Additional Information

OBD Requirements for Malfunction Indicator Light (MIL) and Fault Storage





A. MIL Illumination and Fault Code Storage

General strategy of system monitoring during 2 trips (fault code management)





B. Extinguishing the MIL and Erasing Fault Code

Read-Out and Erasing a fault code

The read-out and erasing procedures of fault codes are designed according to J1979 mode 4 and mode 3.

The read-out and memory purging using a BMW test device is also possible. Please refer to a BMW test manual

Tampering Protection

For tampering protection the processor including the EPROM is soldered.

Readiness Code

The readiness code is handled according to J1979 mode 1 PID 01.

Stored Engine Conditions

The engine conditions present at the time of a fault detection are stored in the ECM memory according to the requirements.