m54 engine - BMWClub.lv

More documents

Recommendations

Info

CRANKSHAFT SENSORThe crankshaft sensor is a dynamic Hall-effect sensor (mounted through the engine block),the signal is sent the moment the crankshaft begins to rotate.The pulse wheel is mounted directly to the crankshaft as seen on previous models.MS 43.0SMOOTH RUNNING ENGINENOTE SQUARE WAVEENGINE MISFIRE DETECTED____________________________________________________________________________________________________________________________________________________________________________________________________________28M54engMS43/ST039/3/17/00
MISFIRE DETECTIONAs part of the CARB/OBD regulations the engine control module must determine if misfireis occurring and also identify the specific cylinder(s) and the severity of the misfire event,and whether it is emissions relevant or catalyst damaging. In order to accomplish thesetasks the control module monitors the crankshaft for acceleration losses during firing segmentsof each cylinder based on firing order.Misfire Detection Example: M54 (6 Cyl.) with Siemens SystemThe misfire/engine roughness calculation is derived from the differences in the period duration(T) of individual increment gear segments. Each segment period consist of an angularrange of 120° crank angle that starts 78° before Top Dead Center (TDC).If the expected period duration is greater than the permissible value a misfire fault for theparticular cylinder is stored in the fault memory of the ECM. Depending on the level of misfirerate measured the control unit will illuminate the "Service Engine Soon" light, may cutofffuel to the particular cylinder and may switch lambda operation to open-loop. All misfirefaults are weighted to determine if the misfire is emissions relevant or catalyst damaging._________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________29M54engMS43/ST039/3/17/00
Page 1: Table of ContentsSubjectPageM54 Eng
Page 4 and 5: M54 ENGINEMechanical ChangesIn addi
Page 6 and 7: M54B30 ENGINE293225ART-HPCHARTB30.6
Page 8 and 9: REVIEW QUESTIONS1. What is the majo
Page 10 and 11: SYSTEM OVERVIEW I-P-OServiceEngineS
Page 12 and 13: MS 43 NEW FUNCTIONSACCELERATOR PEDA
Page 14 and 15: MS 43 NEW FUNCTIONSEDK THROTTLE POS
Page 16 and 17: MS 43 NEW FUNCTIONSMAIN RELAY MONIT
Page 18 and 19: MS 43 NEW FUNCTIONSDM-TL (DIAGNOSIS
Page 20 and 21: DM-TL (DIAGNOSIS MODULE - TANK LEAK
Page 22 and 23: LEAK DIAGNOSIS TESTPHASE 1 - REFERE
Page 24 and 25: TEST RESULTSThe time duration varie
Page 26 and 27: OXYGEN SENSOR SIGNAL INFLUENCE ON I
Page 30 and 31: EMISSIONS RELEVANT:During an interv
Page 32 and 33: MASS AIR FLOW SENSOR HFMThe Siemens
Page 34 and 35: NOTE: With extremely hot oil temper
Page 36 and 37: The dual VANOS in conjunction with
Page 38 and 39: SECONDARY AIR INJECTIONThis ECM con
Page 40 and 41: ENGINE/VEHICLE SPEEDLIMITATIONFor e
Page 42 and 43: RESONANCE/TURBULENCE INTAKE SYSTEMO
Page 44 and 45: #1 Cylinder Intake Valve openLow to
Page 46 and 47: IDLE SPEED CONTROLThe ECM determine
Page 48 and 49: PURGE VALVEThe purge valve (TEV) is

m54 engine - BMWClub.lv

Create successful ePaper yourself

Delete template?

Save as template?