Instruments - Cannot Turn OFF MIL After Vehicle Repair

SI B 12 13 08
Engine Electrical Systems

March 2008
Technical Service

SUBJECT
After Vehicle Repair, Service Engine Soon Lamp Cannot Be Switched Off

MODEL
E90, E91, E92, E93 (3 Series)

E60, E61 (5 Series) all models equipped with M54, N52 and N52K engines

SITUATION
After a vehicle repair, the Service Engine Soon lamp cannot be switched off. Fault code 2F9A (Ambient temp sensor, communication) is stored in the DME and will not delete.

CAUSE
The Instrument Cluster needs a software reset.

CORRECTION
Perform a software reset on the Instrument Cluster using the Instrument Cluster Test Functions

PROCEDURE

1. Press and hold the trip reset button and turn on KL-R. Test Functions are shown in the upper liquid crystal display.

2. Repeatedly press the trip reset button to reach test 19. Test 19.00 is displayed, together with Lock "ON", and Code "00".

3. To unlock the Test Functions, repeatedly press the trip reset button until the "Code" equals the sum of the last five digits of the VIN (Vehicle Identification Number).

4. Press the trip reset button to advance to Test # 21 for the S/W reset. Test 21 is displayed.

5. Press the trip reset button to activate the S/W reset and extinguish the Service Engine Soon lamp.

For complete test function details, refer to your Technical Training information.

WARRANTY INFORMATION








Covered under the terms of the BMW New Vehicle Limited Warranty.





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