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BMW F39 X2 M35i Reference Manual
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BMW F39 X2 M35i Reference Manual

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R e f e r e n c e Ma n u a l
F 3 9 X 2 M3 5 i
T R A N S MI S S I ON
T e c h n i c a l T r a i n i n g
T h e i n f o r ma t i o n c o n t a i n e d i n t h i s ma n u a l i s n o t t o b e r e s o l d , b a r t e r e d , c o p i e d o r t r a n s f e r r e d
w i t h o u t t h e e x p r e s s w r i t t e n c o n s e n t o f B MW o f N o r t h A me r i c a , L L C ( " B MW N A " ) .
C o p y r i g h t © 2 0 1 8 B MW o f N o r t h A me r i c a , L L C

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Summary of Contents for BMW F39 X2 M35i

  • Page 1 R e f e r e n c e Ma n u a l F 3 9 X 2 M3 5 i T R A N S MI S S I ON T e c h n i c a l T r a i n i n g T h e i n f o r ma t i o n c o n t a i n e d i n t h i s ma n u a l i s n o t t o b e r e s o l d , b a r t e r e d , c o p i e d o r t r a n s f e r r e d w i t h o u t t h e e x p r e s s w r i t t e n c o n s e n t o f B MW o f N o r t h A me r i c a , L L C ( "...
  • Page 2 Technical￿training. Product￿information. F39￿X2￿M35i￿Transmission BMW￿Service...
  • Page 3 General￿information Symbols￿used The￿following￿symbol￿is￿used￿in￿this￿document￿to￿facilitate￿better￿comprehension￿or￿to￿draw￿attention to￿very￿important￿information: Contains￿important￿safety￿information￿and￿information￿that￿needs￿to￿be￿observed￿strictly￿in￿order￿to guarantee￿the￿smooth￿operation￿of￿the￿system. Information￿status:￿October￿2017 BMW￿Group￿vehicles￿meet￿the￿requirements￿of￿the￿highest￿safety￿and￿quality￿standards.￿Changes in￿requirements￿for￿environmental￿protection,￿customer￿benefits￿and￿design￿render￿necessary continuous￿development￿of￿systems￿and￿components.￿Consequently,￿there￿may￿be￿discrepancies between￿the￿contents￿of￿this￿document￿and￿the￿vehicles￿available￿in￿the￿training￿course. The￿information￿contained￿in￿the￿training￿course￿materials￿is￿solely￿intended￿for￿participants￿in￿this training￿course￿conducted￿by￿BMW￿Group￿Technical￿Training￿Centers,￿or￿BMW￿Group￿Contract Training￿Facilities. This￿training￿manual￿or￿any￿attached￿publication￿is￿not￿intended￿to￿be￿a￿complete￿and￿all￿inclusive source￿for￿repair￿and￿maintenance￿data.￿It￿is￿only￿part￿of￿a￿training￿information￿system￿designed￿to assure￿that￿uniform￿procedures￿and￿information￿are￿presented￿to￿all￿participants. For￿changes/additions￿to￿the￿technical￿data,￿repair￿procedures,￿please￿refer￿to￿the￿current￿information issued￿by￿BMW￿of￿North￿America,￿LLC,￿Technical￿Service￿Department. This￿information￿is￿available￿by￿accessing￿TIS￿at￿www.bmwcenternet.com. Additional￿sources￿of￿information Further￿information￿on￿the￿individual￿topics￿can￿be￿found￿in￿the￿following: • Owner's￿Handbook • Integrated￿Service￿Technical￿Application • Aftersales￿Information￿Research￿(AIR) The￿information￿contained￿in￿this￿manual￿is￿not￿to￿be￿resold,￿bartered,￿copied,￿or￿transferred without￿the￿express￿written￿consent￿of￿BMW￿of￿North￿America,￿LLC￿(“BMW￿NA”). ©2018￿BMW￿of￿North￿America,￿LLC The￿BMW￿name￿and￿logo￿are￿registered￿trademarks.￿All￿rights￿reserved.
  • Page 4 F39￿X2￿M35i￿Transmission Contents Gearbox ................................................... 1.1. Overview ............................................... 1.2. Automatic￿transmission ....................................1.2.1. Overview ......................................1.2.2. AISIN￿TU￿8G45-460￿automatic￿transmission ................1.2.3. AISIN￿TU￿–￿Electronic￿emergency￿transmission￿release ........1.2.4. AISIN￿TU￿–￿Mechanical￿emergency￿transmission￿release ....... 1.2.5. AISIN￿TU￿–￿Oil￿volume￿reservoir ......................1.2.6. AISIN￿TU￿–￿Notes￿for￿service ........................General￿Vehicle￿Electronics ....................................2.1. Bus￿overview ..........................................

  • Page 6: Gearbox

    F39￿X2￿M35i￿Transmission 1.￿Gearbox The￿F39￿X2￿M35i￿will￿be￿equipped￿with￿a￿newly￿designed￿automatic￿transmission. In￿the￿following￿section,￿the￿new￿8G45-460￿automatic￿transmission￿is￿referred￿to￿as￿the￿“AISIN￿TU” automatic￿transmission,￿and￿the￿GA8F22AW￿is￿called￿the￿“AISIN”￿automatic￿transmission. The￿AISIN￿TU￿automatic￿transmission￿(8G45-460)￿features￿an￿electronic￿gear￿selector￿switch￿GWS. The￿AISIN￿transmission￿(GA8F22AW),￿on￿the￿other￿hand,￿has￿a￿gear￿selector￿lever￿with￿a￿cable. F39￿Gear￿selector￿switch￿variants Index Explanation Electronic￿gear￿selector￿switch￿GWS Gear￿selector￿switch￿with￿cable AISIN AISIN￿TU (GA8F22AW) (8G45-460) Electronic￿gear￿selector￿switch￿GWS  Hydraulic￿actuation￿of￿the￿shift￿elements  ...

  • Page 7: Overview

    F39￿X2￿M35i￿Transmission 1.￿Gearbox F39￿Gear￿selector￿switch￿GWS The￿electronic￿gear￿selector￿switch￿(GWS)￿is￿used￿for￿selecting￿a￿drive￿position.￿The￿electronic￿gear selector￿switch￿(GWS)￿is￿a￿designed￿as￿a￿separate￿control￿unit.￿It￿consists￿of￿a￿control￿electronics￿and the￿selector￿lever.￿The￿control￿electronics￿contains￿the￿sensors￿for￿detecting￿the￿selector￿lever￿position and￿the￿locks￿to￿prevent￿accidental￿shifting. The￿selector￿lever￿position￿of￿the￿gear￿selector￿switch￿is￿detected￿without￿contact￿by￿means￿of￿Hall effect￿sensors￿and￿transmitted￿to￿the￿transmission￿control￿(EGS)￿via￿the￿PT-CAN2. In￿the￿AISIN￿TU￿transmission,￿the￿selector￿lever￿position￿cannot￿be￿changed￿from￿"P"￿to￿"N"￿without switching￿on￿the￿engine.￿The￿hydraulic￿pressure￿needed￿to￿actuate￿the￿shift￿elements￿can￿only￿be￿built up￿if￿the￿engine￿is￿running. 1.1.￿Overview For￿the￿launch￿in￿November,￿the￿F39￿X2￿M35i￿will￿be￿equipped￿with￿a￿8G45-460￿automatic transmission￿along￿with￿the￿B48A20T1￿engine. Model Engine Automatic￿transmission BMW￿X2￿M35i B48A20T1 AISIN￿TU...

  • Page 8: Overview

    F39￿X2￿M35i￿Transmission 1.￿Gearbox 1.2.￿Automatic￿transmission 1.2.1.￿Overview The￿AISIN￿automatic￿transmission￿(GA8F22AW)￿is￿still￿used￿in￿the￿F39￿X2￿sDrive28i￿and￿xDrive28i, while￿the￿new￿AISIN￿TU￿automatic￿transmission￿8G45-460￿is￿only￿used￿in￿the￿X2￿M35i. F39￿Automatic￿transmission Index Explanation AISIN￿(GA8F22AW) AISIN￿TU￿(8G45-460) 1.2.2.￿AISIN￿TU￿8G45-460￿automatic￿transmission The￿transmission￿is￿an￿advancement￿of￿the￿AISIN￿automatic￿transmission￿(GA8F22AW).
  • Page 9 F39￿X2￿M35i￿Transmission 1.￿Gearbox AISIN￿TU￿(8G45-460)￿automatic￿transmission Index Explanation Electronic￿transmission￿control￿EGS Engine￿oil￿cooler Cover,￿hydraulic￿unit Tank￿ventilation￿line The￿following￿changes￿were￿implemented: • Electronic￿gear￿selector￿switch￿GWS • Torque￿converter￿with￿new￿dampers • Band￿brake￿B1￿replaced￿by￿disc￿brake • New￿hydraulic￿unit • Oil￿pump￿with￿parallel￿axes • Gear￿set￿changes • Weight-optimized￿housing • Use￿of￿low-friction￿oil...
  • Page 10 F39￿X2￿M35i￿Transmission 1.￿Gearbox • Coasting￿available￿in￿starting￿mode • Mechanical￿limited￿slip￿differential￿on￿the￿front￿axle￿integrated￿in￿the￿transmission • Launch￿Control￿xDrive These￿changes￿result￿in￿the￿following￿improvements: • Improved￿shifting￿comfort • Improved￿dynamic￿gearshifts￿that￿result￿in￿a￿sportier￿vehicle￿characteristic • Increased￿ride￿comfort • Reduction￿in￿consumption • Improved￿acoustic￿comfort￿due￿to￿new￿dampers • Direct￿driving￿feedback￿due￿to￿earlier￿and￿faster￿closing￿of￿the￿converter￿lockup￿clutch. Extension￿of￿the￿coasting￿function The￿coasting￿function,￿which￿was￿previously￿only￿enabled￿in￿the￿"ECO-PRO"￿driving￿program,￿is￿now also￿used￿in￿the￿"COMFORT"￿driving￿program.￿The￿extended￿operating￿strategy￿guarantees￿that￿the coasting￿function￿is￿only￿activated￿when￿the￿driving￿situation￿permits￿an￿energy-related￿advantage￿to the￿coasting￿overrun.￿The￿configuration￿via￿iDrive￿is￿now￿omitted. Coasting￿display￿in￿CID Torque￿converter The￿torque￿converter￿was￿optimized￿for￿the￿new￿dampers.￿The￿pump￿impeller,￿turbine￿wheel￿and￿stator and￿the￿3-line￿converter￿lockup￿clutch￿were￿reduced￿in￿size￿for￿the￿new￿dampers.￿However,￿reducing the￿packaging￿space￿does￿not￿limit￿the￿drive-off￿behavior￿and￿the￿controllability￿of￿the￿system. Two￿different￿dampers￿are￿used,￿depending￿on￿the￿engine￿versions: • Centrifugal￿pendulum. • Fixed￿frequency￿tuned￿mass￿damper.
  • Page 11 F39￿X2￿M35i￿Transmission 1.￿Gearbox AISIN￿TU￿(8G45-460)￿Dampers Index Explanation Torque￿converter￿with￿centrifugal￿pendulum Torque￿converter￿with￿fixed￿frequency￿tuned￿mass￿damper Due￿to￿the￿high￿rotational￿vibration￿damping￿of￿both￿dampers,￿the￿converter￿lockup￿clutch￿can￿be closed￿earlier,￿which￿lowers￿the￿fuel￿consumption.
  • Page 12 F39￿X2￿M35i￿Transmission 1.￿Gearbox Comparison￿of￿rotational￿vibration￿damping Index Explanation Dynamic￿torque￿(Nm) Engine￿speed￿(rpm) Fixed￿frequency￿tuned￿mass￿damper Super￿long￿travel￿damper￿II￿(old￿system) Centrifugal￿pendulum...
  • Page 13 F39￿X2￿M35i￿Transmission 1.￿Gearbox Transmission￿oil￿pump AISIN￿TU￿(8G45-460)￿Oil￿pump Index Explanation Drive￿gear,￿engine Chain Gear,￿transmission￿oil￿pump The￿transmission￿oil￿pump￿is￿driven￿by￿a￿chain￿and￿supplies￿the￿transmission￿and￿the￿oil￿volume reservoir￿with￿the￿necessary￿transmission￿oil￿pressure. Parking￿lock The￿parking￿lock￿in￿the￿transmission￿is￿engaged￿automatically￿when￿the￿engine￿is￿switched￿off.￿This is￿implemented￿via￿a￿piston￿located￿next￿to￿the￿EGS￿control￿unit￿and￿connected￿to￿the￿parking￿linkage and￿parking￿pawl￿by￿a￿lever.
  • Page 14 F39￿X2￿M35i￿Transmission 1.￿Gearbox AISIN￿TU￿(8G45-460)￿Parking￿lock Index Explanation Parking￿pawl Gear Parking￿linkage Lever Stop￿valve Parking￿cylinder When￿the￿engine￿is￿switched￿on,￿the￿parking￿cylinder￿is￿supplied￿with￿hydraulic￿pressure￿and￿the piston￿presses￿the￿level￿upward.￿This￿keeps￿the￿parking￿pawl￿above￿the￿gear￿and￿unable￿to￿engage. When￿the￿parking￿position￿is￿engaged,￿the￿hydraulic￿pressure￿is￿reduced￿in￿the￿parking￿cylinder￿and the￿parking￿cylinder￿and￿lever￿move￿down.￿The￿movement￿is￿transferred￿to￿the￿parking￿linkage￿and￿lets the￿parking￿pawl￿engage.￿The￿stop￿valve￿keeps￿the￿parking￿lock￿in￿its￿position. In￿case￿of￿a￿breakdown,￿the￿automatic￿transmission￿can￿be￿electronically￿or￿mechanically￿emergency- released. 1.2.3.￿AISIN￿TU￿–￿Electronic￿emergency￿transmission￿release Electronic￿release￿of￿the￿parking￿lock￿is￿only￿possible￿if￿the￿starter￿motor￿can￿crank￿the￿engine. The￿vehicle￿can￿roll￿away￿when￿the￿lock￿is￿released.￿Only￿release￿the￿parking￿lock￿with￿the￿vehicle parked￿on￿level￿ground￿and￿protect￿the￿vehicle￿against￿rolling￿away.
  • Page 15 F39￿X2￿M35i￿Transmission 1.￿Gearbox The￿parking￿lock￿can￿be￿released￿electronically￿as￿follows: AISIN￿TU￿(8G45-460)￿Electronic￿emergency￿transmission￿release Index Explanation Press￿and￿hold￿the￿brake￿pedal￿throughout￿the￿entire￿process. Press￿the￿START/STOP￿button￿–￿the￿starter￿motor￿must￿start￿up￿audibly. Press￿and￿hold￿down￿the￿release￿button. Move￿the￿selector￿lever￿to￿selector￿lever￿position￿N￿and￿hold. Hold￿the￿N￿position￿until￿the￿selector￿lever￿position￿N￿is￿displayed￿in￿the instrument￿cluster￿(a￿Check￿Control￿message￿is￿displayed). Release￿the￿selector￿lever￿and￿release￿the￿brake￿as￿soon￿as￿the￿starter￿motor stops. If￿the￿parking￿lock￿cannot￿be￿released￿electronically,￿it￿can￿also￿be￿released￿manually.
  • Page 16 F39￿X2￿M35i￿Transmission 1.￿Gearbox 1.2.4.￿AISIN￿TU￿–￿Mechanical￿emergency￿transmission￿release The￿vehicle￿can￿roll￿away￿when￿the￿lock￿is￿released.￿Only￿release￿the￿parking￿lock￿when￿the￿vehicle￿is parked￿on￿level￿ground￿and￿secure￿the￿vehicle￿against￿rolling￿away. The￿parking￿lock￿can￿be￿released￿mechanically￿as￿follows:￿The￿ignition￿is￿not￿permitted￿to￿be￿switched Remove￿the￿air￿filter￿housing￿from￿the￿engine￿compartment. Mechanically￿turn￿the￿shaft￿on￿the￿transmission￿clockwise￿to￿the￿stop￿in￿the￿N￿position￿(attention: danger￿of￿rolling￿away￿). To￿move￿the￿vehicle,￿the￿ignition￿must￿be￿switched￿on￿(if￿the￿transmission￿jumps￿back￿into￿P automatically,￿let￿the￿vehicle￿"fall￿asleep"￿until￿the￿lit￿P￿on￿the￿selector￿lever￿goes￿out;￿then￿begin again￿with￿step￿2). AISIN￿TU￿(8G45-460)￿Manual￿emergency￿release￿of￿parking￿lock Index Explanation P￿position￿of￿transmission N￿position￿of￿transmission 1.2.5.￿AISIN￿TU￿–￿Oil￿volume￿reservoir The￿oil￿volume￿reservoir￿enables￿the￿automatic￿engine￿start-stop￿function￿2.3.￿The￿AISIN￿TU￿thus features￿additional￿MSA￿functions￿compared￿to￿its￿predecessor￿AISIN￿automatic￿transmission (MSA￿2.2):...
  • Page 17 F39￿X2￿M35i￿Transmission 1.￿Gearbox • MSA￿stop￿on￿inclines • Shortening￿of￿the￿starting￿times • Reflex￿start￿in￿the￿event￿of￿a￿change￿in￿mind • Automatic￿engine￿stop￿at￿driver￿request • Manoeuvrability￿for￿automatic￿engine￿start-stop￿function￿coasting￿or￿stop • Improved￿stopping￿and￿starting￿comfort. The￿transmission￿oil￿pump￿is￿no￿longer￿driven￿during￿the￿engine￿stop￿phases.￿When￿the￿automatic engine￿start-stop￿function￿is￿activated,￿the￿maximum￿gearbox￿oil￿pressure￿must￿be￿present￿for￿the starting￿process￿to￿take￿place￿dynamically￿without￿a￿noticeable￿delay.￿However,￿the￿mechanically driven￿transmission￿oil￿pump￿cannot￿build￿up￿this￿pressure￿quickly￿enough￿when￿the￿engine￿starts. An￿oil￿volume￿reservoir￿is￿used￿for￿this￿reason.￿Owing￿to￿the￿volume￿of￿transmission￿oil￿stored￿here under￿pressure,￿the￿shift￿elements￿can￿be￿charged￿as￿soon￿as￿the￿vehicle￿is￿driven￿off,￿even￿before￿the transmission￿oil￿pump￿has￿built￿up￿the￿necessary￿pressure. The￿oil￿volume￿reservoir￿is￿therefore￿always￿charged￿when￿the￿engine￿is￿running￿and￿the￿transmission oil￿pump￿is￿activated.￿When￿charging,￿transmission￿oil￿flows￿into￿the￿hydraulic￿cylinder. Variation￿in￿gearbox￿oil￿pressure￿over￿time￿at￿engine￿start Index Explanation Gearbox￿oil￿pressure Nominal￿value￿of￿the￿gearbox￿oil￿pressure￿which￿is￿required￿to￿hydraulically actuate￿the￿shift￿elements Transmission￿oil￿pressure￿curve￿with￿hydraulic￿impulse￿storage Transmission￿oil￿pressure￿curve￿without￿hydraulic￿impulse￿storage Time￿at￿which￿the￿automatic￿transmission￿with￿hydraulic￿impulse￿storage￿is ready￿for￿driving￿off Time￿at￿which￿the￿automatic￿transmission￿without￿hydraulic￿impulse￿storage is￿ready￿for￿driving￿off Time...
  • Page 18 F39￿X2￿M35i￿Transmission 1.￿Gearbox In￿the￿AISIN￿automatic￿transmission￿(GA8F22AW),￿an￿electrical￿transmission￿oil￿pump￿is￿used instead￿of￿an￿oil￿volume￿reservoir￿to￿implement￿the￿MSA￿2.2.￿Both￿are￿integrated￿in￿the￿automatic transmission. Installation￿location￿of￿the￿hydraulic￿impulse￿storage Index Explanation AISIN￿automatic￿transmission￿(GA8F22AW)￿with￿electrical￿transmission￿oil pump AISIN￿TU￿automatic￿transmission￿(8G45-460) Mechanical￿transmission￿oil￿pump Hydraulic￿impulse￿storage 1.2.6.￿AISIN￿TU￿–￿Notes￿for￿service The￿car￿wash￿mode￿is￿active￿for￿15￿minutes.￿During￿this￿time,￿the￿ignition￿is￿not￿permitted￿to￿be switched￿off. The￿transmission￿is￿provided￿with￿a￿life-time￿oil￿filling.￿No￿oil￿change￿is￿required￿throughout￿the￿entire running￿time. The￿following￿servicing￿must￿be￿performed￿when￿the￿control￿unit￿is￿exchanged: • Programming￿the￿P￿position • Hydraulic￿pressure￿adaptation. When￿the￿entire￿automatic￿transmission￿is￿exchanged,￿a￿new￿electronic￿transmission￿control￿(EGS) is￿also￿supplied.￿The￿EGS￿contains￿the￿information￿status￿for￿a￿new￿vehicle￿and￿first￿needs￿to￿be adapted.￿For￿this￿reason,￿minor￿restrictions￿in￿comfort￿may￿occur￿after￿installation￿of￿a￿new￿automatic transmission￿until￿the￿adaptation￿is￿completed.
  • Page 19 F39￿X2￿M35i￿Transmission 1.￿Gearbox The￿following￿components￿can￿be￿replaced: • Electronic￿transmission￿control￿EGS • Torque￿converter • Differential￿oil￿seals • Oil￿sump • Hydraulic￿shift￿unit • Hydraulic￿shift￿unit￿wiring￿harness • Transmission￿input-speed￿sensor • Engine￿oil￿cooler • Tank￿ventilation￿line • Oil￿filler￿plug.
  • Page 20 F39￿X2￿M35i￿Transmission 2.￿General￿Vehicle￿Electronics 2.1.￿Bus￿overview F39￿bus￿overview...
  • Page 21 F39￿X2￿M35i￿Transmission 2.￿General￿Vehicle￿Electronics Index Explanation Start-up￿node￿control￿units￿for￿starting￿and￿synchronizing the￿FlexRay￿bus￿system Control￿units￿with￿wake-up￿authorization ACSM Advanced￿Crash￿Safety￿Module Trailer￿module Audio￿amplifier Body￿Domain￿Controller Central￿Information￿Display Controllers Car￿Sharing￿Module Digital￿Motor￿Electronics Dynamic￿Stability￿Control Electronic￿transmission￿control Electronic￿Power￿Steering FLEL Frontal￿Light￿Electronics￿Left FLER Frontal￿Light￿Electronics￿Right Roof￿function￿center Gear￿selector HEAD￿UNIT Head￿unit Automatic￿operation￿of￿tailgate Head‐Up￿Display IHKS Integrated￿heating￿and￿A/C￿control￿unit IHKA Integrated￿automatic￿heating￿/￿air￿conditioning KAFAS Camera-based￿driver￿support￿systems KOMBI Instrument￿panel Longitudinal￿torque￿distribution Park￿Distance￿Control Parking￿Manoeuvring￿Assistant Optional￿equipment￿system SMFA Seat￿module,￿driver...