning process takes place only if the oxygen regulation is active and the engine is operating normally. O2 BLOCK LEARN 1 operates in the whole characteristic curve range, but dominates mainly in the lower engine speed range. The correction values learned by the system are stored in a long term memory, so that they are available also after the supply voltage has been switched off and the engine re-started. With O2 BLOCK LEARN 1 an evaluation of the learned values of the system can be made.
In order to be able to evaluate the deviation of O2 BLOCK LEARN 1, O2 INTEGRATOR must be observed. If this also lies outside the tolerance range, a statement can be made about the mixture condition of the engine.
Trouble-shooting: Nominal Value: Cause of Fault:
For · O2 BLOCK LEARN 1 < 80 steps 20 XE, 20 XEJ: 128 steps · See test step 25 and System becomes leaner, mixture too rich · O2 INTEGRATOR < 123 steps C 20 XE: 123 to 131 steps
· O2 BLOCK LEARN 1 > 127 steps · See test step 25 and System becomes richer, mixture too lean · O2 INTEGRATOR > 133 steps
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