Malfunction Memory

DESCRIPTION
The EZL/AKR ignition control unit (N1/3) is equipped with diagnostics including malfunction memory.

Malfunctions which occur with the engine running are counted by a malfunction counter. A malfunction is recorded into memory only if the same malfunction has occurred after 8 sequential engine starts. This prevents a malfunction from being recorded if, for example, it occurred only once. If, for example, a malfunction occurred only 7 times, then the malfunction counter will be cleared again after a certain number of engine starts.

The memory remains active even if the vehicle's battery is disconnected.

Malfunctions occurring in the following areas are stored immediately:

- Crankshaft position sensor defective (impulse readout 17)
- Magnets for crankshaft position sensor not recognized (impulse readout 18)

Malfunctions can be recalled from memory using the impulse counter with engine off and the ignition ON. Numbers ranging from 1 to 41 may appear on the display of the impulse counter.

The number 1 indicates NO MALFUNCTION RECOGNIZED IN SYSTEM. All further numbers refer to a particular malfunction source. If there are multiple system malfunctions, the malfunction assigned with the lowest number will be displayed first.

If the impulse readout number indicated first reappears after more than two impulse readouts, then no further malfunctions are present in the system.

After eliminating all malfunctions, they must be cleared individually.

In case of engine complaints, the malfunction memory must be read and the malfunction must be eliminated before proceeding with any additional repairs.