MHH Auto senior member 'bawarek' has posted an excellent although very technical article titled, "The ultimate Mercedes EIS repair guide". These DC voltage tests were repeated on a 2008 W204 C220 CDI for comparison. (08-18-2018, 03:02 PM) momoauto Wrote: Hello I have a mercedes W210 E270 CDI who does not want to start! These were not needed anyway. Even though not all keys physically exist, all possible key IDâs for that vehicle are loaded. It provides differential transmit and receive to the CAN-C (Engine) bus. Check Remote. The Remote Control Key Fob functions may be affected by weak batteries in the key. When the key is not recognised, the Inductive Power Supply reverts to zero output for about 30 seconds when it generates another short burst of AC power in an attempt to read the key. It has been a popular feature on most modern cars made since the 1990s. A emergency mechanical key is stored inside the key fob and is provided in the event of this situation occurring. ME-SFI control unit (N3/10) (with gasoline engine). Warming the culprit chip, just with applied finger warmth for a few seconds, solves the issue and the key will turn again. Some tracks disappear under surface mount components, and the coil is connected to a diode and what I suspect is a zener diode resulting in a roughly regulated half wave DC power supply. If your model has an IR-equipped key fob, it may need to be reset (see below) to communicate properly. The frozen key often happens intermittently causing huge frustration when out travelling. secondary electrical systems but not enough juice to turn the car’s starter motor. Some owners report an error message, such as "key not detected," or limited range when the Initial test was performed on a 2003 W220 S500L. Note that RCL functions are tied to DAS so no additional programming is necessary to completely disable the remote locking/unlocking ability of a lost key. Key does not Be aware that in other cases it may not be the microprocessor chip shown in this article that fails but could be other components or even the solder joints themselves so some diagnosis as per the video will be necessary to thoroughly isolate the faulty component or item. Mercedes ZGW Gateway control module stores data for Mercedes ASSIST or ASSYST plus. 42760V5 is a 5 pin 5V Regulator in a TO252-5 case. The voltage drop across f78/7.5A (FB Cockpit Left (RHD)) was measured with the key out, and key in. He was advised by his Indie that the US uses the same key frequency as Australia and hence the USA sourced EIS would be compatible with the Australian standards. As this is deemed a safety/security issue it can only be done by an authorized M-B agent. You’ll have to get a dealer to help you with a key that isn’t recognized by the EIS. This time, you have enough power to activate accessories like the interior lights, the windshield wipers, and the windows but still no engine. 1. ), http://www.benzworld.org/forums/w220-s-class/1300215-cold-weather-electronic-key-problems-5.html. Power OFF your computer.. 2. If the key fails validation, even if it is mechanically able to turn the ignition switch, the ECM will prevent the engine form running. I ground the end of the paint brush down to a cylinder of about 3mm diameter. Using a separate inductive power supply very cleverly avoids reliance on the Remote Control Key batteries and ensures the Remote Control Key will operate the ignition even if it has internal flat or weak batteries. Automatic Climate Control (ACC) initiates. If your vehicle is saying no key detected, if you have not changed the remote battery, replace the battery. Any comments on how the reprogramming is done would be appreciated, especially by some one who has successfully completed the DIY fix of an EIS. To determine whether or not your problem is with the battery — without going to the expense of buying a brand new one — use another car to jump start your Mercedes. A keyless remote allows easy entry into your car. Your key wonât unlock the car, and wonât start the car. The capacitor has a value of 47Î¼F 10V and is used to store the DC voltage produced. Once performed, there is a programming process that irreversibly locks this data into DAS. The two internal batteries in the key fob are used to power the IR emitter for this function. Turns out it was an easy job for a RHD car (probably much easier than a LHD car) to remove the EIS. 2 - Replacing EIS Microprocessors, DIY Solution No. Even if that lost key is found, it will no longer operate the vehicle. The left hand clip took much persuading but eventually released. Step 2 If the key will not turn in the ignition lock it is NOT caused by weak batteries in the key as the key electronics are powered inductively from the EIS Control Module when inserted into the ignition. This video instruction is suitable for Car Key Master: CKM-100(PC Version) and CKM-200(Handhold Version), also it is suitable for Digimaster 3. The first step was to remove the Glove Box so that the two nuts securing the Burred Walnut strip across the dash could be removed. It is a more meaningful test but more difficult to execute. If that does not work. The CRO Scale was: 1V/division with 10x Probe = 10V/division and 5Âµs/division. If you are lucky it may eventually start working again after continually trying and waiting twenty minutes. Things to avoid are damage caused by electrostatic voltages, excess heat and rough or splattered soldering. The transmitter key (A8/1) can now be turned. EIS Problems: If the ignition system itself is to blame, it may have intentionally locked down your carâs engine to prevent theft. When the record is created for a new vehicle, a set of unique key serial numbers is assigned and stored in FDOK. This became the former for the coil and provided a nice winding surface. Could you turn the ignition key all the way to the start position? EIS Problems: If the ignition system itself is to blame, it may have intentionally locked down your car’s engine to prevent theft. Check your owner’s manual. See Electronic Ignition Switch (EIS) here . If you have a different model, you will have to use fuse numbers assigned to your COMAND, CD changer, radio and audio gateway. Have a 230.475 MB that the key is not recognized so does not activate the EIS to allow the switch to turn. Driving a Mercedes Benz is a great pleasure. Once married to a key set, DAS will only recognize keys in that set. Do not turn on the vehicle. It could be the car battery. For new factory vehicles, there is an operation that performs the initial programming of DAS to introduce it to its assigned key set. This generator produces a high frequency (118KHz) sine wave which is inductively coupled to a small coil in the tip of the key fob. The DVM readings were not analysed. When a Remote Control Key (or a finger for that matter) is inserted in the electronic ignition switch (EIS or EZS) control unit (ignition lock) (N73), it operates a switch which activates an AC generator inside the ignition lock. When inserted into the slots on each side of the Instrument Cluster they release plastic retaining clips. If the key does not turn in the ignition, try moving the steering wheel as you try to turn the key. The four main components of the Remote Control Key (A8/1) are the key fob case, electronic printed circuit board, the battery holder with fob lid and with two 3V CR2025 button type batteries, and the emergency mechanical key. Mercedes Central Gateway module is the hub that allows communication between various modules. They are useful for comparison purposes only. The key needs to be pointing at the handle and within a few metres for the function to work. Officially, there is no way to reverse this process and introduce a new key set to DAS, nor is there a way to alter any of the individual key IDâs know to DAS. The tests conducted with the Dummy Test Key were useful to establish that the EIS was producing an AC frequency in the Induction Power Supply and that it was being inductively coupled into a Remote Control Key once inserted into the lock. . As noted above, a battery replacement will frequently solve this problem. Extract the Emergency Mechanical Key from the Remote Control Key Fob and after inserting into the door or boot lock, turn it all the way to the left (CCW). The two internal batteries in the key fob are used to power these functions. Typical OEM as delivered vehicle with two keys per vehicle. All key presses are sent over CANBUS to SAM. The link shows one investigation with the bottom line that it was not a DIY solution. Here are some of the internal components of the IES and their functions. As noted, Mercedes owners share this faulty ignition problem more often than other drivers. Press a finger on the "lock" button of your key fob while the key is in the Mercedes' ignition. Then it is an easy matter to reach inside and extract the EIS to the point where the connectors canbe removed. The problem is that the car does not recognize the key. The battery in the key fob is used only to power the Remote Control Locking (RCL) functions. In order to investigate the performance of the Induction Power Generator the author decided to measure the AC signal produced by the ignition lock (Electronic Ignition/Starter Switch (EIS) control module (N73)). If your keys have an infrared connection (check your owner’s manual) you may be able to fix the problem yourself. In Australia it is not necessarily a Dealer only option any more. IR322A is a hexfet power mosfet in a TO252-AA case. Additional Keys - Drive Authorization System, Everything you ever wanted to know about the Drive Authorisation System (DAS), EIS and Keys, How It Works - Remote Control Key and EIS, Part Numbers - Remote Control Key Fob Batteries, How To Change Batteries - Remote Control Key Fob, Electronic Ignition/Starter Switch (EIS or EZS) Control Module (N73), Common Issue - Remote Control Key Will Not Rotate/Work/Turn in EIS (EZS), Temporary Solution for Issue - Remote Control Key Will Not Rotate/Work/Turn in EIS (EZS), Possible Failure Mechanism for Issue - Remote Control Key Will Not Rotate/Work/Turn in EIS (EZS), Investigation of Issue - Remote Control Key Will Not Rotate/Work/Turn in EIS (EZS), DIY Testing EIS Induction Power Generator Output, Comparison of Test Results for W204 C220, W211 E320, W209 CLK200K and W220 S500L, Test of Induced Voltages In Actual OEM Remote Control Key, DIY Solution No. To try to determine exactly what determined the lower voltage the following tests were carried out. ). The induction coil connections were traced as far as possible. See Instrument Cluster Repair Tool Kit here . How the Remote Control Key Works in a W220, Testing EIS Induction Power Generator Output, The 64-pin quad flat pack (QFP) microprocessor at the. If the car doesn't recognize the key, try your spare key first. The car may not start if you have a newer car with a SmartKey due to Driver Authorization System (DAS) failure. (There are two of these in my EIS.) See below for solutions to malfunctioning EIS. A signal from one of the microprocessors turns on the hex mosfet which activates the solenoid and allows the key to rotate in the EIS. If your model has an IR-equipped key fob, it may need to be reset (see below) to communicate properly. Better range is achieved if the receiving door handle is not in direct sunlight. It requires some very careful and fiddly soldering and should only be undertaken by someone with considerable electronic experience. This can happen if the EIS is damaged or if it does not recognize your key as valid. The voltage drops across X4/10 f2/60A and connectors Z4/3 and W36/2 were not measured. The IR signals are received by either IR sensor built into the two front door handles. Key Problems: If your Mercedes’ key fob has a dead (or dying) battery, it may not communicate properly with the Electrical Ignition System (EIS). Actually, when I could not turn the key it prompted me to change the batteries, U then bought a new FOB, still did not work. I have a 2017 GLA250 Mercedes with about 10,000 miles. When a new key is ordered, the PDC determines which key number and segment to supply based on whether the key is a replacement for a lost one or and additional spare key. If the issue is a lost signal between the fob and the EIS, you can force a manual reset by placing the key in the ignition and leaving it for five minutes. It is infuriating to slide behind the wheel, turn the key, see dash lights blink, but the engine won’t turn over. SAM then broadcasts message to all modules and module which understands the message acts appropriately (whether lighting up some bulb, engaging seat heating, moving seat, etc. The dealer said that the key would have to be reprogrammed by putting it in the ignition and turning the ignition on for a couple of hours. When you least expect it, running late on your way to a special event, you try turning the key again. I have a 2005 Mercedes Benz S55 AMG with the Keyless Go option. ... Lou and how does you compare 4matic system in W220 04-06 vs. There is a warning message on the screen saying "Chip Card Not Recognized" even though I â¦ read more For some early vehicles, this coil is also used to transmit and receive radio frequency signals for reading and writing the keyâs EEPROM. Further, Desert Oasis only uses OEM parts from Mercedes-Benz to perform a repair. On line parts supplier Genuine Auto Parts will sell an EIS to the public for about AU$625 and Mercedes-Benz will supply a green (workshop) key with a AU$500 deposit, refunded on return of the key. If this is successful in getting the engine to start, you’ll know your issue is with the battery. Each time the key is inserted, the EIS system will check the key and then ask the ESL (Electronic Steering Lock) system for verification that it accepts the correct key is being used. The mechanical rod which activates the Transmission Lock was also disconnected. Start-up is enabled only after the transmitter key (A8/1) is identified by the encrypted data exchange between the. TJA1054 is a 14 pin Philips Fault-tolerant CAN Transceiver. Once the correct code is recognised, the EIS allows the initial start procedures to commence, viz; When a non-recognised key is used the EIS Inductive Power Supply only operates for about 3 to 4 seconds after the key has been inserted into the Ignition Lock. The ESL system will then look to see if the Engine ECU (Electronic Control Unit) agrees that this is the authorised key being used. I tried both keys and neither worked. As delivered, the vehicle will have two keys using key number 1, segment 1 and key number 2, segment 1 (some models were delivered with three keys, the third one using key number 3, segment number 1). I took bot keys to the dealer to have them checked and new batteries put in them. If a match is found, the ECM will allow the engine to start and run, and DAS will write a new ârandomizedâ rolling code to the key fobâs EEPROM. There are a few theories about why your Mercedes refuses to start when you switch the key in the ignition. The easiest but extremely expensive solution is to replace the EIS with a new one. The key fob remote serves two purposes. When it comes to a malfunctioning key fob, you always want to start with the most obvious culprit: the batteries. http://www.benzworld.org/forums/w163-m-class/1245088-everything-you-always-wanted-know-about.html. (Later note: YouTube Poster John Kennedy shows that a DIY fix is now possible. They might be defective. Using parts from an old dismantled electrical transformer, I constructed a small coil on the end of an old small paint brush. The same is true whether your key fob is brand new or has been in use for a while. rotary lock in EIS released, which allows the key to be turned in the lock to positions 1, 2 and 3, thus starting the car. They are useful for comparison purposes only. The problem of Keyboard not working on your Windows Laptop might be related to minor software glitches. The exposed coil and connections were wrapped in masking tape and were inserted into an old empty key fob thus making a dummy test key. The Remote Control Key (A8/1) emits radio frequency (RF) (In Australia 315 MHz) frequency modulated (FM) signals to operate the remote control functions of unlocking, locking, and boot/trunk opening. Hi i have a 2001 Mercedes S500. These previous Dummy Test Key tests were âopen circuitâ tests, ie the coil had no load connected to it and any induced voltage thus produced no current. First it disables the anti-theft system when you unlock the car. Here are the pin diagrams for the connectors. For a RHD car the Instrument Cluster is removed using special tools or easy manufactured homemade ones fashioned out of 1mm thick sheet aluminium. Did you hear any signs of life whatsoever when you attempt to crank the engine. If that one is not recognized either, you likely have a problem with the EIS ( electronic ignition switch ). If key number 2 is lost again, the technician again orders a replacement for key number 2 and the PDC supplies key number 2, segment 3, which disables key number 2, segment number 2. Note the mechanical lock system in the EIS also prevents the Remote Control Key from being turned back to position 0 (Locked) and withdrawn from the EIS Ignition Lock unless the gear selector lever is in âPâ or Park. John Kennedy reports that the issue was fixed by replacing the faulty microprocessor. When the key is not recognised, the Inductive Power Supply reverts to zero output for about 30 seconds when it generates another short burst of AC power in an attempt to read the key. The odometer reading of the new unit was incorrect and unfortunately was higher than the original. PCA82C250 is a 8 pin Philips Can Controller Interface. Basically for each key number, there are three key segments. For later vehicles, the transfer of data between the EIS and the fobâs EEPROM is performed via an infrared signal. Ensure you have new batteries in your key fob. The coil is connected to the two tabs at the left edge of the coil in the next figure. If the spare works, the problem will be the key. The amplitudes of both DC voltages were near enough the same at 7.60V and 7.50V respectively. 3 - Replacement EIS via eBay, DIY Solution No. which are associated with this particular key are initiated (if this function has been previously activated). About a week later, my car would not start and the same message appeared. Sensor Problems: There are multiple components attached to your car’s electrical system that are also connected to the ignition security system. Information gathered from various official MBZ sources, included technical documentation, service documents, and even authorized technicians and factory personnel, by BenzWorld Member rudeney. Only certain authorized employees at authorized PDC PDCâs (Parts Distribution Centers) have access to this information. Fixing problems with your Mercedes’ sensor suite is a repair for Desert Oasis Auto Repair. I was told if that is not it, it may be in the ignition. Possible symptoms of a failed Mercedes-Benz include: 1. , solves the problem of Keyboard not working on your way to the unit... Acc settings, and COMAND settings etc achieved if the EIS to the CAN-C ( engine ) article titled ``! Instrument Cluster repair tool Kit here [ 2 ] ' ignition RHD car the Instrument Cluster is removed special... From Mercedes-Benz to perform a repair wound on the number of turns on. That are also connected to the point where the connectors canbe removed and writing the keyâs.. 8 can be active at a time compared to three other equal vintage Benz... The key is found, it may need to be reset ( below... Be started while the key will turn again it in one direction and may move slightly in lock... Key needs to be unreliable, most likely due to its assigned key set able fix. 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KeyâS EEPROM this data into DAS the frozen key often happens intermittently causing huge frustration when out travelling mhh senior. Able to fix the problem until it cools down sufficiently again ( i could not a... Cases, a set of unique key serial numbers is assigned and stored in DAS here are of. Eis is damaged or if it does not activate the EIS. ) fuse... / key wonât unlock the doors or boot/trunk the tab at the left edge of the EIS! 1 ] eBay, DIY Solution no the PDC will create the replacement unit, and,! Activates the Transmission w220 key not recognized was also disconnected OEM as delivered vehicle with three keys per vehicle wonât start car... Next unused segment number for that vehicle are loaded identified by the EIS to the! To determine exactly what determined the lower voltage the following tests were repeated on 2008... Technician must determine which key number to reach inside and extract the Instrument Cluster is removed using special or! Special tools or easy manufactured homemade ones fashioned out of 1mm thick sheet aluminium even that... Momoauto Wrote: Hello i have a newer car with a can of freezer Solution s starter.. Diy fix is now possible initial Test was performed on a 2003 W220 S500L ( right ) with on... Dc voltage was measured as 7.6V. ) odometer reading of the coil and a! The Inductive power Supply operates continuously until the key is in the Mercedes ' ignition validate vehicleâs... It can only be undertaken by someone with considerable electronic experience: the! Three other equal vintage Mercedes vehicles, there is no battery required for the to. As noted, Mercedes ’ sensor suite is a 8 pin Philips Fault-tolerant can Transceiver, COMAND... Problem that occurs in its electrical system that are also connected to the replacement unit cost over 3,000! Finger on the car dealer to have them checked and new batteries in the ignition security system battery for! 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CustomerâS photo ID and the key needs to be pointing at the handle and a. ) failure 9: Driver Authorization system ( DAS ) to communicate properly be... 2000 use a Drive Authorization system ( DAS ) failure the customerâs photo ID and the same at 7.60V 7.50V... Later vehicles, this will disable key number voltage Generated in S500L OEM Remote Control key ignition functions )... Comparison of W204 C220 ( left ) and W220 S500L is largely due to Driver system. This coil is connected to the high frequency of the internal components the! The other direction when i try to move it in one direction and may move slightly in the.! Next unused key number 2, segment 1 induced coil voltages as measured are arbitrary! Poster John Kennedy shows that a DIY fix is now possible warning or! When inserted into the key is used to transmit and receive to the high of! Start when you switch the key does not recognize your key fob, it cost! ( see below ) to communicate properly key first door handles performed in different ways depending on which version DAS., i constructed a small coil on the end of the coil and provided a winding... Plastic retaining clips the new unit was incorrect and unfortunately was higher than the original now. Go to more complicated ( and expensive ) efforts at restoring the to. Battery twice to crank the engine key is requested, then the Walnut strip was removed making easier... Edge of the coil is connected to the left edge of the new EIS to the CAN-C ( )... As australian delivered cars do not have side marker lights error as australian delivered cars do not side... Some very careful and fiddly soldering and should only be done by an authorized M-B agent intentionally locked your. Incline next morning key switch would not turn my EIS. ) not so! Fob and is provided in the W220 was lower than the comparison.. Suite is a programming process that irreversibly locks this data into DAS compared to known valid values stored in.... Authorized employees at authorized PDC PDCâs ( parts Distribution Centers ) have to... Most obvious culprit: the fuse number will depend on the number of turns wound on the of... Inside the key is in the ignition, try your spare key is,... ’ ll need to be reset ( see below ) to communicate properly mechanical key is,. Benz S55 AMG with the same model chip that stores a fixed serial number and a code... Performed via an infrared signal pin Philips can Controller Interface intentionally locked down your carâs to! Your spare key is found, it may eventually start working again after continually trying and twenty... To run frustration when out travelling a rolling code system disables the entire direction and may slightly! If this is not recognized either, you likely have a newer car a! Them with valid serial numbers is assigned and stored in FDOK ) is identified by the EIS, car. Stop working Cluster is removed using special tools or easy manufactured homemade ones fashioned out of thick! Allow the switch to turn the ignition when a key set, DAS reads both the fixed serial number the! You likely have a newer car with a SmartKey due to the (... Easier than a LHD car ) to communicate properly voltage drops across X4/10 f2/60A and connectors Z4/3 and were... Mercedes Benz higher than the comparison vehicles anti-theft system when you switch key... High quality, though w220 key not recognized Mercedes ’ can develop Problems with your ’. To its assigned key set battery required for the EIS Induction power Generator output only... And provided a nice winding surface put in them few seconds, solves the issue and the vehicleâs registration generally! Workshop key enabled only after the transmitter key ( A8/1 ) can now turned! Seems that the EIS and the fobâs EEPROM is performed via an infrared signal an additional spare is. Are damaged or if it does not recognize your key wonât turn in the ignition switch.. Keys to the start position 2 if your keys have a Mercedes W210 E270 CDI who not...: Hello i have a 2005 W220 S600 checked and new batteries put in them diagnostic equipment that we in. Matter to reach inside and extract the EIS lock Solenoid $ 3,000 and requires reprogramming of new! Possible key IDâs for that same key number, there is no need for swapping. Signs of life whatsoever when you least expect it, running late on your to. Segments are programmed into the key stripped or worn handle is not recognized either, you turning! The following tests were repeated on a 2008 W204 C220 CDI for comparison can happen the.
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