WIS 80.57 Drive Authorization System - Revision history

Ricebubbles: /* Investigation of Issue - Remote Control Key Will Not Rotate/Work/Turn in EIS (EZS) */ Added test results

2016-06-12T08:40:04Z

Investigation of Issue - Remote Control Key Will Not Rotate/Work/Turn in EIS (EZS): Added test results

Ricebubbles: /* Replacing EIS Module */ Added new section Connector Pin Diagram - EIS Module

2016-06-08T02:07:22Z

Replacing EIS Module: Added new section Connector Pin Diagram - EIS Module

← Older revision		Revision as of 02:07, 8 June 2016
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	See http://mhhauto.com/Thread-The-ultimate-Mercedes-EIS-repair-guide		See http://mhhauto.com/Thread-The-ultimate-Mercedes-EIS-repair-guide

			===Internal Components - EIS Module===
			Here are some of the internal components of the IES and their functions.
			* Motorola SC510108CFUis a 64pin microprocessor. (There are two of these in my EIS.) (I could not find a pin configuration diagram identifying pin functions.)
			* PCA82C250 is a 8 pin Philips Can Controller Interface. It provides differential transmit and receive to the CAN-C (Engine) bus.
			* TJA1054 is a 14 pin Philips Fault-tolerant CAN Transceiver. . It provides differential transmit and receive to the CAN-B (Interior) bus.
			* 42760V5 is a 5 pin 5V Regulator in a TO252-5 case.
			* IR322A is a hexfet power mosfet in a TO252-AA case.

			===Connector Pin Diagram - EIS Module===
			Here are the pin diagrams for the connectors.
			[[File:Rear View Showing Fixed Connectors for EIS.jpg\|400px\|center]]

			Matching rear view showing fixed connectors.
			[[File:Rear View of Fixed Connectors for EIS.jpg\|300px\|center]]

			Circuit Diagram for ‘A’ Connector for EIS.
			[[File:Circuit Diagram for ‘A’ Connector for EIS.jpg\|400px\|center]]

			Also shown for interest is the circuit diagram for the EIS Lock Solenoid. 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.

			[[File:Circuit Diagram for EIS Lock Solenoid.jpg\|300px\|center]]

Ricebubbles: /* Replacing EIS Module */ Added section on removing EIS

2016-06-08T01:56:29Z

Replacing EIS Module: Added section on removing EIS

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 ===Replacing EIS Module===
 ====M-B Solution - Replacing EIS Module====
 The easiest but extremely expensive solution is to replace the EIS with a new one. It will cost over $3,000 and requires reprogramming of the new EIS to match the vehicle. As this is deemed a safety/security issue it can only be done by an authorized M-B agent.

Ricebubbles at 01:27, 8 June 2016

2016-06-08T01:27:35Z

← Older revision		Revision as of 01:27, 8 June 2016
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	==Remote Control Key==		==Remote Control Key==
	==Description - Remote Control Key==		===Description - Remote Control 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. The~~ two ~~internal~~ batteries ~~in the key fob are used to power these functions. If these batteries are weak or flat~~, the ~~key will not unlock the doors or boot/trunk. A~~ emergency mechanical key ~~is stored inside the key fob and is provided in the event of this situation occurring~~.		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.

	[[File:Button Side of a W220 Remote Control Key.jpg\|300px\|center]]		[[File:Button Side of a W220 Remote Control Key.jpg\|300px\|center]]
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	[[File:Reverse Side of a W220 Remote Control Key.jpg\|300px\|center]]		[[File:Reverse Side of a W220 Remote Control Key.jpg\|300px\|center]]

			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. The two internal batteries in the key fob are used to power these functions. If these batteries are weak or flat, the key will not unlock the doors or boot/trunk. A emergency mechanical key is stored inside the key fob and is provided in the event of this situation occurring.

	The Remote Control Key also emits infra red (IR) signals to operate the convenience opening and closing feature. The IR signals are received by either IR sensor built into the two front door handles. The key needs to be pointing at the handle and within a few metres for the function to work. Better range is achieved if the receiving door handle is not in direct sunlight. The two internal batteries in the key fob are used to power the IR emitter for this function		The Remote Control Key also emits infra red (IR) signals to operate the convenience opening and closing feature. The IR signals are received by either IR sensor built into the two front door handles. The key needs to be pointing at the handle and within a few metres for the function to work. Better range is achieved if the receiving door handle is not in direct sunlight. The two internal batteries in the key fob are used to power the IR emitter for this function

	==How It Works - Remote Control Key and EIS==		===How It Works - Remote Control Key and EIS===
	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. This generator produces a high frequency (118KHz) sine wave which is inductively coupled to a small coil in the tip of the key fob.		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. This generator produces a high frequency (118KHz) sine wave which is inductively coupled to a small coil in the tip of the key fob.

Ricebubbles: /* Remote Control Key Fob */ Added new section Description - Remote Control Key

2016-06-08T01:21:19Z

Remote Control Key Fob: Added new section Description - Remote Control Key

@@ Line 49: / Line 49: @@
 http://www.benzworld.org/forums/w163-m-class/1245088-everything-you-always-wanted-know-about.html
-==Remote Control Key Fob==
+==Remote Control Key==
 ===Tip for Using Mechanical Key===

Ricebubbles: Added new section about DAS Function

2016-06-08T00:59:26Z

Added new section about DAS Function

← Older revision		Revision as of 00:59, 8 June 2016
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	==Description - Drive Authorization System==		==Description - Drive Authorization System==
			===Function - Drive Authorization System===
			All Mercedes-Benz vehicles manufactured since about the year 2000 use a Drive Authorization System (DAS) to electronically validate the vehicle’s key. Each key fob for this system contains an EEPROM chip that stores a fixed serial number and a rolling code. Each time the key is used in the ignition switch, DAS reads both the fixed serial number and the rolling code. These values are compared to known valid values stored in DAS. If a match is found, the ECM will allow the engine to start and run, and DAS will write a new “randomized” rolling code to the key fob’s EEPROM. If the key fails validation, even if it is mechanically able to turn the ignition switch, the ECM will prevent the engine form running.

			Every Mercedes-Benz vehicle has a record in FDOK (M-B’s worldwide database that contains all information about every M-B ever built), including the assignment of all electronic key codes for all vehicles using DAS.

			When the record is created for a new vehicle, a set of unique key serial numbers is assigned and stored in FDOK. Only certain authorized employees at authorized PDC PDC’s (Parts Distribution Centers) have access to this information. Authorized PDC’s stock virgin key transponders and have special equipment to program them with valid serial numbers from FDOK. 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. Only a factory or an authorized service center can order keys. 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. Examining the customer’s photo ID and the vehicle’s registration receipt generally satisfies this.

			For new factory vehicles, there is an operation that performs the initial programming of DAS to introduce it to its assigned key set. This loads all the pre-defined key serial numbers into DAS as defined in FDOK. Even though not all keys physically exist, all possible key ID’s for that vehicle are loaded. This is performed in different ways depending on which version of DAS the vehicle uses. Once performed, there is a programming process that irreversibly locks this data into DAS. Once married to a key set, DAS will only recognize keys in that set. 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 ID’s know to DAS.

			For all versions of DAS, there is no battery required for the key. The battery in the key fob is used only to power the Remote Control Locking (RCL) functions. The power for the DAS functions comes from an electronic coil mounted in the ignition switch housing that supplies inductive current to the circuitry in the key fob. For some early vehicles, this coil is also used to transmit and receive radio frequency signals for reading and writing the key’s EEPROM. For later vehicles, the transfer of data between the EIS and the fob’s EEPROM is performed via an infrared signal. Also, since there is no mechanical blade to unlock the ignition switch, the release of both the ignition switch and the steering column lock is performed electronically once DAS validate the key through the infrared data exchange.

			===OEM Keys - Drive Authorization System===
			DAS has a maximum of 24 keys per vehicle, however only 8 can be active at a time. Basically for each key number, there are three key segments. The valid key numbers and segments are programmed into the virgin ESL, EIS and ECM using a special green-colored workshop key. 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).

			Typical OEM as delivered vehicle with two keys per vehicle.

			*Key Number 1
			** Segment 1
			** Segment 2

			*Key Number 2
			** Segment 1
			** Segment 2


			Typical OEM as delivered vehicle with three keys per vehicle.

			*Key Number 1
			** Segment 1
			** Segment 2

			*Key Number 2
			** Segment 1
			** Segment 2

			*Key Number 3
			** Segment 1

			===Additional Keys - Drive Authorization System===
			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 an additional spare key is requested, then the PDC will create it as the next unused key number, segment 1. If a replacement key is requested, the technician must determine which key number was lost and order its replacement. The PDC will create the replacement with the next unused segment number for that same key number. 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. 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. When this new key is used in the vehicle, this will disable key number 2, segment 1. Even if that lost key is found, it will no longer operate the vehicle. 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 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 vehilce’s CAN. 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.

	===Everything you ever wanted to know about the Drive Authorisation System (DAS), EIS and Keys===		===Everything you ever wanted to know about the Drive Authorisation System (DAS), EIS and Keys===

Ricebubbles: Added link to supplier of EIS and rearranged for better clarity.

2016-06-08T00:21:34Z

Added link to supplier of EIS and rearranged for better clarity.

Show changes

Ricebubbles: /* DIY Solution No. 3 */

2016-06-07T23:31:01Z

DIY Solution No. 3

← Older revision		Revision as of 23:31, 7 June 2016
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	Reference [http://www.benzworld.org/forums/w220-s-class/1300215-cold-weather-electronic-key-problems-8.html]		Reference [http://www.benzworld.org/forums/w220-s-class/1300215-cold-weather-electronic-key-problems-8.html]

	===DIY Solution No. 3===		===DIY Solution No. 3 - "The Ultimate EIS Repair Guide"===
	MHH Auto senior member 'bawarek' has posted an excellent although very technical article titled, "The ultimate Mercedes EIS repair guide".		MHH Auto senior member 'bawarek' has posted an excellent although very technical article titled, "The ultimate Mercedes EIS repair guide".

Ricebubbles: /* DIY Solution No. 2 */

2016-06-07T23:30:21Z

DIY Solution No. 2

← Older revision		Revision as of 23:30, 7 June 2016
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	[http://www.aliexpress.com/item/SC510108CFU-4J74Y-automotive-chips-quality-assurance/1956927024.html?aff_platform=aaf&sk=bm2aeAra%3A&cpt=1436314289549&af=3193630&cn=002&cv=11032041&dp=ibu0fvj867000b1w008sc&dl_target_url=http%3A%2F%2Fwww.aliexpress.com%2Fitem%2FSC510108CFU-4J74Y-automotive-chips-quality-assurance%2F1956927024.html&PID=3193630&URL=http%3A%2F%2Fwww.aliexpress.com%2Fitem%2FSC510108CFU-4J74Y-automotive-chips-quality-assurance%2F1956927024.html&aff_trace_key=42846488950678656]		[http://www.aliexpress.com/item/SC510108CFU-4J74Y-automotive-chips-quality-assurance/1956927024.html?aff_platform=aaf&sk=bm2aeAra%3A&cpt=1436314289549&af=3193630&cn=002&cv=11032041&dp=ibu0fvj867000b1w008sc&dl_target_url=http%3A%2F%2Fwww.aliexpress.com%2Fitem%2FSC510108CFU-4J74Y-automotive-chips-quality-assurance%2F1956927024.html&PID=3193630&URL=http%3A%2F%2Fwww.aliexpress.com%2Fitem%2FSC510108CFU-4J74Y-automotive-chips-quality-assurance%2F1956927024.html&aff_trace_key=42846488950678656]

	===DIY Solution No. 2===		===DIY Solution No. 2 - Replacement EIS via eBay===
	Australian BenzWorld Member iSteve reported that he purchased a replacement EIS with the same part number as his on eBay from the USA.		Australian BenzWorld Member iSteve reported that he purchased a replacement EIS with the same part number as his on eBay from the USA.

Ricebubbles: /* =Parts Availability - EIS Microprocessors */

2016-06-07T23:24:22Z

=Parts Availability - EIS Microprocessors

← Older revision		Revision as of 23:24, 7 June 2016
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	[[File:W220 EIS Microprocessor 02.JPG\|400px\|center]]		[[File:W220 EIS Microprocessor 02.JPG\|400px\|center]]

	====Parts Availability - EIS Microprocessors===		====Parts Availability - EIS Microprocessors====
	With thanks to BenzWorld Member pinkster, Dean these microprocessors are available for about US$30 posted from this source.		With thanks to BenzWorld Member pinkster, Dean these microprocessors are available for about US$30 posted from this source.
	[http://www.aliexpress.com/item/SC510108CFU-4J74Y-automotive-chips-quality-assurance/1956927024.html?aff_platform=aaf&sk=bm2aeAra%3A&cpt=1436314289549&af=3193630&cn=002&cv=11032041&dp=ibu0fvj867000b1w008sc&dl_target_url=http%3A%2F%2Fwww.aliexpress.com%2Fitem%2FSC510108CFU-4J74Y-automotive-chips-quality-assurance%2F1956927024.html&PID=3193630&URL=http%3A%2F%2Fwww.aliexpress.com%2Fitem%2FSC510108CFU-4J74Y-automotive-chips-quality-assurance%2F1956927024.html&aff_trace_key=42846488950678656]		[http://www.aliexpress.com/item/SC510108CFU-4J74Y-automotive-chips-quality-assurance/1956927024.html?aff_platform=aaf&sk=bm2aeAra%3A&cpt=1436314289549&af=3193630&cn=002&cv=11032041&dp=ibu0fvj867000b1w008sc&dl_target_url=http%3A%2F%2Fwww.aliexpress.com%2Fitem%2FSC510108CFU-4J74Y-automotive-chips-quality-assurance%2F1956927024.html&PID=3193630&URL=http%3A%2F%2Fwww.aliexpress.com%2Fitem%2FSC510108CFU-4J74Y-automotive-chips-quality-assurance%2F1956927024.html&aff_trace_key=42846488950678656]