Fuel System - MIL ON/Codes 4BED/4BDD/4BDB Set

SI B 13 02 09
Fuel Systems

October 2009
Technical Service

This Service Information bulletin supersedes SI B13 02 09 dated March 2009.

[NEW] designates changes to this revision

SUBJECT
E70 M57Y Diesel - Diagnosis for Low-pressure Fuel Supply Faults

MODEL
E70 with M57Y engine

The Service Engine Soon lamp is illuminated (a "Fuel Pump Malfunction" message is displayed in the CC), and a combination of the following fault codes may be stored in the DDE control module:

^ 4BED/4BDD - Fuel pressure control, control deviation (pressure too high/too low)

^ 4BDB - Fuel pre-supply pressure control, control deviation/negative

In conjunction with the EKPS fault code:

^ 6292 - Control voltage too low, implausible signal currently present. There are no obvious drivability complaints associated with the stored fault codes.

Work through the corresponding ISTA test modules, mainly B1612_SPG00 (EKPS voltage control test) and B1365_D7USVDR (Fuel supply pre-pressure control).

Make sure to inspect the EKPS connector and wiring, and verify that they are intact and properly installed.

Clear the DDE and EKPS fault memory and test-drive the vehicle.

In case the fuel pressure supply fault codes (4BED/4BDD/4BDB/6292) are stored again with the CC message displayed, then replace the fuel overflow valve (P/N 13 51 8 506 862) located on the High-pressure Injection Pump (HDP).

[NEW]

1. In order to gain access to the High-pressure Injection Pump (HDP), remove the alternator.

2. Remove the overflow valve from the High-pressure Injection Pump (HDP) (1).





3. Use the clean engine oil to lubricate the valve's 0-ring.

4. Screw the replacement (P/N 13 51 8 506 862) overflow valve into the pump's body by hand, and then torque it to 20 Nm +/- 1.5.





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





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