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. 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. Once performed, there is a programming process that irreversibly locks this data into DAS. The Dummy Test Key induced coil voltages as measured by the CRO were very stable and consistent. If your keys have an infrared connection (check your owner’s manual) you may be able to fix the problem yourself. If you can’t even turn your car’s key to the “start” position, you can be certain that the problem is either the electrical system or the key itself. Check Remote. There were 88 differences between the old and the replacement unit. Two wires were soldered across the coil (white (AC) and black (0V)) and also one wire (red (+V)) on to the (red band) end of the capacitor. This type of test is a âfully loadedâ test, ie the internal coil is connected to itâs normal circuits and thus any induced voltage will produce current and activate the circuits. A DIY fix for this is available below. You might have a issue with the keyless go system or your EIS ( electronic ignition switch) For sure try what Auto Centric recommends to check the starter battery but i dont think a starter battery will give you a No Key Detected message. See Instrument Cluster Repair Tool Kit here . Only a factory or an authorized service center can order keys. See Electronic Ignition Switch (EIS) here . The DVM readings were not analysed. When the replacement key is first used in the vehicle, DAS will disable the use of the key using the same key number and the previous segment. If that does not work. I ground the end of the paint brush down to a cylinder of about 3mm diameter. This became the former for the coil and provided a nice winding surface. Examining the customerâs photo ID and the vehicleâs registration receipt generally satisfies this. The Dummy Test Key also provided useful comparison results between similar vintage Mercedes vehicles, albeit not exactly the same model. Did you hear any signs of life whatsoever when you attempt to crank the engine. Using parts from an old dismantled electrical transformer, I constructed a small coil on the end of an old small paint brush. If that one is not recognized either, you likely have a problem with the EIS ( electronic ignition switch ). For existing vehicles, the service center is required to verify that the customer ordering a key is in fact the owner of the vehicle in question. (The crankshaft position sensor is one example.) The DVM readings proved to be unreliable, most likely due to the high frequency of the signals exceeding the DVMâs capability. 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. If these batteries are weak or flat, the key will not unlock the doors or boot/trunk. They are useful for comparison purposes only. (There are two of these in my EIS.) The key needs to be pointing at the handle and within a few metres for the function to work. The W220 Induction Power Generator output is only about 71% when compared to three other equal vintage Mercedes Benz vehicles. First it disables the anti-theft system when you unlock the car. http://www.mbworld.org/forums/audio-...-pictures.html. I did not establish how many times it continues to do this before cancelling. It is now apparent, thanks to several BenzWorld Members and especially YouTube Poster John Kennedy, that one of the microprocessor chips on the EIS becomes sensitive to cold temperatures. This is largely due to its complex electrical systems, and extensive, theft-deterrent features designed to protect your Mercedes Benz. The coil is connected to the two tabs at the left edge of the coil in the next figure. For a RHD car the Instrument Cluster is removed using special tools or easy manufactured homemade ones fashioned out of 1mm thick sheet aluminium. car was parked on incline next morning key switch would not turn. Ensure you have new batteries in your key fob. For example, if key number 2 is lost, the technician orders a replacement for key number 2 and the PDC supplies key number 2, segment 2. 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. Note the actual voltages as measured with the Dummy Test Key are completely arbitrary and are dependent on the number of turns wound on the Dummy Test Key coil. It could be the car battery. Things to avoid are damage caused by electrostatic voltages, excess heat and rough or splattered soldering. Next, look carefully at your â¦ 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 frozen key often happens intermittently causing huge frustration when out travelling. If your model has an IR-equipped key fob, it may need to be reset (see below) to communicate properly. changed batteries in fob and changed the main battery twice. Comparison of W204 C220 (Left) and W220 S500L (Right) with CRO on Same Scale. Mechanic's Assistant: Is the key stripped or worn? Turns out it was an easy job for a RHD car (probably much easier than a LHD car) to remove the EIS. 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. Of course it may be that it is not the actual chip that is sensitive to cold but one or more of the solder joints connecting the chip to the board may have developed hair line cracks which open when cold and close when warmed. ). secondary electrical systems but not enough juice to turn the car’s starter motor. If this is successful in getting the engine to start, you’ll know your issue is with the battery. Power OFF your computer.. 2. Take out the key from the ignition and donât turn on the car for at least 15 minutes. The problem is that there was a short circuit inside the Neiman EZS EIS (see attached photo) I repaired the fault, the neiman turns, the contact ignition is â¦ If you have a different model, you will have to use fuse numbers assigned to your COMAND, CD changer, radio and audio gateway. DVM Reading Dummy Test Key AC Output in W220 S500L, CRO Reading Dummy Test Key AC Output in W220 S500L, CRO Scale: 1V/division with 10x Probe = 10V/division and 5Âµs/division. Even if that lost key is found, it will no longer operate the vehicle. DAS has a maximum of 24 keys per vehicle, however only 8 can be active at a time. Keys are programmed when a key set is ordered for a new vehicle or an additional or replacement key is ordered for an existing vehicle. The part numbers for the microprocessors in the EIS from a 2003 (Update) W220 S500L are: With thanks to BenzWorld Member pinkster, Dean these microprocessors are available for about US$30 posted from this source. 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. The key fob remote serves two purposes. 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)). This page was last edited on 12 June 2016, at 10:40. Wait for 2 minutes and Restart your computer.. You might be pleasantly surprised see the Keyboard of your Laptop magically back to its working condition. There is a warning message on the screen saying "Chip Card Not Recognized" even though I â¦ read more All Mercedes-Benz vehicles manufactured since about the year 2000 use a Drive Authorization System (DAS) to electronically validate the vehicleâs key. Automatic Climate Control (ACC) initiates. The battery in the key fob is used only to power the Remote Control Locking (RCL) functions. Mercedes-Benz Central Gateway Module ZGS (also referred to as CGW) may fail, causing various warning lights or systems to stop working. Some owners report an error message, such as "key not detected," or limited range when the In this event, all you’ll need to do is replace the battery. Key works in the. Key not recognized" on a 2005 W220 S600. A keyless remote allows easy entry into your car. When this new key is used in the vehicle, this will disable key number 2, segment 1. 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. For later vehicles, the transfer of data between the EIS and the fobâs EEPROM is performed via an infrared signal. Warming the culprit chip, just with applied finger warmth for a few seconds, solves the issue and the key will turn again. It seems that the EIS Induction Power Generator output in the W220 was lower than the comparison vehicles. Despite this brand’s high quality, though, Mercedes’ can develop problems with or without regular car maintenance. When you least expect it, running late on your way to a special event, you try turning the key again. I did not establish how many times it continues to do this before cancelling. Fixing problems with your Mercedes’ sensor suite is a repair for Desert Oasis Auto Repair. Check your owner’s manual. This microchip was very sensitive to cold temperature, shown here being cooled with a can of freezer solution. Information gathered from various official MBZ sources, included technical documentation, service documents, and even authorized technicians and factory personnel, by BenzWorld Member rudeney. Motorola SC510108CFUis a 64pin microprocessor. The capacitor has a value of 47Î¼F 10V and is used to store the DC voltage produced. However, if this is the case, your key should still be able to start the car. If the key fails validation, even if it is mechanically able to turn the ignition switch, the ECM will prevent the engine form running. This can happen if the EIS is damaged or if it does not recognize your key as valid. Note the actual voltages as measured are completely arbitrary and are dependent on the number of turns wound on the Dummy Test Key coil. When the record is created for a new vehicle, a set of unique key serial numbers is assigned and stored in FDOK. The components that you’ll be focusing on here are your car’s keys, its electronic ignition system (EIS), the battery, and some of the sensors connected to the electrical system. For all versions of DAS, there is no battery required for the key. ME-SFI control unit (N3/10) (with gasoline engine). The voltage drops across X4/10 f2/60A and connectors Z4/3 and W36/2 were not measured. 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. The problem of Keyboard not working on your Windows Laptop might be related to minor software glitches. The EIS bezel is easily unscrewed using a special tool. Initial test was performed on a 2003 W220 S500L. After a second attempt whereby both "EPROMs were cloned" the new unit is working the same as the original but with no cold start problem. Of course this is not a permanent fix but may get you out of immediate trouble. 3 - Replacement EIS via eBay, DIY Solution No. Even though not all keys physically exist, all possible key IDâs for that vehicle are loaded. The IR signals are received by either IR sensor built into the two front door handles. 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. which are associated with this particular key are initiated (if this function has been previously activated). 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. . Circuit Diagram for âAâ Connector for EIS. I have been getting a message "key not detected" while driving and when I try to start the car. PCA82C250 is a 8 pin Philips Can Controller Interface. The odometer reading of the new unit was incorrect and unfortunately was higher than the original. To try to determine exactly what determined the lower voltage the following tests were carried out. It is presumed that the EIS warms up slightly during this process. The two internal batteries in the key fob are used to power these functions. 1. The ESL system will then look to see if the Engine ECU (Electronic Control Unit) agrees that this is the authorised key being used. ), http://www.benzworld.org/forums/w220-s-class/1300215-cold-weather-electronic-key-problems-5.html. They are useful for comparison purposes only. I added a single piece of scrap transformer metal to the wooden cylinder to act as a core and bound both together with masking tape. Then the Walnut strip was removed making it easier to extract the Instrument Cluster. See http://mhhauto.com/Thread-The-ultimate-Mercedes-EIS-repair-guide. 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. If key number 2 is lost again, the PDC will supply a key with the next unused key number, segment 1, and the technician will be instructed to disable key number 2 completely using a Hand Held Tester via the OBDII port and the vehilceâs CAN. That is there is no need for chip swapping. The next test aimed to measure the voltage induced in an actual Remote Control Key by the EIS once the key is inserted into the lock. If a replacement key is requested, the technician must determine which key number was lost and order its replacement. 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 newer keys have a transponder integrated in them. 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. 4 - "The Ultimate EIS Repair Guide", http://mhhauto.com/Thread-The-ultimate-Mercedes-EIS-repair-guide, https://w220.ee/index.php?title=WIS_80.57_Drive_Authorization_System&oldid=3884. If you are lucky it may eventually start working again after continually trying and waiting twenty minutes. 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. (08-18-2018, 03:02 PM) momoauto Wrote: Hello I have a mercedes W210 E270 CDI who does not want to start! 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. The modified key could still be inserted into the key fob but without the battery holder and batteries. I wound approximately a thousand turns of 1.1mm diameter enamel insulated copper wire onto the former and soldered some insulated flexible wires for the test connections. 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. When inserted into the slots on each side of the Instrument Cluster they release plastic retaining clips. 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. I was told if that is not it, it may be in the ignition. The steering wheel will feel completely solid if you try to move it in one direction and may move slightly in the opposite direction. If your key will not lock and unlock the car from 10m (30ft) or more, your batteries are weak and that will compromise the strength of the infrared (IR) beam. The vehicle cannot be started while the key will not turn. Measurement of DC Voltage Generated in S500L OEM Remote Control Key Electronics. Itâs time constant is many minutes, ie it holds the voltage charge and powers the key electronics long after the EIS has stopped generating the AC frequency. Also be aware that working with electronic components requires some specialized skills such as fine soldering technique and appropriate earthing techniques to aid in prevention of electrostatic discharge. Key not recognized" on a 2005 W220 S600. 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Needs to be reset ( see below ) to remove the EIS to allow the switch turn! Out it was not a permanent fix but may get you out of immediate trouble after continually trying and twenty... Member iSteve reported that he purchased a replacement key is used in the event of this situation.... As delivered vehicle with three keys per vehicle this microchip was very sensitive excess! Car ( probably much easier than a LHD car ) to communicate properly Distribution Centers have! No longer operate the convenience opening and closing feature Z4/3 and W36/2 were not.! To as CGW ) may fail, causing various warning lights or systems to stop working Scale was: with.