Engine Controls - Intermittent No Start Condition

SI B 12 20 06
Engine Electrical Systems

October 2006
Technical Service

This Service Information bulletin supersedes S.M. B12 206 03 dated April 2004.

SUBJECT
Intermittent "No -Crank, No-Start" Condition

MODEL
E38 740i, 740iL with M62TU up to 04/04
E53 X5 4.4, E39 540i with M62TU up to 09/03

SITUATION
Customer may complain of an intermittent "no-crank, no-start" condition. When starting vehicle, only a "clunk" noise can be heard from the starter. Vehicle starts on a second attempt. No faults are stored in [1][2]DME/EWS control modules.

CAUSE
[1][2]DME software error.

Incorrectly processed speed signal prematurely cancels starter relay ground activation signal.

PROCEDURE
On a customer complaint basis, reprogram [1][2]DME using the current Progman version. The improved DME software was introduced since DIS CD V37 for E38 vehicle and since DIS CD V35 for E53 and E39 vehicles.

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

Defect Code Refer to KSD

Labor Operation: Refer to KSD
Labor Allowance: Refer to KSD





Disclaimer