ECM - Increase Idle Speed by Reprogramming DME (M5.2)

Group 12
Engine Electrical Systems

Bulletin Number
12 06 99

Woodcliff Lake, NJ
February 1999
Product Engineering

SUBJECT:
Increase Idle Speed by Reprogramming ECM/DME (M5.2)

MODEL:
E38 - 740i/iLA with M62 engine prod. 12/95 - 4/97
E39 - 540i/iA with M62 engine prod. 3/96 - 4/97

Situation:
Customer complains that the engine seems to stumble and the engine idle speed appears to be too low especially with the NC off and when:
- Steering wheel is turned fully to the right or left
- Reverse gear is selected with automatic transmission

Cause:
Increased load requirement from steering/transmission

Correction:
In case of a customer complaint, increase the engine idling speed by reprogramming the DME control module using CD P15.0 or higher. The revised program will increase the engine speed at idle by approximately 100 RPM.

Procedure:
In order to reprogram the Engine Control Module a manual determination must be performed and the following part numbers must be entered.





Refer to flowcharts for programming instructions.

Flowchart:

A:

B:

NOTE:
Once the reprogramming is completed the numbers listed above should appear on the DME identification screen.

Warranty Information: Part and labor are reimbursable under the terms of the BMW Emissions and New Car Limited Warranty of 4 years/50,000 miles.

Defect Code: 10 32 90 59 00
Labor Operation: 12 14 710
Labor Allowance: E38 - 6 FRU
E39 -7 FRU