Engine Controls - MIL ON/Throttle Potentiometer Codes
SI B 12 26 09
Engine Electrical Systems
October 2009
Technical Service
This Service Information bulletin replaces SI B12 11 07 dated April 2007.
SUBJECT
N62TU: EDK Throttle Potentiometer Faults - Diagnosis
MODEL
E60, E63, E64 with N62TU from 09/05 production
E65, E66 with N62TU from 03/05 production
E70 with N62TU from 12/06 production
SITUATION
The "Service Engine Soon" and DSC/DTC warning lamps are illuminated. The engine enters the power reduction ("fail-safe") mode.
The following intermittent and "currently not present" EDK-related faults may be stored in the DME fault memory:
^ 2CF8 Throttle valve potentiometer, signal; and/or
^ 2CF9 - Throttle valve potentiometer 1, signal; and/or
^ 2CFA - Throttle valve potentiometer 2; signal
In most cases, DSC fault 5F77 (DME invalid data) may also be stored in the DSC control module.
These faults are sporadic and usually not reproducible.
CAUSE
Resistance fluctuation in the EDK harness connector is causing an interruption of the EDK signal.
CORRECTION
If the fault codes listed above are stored and currently are not present, install a replacement EDK harness.
Do not replace the EDK throttle for this type of complaint.
PROCEDURE
See the attachment or follow the ISTA test module repair instructions, which can be found by performing a text search for "throttle valve".
REP 12 - Installing repair kit for wiring harness section, throttle valve assembly (N62TU)
PARTS INFORMATION
2010 BMW 550i Sedan (E60) V8-4.8L (N62TU) Page 269
WARRANTY INFORMATION
Covered under the terms of the BMW New Vehicle Limited Warranty, or the Certified Pre-Owned program.
2010 BMW 550i Sedan (E60) V8-4.8L (N62TU) Page 270
2010 BMW 550i Sedan (E60) V8-4.8L (N62TU) Page 271
2010 BMW 550i Sedan (E60) V8-4.8L (N62TU) Page 272
2010 BMW 550i Sedan (E60) V8-4.8L (N62TU) Page 273
ATTACHMENTS
view PDF attachment B122609EDK_Harness_Repair.
