Part Load Mixture Adaption

Also in the part load range, mixture adaption takes place at certain intervals. The determined adaption value is taken into account in all part load ranges. The correction values stored in the control unit are intended as additional information only in the case of acute engine problems.

If problems occur during engine operation and no defect codes are stored in the defect code memory, the mixture adaption values can be read out on the BMW service tester. These values can provide an indication as to which direction troubleshooting is to be continued. The adaption values are forgotten when the voltage supply to the DME is cut. This can lead to starting and idle running problems. Depending on how far the adaption values deviated from the basic values, a considerable period of time is required until the adaption values are relearned. For this reason, idle operation or test runs are of little use in order to observe the change in the adaption values.