ECM - Wrong Readings: Engine Speed,Load Signal,Timing

Group 13
Fuel System



Bulletin Number
13 01 89 (1792)



Woodcliff Lake, NJ
January 1989
Technical Dept.



SUBJECT:
DME Testing with BMW Diagnostic Module


MODELS:
All with M1.3 Series DME


SITUATION:
Testing the above DME series using the 3.0 diskette may produce erroneous readings in the following:

^ Engine Speed

^ Ignition Timing BTDC

^ Load Signal tL

SOLUTION:
Perform the DME testing with the new 5.0 diskette. The 5.0 diskette will be shipped to all BMW dealers in the near future.



WARRANTY STATUS:
Information only.