2010 BMW 335Cic Convertible (E93) L6-3.0L Turbo (N54) 273
Engine Controls, Fuel - Hard Start/Driveability/DTCs Set
SI B 12 55 06
Engine Electrical Systems
March 2010
Technical Services
This Service Information bulletin supersedes SI B12 55 06 dated March 2010.
[NEW] designates changes to this revision
SUBJECT
N54 - Diagnosis for DME FC 29DC/29F2/2FBF
MODEL
E90, E92 with N54 produced from 06/06
E93, E60, E61 with N54 produced from 03/07
E82, E88 with N54 from start of production
E71; X6 with N54 from start of production
E89; Z4 with N54 from start of production
SITUATION I
The customer may complain of:
^ Excessive cranking time before the engine starts (5-6 seconds) on a cold start or after a hot soak.
^ [NEW] In most cases, diagnosis shows fault code 2FBF as the only fault stored in the DME with SES lamp illumination.
SITUATION II
The customer may complain of the following:
^ "Vehicle loses power while driving" or "Vehicle runs poorly".
^ The Service Engine Soon lamp may be illuminated.
^ Diagnosis shows fault code 29DC (Cylinder injection cut-out, pressure too low in high-pressure system) and/or 2FBF (Fuel pressure on-release
injection, pressure too low), and in some cases, also in conjunction with 29F1 (Fuel high-pressure, plausibility) and 29F2 (Fuel high-pressure, fuel
pressure undershot).
^ In some cases, misfire faults for various cylinders (e.g., FC 20D1, 29CF, 29D2, 29CE, 29D0, 29CC) are also stored in MSD80/MSD81.
CAUSE
Possible causes may include:
^ Sensitivity of injection pump (HDP) diagnostic software
^ Internal failure of a High-pressure Injection Pump (HDP)
^ Failure of an electric fuel pump or a clogged fuel filter
^ Failure of the low or high-pressure sensors
^ Defective fuel pressure check - valve/fuel pressure regulator
^ Failure of a volume control valve
^ Defective fuel injector
^ Intermittent electrical connection problem (wire and/or connector) in the fuel delivery system.
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PARTS INFORMATION
2010 BMW 335Cic Convertible (E93) L6-3.0L Turbo (N54) 275
2010 BMW 335Cic Convertible (E93) L6-3.0L Turbo (N54) 276
WARRANTY INFORMATION
Attachments
2010 BMW 335Cic Convertible (E93) L6-3.0L Turbo (N54) 277
N54 Engine Diagnostic Fault Tree version 03_11_10 - Page 1
2010 BMW 335Cic Convertible (E93) L6-3.0L Turbo (N54) 278
DFT - Leaking Injector - Page 2
2010 BMW 335Cic Convertible (E93) L6-3.0L Turbo (N54) 279
DFT - Fuel System - Page 3
2010 BMW 335Cic Convertible (E93) L6-3.0L Turbo (N54) 280
DFT - Mixture Adaptation Fault - Page 4
2010 BMW 335Cic Convertible (E93) L6-3.0L Turbo (N54) 281
DFT - Single Misfire Fault - Page 5
2010 BMW 335Cic Convertible (E93) L6-3.0L Turbo (N54) 282
DFT - Rough Running @ Cold Start - Page 6
2010 BMW 335Cic Convertible (E93) L6-3.0L Turbo (N54) 283
DFT - Rough Running @ Warm Engine - Page 7
Correction For Situation I
CORRECTION FOR SITUATION I
[NEW] For E60, E61, E82, and E88 vehicles where the customer complains of "Long Cranking Time" and fault code 2FBF is stored in the
DME with the SES illuminated, proceed as follows:
1. [NEW] Use the current ISTA diagnosis software (2.19 or higher).
2. [NEW] While observing the fuel pressure, activate the electric fuel pump for 20 seconds, using ISTA and the diagnostic query function (after the
vehicle test, select Control unit tree; DME; Call ECU functions; Diagnostic query; and Low pressure fuel pump with activation).
3. [NEW] Immediately after electric pump activation, the pressure must reach at least 4.75 bars.
4. [NEW] If the minimum threshold of 4.75 bars was not reached, further diagnose the low-pressure system using test module B1214_DI KDR, Fuel
Pressure Control (possibly defective electric fuel pump or fuel filter/pressure regulator).
5. If the minimum threshold of 4.75 bars was reached, reprogram the vehicle with ISTA/P 2.37.0 (or higher). The target integration levels should be:
E60/E61 - E060-10-03-501 or higher
E82/E88 - E89x-10-03-501 or higher.
6. After programming, readapting the DME by means of a short test drive is recommended:
^ Bring the engine to the normal operating temperature.
2010 BMW 335Cic Convertible (E93) L6-3.0L Turbo (N54) 284
^ 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.
^ If possible, to confirm repair effectiveness, let the vehicle sit overnight and cold start it the next morning. Then let it idle for approximately 5
minutes.
For E89 (Z4) vehicles where the customer complains of "Long Cranking Time" and only the fault code 2FBF is stored in the DME with the
SES illuminated, proceed as follows:
1. Install a calibrated manual fuel pressure gauge (e.g., P/N 83 30 0 491 260 pressure gauge from the K-L-Jetronic special tool kit P/N 83 30 0 491
259), connected with the three-way adapter tool 135,270, into the low-pressure fuel supply line as follows:
#1 - Three-way adapter tool; (135 270)
#2 - Pressure gauge P/N 83 30 0 491 260
2. [NEW] Use the current ISTA diagnosis software (2.19 or higher).
3. [NEW] While observing the fuel pressure on the gauge, activate the electric fuel pump for 20 seconds, using ISTA and the component activation
function (after the vehicle test, select Control unit tree; DME; Call ECU functions; Component activation; and Fuel pump).
4. [NEW] Immediately after electric pump activation, the pressure read from the manual gauge must reach at least 4.75 bars.
5. [NEW] If the minimum threshold of 4.75 bars was not reached, further diagnose the low-pressure system using test module B1214_DI KDR, Fuel
Pressure Control (possibly defective electric fuel pump or fuel filter/pressure regulator).
6. If the minimum threshold of 4.75 bars was reached, reprogram the vehicle with ISTA/P 2.37.0 (or higher). The target integration level should be
E89x-10-03-501 or higher.
After programming, 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.
^ If possible, to confirm repair effectiveness, let the vehicle sit overnight and cold start it the next morning. Then let it idle for approximately 5
minutes.
[NEW] For E90, E92, and E93 vehicles where the customer complains of "Long Cranking Time" and only the fault code 2FBF is stored in
the DME with the SES illuminated, proceed as follows:
1. [NEW] Use the current ISTA diagnosis software (2.19 or higher).
2. [NEW] While observing the fuel pressure, activate the electric fuel pump for 20 seconds, using ISTA and the diagnostic query function (after the
vehicle test, select Control unit tree; DME; Call ECU functions; Diagnostic query; and Low pressure fuel pump with activation).
3. [NEW] Immediately after electric pump activation, the pressure must reach at least 4.75 bars.
4. [NEW] If the minimum threshold of 4.75 bars was not reached, further diagnose the low-pressure system using test module B1214_DI KDR, Fuel
Pressure Control (possibly defective electric fuel\ pump or fuel filter/pressure regulator).
5. If the minimum threshold of 4.75 bars was reached, reprogram the vehicle with ISTA/P 2.37.0 (or higher). The target integration level should be
2010 BMW 335Cic Convertible (E93) L6-3.0L Turbo (N54) 285
E89x-10-03-501 or higher.
6. After programming, check the DME programmed part number:
^ If the DME programmed number is 7611xxx or higher, then proceed to step # 8.
^ If the DME programmed number is lower than 7611xxx, replace the HDP pump using P/N 13 51 7 594 943, which incorporates the latest
improvements to internal sealing. For the pump replacement procedure, refer to RA 13 51 017.
7. After HDP replacement, clear the adaptation values of the high-pressure flow control valve in the DME by selecting the path:
^ Activities / Service Functions
^ Drive
^ Motor Electronics
^ Adjustment Programs
^ Delete Adaptations / variants, and then Test plan
^ Reset the adaptive values.
8. After programming, 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.
^ If possible, to confirm repair effectiveness, let the vehicle sit overnight and cold start it the next morning. Then let it idle for approximately 5
minutes.
[NEW] For E71 X6 vehicles where the customer complains of "Long Cranking Time" and only the fault code 2FBF is stored in the DME
with the SES illuminated, proceed as follows:
1. [NEW] Use the current ISTA diagnosis software (2.19 or higher).
2. [NEW] While observing the fuel pressure, activate the electric fuel pump for 20 seconds, using ISTA and the diagnostic query function (after the
vehicle test, select Control unit tree; DME; Call ECU functions; Diagnostic query; and Low pressure fuel pump with activation).
3. [NEW] Immediately after electric pump activation, the pressure must reach at least 4.75 bars.
4. [NEW] If the minimum threshold of 4.75 bars was not reached, further diagnose the low-pressure system using test module B1214_DI KDR, Fuel
Pressure Control (possibly defective electric fuel pump or fuel filter/pressure regulator).
5. If the minimum threshold of 4.75 bars was reached, replace the HDP pump using P/N 13 51 7 594 943, which incorporates the latest
improvements to internal sealing. For the pump replacement procedure, refer to RA 13 51 017.
6. After HDP replacement, clear the adaptation values of the high-pressure flow control valve in the DME by selecting the path:
^ Activities / Service Functions
^ Drive
^ Motor Electronics
^ Adjustment Programs
^ Delete Adaptations / variants, and then Test plan
^ Reset adaptive values.
Correction For Situation II
CORRECTION FOR SITUATION II
For E90, E92, E93, E60, E61, E82, E88, E89, and E71 vehicles where the customer complains of "Losing power when driving", fault codes
29DC/2FBF and/or 29F1/29F2 are stored in the DME with the SES illuminated; proceed as follows:
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1. Use the current ISTA diagnosis software. Perform test module B1214_DI KDR (Fuel Pressure Control).
2. IMPORTANT: perform this step ONLY FOR E89 (Z4) vehicles (not equipped with the low fuel pressure system sensor):
Prior to execution of the High-pressure test module, install a calibrated manual fuel pressure gauge (e.g., P/N 83 30 0 491 260 pressure gauge from
the K-LJetronic special tool kit P/N 83 30 0 491 259), connected with the three-way adapter tool 135 270, into the low-pressure fuel supply line as
follows: #1. Three-way adapter tool (135 270) #2 - Pressure gauge P/N 83 30 0 491 260.
3. [NEW] Perform all applicable steps of the High-pressure Fuel test module B1214_DI KDR. Pay attention to all questions being displayed during
diagnosis and answer them correctly.
Important Note:
When comparing the measured fuel pressure with the engine running at idle speed, make sure to let the fuel pressure stabilize for approximately 60
seconds prior to the final reading. Otherwise, an implausible value (around 150 bars) is going to be entered into the test, resulting in inaccurate
diagnosis (defective high-pressure pump).
4. After completion of all diagnostic steps, end the test module and enter the "fault feedback" screen. Enter the result of a diagnosis process into the
DiagnosisCode dialog box and obtain a "Diagnostic Code". In case no failure can be currently detected in the high-pressure fuel system, enter the
last option "No fault found" into the dialog box. The obtained Diagnostic Code should be included in the comment section of the warranty claim.
IMPORTANT DIAGNOSTIC HINT:
In certain cases, the HDP fault may be reproduced only when the engine is under load. In order to replicate the complaint, it may be necessary to
road-test vehicle with the manual fuel pressure gauge installed. The excessive low-pressure fuel fluctuation (between 5.0 and 7.0 bars) would
indicate incorrect operation of the fuel delivery system.
5. For additional comprehensive N54 drivability diagnostic information, refer to the "N54 Engine Diagnostic Fault Tree" (the current version
"03_11_10" is attached to this bulletin).
6. Make sure that FASTA data is transmitted after the completion of all appropriate test modules.
7. IMPORTANT:
Part Replacement Authorization is required (via submission of a TC Case) for replacement of the following N54 engine fuel system components: the
High-pressure Pump (HDP) and High-pressure Rail Sensor on E82, E88, E89, E90, E60, E61, and E71 vehicles. For details related to the "N54 Fuel
System TC Action", refer to SI B13 08 09.
8. In case the High-pressure Fuel Pump needs to be replaced, use the updated part P/N 13 51 7 594 943, which incorporates the latest improvements
to internal sealing. For the pump replacement procedure, refer to RA 13 51 017.
9. After replacement, clear the adaptation values of the high-pressure flow control valve in the DME by selecting the path:
^ Activities / Service Functions
^ Drive
^ Motor Electronics
^ Adjustment Programs
^ Delete Adaptations / variants, and then Test plan
^ Reset adaptive values.
10. IMPORTANT NOTE:
2010 BMW 335Cic Convertible (E93) L6-3.0L Turbo (N54) 287
In addition, vehicles which have had the HDP pump replaced have to be reprogrammed afterwards with ISTA/P 2.37.0 (or higher). The target
integration levels should be:
E60/E61 - E060-10-03-501 or higher
E82/E88/E89/E90/E92/E93 - E89x-10-03-501 or higher
11. After programming, 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.
^ If possible, to confirm repair effectiveness, let the vehicle sit overnight and cold start it the next morning. Then let it idle for approximately 5
