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Mercedes-Benz

Vehicle Communication

Software Manual

August 2013

EAZ0025B41D Rev. A

Summary of content (114 pages)

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Mercedes-Benz Vehicle Communication Software Manual August 2013 EAZ0025B41D Rev.
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Trademarks Acknowledgements Snap-on is a trademark of Snap-on Incorporated. All other marks are trademarks of their respective holders. Copyright Information ©2013 Snap-on Incorporated All rights reserved. Disclaimer The information, specifications and illustrations in this manual are based on the latest information available at the time of printing. Snap-on reserves the right to make changes at any time without notice. Visit our Web site at: http://diagnostics.snapon.
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Safety Information For your own safety and the safety of others, and to prevent damage to the equipment and vehicles upon which it is used, it is important that the accompanying Safety Information be read and understood by all persons operating, or coming into contact with, the equipment. We suggest you store a copy near the unit in sight of the operator This product is intended for use by properly trained and skilled professional automotive technicians.
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Safety Information Important Safety Instructions Safety messages contain three different type styles. • Normal type states the hazard. • Bold type states how to avoid the hazard. • Italic type states the possible consequences of not avoiding the hazard. An icon, when present, gives a graphical description of the potential hazard. Example: ! WARNING Risk of unexpected vehicle movement. • Block drive wheels before performing a test with engine running. A moving vehicle can cause injury.
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Contents Safety Information ..................................................................................................................... iii Contents ...................................................................................................................................... v Chapter 1: Using This Manual ................................................................................................... 1 Conventions.........................................................................
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Contents Appendix B: Terms, Abbreviations and Acronyms............................................................. 100 Terms ....................................................................................................................................... 100 Abbreviations and Acronyms.................................................................................................... 100 Index ............................................................................................................
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Chapter 1 Using This Manual This manual contains instructions for testing Mercedes-Benz vehicles. Some of the Illustrations shown in this manual may contain modules and optional equipment that are not included on your system. Contact your sales representative for availability of accessories and optional equipment. 1.1 Conventions This manual uses the conventions described below. 1.1.1 Bold Text Bold text is used for emphasis and to highlight selectable items such as buttons and menu options.
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Using This Manual Notes and Important Messages Scan Tool The term “scan tool” is used to refer to any tool that communicates directly with the vehicle data stream. When necessary, the term “Scanner” is used to distinguish Snap-on equipment from another diagnostic device, such as the Mercedes-Benz factory scan tool. 1.2 Notes and Important Messages The following messages appear throughout this manual. 1.2.1 Notes A NOTE provides helpful information such as explanations, tips, and comments.
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Chapter 2 Introduction The Mercedes-Benz Vehicle Communication Software provides extensive vehicle-specific engine, transmission, antilock brake system (ABS) and airbag trouble codes, and selected functional tests. This manual is designed to guide you through control systems tests of Mercedes-Benz vehicles. The first two sections of this manual overview safety and usage conventions.
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Operations Chapter 3 Identifying the Vehicle The Scanner typically identifies a vehicle using certain characters of the vehicle identification number (VIN). The Scanner vehicle identification (ID) process prompts to you enter VIN characters and answer questions about the vehicle to be tested. For some vehicles, the Scanner may display two or more engine choices. Be sure to scroll to confirm the number of engine choices.
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Operations Identifying the Vehicle Table 3-1 VIN selections for North American vehicles (sheet 2 of 2) VIN Engine Selection VIN AJ76 155.980 used on 2005 models VIN FA68 113.961 used on 1999–2002 models VIN FA76 120.983 used on 1997–2002 models VIN KK47 111.973 used on 1998–2000 models VIN KK49 111.983 used on 2001–2004 models VIN KK65 112.947 used on 2001–2004 models VIN KK66 112.960 used on 2002–2004 models VIN PJ74 113.991 used on 2003 models VIN PJ75 113.
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Operations Selecting a System Selecting a System Once you have confirmed a vehicle identification, the System List menu displays. This menu shows all the systems available for testing. z Note the following when selecting a system for testing: • The terms “left” and “right” refer to separate engine bank control systems for 12-cylinder engines and assume left and right from the position of a seated driver. OBD-II terminology uses Bank 1 and Bank 2.
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Operations Connecting to a Vehicle Figure 3-1 MB-1 adapter Figure 3-2 MB-2A adapter Figure 3-3 DL-16 Each test adapter connects to one of the following vehicle diagnostic connectors.
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Operations Connecting to a Vehicle Pin 1 2 3 Function Pin Ground, circuit 31 (W12, W15, electronics ground) Voltage, circuit 87 or 15z Voltage, circuit 30 14 15 Electronic diesel system Electronic distributor-type fuel injection (diesel) 16 5 6 7 8 9 10 11 12 13 HFM sequential multiport fuel injection/ ignition LH sequential multiport fuel injection, engines 104, 119, 120 (right) ME sequential multiport fuel injection/ ignition, engines 119, 120 (right) LH sequential multiport fuel injection, en
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Operations Connecting to a Vehicle US Models California Models Only (With LED) Pin Function Pin 1 2 3 4 5 6 Ground Not used Continuous fuel injection Electronic diesel system 4MATIC Airbag/ETR (SRS) Air conditioning (model 124) Roll bar (model 129) Distributor ignition HFM sequential multiport fuel injection/ ignition 1 2 7 8 3 4 5 6 7 Distributor ignition 8 Pressurized engine control 9 10 11 12 13 14 Adaptive damping system Roll bar (model 124) TN-signal (gasoline) Anti-theft alarm Remote c
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Operations Connecting to a Vehicle Pin 1 2 3 4 5 6 7 8 Function Ground Not used Continuous fuel injection Diesel injection system Electronic idle speed control Electronic diesel Automatic locking differential Automatic-engaged 4WD (model 124 only) Airbag Air conditioning Not used Figure 3-6 8-pin connector—fits MB-2 adapter Pin Function Pin 1 Not used 9 2 3 4 5 6 7 8 Not used TNA-signal (gasoline) Circuit 31, ground Circuit 31, electric ground CAN interior bus (H) Motor electronics (ME) Circuit
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Operations Selecting a Test z Note the following when connecting the Scanner to the vehicle: • “Left” or “Right,” when included in the connection message, assumes that you are seated in the driver seat. • When the connection message screen refers to the MB-2 adapter, use the MB-2A adapter. • The MB-1 and DL-16 adapters require a Personality Key™. See the on-screen connection instructions for the vehicle you are testing for the correct Personality Key™.
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Operations Main Menu Selections available, The type of data available, and the order in which the groups are listed varies by model.
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Operations Scanner Demonstration Program Special Functions This selection opens a menu of unique tests, such as relearn procedures. Follow the on-screen instructions to check status and reprogram learned values. Review Coding This test displays the programmed VIN number and other relevant information. Review ECU ID This test displays ECU identification information. Highlight and select Review ECU ID to access the information.
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Chapter 4 Testing This chapter provides limited information and procedures for the following control systems: • Engine (gas) – CIS-E – LH – HFM – ME versions 1.0, 2.0, 2.1, 2.7, 2.7.1, 2.8 – SIM4 & SIM4/LSE – PEC – MSM – MME – ME – DI • Engine (diesel) – Anti-Jerk Control, Idle Speed Control (AJC/ISC, ELR) – Electronic Diesel System (EDS) – IFI/DFI/DSV – CDI • Transmission (EAG, EGS, EGS5.
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Testing Testing DAS (Immobilizer) Systems control and traction control (ASR). Vehicles with ASR usually have an orange warning light on the instrument cluster. Table 4-1 1992–96 Mercedes EA/CC/ISC application coverage Series Model 300CE 140 202 Chassis # Engine # 1993–95 124.052/092 104.992 1993 124.028 104.942 1993–95 124.032 104.992 400E 1992–95 124.034 119.975 500E 1992–94 124.036 119.974 300SE 1992–93 140.032 104.990 400SE 1992 140.042 400SEL 1993–95 140.
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Testing Testing DAS (Immobilizer) Systems (IFZ) was introduced in late 1992 as a standard feature. With central locking, lock actuators are no longer connected electrically, therefore the central locking, anti-theft, and convenience systems can no longer be operated with the mechanical key. Instead, a remote control module operates the complete vehicle locking system through the pneumatic control module.
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Testing Testing DAS (Immobilizer) Systems i NOTE: On some models, the green and red LEDs on the rear view mirror flash alternately if the engine will not start because DAS is activated. DAS 2a DAS 2a was used from January to June in 1996 on the E420. Activation and deactivation no longer occur automatically when locking or unlocking the car. Previously, if the vehicle was unlocked, DAS allowed the vehicle to start.
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Testing Testing DAS (Immobilizer) Systems DAS 2b DAS 2b (170/129/140) was introduced in 1998. This system uses a three-button remote with both infrared and radio wave transmissions. The vehicle is locked or unlocked when either the infrared or radio transmits an uninterrupted signal.
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Testing Testing DAS (Immobilizer) Systems Table 4-6 DAS 3 characteristics Triggered By Microprocessor in key Signal Type IR Infrared Authorization Checked By EIS N73 Operator Feedback None Authorized Start Result NO fuel injection; NO ignition switch; NO steering lock release Note the following when working on DAS 3 systems: • The electronic key is completely separate from the remote key access system and does not require the transmitter battery of the remote control.
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Testing Testing DAS (Immobilizer) Systems capacitive sensors. The 2nd generation Keyless Go no longer uses a separate chip card but has the Keyless Go chip card integrated into the remote key housing. Note the following with the Keyless Go: • Some Keyless Go vehicles may not have any emergency key door access. In the case of a dead battery, the emergency key can be used to open trunk to access battery, which can then be charged. The remote key is then used to open the doors.
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Chapter 5 Data Parameters When DATA is selected, the Scanner displays all of the operating parameters available from the electronic control unit (ECU) of the vehicle. The ECU provides two basic kinds of parameters: digital (or discrete) and analog: • Digital (discrete) parameters are those that can be in only one of two states, such as on or off, open or closed, high or low, rich or lean, and yes or no.
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Data Parameters Alphabetical Parameter List Alphabetical Parameter List Numerics 3RD GEAR DOWN......................................................................................................................................................... 3RD GEAR UP ............................................................................................................................................................... 4TH GEAR DOWN ............................................................................
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Data Parameters Alphabetical Parameter List AIR PUMP SWITCHOVER VALVE, LEFT ..................................................................................................................... AIR PUMP SWITCHOVER VALVE, RIGHT ................................................................................................................... AIR PUMP ...............................................................................................................................................................
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Data Parameters Alphabetical Parameter List CLUTCH DEPRESSED.................................................................................................................................................. CLUTCH SWITCH.......................................................................................................................................................... CNTRL VALVE CURRENT-MP(current)(ma) ....................................................................................................
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Data Parameters Alphabetical Parameter List CRUISE CONTROL SWITCH B..................................................................................................................................... CRUISE CONTROL SWITCH DECELERATE ............................................................................................................... CRUISE CONTROL SWITCH ........................................................................................................................................
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Data Parameters Alphabetical Parameter List ECT SENSOR ................................................................................................................................................................ ECT VALUE RANGE...................................................................................................................................................... EFFECT.COOL.FAN OUTPUT DUTY CYCLE................................................................................................
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Data Parameters Alphabetical Parameter List FUEL TANK CAP ........................................................................................................................................................... FUEL TANK LEVEL........................................................................................................................................................ FUEL TEMPERATURE ................................................................................................................
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Data Parameters Alphabetical Parameter List INCREASED MODULATING PRESS.STATUS ............................................................................................................. INDICATED ENGINE TORQUE ..................................................................................................................................... INDUCED TORQUE(Nm)...............................................................................................................................................
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Data Parameters Alphabetical Parameter List KNOCK SIGNAL............................................................................................................................................................. 62 L LAMBDA CONTROL ACTIVE ........................................................................................................................................ LAMBDA, UPSTREAM CAT, CYL 1 to 12...................................................................................................
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Data Parameters Alphabetical Parameter List MULTIPLE IGN. MISF. TWC PROTECT........................................................................................................................ MULTIPLE IGN. MISFIRE EMISS. LIM.......................................................................................................................... MULTIPLE IGN. MISFIRE I/M PROGR..........................................................................................................................
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Data Parameters Alphabetical Parameter List O2S CONTROL, UPSTREAM CAT(%) .......................................................................................................................... O2S DOWNSTREAM CAT, CYL 1 to 12........................................................................................................................ O2S DOWNSTREAM CAT, LEFT ..................................................................................................................................
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Data Parameters Alphabetical Parameter List PURGE FACTOR F 4..................................................................................................................................................... PURGE VALVE DUTY CYCLE ...................................................................................................................................... PURGING........................................................................................................................................
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Data Parameters Alphabetical Parameter List SELF-ADAPTATION, IDLE SPEED ............................................................................................................................... SELF-ADAPTATION, IDLE SPEED ............................................................................................................................... SENSITIZATION FACTOR.......................................................................................................................................
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Data Parameters Alphabetical Parameter List T TANK FILL LEVEL.......................................................................................................................................................... TANK PRESSURE DIFFERENCE ................................................................................................................................. TEMPOMAT SWITCH ...........................................................................................................................
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Data Parameters Alphabetical Parameter List V VALVE CURRENT 1 (MA).............................................................................................................................................. VALVE CURRENT 2 (MA).............................................................................................................................................. VALVE PRESSURE (MBAR) ....................................................................................................................
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Data Parameters Engine Parameters Engine Parameters A/C COMPRESSOR Range: __________________________________________________________ ON/OFF Used on DM2, HFM, ME10 and ME20 systems. This parameter shows the condition of the A/C compressor. The display reads ON with air conditioning compressor activated (engaged). ABS. INT. MANIF. PRESS. DI1 ABS. INT. MANIF. PRESS. DI2 ABS. INTAKE MANIFOLD PRESSURE Range: ______________________________________________ 0 to 1000 or ±100 mbar Used on DM systems.
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Data Parameters Engine Parameters ACTUAL PRESSURE DISTRIB.PIPE Range: _____________________________________________________0 to 1000 mbar Used on ERE/EVE/ASF (IFI Diesel)) systems with turbocharged engines. This parameter displays the actual pressure in the distribution pipe or intake manifold, indicating boost pressure. This parameter relies on the intake manifold pressure sensor (MAP).
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Data Parameters Engine Parameters ADAPT. RANGE 2 GEAR, 6000-3000 ADAPT. RANGE 2 GEAR, 6000-4000 ADAPT. RANGE 4 GEAR, 2500-1500 ADAPTED RANGES L1 ADAPTED RANGES L2 ADAPTED RANGES L3 Range: __________________________________________________________ ON/OFF Used on ME20 systems. These parameters indicate whether the engine and transmission control modules are working together to optimize engine speed and torque for any one given driving condition. ADJUST.
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Data Parameters Engine Parameters AIR LOGIC CHAIN Range: __________________________________________________________ YES/NO Used on DM2 systems. This parameter indicates whether the onboard diagnostic secondary air system tests have run (YES) or not run (NO). AIR MASS Range: ________________________________________ 0 to 500 kg/h or 0 to 500 mg/S Used on DM2, EDS, ERE/EVE/ASF (IFI Diesel)), HFM, ME10, ME20 and SIM4 systems.
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Data Parameters Engine Parameters BAROMETRIC PRESSURE ALTITUDE PRESSURE Range: ________________________________________________0 to 1000, ±100 mbar AMBIENT PRESSURE Range: _____________________________________________________ 0 to 1000 kPa) Barometric Pressure is used on CD12, EAG, EDS, ERE/EVE/ASF (IFI Diesel)), EZ, LH, and HFM systems. Altitude Pressure and Ambient Pressure are used on SIM4 systems.
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Data Parameters Engine Parameters ensure communication if one wire is damaged and provide the ability to recognize a CAN circuit fault. The two lines must not be interchanged as each represents either high or low level. BRAKE SWITCH Range: __________________________________________________________ ON/OFF Used on ME10 systems. This parameter is an ECU input that indicates brake pedal position. The display should read ON with the brake pedal depressed and OFF at all other times.
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Data Parameters Engine Parameters CAMSHAFT SIGNAL, RIGHT BANK CAMSHAFT SIGNAL, LEFT BANK Range: __________________________________________________________ YES/NO Used on ME27 and ME28 systems. These parameters indicate whether there are camshaft signals from the left and right engine banks. CAMSHAFT SOLENOID Range: __________________________________________________________ ON/OFF Used on HFM systems. This parameter indicates whether the camshaft solenoid is on or off.
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Data Parameters Engine Parameters CAN RECEPTION FROM LH1-SFI CAN RECEPTION FROM LH2-SFI Range: _______________________________________________________ OK/NOT OK Used on EZ and LH systems. These parameters indicate whether the controller area network (CAN) is receiving data from the fuel injection (LH 1-SFI or LH2-SFI) modules. The display should read OK at all times. A NOT OK indicates a loss of communication between the modules.
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Data Parameters Engine Parameters CHECK ENGINE AFTER FULFILLING FAULT SEQUENCE Range: __________________________________________________________ YES/NO Used on ME10 systems. This parameter indicates the check engine light status after an ECU diagnostic self-test. A reading of YES indicates a fault was detected during the self-test and the check engine light should be illuminated. A reading of NO indicates that no faults were present during the self-test.
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Data Parameters Engine Parameters COIL SPARK DURAT. T1/1 CYL. 1/4 COIL SPARK DURAT. T1/1 CYL. 2/5 COIL SPARK DURAT. T1/2 CYL. 2/3 COIL SPARK DURAT. T1/2 CYL. 3/4 COIL SPARK DURAT. T1/3 CYL. 1/6 Range: _________________________________________________________ 0 to 5 ms Used on HFM systems. These parameters represents the spark line duration, or burn time, in milliseconds (ms) from the ignition coils.
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Data Parameters Engine Parameters COOLING FAN OUTPUT DEMAND ENGINE Range: __________________________________________________________ ON/OFF COOL.FAN OUTP.DEMANDED BY ENGINE Range: _________________________________________________________ 0 to 100% Used on HFM and ME20 systems. This parameter indicates whether or not the ECU is commanding the cooling fan to turn on based on engine temperature. The display reads ON or 100% when the ECU is enabling the fan, and OFF or 0% when the ECU disables the fan. COOL.
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Data Parameters Engine Parameters CRUISE CONTROL LEVER POSITION VARIABLE CRUISE CONTROL LEVER SIGNAL IMPLAUSIBLE CRUISE CONTROL OFF CRUISE CONTROL RESTART CRUISE CONTROL SET AND ACCELERATE CRUISE CONTROL SET AND DECELERATE Range: __________________________________________________ ACTIVE/INACTIVE Used on SIM4 systems. These parameters represent the status of the cruise control system. The display reads ACTIVE when cruise control is running and INACTIVE when not running.
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Data Parameters Engine Parameters between engines and engine wear. Each change in the Long Term Fuel Trim is equivalent to a change of the Short Term Fuel Trim over its entire range. When the Short Term Fuel Trim reaches its upper/lower limit, it resets back to the beginning, and moves Long Term Fuel Trim up or down by one count. The Short Term Fuel Trim continues to move very quickly and if the limits are reached, it will increment the Long Term Fuel Trim again.
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Data Parameters Engine Parameters parameter name indicates twelve separate parameters, one for each cylinder. The display reads OFF when fuel injection is suspended and ON during normal fuel injection operation. CYLINDER SHUT-OFF 1 to 12 CYLINDER SHUT-OFF VALVE, RIGHT CYLINDER SHUT-OFF VALVE, LEFT Range: __________________________________________________________ ON/OFF Used on ME27 (V12) and ME28 systems.
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Data Parameters Engine Parameters DESIRED ENGINE SPEED Range: _____________________________________________________ 0 to 1500 RPM Used on HFM systems. This parameter indicates the target idle speed that the ECU is attempting to maintain. With a normal running engine, actual and desired engine speeds should be equal or close to each other. DISTRIBUTOR SHAFT ACTUAL POS. DISTRIBUTOR SHAFT NOMINAL POS.
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Data Parameters Engine Parameters ECT LH1 ENGINE COOLANT TEMP. 1 ECT LH2 ENGINE COOLANT TEMP. 2 Range: ________________________________________________________ 0 to 5.00 V Used on DM and LH systems. These parameters display the voltage drop created by the resistance of the engine coolant temperature (ECT) sensors. The ECT is a negative temperature coefficient (NTC) sensor, so resistance decreases as temperature increases.
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Data Parameters Engine Parameters Turbo systems rely on the ECU to vary current to the EGR switchover valve, which regulates vacuum to the EGR valve. The greater the control current, the greater the EGR flow. ELECTRIC AIR PUMP Range: __________________________________________________________ ON/OFF Used on ME27 and ME28 systems. This parameter indicates the state of the electric air pump, on or off. The air is forced into the exhaust manifold through the air pump switchover valve.
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Data Parameters Engine Parameters ENGINE OIL LEVEL Range: _______________________________________________________ OK/NOT OK Used on ME10 systems. This parameter indicates whether there is or is not enough engine oil in the crankcase. Display should read OK at all times. The display only reads NOT OK if the engine oil falls below a certain level, which indicates the possibility of engine damage.
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Data Parameters Engine Parameters EXHAUST GAS TEMPERATURE EXHAUST TEMPERATURE (TWC MODEL) Range: ______________________________________________________ not available Used on HFM, LH, ME10, ME27 and ME28 systems. These parameters are the ECU calculated exhaust gas temperature based on multiple input signals, and shows exhaust gas temperature. The measurement units can be changed from degrees Celsius (°C) to degrees Fahrenheit (°F).
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Data Parameters Engine Parameters FUEL RACK POSITION Range: __________________________________________________________ variable Used on EDS diesel systems. The display shows the fuel rack position in millimeters. With the accelerator not depressed, the display should read approximately 10 mm. The value should increase to about 20 mm at WOT as the accelerator pedal is slowly depressed. FUEL TANK CAP Range: _______________________________________________________ OK/NOT OK Used on ME10 systems.
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Data Parameters Engine Parameters HOT WIRE AIR MASS HOT FILM MASS AIR FLOW SENSOR Range: ______________________________________________________ 0 to 500 kg/h These parameters are an ECU calculation of the mass of the intake air charge in kilograms per hour (kg/h) based on the input of the hot film mass airflow sensor. Normal hot idle values vary depending on engine. In general, readings from 15 to 30 kg/h are normal for a hot engine running at idle with all accessories switched off.
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Data Parameters Engine Parameters IFI/DFI RECEIVING FROM ETC (722.6) Range: __________________________________________________________ ON/OFF IFI/DFI RECEIVING FROM ETS/ABS IFI/DFI RECEIVING FROM ETS/ABS/ASR IFI/DFI RECEIVING MESSAGE 1 FROM IC IFI/DFI RECEIVING MESSAGE 2 FROM IC IFI/DFI TRANSM. TO ASR/ESP/ A/C /ETC IFI/DFI TRANSM. TO IC/ASR/ETC (722.
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Data Parameters Engine Parameters INERTIA FUEL SHUTOFF Range: _________________________________________________ ON/OFF or YES/NO Used on ME27 and ME28 systems. This parameter indicates if the ECU has temporarily shut off fuel injection during deceleration to reduce emissions. The display reads ON or YES if the ECU commands the injectors off during deceleration, and reads OFF or NO at all other times.
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Data Parameters Engine Parameters INJECTION TIME, LEFT BANK INJECTION TIME, RIGHT BANK INJECTION TIME, CYLINDER 1 to 3 INJECTION TIME, CYLINDER 4 to 6 INJECTION TIME, CYLINDER 10 to 12 Range: __________________________________________________________ variable Used on ME27 and ME28 systems. These parameters display the injector on time in milliseconds (ms) for either bank or cylinder groups. Display varies by engine, speed, and load. Typical range for normal hot idle readings are 2 to 5 ms.
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Data Parameters Engine Parameters IRREGULAR RUNNING SHUTOFF VALUE Range: __________________________________________________________ variable Used on ME27 and ME28 systems. The ECU computes this time variable for different RPM/load ranges as an indicator of engine smoothness based on crankshaft sensor input. The ECU calculates this time variable either once per second (1/s) or twice per second (1/s2). If engine smoothness deteriorates, this number increases.
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Data Parameters Engine Parameters center. Rather, it indicates the number of degrees of advance subtracted per cylinder until detonation stops. KNOCK SENSOR KNOCK SENSOR SIGNALS KNOCK SENSOR CYLINDER 1 to 4 KNOCK SENSOR FRONT KNOCK SENSOR LEFT KNOCK SENSOR LEFT FRONT KNOCK SENSOR LEFT REAR KNOCK SENSOR REAR KNOCK SENSOR RIGHT KNOCK SENSOR RIGHT FRONT KNOCK SENSOR RIGHT REAR Range: ________________________________________________________ 0 to 5.
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Data Parameters Engine Parameters check is to add both readings (R1 and R2) together at various throttle positions. They should add up to the same value, usually between 4.5 to 4.9 volts. LEAN/RICH RESPONSE TIME Range: _______________________________________________________ 0 to 200 ms Used on DM2 systems. This parameter is the lean to rich response time, or rise time, of the oxygen sensor (O2S) in milliseconds (ms).
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Data Parameters Engine Parameters LEFT WOT (FULL LOAD)/DECEL.SHUT-OFF Range: __________________________________________________________ YES/NO Used on ME10 systems. This parameter indicates whether or not the ECU has shut off fuel delivery to the left cylinder bank to reduce emissions on deceleration. Display should read YES on deceleration following wide-open throttle (WOT) and NO at all other times.
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Data Parameters Engine Parameters LOWER P. LOAD F. TRIM CYL 1-6, RIGHT LOWER P. LOAD F. TRIM CYL 4-6, RIGHT LOWER P. LOAD F. TRIM CYL 7-9, LEFT LOWER P. LOAD F. TRIM CYL 10-12, LEFT Range: __________________________________________________________ variable Used on ME27 and ME28 systems. These fuel trim numbers represent the long term correction to the fuel injection pulse width when the engine is under partial load.
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Data Parameters Engine Parameters MAX. INDICATED ENGINE TORQUE MIN. INDICATED ENGINE TORQUE Range: __________________________________________________________ variable Used on HFM systems. These parameters display the ECU-calculated minimum and maximum engine torque in Newton meters (Nm). MISF.RECOGN. SH-OFF THRESHLD Range: __________________________________________________________ variable Used on ME10 and ME20 systems.
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Data Parameters Engine Parameters engines have an airflow sensor to measure the mass, or weight, of air entering the engine. The airflow sensor delivers a signal that indicates the mass airflow in milligrams per second at any given instant. The ECU uses the signal from the airflow sensor and other sensors to determine the air-fuel ratio needed by the engine and the amount of fuel to be injected.
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Data Parameters Engine Parameters O2 SENSOR, DOWNSTREAM CAT, CYL 1-3; 4-6; 7-9; 10-12 O2 SENSOR, DOWNSTREAM CAT O2 SENSOR, DOWNSTREAM CAT, LEFT O2 SENSOR, DOWNSTREAM CAT, RIGHT O2 SENSOR, UPSTREAM CAT, CYL 1-3; 4-6; 7-9; 10-12 O2 SENSOR, UPSTREAM CAT O2 SENSOR, UPSTREAM CAT, LEFT O2 SENSOR, UPSTREAM CAT, RIGHT Range: ________________________________________________________ 0 to 2.00 V Used on ME27 and ME28 systems. The terms “1-3,” “4-6,” “7-9,” and “10-12” refer to four separate groups of parameters.
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Data Parameters Engine Parameters O2S (LAMBDA) CTRL CTP (IDLE) MEAN Range: _________________________________________________________ 0 to 100% Used on HFM systems. This is the average short-term fuel metering correction required at idle to maintain a stoichiometric (14.7:1), or 1.0 Lambda, air-fuel ratio. The display shows the correction factor as a percentage of total injector on time. O2S (LAMBDA) CTRL PART.
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Data Parameters Engine Parameters O2S VOLTAGE AFTER TWC O2S VOLTAGE AFTER TWC LEFT O2S VOLTAGE AFTER TWC RIGHT Range: ______________________________________________________ 0 to 1000 mV Used on ME10 and ME20 systems. These parameters are the feedback voltage signals delivered to the ECU by the downstream oxygen sensors (O2S). Normally, with a good catalytic converter, with engine fully warmed up, and in closed loop operation, the display should show a steady voltage reading within the operating range.
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Data Parameters Engine Parameters 50% duty cycle is the base point, so a 50% reading indicates no ECU fuel correction. Readings above 50% indicate the ECU is correcting a lean condition, readings below 50% indicate the ECU is reducing fuel. OUTPUT DEMAND DUTY CYCLE Range: _________________________________________________________ 0 to 100% Used on ME20 systems. This parameter displays the duty cycle of the ECU output to the engine cooling fan. The display is only active when the fan is operating.
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Data Parameters Engine Parameters systems, the data parameter display ranges from 0.680 to 1.320; on ME27 systems, from 0.750 to 1.280. PEDAL VALUE SENSOR SIGNAL 1 PEDAL VALUE SNSR REF.POT.MTR R1 PEDAL VALUE SENSOR SIGNAL 2 PEDAL VALUE SNSR REF.POT.MTR R2 Range: ________________________________________________________ 0 to 5.00 V Used on ME10, ME20, ME27, ME28, and SIM4 systems. These parameters display the ECU input signals from the pedal position and electronic throttle actuator sensors.
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Data Parameters Engine Parameters PURGE VALVE DUTY CYCLE Range: __________________________________________________________ variable Used on HFM, ME10, ME20, ME27, and ME28 systems. The range varies by system: • • • • • HFM; 5 to 15% ME10; 0 to 20% ME20; 0 to 20% ME27; 0 to 95% ME28; 0 to 95% These parameters display the duty cycle of the purge valve, which is the amount of on time the ECU is commanding.
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Data Parameters Engine Parameters RESONANCE FLAP INT. MANIF. ACTUAL RESONANCE FLAP INTAKE PIPE ACTUAL Range: ____________________________________________________ OPEN/CLOSED RESONANCE FLAP INT. LINE NOM. RESONANCE FLAP INT. MANIF. NOMINAL RESONANCE FLAP INTAKE PIPE NOMINAL Range: ______________________________________________________ not available These parameters are used on ERE/EVE/ASF (IFI Diesel)) systems.
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Data Parameters Engine Parameters RIGHT O2S (LAMBDA) CONTROL FAULT Range: __________________________________________________________ YES/NO Used on ME10 systems. This parameter indicates whether or not the ECU has recognized a failure on the left oxygen sensor (O2S), or Lambda control, circuit. The ECU prevents closed loop operation if an O2S fault is detected. The display reads NO during normal operation, a reading of YES indicates a fault is present.
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Data Parameters Engine Parameters SELECTED GEAR Range: ______________________________________________________ P,R,N,1,2,3,4 Used on HFM, LH, ME10, and ME20 systems. This parameter indicates the gear selector lever position. The display shows the selected range position, not the current gear that the transmission is operating in.
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Data Parameters Engine Parameters SELF-ADAPTATION IDLE SP. AIR Range: _____________________________________________ X.XX kg/h or –15 to 15% Used on LH and HFM systems. This parameter displays the closed throttle position (CTP), or idle, correction factor that the ECU is commanding to maintain a steady idle. The display for most systems is in kilograms per hour (kg/h) with zero being the base point. On some HFM systems, a percentage is displayed.
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Data Parameters Engine Parameters are a lean correction, or reduced injector time. The ECU attempts to compensate for tolerances in the mixture by means of LTFT adjustments. All corrections are made in three ranges: closed throttle position, lower partial load, and upper partial load. The ECU multiplies the actual mass of the air inducted into the engine by the correction factor to determine the injection time. For example, if the actual air mass is 150 kg/h and the Scanner reading is 1.
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Data Parameters Engine Parameters the base point, or no correction. Readings above 1.0 indicate a rich correction, or increased fuel, and readings below 1.0 indicate a lean correction, or reduced fuel. All corrections are made in three ranges: closed throttle position, lower partial load and upper partial load. The ECU multiplies the actual mass of the air inducted into the engine by the correction factor (% positive or negative) to determine the injection time.
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Data Parameters Engine Parameters Scanner as a Functional Test. A lower threshold enables the ECU to detect less severe misfires indicated by reading the RPM decrease and misfire fault counter for each cylinder. The crankshaft sensor gear adaptation mean value reflects the addition of a supplementary correction factor designed to compensate for phase error in the crankshaft sensor. This information is used to compute actual ignition timing.
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Data Parameters Engine Parameters START APPROVAL Range: __________________________________________________________ YES/NO Used on LH systems. This shows whether the ECU will allow starting based on input from the anti-theft system. The display reads YES if the correct input from the anti-theft system is received, and NO if the incorrect input signal was received and startup is being prevented.
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Data Parameters Engine Parameters STARTER CONTROL Range: __________________________________________________________ YES/NO STARTER LOCK-OUT OUTPUT STARTER LOCK-OUT REED CONTACT STARTER LOCK-OUT STATUS Range: __________________________________________________________ ON/OFF Used on HFM and EGS systems. These parameters indicate whether the immobilizer system is locking out the starter system. The display reads YES/ON if the starter system is disabled.
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Data Parameters Engine Parameters ECU closes the purge control valves and monitors vacuum for 30 seconds to ensure there is no decrease due to a minor leak. TEMPOMAT SWITCH TEMPOMAT SWITCH(ACCELERATE) TEMPOMAT SWITCH(DECELERATE) TEMPOMAT SWITCH(STORE) Range: __________________________________________________________ ON/OFF Used on ME10 and ME20 systems. These parameters indicate the state of the cruise control switch. The display reads ON when the indicated switch is energized, and OFF if it is not.
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Data Parameters Engine Parameters TORQUE TORQUE CORR. VALUE DURING SHIFT TORQUE DIFFERENCE SUM TORQUE LOSS Range: __________________________________________________________ variable Used on EGS, ME10, and ME20 systems. This parameter is an ECU-calculated engine torque shown in newton-meters (Nm). Display varies according to engine load. The ME-MOTRONIC engine management uses torque-led control, which means it calculates the internal torque produced during combustion.
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Data Parameters Engine Parameters TWC TEMPERATURE FROM OBD 2 Range: __________________________________________________________ variable Used on HFM systems. This parameter displays the ECU-calculated temperature of the threeway catalyst (TWC) for OBD-II vehicles. UPPER P. LOAD F. TRIM CYL 1-6, RIGHT UPPER P. LOAD F. TRIM CYL 4-6, RIGHT UPPER P. LOAD F. TRIM CYL 7-9, LEFT UPPER P. LOAD F. TRIM CYL 10-12, LEFT Range: ______________________________________________________0.750 to 1.280 Used on ME2.7 systems.
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Data Parameters Engine Parameters VEHICLE SPEED FRONT AXLE VEHICLE SPEED REAR AXLE Range: ___________________________________________________ 0 to vehicle max Used on ME 10, ME 20 and SIM4 systems. These parameters indicate the speed of the front and rear axles based on input signals to the ECU from the wheel speed sensors. The measurement can be changed from kilometers per hour (KPH) to miles per hour (MPH).
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Data Parameters Transmission Parameters Transmission Parameters 5TH GEAR Range: __________________________________________________________ ON/OFF Used on the EAG system. This parameter indicates whether the electronic transmission controller (ETC) has engaged 5th gear (overdrive). ON means that overdrive is engaged.The 4th to 5th gear upshift at full throttle may not occur until reaching the cutoff speed.
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Data Parameters Transmission Parameters within eight cells or memory bocks. Each memory block contains specific input values (comparisons) as well as adaptive learning output commands. A transmission is most susceptible to damage when a shift is in process. Typically, transmission shifts take approximately 0.4 to 1.35 seconds to complete. The time when a component is not fully released or fully applied is called “shift overlap.” Shift overlap varies with operating parameters and transmission condition.
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Data Parameters Transmission Parameters CONVERSION Range: ______________________________________________________ not available Used on the EGS system. No information is available at this time. CONVERTED TORQUE (Nm) Range: __________________________________________________________ variable Used on the EGS system. This parameter indicates the amount of torque transferred through the transmission, and includes the torque multiplication effect of the torque converter.
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Data Parameters Transmission Parameters ENGINE RUN TIME LONG TERM MONITOR ENGINE RUN TIME SHORT TERM MONITOR Range: ______________________________________________________ not available Used on the EGS system. These parameters display engine run time, either on a long or short term monitor, and indicate how long the engine has been running. The timer is reset to zero each time the ignition is turned to the OFF position.
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Data Parameters Transmission Parameters grade. The transmission control module (TCM) relies on this calculated value to make shift adjustments. While the vehicle drives unloaded on level ground with a zero percent grade the value should be between -2.5 and 2.5 percent. HOLD GEAR Range: __________________________________________________________ ON/OFF Used on ME10 and ME20 systems.
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Data Parameters Transmission Parameters LOW RANGE PROGRAM Range: __________________________________________________________ ON/OFF Used on the EGS system. This parameter indicates whether the low range program for the transfer case is engaged or not. ON means that the program is engaged, and is adjusting the transmission shift schedule. This program normally activates when the selector lever is placed in the Neutral position while the engine runs in a stationary position.
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Data Parameters Transmission Parameters A leaf spring that rests against the valve body presses the sensors against the transmission housing. This insures a precise distance between the sensor tip and the front sun gear and planet carrier. To check, place the Start Engine Program Mode switch in position “W,” and move the gear selector lever into position “P.” The difference between the nominal and current values should not be greater than 50 RPM.
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Data Parameters Transmission Parameters identifiers are stored in its acceptance list. This very high frequency transmission requires a “twisted pair” of wires to address electromagnetic interference (EMI) concerns. Two wires also ensure communication if one wire is damaged and provide the ability to recognize a CAN circuit fault. The two lines must not be interchanged as each represents either a high or low level.
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Data Parameters Transmission Parameters SHIFT VALVE 1-2/4-5 SHIFT VALVE 2-3 SHIFT VALVE 3-4 Range: ____________________________________________________ OPEN/CLOSED Used on the EGS system. These parameters display the state of the shift solenoids. OPEN means that the valve is energized, or ON, and is allowing fluid to pass. CLOSED means that the valve is de-energized, or OFF, and is not allowing fluid to pass.
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Data Parameters Transmission Parameters SPEED DEV. DISENGAGE CLUTCH(1MIN) Range: ______________________________________________________ not available Used on the EAG system. No other information is available at this time. STARTER CONTROL STARTER LOCK-OUT OUTPUT STARTER LOCK-OUT REED CONTACT STARTER LOCK-OUT STATUS Range: __________________________________________________________ ON/OFF Used on the EGS system.
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Data Parameters Transmission Parameters TRANSMISSION OVERLOAD PROTECTION TRANSMISSION OVERLOAD PROTECTION INTER TRANSMISSION OVERLOAD PROTECTION FEEDBACK Range: __________________________________________________________ ON/OFF Used on EZ, HFM, ME10 and ME20 and EAG systems. These parameters show whether or not the ECU is operating the automatic transmission in an overload protection mode. The display normally reads OFF, and reads ON if transmission overload protection mode is active.
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Data Parameters Transmission Parameters UNFILTERED SELECTOR LEVER POSITION Range: ___________________________________________________________PN/RD1 Used on EGS, ERE/EVE/ASF, HFM, LH, ME10, ME20, ME27, and ME28 systems. These parameters indicate the gear selector lever position. The display shows selected range position, not the current operational transmission gear. W/S PROGRAM SELECTION SWITCH Range: ______________________________________________________________ W/S Used on the EGS system.
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Appendix A Troubleshooting and Communication Problems Startup Troubleshooting If the display does not light up when you connect the Scanner to vehicle power, check: • • • • • • The Scanner battery, located under the left handgrip. For a blown cigarette lighter fuse on the vehicle if using the cigarette lighter power cable. For bent or broken pins on both ends of the data cable and on the test adapter. For a loose cable connection. For an open ground wire in the vehicle connector wiring harness.
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Troubleshooting and Communication Problems Common Problems Common Problems Some common problems that may prevent communication between the Scanner and ECU are listed below: 1. Vehicle identification—Check the vehicle identification entered from the VIN plate. If in doubt, reenter the identification. 2. Scanner connections—See “Check Scanner Connection and Operation” on page 99 for information on Scanner cables and connections. 3.
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Appendix B Terms, Abbreviations and Acronyms Terms The following terms are used throughout this manual to explain certain operations and displays: blink code A type of vehicle control system that has no serial data. Any trouble codes the control system set are extracted either by flashing the malfunction indicator lamp (MIL) or using special digitized break-out box.
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Terms, Abbreviations and Acronyms Abbreviations and Acronyms AFE automatic lane recognition AG automatic transmission AGW audio gateway AHV trailer hitch AIR secondary air injection AKR anti-knock control AKSE automatic child seat recognition ALDA barometric pressure/charge air pressure compensation AP accelerator pedal APS auto pilot system ARF exhaust gas recirculation ARMIN airbag with integrated emergency call system AS antenna system ASA automatic dimming mirror ASD autom
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Terms, Abbreviations and Acronyms Abbreviations and Acronyms CNS communication and navigation system COMAND cockpit management and data system CST cabriolet/convertible soft top CTEL cellular telephone CTP closed throttle position CTU central triggering unit CV convertible soft top D2B D2 bus DAS drive authorization system DBE overhead control panel control module DCM door controller DH diagnosis manual DI distributor ignition DI1 DI for right bank of 12-cylinder DI2 DI for le
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Terms, Abbreviations and Acronyms Abbreviations and Acronyms EMSC electric mirror and steering column, heated and adjustment ENR electronic level adjustment EPC electronic power control ERE IFI diesel system ESA electric seat adjustment ESC electric steering column adjustment ESCM engine systems control module, also called MAS ESL electric mirror, steering column adjustment, heated mirror ESP electronic stability control, traction control ESV electric seat adjustment ETC electronic tr
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Terms, Abbreviations and Acronyms Abbreviations and Acronyms HDFS remote trunk lid locking HFM hot film engine management system HFM-SFI HFM with sequential fuel injection HHS heated rear window HHT hand-held tester HM heated mirrors HS heated seats HZS trunk lid auxiliary lock IAT intake air temperature IC instrument cluster ICL interior central locking ICS information and communication system IDC in-dash controller IFI in-line fuel injection IFZ infrared remote control of ce
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Terms, Abbreviations and Acronyms LLR Idle speed control LOC low compression LRH steering wheel heater LS power steering gear LS, LSA loudspeaker system Abbreviations and Acronyms LWR headlamp range adjustment MAF mass air flow MAP manifold absolute pressure MAS motor aggregate systems ME Mercedes-Benz electronic control system ME-SFI ME with sequential fuel injection MG manual transmission MKL multicontour backrest MIL malfunction indicator lamp MR engine control MRA residu
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Terms, Abbreviations and Acronyms Abbreviations and Acronyms PTS Parktronic system PW power windows PWM pulse width modulation R reverse gear RA repair instructions RB roll bar RCL remote central locking RD radio RDK tire pressure monitor RDS radio data system RDU tire pressure monitor REST residual engine heat utilization RH retractable hardtop RHR retractable rear head restraints RHS right hand steering/rear heated seats ROW rest of world RPM engine speed, revolutions pe
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Terms, Abbreviations and Acronyms Abbreviations and Acronyms SRU manifold vacuum assist STH stationary heater TAU Tempmatic (air conditioning) TB throttle body TC transfer case TCM transmission control module TD time division, speed signal TDC top dead center TIC transistorized ignition control TN time notification, speed signal from ignition module TPC tire pressure control TPM cruise control TRAP trap oxidizer, diesel emission controls TS towing sensor TSG door control modul
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Index A P actuator tests engine 12 Power Pac common problems 99 C S CAN bus 15, 16, 19 and DAS 15 codes 11 definition 100 Main Menu selection 11 connectors. See vehicle connectors Safety iii–iv safety information iii T test adapters DL-16 6 MB-1 6 MB-2 6 testing 14 transmission data parameters 86 D DAS 15–20 and CAN 42 versions 16 data 11 Main Menu selection 11 parameters. See data parameters data parameters 21 digital vs.