Engine Controls - MIL ON, Various Misfire DTC's

2010 BMW 335Cic Convertible (E93) L6-3.0L Turbo (N54) Technical Service Bulletin # 120610 Date: 100701

Engine Controls - MIL ON, Various Misfire DTC's

SI B 12 06 10

Engine Electrical Systems

July 2010

Technical Service

This Service Information bulletin supersedes SI B12 06 10 dated April 2010.

[NEW] designates changes to this revision

2010 BMW 335Cic Convertible (E93) L6-3.0L Turbo (N54) 332

SUBJECT

N54 - Misfire Faults, Diagnosis with ISTA D

MODEL

All with N54 engine

SITUATION I

The Service Engine Soon lamp is illuminated with various misfire fault codes (e.g., 29CC, 29D2, 29D1, 29D0, 29C0, 29CF) stored in the DME

control module.

When executing the misfire test plan B1214_DI6MISFIRE2 (using ISTA D 2.19 or 2.20), the procedure instructs the technician to replace the

complete set of piezo injectors, even in situations when only the single misfire fault is stored in the individual cylinder, and the vehicle is already

equipped with the latest improved version of the injectors (P/N 13 53 7 585 261). The Diagnostic Code D1350_00000000_01_013 is provided at the

end of the test plan.

CAUSE

Error in the B1214_DI6MISFIRE2 test plan in ISTA D 2.19 and 2.20

CORRECTION

Do not follow the recommendation of the test plan to replace a complete set of the injectors (unless, in a very unlikely situation, the affected vehicle

is equipped with the earliest version injectors, P/N 13 53 7 537 317).

[NEW] NOTE:

[NEW] The Misfire Test plan has been corrected with ISTA/D 2.21. Make sure the latest version (2.21 or higher) is being used when diagnosing

N54 drivability complaints.

For comprehensive N54 drivability misfire diagnosis, always refer to the "N54 Engine Diagnostic Fault Tree" file (the current version [NEW]

"06_04_10" is attached).

SITUATION II

The Service Engine Soon lamp is illuminated and a single, individual cylinder misfire fault is stored in the DME. The affected vehicle's integration

level has been checked and corrected if needed (per SI B12 05 09 and SI B12 06 09), and the latest version of the piezo injectors (P/N 13 53 7 585

261) is already installed.

CAUSE

Deviation between adaptation tolerances of the individual injector and a cylinder

CORRECTION

Swap the affected injector with the one from another bank (e.g., misfiring cylinder 1 injector swap with the injector from cylinder 6).

Replace the Teflon seal (P/N 13 53 7 57 550) before injector installation (refer to SI B13 06 06 and REP 13 53 310 for detailed instructions).

After the injector replacement, perform individual injector calibration (adjustment) with the DME control module per SI B12 26 08, using test plan

S1214_DI6IAG "Injector volume calibration".

Finally, clear the DME adaption values, using test plan B1214_NG6AWZS "Deleting engine adaptation values" found in Service Functions.

Readapting the DME by means of a short test drive is recommended:

^ Bring the engine to the normal operating temperature.

^ Drive the vehicle at a speed of between 50-60 mph and engine speeds of 2,000-3,000 rpm for approximately 3 minutes (use manual gear shifting,

if needed).

^ Let the engine idle for approximately 5 minutes.

WARRANTY INFORMATION

For information only

ATTACHMENTS

2010 BMW 335Cic Convertible (E93) L6-3.0L Turbo (N54) 333

2010 BMW 335Cic Convertible (E93) L6-3.0L Turbo (N54) 334

2010 BMW 335Cic Convertible (E93) L6-3.0L Turbo (N54) 335

2010 BMW 335Cic Convertible (E93) L6-3.0L Turbo (N54) 336

2010 BMW 335Cic Convertible (E93) L6-3.0L Turbo (N54) 337

2010 BMW 335Cic Convertible (E93) L6-3.0L Turbo (N54) 338

2010 BMW 335Cic Convertible (E93) L6-3.0L Turbo (N54) 339

2010 BMW 335Cic Convertible (E93) L6-3.0L Turbo (N54) 340

view PDF attachment B120610_N54_Engine_Diagnostic_Fault_Tree_06_04_2010.