Table of Contents Engine Electronics IPO’s Subject Page IPO’s.3 M5.2.1: Inputs - Processing - Outputs .5 M5.2.1 ECM I: Inputs - Processing - Outputs.6 M5.2.1 ECM II: Inputs - Processing - Outputs .7 ME7.2: Inputs - Processing - Outputs .8 MS S52: Inputs - Processing - Outputs.9 MS S54: Inputs - Processing - Outputs.10 MS41.1 & MS41.2: Inputs - Processing - Outputs .11 MS41.1: Inputs - Processing - Outputs.12 MS42: Inputs - Processing - Outputs.13 MS43: Inputs - Processing - Outputs.14 MS45: Inputs - Processing - Outputs.15 MS45.1: Inputs - Processing - Outputs.16 ME 9.2: Inputs - Processing - Outputs.17 MED 9.2.1: Inputs - Processing - Outputs.18 MED 9.2.1: Inputs - Processing - Outputs.19 MED 9.2.3: DME Interface (N62).20 MSV70: Inputs - Processing - Outputs .22 MSV80 (N52KP): DME Interface.24 MSD80 (E9x): Inputs - Processing - Outputs .26 MSD80 (E7x): Inputs - Processing - Outputs .28 MSD80 (N52): DME Interface.30 MSD81 (N54): DME Interface.31 MEVD17.2 (N55): DME Interface.32 MEVD17.2 (N55): Inputs - Processing - Outputs.34 MEVD17.2 Control Unit .36 MSD85 (N63): DME Interface.38 MSD85 Control Unit .40 MSD87-12 (N74): DME Interface .42 MSD87-12: Control Unit.43 Initial Print Date: 03/11 Revision Date: Engine Electronics IPO’s Model: All Production: All • Describe the main components of the DME Interface 2 Engine Electronics IPO’s IPO’s The cart shown below is a quick reference of BMW Engine Management Systems by application to BMW models, engines and model years. This will help you get familiar with the systems by identifying the correct version that you are diagnosing. ENGINE MANAGEMENT CONTROL VERSIONS VERSION VEHICLE MODEL ENGINE MODEL YEAR Ml.2 E32 / M5 M70 / S38 M70 = 1988- 1999 S38= 1991 - 1993 Ml.7 E31 / E32 M70 1991 - 1994 Ml.7 E30 M42 1990 - 1993 Ml.7 E36 M42 1992 - 1995 Ml.7 E36 M42 / DISA 1995 Ml.7.1 E31 S70 1991 - 1992 Ml.7.2 E36 M42 /DISA 1992 M3.1 E34 M50 1991 - 1992 M3.1 E36 M50 1992 M3.3 E32 M60 1993 - 1994 M3.3 E31 / E34 M60 1994 - 1995 M3.3.1 E34 / E36 M50TU 1993 - 1995 M5.2 E36 / Z3 M44 1996 - 1998 M5.2 E31 /E38/E39 M62 / M73 1995 - 1997 MS41.1 E36 / E39 /Z3 M52 1996 - 1998 MS41.2 E36 M3 S52 1996 - 1998 M5.2.1 E38 / E39 M62 / M73 1998-1999 MS42 E46 / E39 /Z3 M52TU 1998-2000 MS43 E46 / E39 / E53 / Z3 M54 E46 2001 - 2002 Z3 2001 - 2002 E39 2001 - 2003 E53 2001 - 2006 ME7.2 E39 / E38 / E53 M62TU 1999 - 2001 MSS52 E39 M5 / E52 Z8 S62 M5 1999-2003 Z8 2000 - 2003 MSS54 E46 M3 S54 2001 -2007 BOSH = M; SIEMENS = MS 3 Engine Electronics IPO’s ENGINE MANAGEMENT CONTROL VERSIONS VERSION VEHICLE MODEL ENGINE MODEL YEAR MS45 E85 M54 2003 - 2006 MS45 E83 all except M54B30 AUTO M54 2003 - 2006 MS54.1 E83 with M54B30 auto M54 2003 - 2006 MS45.1 E46 M54 2003 - 2006 MS45.1 E46 M56 SULEV 2003 - 2006 ME 9.2 E65/66 N62 2002 - 2003 ME9.2.1 E53 / E60 / E63 / E64 / E65 / E66 N62 2004 - 2004 ME 9.2.2 E53 / E60 / E63 / E64 / E65 / E66 N62 2005 - 2007 MED 9.2.1 E66 N73 2003 - 2006 ME 9.2.3 E70 N62 2006 - 2010 MSS65 M5, M6 (E6x) S85 2006 - 2009 MSV70 E90, E91, E92, E93, E60, E70. N52 2004 - 2006 MSV80 E82, E88, E90, E91, E92, E93, E60, E70. N52KP 2006- MSD80 E82, E90, E92, E93, E60, E61. N54 2006 - 2008 MSD81 E70, E71, E82, E84, E88, E89, E90, E92, E93, F07, F10 N54 2008- MEVD 17.2 E82, E88, E90, E91, E92, E93, E60, E70. N55 2010- MSD85 E70, E71, E72, F01, F02, F04, F07, F10 N63 2009- MSD85.1 E70M/E71 M S63 2009- MSD87-12 F01, F02 N74 2009- BOSH = M; SIEMENS = MS 4 Engine Electronics IPO’s M5.2.1: Inputs - Processing - Outputs FUSED MEMORY B+ POWER ►- AUX KL 31 MAIN KL 31 OPERATING POWER KL R POWER FOR DME COMPONENTS KL 50 (ONE TOUCH START SIGNAL) KL 15 AIR TEMP SIGNAL AIR MASS SIGNAL nr? *TPlj THROTTLE ^ POSITION SENSOR ENGINE SPEED / REF SIGNAL CAMSHAFT POSITION SENSOR KNOCK 4X SENSORS “ROLLING CODE” ISN jirwrum ■Z5 ROAD SPEED SIGNAL M62 M5.2.1 POWER SUPPLY AIR MANAGEMENT FUEL MANAGEMENT IGNITION MANAGEMENT EMISSIONS MANAGEMENT N PERFORMANCE CONTROLS ECM RELAY OUTPUT: LDP VACUUM SOLENOID CONTROL INPUT: LDP FEEDBACK IDLE SPEED CONTROL VALVE M LEAK DIAGNOSIS PUMP FUEL PUMP t l RELAY CONTROL FULLY SEQUENTIAL FUEL INJECTOR ^ ✓ CONTROL 8X IGNITION COIL r. CONTROL 8X ! US f IGNITION COIL(S) POWER RELAY HEATED THERMOSTAT PRE¬ CAT J 2X 02 SENSOR HEATING POST-fl CAT # 2X w ■±T §CA RUNNING LOSS 3/2 FUEL RAIL VALVE CONTROL u LAMP CONTROL PURGE VALVE CONTROL IHKA 1^ i_i — — i_i fed lul U-J L__/ 1 _ 1 1 _ 1 COMPRESSOR CUTOUT (KO-RELAY) DSC III STEERING ANGLE SENSOR (9/97) “ONE TOUCH” STARTER RELAY CONTROL 5 Engine Electronics IPO’s M5.2.1 ECM I: Inputs - Processing - Outputs 6 Engine Electronics IPO’s M5.2.1 ECM II: Inputs - Processing - Outputs 7 Engine Electronics IPO’s ME7.2: Inputs - Processing - Outputs KL 30 CONSTANT BATTERY POWER ►- AUX KL 31 ECM MAIN RELAY — OPERATING POWER MAIN KL 31 KL R POWER DISTRIBUTION TO SYSTEM KL 50 (ONE TOUCH START SIGNAL) KL 15 “Wake Up Call” AIR TEMP SIGNAL AIR MASS SIGNAL _ □ ENGINE TEMP SIGNAL ENGINE SPEED /REF SIGNAL IGNITION MONITOR CAMSHAFT POSITION SENSOR PRE & POST CAT CONV. 0 2 SENSOR \| MONITORING KL 50 (ONE TOUCH START SIGNAL) RADIATOR OUTLET TEMPERATURE SENSOR “ROLLING CODE” ISN CRUISE CONTROL (FGR) DATA LINE U BRAKE LIGHT SWITCH BRAKE LIGHT TEST SWITCH CLUTCH SWITCH 0 ^ ROAD SPEED SIGNAL MRS III (3/99 SOP) ME 7.2 POWER SUPPLY AIR MANAGEMENT FUEL MANAGEMENT IGNITION MANAGEMENT EMISSIONS MANAGEMENT PERFORMANCE CONTROLS LEAK DIAGNOSIS PUMP ELECTRIC THROTTLE VALVE (EDK) 8 Engine Electronics IPO’s MS S52: Inputs - Processing - Outputs KL 15 “WAKE UP CALL” r4 ECM RELAY —• ' #1 ~ AIR TEMP SIGNAL AIR MASS SIGNAL f u ENGINE TEMP PWG -OOOCH .THROTTLE POSITION 2X ENGINE SPEED / REF SIGNAL MAIN KL 31 -^vp- operating POWER POWER FOR DME COMPONENTS CAMSHAFT POSITION SENSORS 4X KNOCK SENSORS 4X 02 SIGNAL 2X 2X PRE & POST -MW - 0 SENSOR MONITORING “IP CATALYTIC CONVERTER TEMP •114 MFL BUTTON PAD SPORT SWITCH GEAR RECOGNITION SWITCH BRAKE OIL LEVEL TEMP SENSOR ruunLn ROAD SPEED SIGNAL & CORNERING FORCE “ROLLING CODE” ISN MS S52 POWER SUPPLY AIR MANAGEMENT FUEL MANAGEMENT IGNITION MANAGEMENT EMISSIONS MANAGEMENT N PERFORMANCE CONTROLS INTEGRATED BAROMETRIC SENSOR ECM RELAY CONTROL IDLE SPEED CONTROL VALVE * M * ELECTRONIC LEBRJ THROTTLE MOTOR FUEL PUMP MODULE CONTROL FULLY-SEQUENTIAL FUEL INJECTOR CONTROL IGNITION COIL CONTROL IGNITION COIL(S) POWER RELAY m 8X -? y SECONDARY AIR INJECTION AIR PUMP RELAY CONTROL & MONITOR MS S54 POWER SUPPLY AIR MASS SIGNAL AIR TEMP SIGNAL -das 6X THROTTLE POSITION ENGINE COOLANT TEMPERATURE CRANKSHAFT POSITION SENSOR AIR MANAGEMENT FUEL MANAGEMENT IGNITION MANAGEMENT CAMSHAFT POSITION SENSORS w % 2X EMISSIONS MANAGEMENT TEMPERATURE SENSOR MFL BUTTON PAD GEAR RECOG NITION SWITCH (oj) BRAKE LIGHT SWITCH BRAKE LIGHT TEST SWITCH OIL TEMP SENSOR E46 K- IHKA BUS VEHICLE SPEED INPUT ROLLING CODE n n rui* N PERFORMANCE CONTROLS ECM RELAY CONTROL SUCTION JET PUMP SOLENOID k KL 15 (m). IDLE ACTUATOR V 7 ELECTRONIC fEDR - THROTTLE MOTOR FUEL PUMP MODULE Fuel Pump Module FULLY-SEQUENTIAL FUEL INJECTOR CONTROL ✓ 1“ i 6X IGNITION COILS CONTROL 6X SECONDARY AIR INJECTION AIR L' PUMP RELAY [HI CONTROL 1-97) AIR MASS SIGNAL INTAKE AIR TEMP J THROTTLE POSITION ENGINE COOLANT TEMPERATURE TO CLUSTER CRANKSHAFT SPEED n BAROMETRIC PRESSURE SENSOR (>9-97) CAMSHAFT POSITION SENSOR KNOCK 2X SENSORS SECONDARY IGNITION MONITOR 02 SENSOR SIGNALS (2 PRE & 2 POST CAT) INDIVIDUAL SERIAL NUMBER o to < runLnur. S-EML S-MSR S-ASC VEHICLE SPEED IHKA UEJ m ir ■ CZZJ u u [ _j 1 - L J 1_1 __J 1 3^=5 1 Z) 15-90% DUTY ™nnnm> A/C STATUS SIGNAL (S-KO) MS41.1 E39 POWER SUPPLY AIR MANAGEMENT FUEL MANAGEMENT IGNITION MANAGEMENT EMISSIONS MANAGEMENT PERFORMANCE CONTROLS IDLE CONTROL VALVE ECM RELAY CONTROL FUEL PUMP f RELAY CONTROL SEQUENTIAL FUEL INJECTOR CONTROL ✓ # 6X IGNITION COIL 1. IGNITION COIL POWER RELAY (>1-97) CONTROL 6X I V SECONDARY AIR INJECTION AIR PUMP RELAY CONTROL J - Y_ SECONDARY AIR INJECTION SOLENOID PRE¬ CAT 2X 02 SENSOR HEATING (m) post- I; l CAT # 2X ■F RUNNING LOSS (>9-97) LAMP CONTROL CHECK ENGINE EVAPORATIVE EMISSION VALVE CONTROL ~T~ ZZZI — IT—1 | ZZZ — ZZD ZED 1—J j i - 1 L—l COMPRESSOR OFF (KO-RELAY) TD Ti VAN OS SOLENOID -fcr f 1 CAN ffif CO o LU THROTTLE POSITION (DK) O co < DIS 12 Engine Electronics IPO’s LEAK DIAGNOSIS PUMP (>9-97) INPUT: LDP FEEDBACK OUTPUT: LDP VACUUM SOLENOID CONTROL MS42: Inputs - Processing - Outputs 13 Engine Electronics IPO’s MS43: Inputs - Processing - Outputs DISplus 14 Engine Electronics IPO’s MS45: Inputs - Processing - Outputs KL 15 AIRMASS SIGNAL INTAKE AIRTEMP THROTTLE POSITION ENGINE TEMPERATURE CRANKSHAFT POSITION SENSOR RELAY — -=■ OPERATING POWER & MONITOR CAMSHAFT POSITION SENSORS 2x RADIATOR OUTLET TEMPERATURE SENSOR DMTL ^OXYGEN SENSOR 2X liUi / A PRE & POST k jri /^) T]r CATCONV. _ y - » - 0 SENSOR W - i vjj MONITORING ^ 1 ^ CRUISE CONTROL^ CLUTCH SWITCH SPORT SWITCH OIL TEMP SENSOR SPEED INPUT DSC ROLLING CODE MS45 POWER SUPPLY N AIR MANAGEMENT FUEL MANAGEMENT IGNITION MANAGEMENT EMISSION MANAGEMENT PERFORMANCE CONTROL B+ ECM RELAY 4 HI BSD RESONANCE- TURBULENCE ALTERNATOR INTAKE SYSTEM MOTOR DRIVEN THROTTLE VALVE ENGINE THROTTLE WARNING FUEL PUMP RELAY CONTROL SEQUENTIAL FUEL INJECTOR CONTROL (6X) IGNITION COILS CONTROL (6X) SECONDARY AIR INJECTION RELAY, - CONTROL f p J T_ SECONDARY AIR INJECTION PUMP PRE¬ CAT (2X) POST-1 CAT (2X) MAP- CONTROLLED HEATED THERMOSTAT DMTL 02 SENSOR HEATING PURGE VALVE CONTROL MALFUNCTION INDICATOR LIGHT Ca INTAKE VANOS SOLENOID EXHAUST VANOS SOLENOID COMPRESSOR CLUTCH AC COMPRESSOR ELECTRIC FAN PT CAN DIAGNOSIS ITCM DSC id - f/S- - /Mi L_L^: GT-1 OBDII SCAN TOOL DISplus 15 Engine Electronics IPO’s MS45.1: Inputs - Processing - Outputs KL 15 -data AIRMAS S SIGNAL NpV^-^INTAKE AIRTEMFf THROTTLE POSITION ENGINE TEMPERATURE CRANKSHAFT POSITION SENSOR H CAMSHAFT POSITION KNOCK SENSORS RADIATOR OUTLET TEMPERATURE SENSOR • iopopo DMTL OXYGEN SENSOF ^ m6nitoring TO o CRUISE CONTROL CLUTCH SWITCH SPORT SWITCH OIL TEMP SENSOR BRAKE LIGHT SWITCH BRAKE LIGHT TEST SWITCH 'Y -i, v > - IHKA PT CAN OIL PRESSURE SWITCH VEHICLE SPEED INPUT CAS DSC ROLLING CODE MS45.1 POWER SUPPLY AIR MANAGEMENT FUEL MANAGEMENT IGNITION MANAGEMENT A= i INTEGRAL BAROMETRIC PRESSURE SENSOR EMISSION MANAGEMENT Cl \ PERFORMANCE MANAGEMENT B+ ECM RELAY -t IBS BSD ALTERNATOR RESONANCE- TURBULENCE INTAKE SYSTEM IDLE CONTROL VALVE MOTOR DRIVEN THROTTLE VALVE ENGINETHROTTLE WARNING ■t EML FUEL PUMP RELAY CONTROL 5 4> J FUEL INJECTION RELAY SEQUENTIAL FUEL INJECTION CONTROL (6X) IGNITION COILS CONTROL (6X) SECONDARY AIR INJECTION RELAY CONTROL S SECONDARY AIR INJECTION PUMP PRE¬ CAT (2X) MAP- CONTROLLED J[ HEATED THERMOSTAT l P c°at T 'I sensor ¥ W HEATING PURGE VALVE “CONTROL MALFUNCTION INDICATOR E-BOX FAN INTAKE VANOS SOLENOID EXHAUST V ANOS SOLENOID PT CAN STARTER (2X) IHKA ^PTCAN DIAGNOSIS 1 11 AC COMPRESSOR ELECTRIC FAN GT-1 OBD II SCAN TOOL DISplus 16 Engine Electronics IPO’s ME 9.2: Inputs - Processing - Outputs VALVETRONIC CONTROL MODULE AIRMASS SIGNAL db co&Jtfri SEhSftft.fiV_ V SEPOM CAM. SEWS OR (4X) KNOCK SENSOR (4X) DMTL RADIATOR OUTLET TEMPERATURE SENSOR 4PUKE LIGHT fWTTCH DCS VEHICLE SPEED GENERATOR hbhr CAS IVM B+ IGNITION COILS INJECTORS OXYGEN SENSORS VALVETRONIC CONTROL MODULE VALVETRONIC CONTROL MODULE VARIABLE EUcnKTMiniA VALVETRONIC MOTOR & VALVE ■ ,1 rUtL INJECTORS «8X) FUEL PUMP MTKftcoiL CCWTROL 0H) °2 SENSOR HEATIHD SECONDARY AIR PUMP RELAY CAT HEATED THERMOSTAT + + pjnae STARTER IVM _ relay! motofTCL Mix. fan MOTOR DISplus 31 ISO 9141 PROTOCd CUD i 17 Engine Electronics IPO’s MED 9.2.1: Inputs - Processing - Outputs HLli KL 15-AAKDJ^ IO.i£E 51 ■ "'I ACCELERATOR PEDAL MODULE MU- Q- mxwax ceursKn MODULE, S->ah S^n&o* I a*J r«TL d -mlhotoh Hrn.LT J TFWFFftOTTiFIF JE*«Cn "DLunr r-DDC -rLTLTLTL KL ME C*l • r[ .... i .: CnUIEL TChTRQi '# DSC P W HH cii :c4i^ ■ \ MED 9.2.1 ECIVI 1 POWER SUPPLY AIR MANAGEMENT FUEL MAtt*GEMEUT IGNITION MANAGEMENT PHT-Q-*. ■ ^ 11 :ivi !■■■_ SLMHir, EMISSION MANAGEMENT PERFORMANCE MANAGEMENT ■50 DM I PFOTIKai. 18 Engine Electronics IPO’s MED 9.2.1: Inputs - Processing - Outputs I w HL 13 Hi hL 1 -j 'TAiAKElIH' — m-see CMS 31 N k.' me lit'lira ■ WuP ECliMn f fcAILEtffcfiSLJftll SEuftiMl rjl- WHOU*. Fi'i ii:'i.ii: 3 * □ h'HhHti rv«nsnr QH MED 9.2.1 ECM 2 POWER SUPPLY AIR MANAGEMENT FUEL MANAGEMENT cut MS-CUP J \ HMV / AttL CTflftj- ISNiTiON MANAGEMENT ^conwY Al= PUW* PCDW EMISSION MANAGEMENT PERFORMANCE MANAGEMENT T Fu*i SKttfl Wvd fifml OvHiillly Canlrcl V.ilh-j ■B^imOWCClL •"SHTRflL u y &fh*GR IICA71HD if r-'Jr. niismuvE HJ1HAUTT FLAP rilJI EMQiD h'AHDS 1 . 1*1 lCk^L cAh i-uti Km* 19 Engine Electronics IPO’s KL SO MED 9.2.3: DME Interface (N62) 20 Engine Electronics IPO’s Index Explanation Alternator Coolant temperature sensor at radiator outlet Oil pressure switch Electric fan (engine cooling) VALVETRONIC relay VALVETRONIC control unit Magnetic clutch, A/C compressor DME control unit (Digital Motor Electronics) Diagnosis module for fuel tank leakage (DMTL) Safety battery terminal Intelligent battery sensor Transfer box control unit Electric fuel pump (EKP) EKP relay Junction box control unit CAS control unit (Car Access System) EGS control unit (Electronic Transmission Control) Brake light switch Diagnosis connection 21 Engine Electronics IPO’s MSV70: Inputs - Processing - Outputs 22 Engine Electronics IPO’s Index Explanation Index Explanation 1 DME (ECM) 38 Diagnosis connection 2 Integral ambient temperature sensor 39 Valvetronic relay 3 Integral ambient pressure sensor 40 Oxygen Sensor 4 DME (ECM) main relay 41 Oxygen Sensor 5 DM-TL 42 Oxygen Sensor 6 IHKA 43 Oxygen Sensor 7 Electric engine cooling fan 44 Valvetronic motor 8 E-Box fan 45 Knock sensor (cyl 1 -3) 9 Characteristic map thermostat 46 Knock sensor (cyl 4-6) 10 Crankcase ventilation heater 47 Eccentric shaft sensor 11 Crankcase ventilation heater relay 48 Hot-film air mass meter (HFM) 12 Secondary air pump 49 Exhaust camshaft sensor 13 Secondary air pump relay 50 Intake camshaft sensor 14 HFM for Secondary air 51 Crankshaft sensor 15 Fuel tank vent valve (TEV) 52 DISA actuator 16 VANOS solenoid valve (Intake cam) 53 DISA Actuator 17 VANOS solenoid valve (Exhaust cam) 54 Electric Throttle Valve (EDK) 18 Electro-magnet for airflap control (not for US) 55 Accelerator Pedal Module (FPM) 19-24 Fuel injectors 56 SPORT button 25 Fuel injector relay 57 Coolant temperature sensor (engine temp) 26-31 Ignition coils 58 Coolant temperature sensor (radiator outlet) 32 Electric coolant pump 59 DSC module 33 Intelligent Battery Sensor (IBS) 60 Brake Light Switch (BLS) 34 Alternator 61 Clutch switch 35 Oil Condition Sensor (OZS) 62 Car Access System (CAS) 36 Ground connection 63 Differential pressure sensor 37 PT-CAN 64 Oil pressure switch 23 Engine Electronics IPO’s MSV80 (N52KP): DME Interface 24 Engine Electronics IPO’s Index Explanation Alternator Coolant temperature sensor at radiator outlet Oil pressure switch Electric coolant pump (EWP) Electric fan (engine cooling) Magnetic clutch, A/C compressor DME control unit (Digital Motor Electronics) Diagnosis module for fuel tank leakage (DMTL) Safety battery terminal Intelligent battery sensor Transfer box control unit Electric fuel pump (EKP) EKP relay EKP module (only ECE) Junction box control unit CAS control unit (Car Access System) EGS control unit (Electronic Transmission Control) Brake light switch Diagnosis connection 25 Engine Electronics IPO’s ■'I M MSD80 (E9x): Inputs - Processing - Outputs 26 Engine Electronics IPO’s 27 Engine Electronics IPO’s MSD80 (E7x): Inputs - Processing - Outputs 28 Engine Electronics IPO’s 29 Engine Electronics IPO’s MSD80 (N52): DME Interface ISTA wiring schematic: SSP-BSB-T6109024 Motor interface N52 30 Engine Electronics IPO’s MSD81 (N54): DME Interface M87 K2 K6341 ISTA wiring schematic: SSP-BSB-T6109019 Motor interface N54 31 Engine Electronics IPO’s MEVD17.2 (N55): DME Interface ISTA wiring schematic: SSP-BSB-T6109023 Motor interface N55 32 Engine Electronics IPO’s Index Explanation 1 Digital Motor Electronics 2 Electric air flap control 3 Mechanical air flap control 4 Electric fan 5 Starter 6 A/C compressor 7 Front power distribution box 8 Junction box electronics 9 Junction box 10 Integrated Chassis Management 11 Fuel tank leak diagnostic module 12 Electronic fuel pump controller 13 Rear power distribution box 14 Intelligent battery sensor 15 Battery power distribution box 16 Exhaust flap changeover valve 17 Diagnosis socket (engine speed signal) 18 Accelerator pedal module 19 Instrument cluster 20 Car Access System 21 Central Gateway Module 33 Engine Electronics IPO’s MEVD17.2 (N55): Inputs - Processing - Outputs 34 Engine Electronics IPO’s Index Explanation Index Explanation 1 Engine electronics Valvetronic, direct injection 17.2 MEVD17.2 35-40 Ignition coils 2 Ambient pressure sensor 41 Engine breather heater 3 Temperature sensor 42 Ground connections 4 Brake light switch 43 Oxygen sensor after catalytic converter 5 Starter 44 Oxygen sensor before catalytic converter 6 Car Access System (CAS) 45 Diagnostic socket 7 Clutch module 46 Low-pressure fuel sensor 8 Electronic fuel pump control (EKPS) 47 Intake manifold pressure sensor after throttle valve 9 Electric fuel pump 48 Fuel rail pressure sensor 10 Terminal 15N relay 49 Charge air temperature and pressure sensor 11 A/C compressor 50 Knock sensor, cylinders 1 - 3 12 Coolant pump 51 Knock sensor, cylinders 4 - 6 13 Valvetronic relay 52 Hot-film air mass meter (HFM) 14 Junction Box Electronics (JBE) 53 Intake camshaft sensor 15 Refrigerant pressure sensor 54 Exhaust camshaft sensor 16 Relay, ignition and injection 55 Crankshaft sensor 17 Terminal 30B relay 56 Accelerator Pedal Module (FPM) 18 Fuel tank leak diagnosis module (DMTL) 57 Throttle valve (MDK) 19 Electric fan relay 58 Coolant temperature sensor at engine outlet 20 Electric fan 59 Oil pressure sensor 21 Characteristic map thermostat 60 Oil temperature sensor 22 Diverter valve 61 Valvetronic servomotor 23 Fuel tank vent valve 62 Oil condition sensor 24 VANOS solenoid valve, intake camshaft 63 Alternator 25 VANOS solenoid valve, exhaust camshaft 64 Active cooling air flap control 26 Oil pressure control valve 65 Intelligent battery sensor (IBS) 27 Electropneumatic pressure converter (EPDW) for wastegate valve 66 Dynamic stability control (DSC) 28 Quantity control valve 67 Central Gateway Module (ZGM) 29-34 Fuel injectors 68 Integrated Chassis Management (ICM) 35 Engine Electronics IPO’s MEVD17.2 Control Unit The N55 engine is equipped with the Bosch engine management MEVD17.2 : • The MEVD17.2 is integrated in the intake system and is cooled by the intake air. • The MEVD17.2 is FlexRay-compatible and directly supplies voltage to the sensors and actuators. The top side of the DME housing also serves as the bottom section of the intake manifold. The housing is contoured in the area of the intake manifold to ensure optimum air flow. An 0 ring type seal is installed between the DME housing and the intake. The plug connections between the wiring harness and DME are water-tight. N55, engine management MEVD17.2 Index Explanation 1 Engine wiring harness, sensor 1 (Module 100) 2 Engine wiring harness, sensor 2 (Module 200) 3 Connection, vehicle wiring harness (Module 300) 4 Engine wiring harness, Valvetronic (Module 400) 5 Connection, voltage supply (Module 500) 6 Engine wiring harness, injection and ignition (Module 600) 36 Engine Electronics IPO’s For the first time, an engine-mounted Digital Motor Electronics (DME) module is used. The DME is bolted to the intake manifold and is cooled by the intake air. The engine mounted DME has the following advantages: • Engine wiring harness is divided into six individual modules • All electrical components on the engine are supplied directly via the DME • The E-box is no longer need • 211 pins are available • The plug-in connectors are water-tight N55, wiring harness routing 37 Engine Electronics IPO’s MSD85 (N63): DME Interface ISTA wiring schematic: SSP-BSB-T6109021 Motor interface N63 38 Engine Electronics IPO’s Index Explanation Index Explanation 1 Central gateway module 13 Junction box power distributor 2 Dynamic Stability Control 14 Electronic fuel pump controller 3 Starter 15 Power distributor, rear right 4 Active cooling air flaps 16 Power distributor, battery 5 Passive cooling air flaps 17 Exhaust flaps 6 Electric fan 18 Intelligent battery sensor 7 Coolant temperature sensor at radiator outlet 19 Electric fan relay 8 MSD85 20 Fuel tank leak diagnostic module 9 Electric auxiliary coolant pump for charge air cooling 21 Integrated Chassis Management 10 DME main relay 22 Accelerator pedal module 11 A/C compressor 23 Instrument cluster 12 Junction box electronics 24 Car Access System 39 Engine Electronics IPO’s MSD85 Control Unit Due to the changes brought about with the new N63 engine, the engine management system has been adapted accordingly. The new system, designated MSD85, works in conjunction with the High Precision Injection (HPI) system which is familiar from the N54 engine. The high level of technology on the N63 engine place high demands on the DME sys¬ tem. The ECM used features a very powerful 150 MHz processor and features a new connector concept. The connector concept consists of five chambers and functional configuration. This means each chamber is assigned to a specific function group. The following list outlines the configuration of the chambers in corresponding order: • Chamber 1 (8 pins): Ignition • Chamber 2 (59 pins): Engine plug, cylinder bank 1 and several central engine functions • Chamber 3 (40 pins): Vehicle plug • Chamber 4 (54 pins): Engine plug, cylinder bank 2 and several central engine functions • Chamber 5 (16 pins): Fuel injection An engine plug relates to sensor/actuator connections on the engine while the vehicle plug represents the interface to the vehicle specific components. The functions of the engine management system are described in the respective systems. 40 Engine Electronics IPO’s The N63 engine is controlled by the MSD85. This control unit has been modified to make it compatible with the FlexRay bus. The control unit is located to the front of the right-side spring strut dome. This control unit is liquid-cooled rather than air-cooled. For this purpose, the housing of the control unit features two windings in the one coolant line, which is connected to the low temperature cooling circuit for charge air cooling. The lower section of the electronics box is open to the outside. The upper section, which contains the connections, has a watertight seal. Cooling of the engine control unit of the N63 engine Index Explanation Index Explanation 1 Sealing frame 5 Coolant line 2 Electronics box cover 6 Engine control unit 3 Coolant return 7 Electronics box 4 Coolant supply 41 Engine Electronics IPO’s MSD87-12 (N74): DME Interface ISTA wiring schematic: SSP-BSB-T6109020 Motor interface N74 42 Engine Electronics IPO’s MSD87-12: Control Unit Two water-cooled MSD87-12 control units are used. The same water tight components as those on the MSD85 (N63 engine in the F01) have been used. As on the predeces¬ sor engine N73, a primary (master) and secondary concept strategy has been imple¬ mented with the two control units. They have the same hardware, software and data records. The connected sensor system runs an automatic primary (master) and sec¬ ondary identification. In this arrangement, the master is responsible for communication with the complete vehicle and the specified nominal values for the engine functions. The control unit is designed with the current software for the vehicle network with FlexRay. 43 Engine Electronics IPO’s 44 Engine Electronics IPO’s