Control-module self-test, S54 engine

Control-module self-test, S54 engine

The program and variable memories of the engine control module are checked regularly. If a fault occurs, a fault code is stored in the fault memory.

Other components are also checked. The resulting fault code entries, however, may also be attributed to other faults or problems. For this reason further information is evaluated in test mode in order to determine whether the problem relay is a control-module fault.

In the event of such an authentic control-module fault, the control module is to be programmed or replaced. In other cases, electrical engine components have to be examined more closely.

Even sporadic faults lead to an entry, but this does not necessarily involve a repair measure.

Note:

The replacement of a control module may only be selected as a measure if this has been indicated expressly.