Astra
Note:
Via O2 BLOCK LEARN 2, learned multiplicative deviations from the ideal mixture condition (e.g. by alterations in the density of the air, alterations in the density and quality of the fuel, injection valve errors, etc.) 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. The multiplicative correction factor operates in the whole characteristic curve range, but dominates mainly in the central to high engine speed ranges. With O2 BLOCK LEARN 2 an evaluation of the learned values of the system can be made. To evaluate O2 BLOCK LEARN 2, O2 INTEGRATOR must also be consulted. If O2 BLOCK LEARN 2 continues to display a marginal value (no value change over a considerable period of time), 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 2 < 124 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: 124 to 131 steps
· O2 BLOCK LEARN 2 > 131 steps · See test step 25 and System becomes richer, mixture too lean · O2 INTEGRATOR > 133 steps
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