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The BMW Range
3 Series
E90, E91, E92, E93
BMW E92 Car Key
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<blockquote data-quote="jarance" data-source="post: 351917" data-attributes="member: 21"><p>Done at the Service Centre.</p><p></p><p>Some info extract from WDS fro EWS Module for E90.</p><p></p><p><span style="color: Blue">System functions</span></p><p><span style="color: Blue">The following system functions are described for the EWS:</span></p><p><span style="color: Blue"></span></p><p><span style="color: Blue">Control of the electrical steering interlock</span></p><p><span style="color: Blue"></span></p><p><span style="color: Blue">Start enable</span></p><p><span style="color: Blue"></span></p><p><span style="color: Blue"></span></p><p><span style="color: Blue">Control of the electrical steering interlock</span></p><p><span style="color: Blue">During the unlocking procedure, an authentication procedure is run between the Car Access System (CAS) and the electrical steering interlock. The electrical steering interlock may only commence unlocking after a positive result in the authentication procedure. For safety reasons, the electrical steering interlock is not supplied with current while the vehicle is being driven. The electrical steering interlock is only supplied with voltage for the unlocking procedure or locking procedure.</span></p><p><span style="color: Blue"></span></p><p><span style="color: Blue"></span></p><p><span style="color: Blue">Start enable</span></p><p><span style="color: Blue">If the identification data is correct, the CAS control unit activates the starter motor via a relay in the control unit. At the same time, the CAS control unit sends the DME control unit a coded release signal for the engine start. The DME control unit only enables the engine start if a correct enable signal is received from the CAS control unit.</span></p><p><span style="color: Blue"></span></p><p><span style="color: Blue">After inserting the ignition key in the ignition lock or the remote control in the insertion slot, the following sequence begins:</span></p><p><span style="color: Blue"></span></p><p><span style="color: Blue">The transponder in the ignition key or in the remote control is supplied with energy via the ring antenna and sends the key data to the EWS or CAS control unit.</span></p><p><span style="color: Blue"></span></p><p><span style="color: Blue">The EWS or CAS control unit checks the correctness of the key data and only then enables activation of the starter by the DME/DDE.</span></p><p><span style="color: Blue"></span></p><p><span style="color: Blue">The DME/DDE uses a random number and the secret code to calculate a request. The DME/DDE sends this request via the CAN data line (PT-CAN and K-CAN) and the K bus (also called CAS bus) to the CAS control unit.</span></p><p><span style="color: Blue"></span></p><p><span style="color: Blue">The CAS control unit uses the request and the secret code to calculate the response. The response is sent by the CAS via the CAN data line (PT-CAN and K-CAN) and the K bus (also called CAS bus) to the DME/DDE.</span></p><p><span style="color: Blue"></span></p><p><span style="color: Blue">The DME/DDE itself also calculates the response that the CAS control unit expects. The DME/DDE then checks the response received from the CAS control unit to ensure it matches the response it has calculated itself. </span></p><p><span style="color: Blue">If the responses match, the engine start is enabled.</span></p><p><span style="color: Blue"></span></p><p><span style="color: Blue">Identical changing codes are stored in the control units; their value changes after every starting operation. The changing code is formed from a random number and the secret code.</span></p><p><span style="color: Blue"></span></p><p> <span style="color: Blue"></span></p><p><span style="color: Blue"></span></p><p><span style="color: Blue">Notes for Service department</span></p><p><span style="color: Blue">General information</span></p><p><span style="color: Blue"></span></p><p><span style="color: Blue">Adjustment of engine management system with electronic immobiliser</span></p><p><span style="color: Blue"></span></p><p><span style="color: Blue">With the introduction of the new EWS (4th generation), the adjustment between the engine control unit and electronic immobiliser is no longer required.</span></p><p><span style="color: Blue"></span></p><p><span style="color: Blue">6-cylinder petrol engines </span></p><p><span style="color: Blue">The elimination of the adjustment takes effect with the engine control units MSV80 and MSD80 as of 06/2006.</span></p><p><span style="color: Blue"></span></p><p><span style="color: Blue">Diesel engines</span></p><p><span style="color: Blue">Elimination of the adjustment takes effect with the engine control units DDE7 as of 03/2007.</span></p><p><span style="color: Blue"></span></p><p><span style="color: Blue">M-GmbH engines</span></p><p><span style="color: Blue">The elimination of the adjustment takes effect with engine control unit MSS60 as of 06/2007.</span></p><p><span style="color: Blue"></span></p><p><span style="color: Blue">From this point onwards, certain control units can only be replaced with control units specifically ordered for each vehicle.</span></p><p><span style="color: Blue"></span></p><p><span style="color: Blue"></span></p><p><span style="color: Blue">Note! Procedure in the event of a defective control unit!</span></p><p><span style="color: Blue"></span></p><p><span style="color: Blue">If the CAS, EWS (only E83) or DME / DDE is defective, a certain procedure must be followed. </span></p><p><span style="color: Blue">The required control unit must be ordered exactly for the vehicle. This requires the vehicle data (vehicle identification number). </span></p><p><span style="color: Blue">An EWS adjustment is not necessary after renewing the control unit. </span></p><p><span style="color: Blue"></span></p><p><span style="color: Blue">> E70 </span></p><p><span style="color: Blue">When replacing the Electronic Gearbox Control, an adjustment is necessary. During adjustment, the CAS control unit transfers an individual code to the EGS control unit. This individual code is required for the authentication procedure to enable the gearbox function.</span></p><p><span style="color: Blue"></span></p><p><span style="color: Blue">Important</span></p><p><span style="color: Blue"></span></p><p><span style="color: Blue">A trial replacement of the control units with secret code is not possible!</span></p><p><span style="color: Blue"></span></p><p><span style="color: Blue"></span></p><p><span style="color: Blue">Spare key</span></p><p><span style="color: Blue">Spare keys can only be obtained through a BMW dealer with BMW Parts Service. There, one of the 6 spare keys is programmed to match the vehicle. This key is not a copy of the lost key, but rather a new key.</span></p><p><span style="color: Blue"></span></p><p><span style="color: Blue">A total of no more than 6 spare keys that match the fitted EWS control unit can be manufactured and delivered.</span></p><p><span style="color: Blue"></span></p><p><span style="color: Blue">If a new key is inserted for the first time in the ignition lock, there is a noticeable start delay of 1 to 2 seconds. Thereafter, the starting operation must be without any delay.</span></p><p><span style="color: Blue"></span></p><p><span style="color: Blue">Lost keys must be blocked via the diagnosis. Refer to ”Special features of the diagnosis program”.</span></p><p><span style="color: Blue"></span></p><p><span style="color: Blue">CAUTION!</span></p><p><span style="color: Blue"></span></p><p><span style="color: Blue">Every request for a key is documented so that enquiries from insurance companies and authorities can be followed up.</span></p><p><span style="color: Blue"></span></p><p><span style="color: Blue">Reprocurement after loss of all remote controls or ignition keys</span></p><p><span style="color: Blue">If all remote controls or ignition keys are lost, a new EWS or CAS control unit is required.</span></p><p><span style="color: Blue"></span></p><p><span style="color: Blue"><strong>Service functions</strong></span></p><p><span style="color: Blue"><strong>Blocking / releasing remote controls or ignition keys</strong></span></p><p><span style="color: Blue"><strong>It is possible to electronically block or release individual remote controls or ignition keys via the diagnosis (service functions).</strong></span></p><p><span style="color: Blue"><strong></strong></span></p><p><span style="color: Blue">Important</span></p><p><span style="color: Blue"></span></p><p><span style="color: Blue">Electronically blocked means that both the starter and the engine control unit are not enabled for a start. It must be borne in mind that an electronically blocked ignition key still fits mechanically, i.e. all flaps and door can still be opened.</span></p><p><span style="color: Blue"></span></p><p><span style="color: Blue">Display of the remote controls or ignition keys used in this vehicle</span></p><p><span style="color: Blue">Here, it is displayed whether each individual ignition key (remote control) managed by the EWS or CAS control unit has already been detected at least once by the EWS or CAS control unit, i.e. it is possible even in the case of older vehicles to recognise how many remote controls or ignition keys have already been used in this vehicle.</span></p><p><span style="color: Blue"></span></p><p><span style="color: Blue"></span></p></blockquote><p></p>
[QUOTE="jarance, post: 351917, member: 21"] Done at the Service Centre. Some info extract from WDS fro EWS Module for E90. [COLOR="Blue"]System functions The following system functions are described for the EWS: Control of the electrical steering interlock Start enable Control of the electrical steering interlock During the unlocking procedure, an authentication procedure is run between the Car Access System (CAS) and the electrical steering interlock. The electrical steering interlock may only commence unlocking after a positive result in the authentication procedure. For safety reasons, the electrical steering interlock is not supplied with current while the vehicle is being driven. The electrical steering interlock is only supplied with voltage for the unlocking procedure or locking procedure. Start enable If the identification data is correct, the CAS control unit activates the starter motor via a relay in the control unit. At the same time, the CAS control unit sends the DME control unit a coded release signal for the engine start. The DME control unit only enables the engine start if a correct enable signal is received from the CAS control unit. After inserting the ignition key in the ignition lock or the remote control in the insertion slot, the following sequence begins: The transponder in the ignition key or in the remote control is supplied with energy via the ring antenna and sends the key data to the EWS or CAS control unit. The EWS or CAS control unit checks the correctness of the key data and only then enables activation of the starter by the DME/DDE. The DME/DDE uses a random number and the secret code to calculate a request. The DME/DDE sends this request via the CAN data line (PT-CAN and K-CAN) and the K bus (also called CAS bus) to the CAS control unit. The CAS control unit uses the request and the secret code to calculate the response. The response is sent by the CAS via the CAN data line (PT-CAN and K-CAN) and the K bus (also called CAS bus) to the DME/DDE. The DME/DDE itself also calculates the response that the CAS control unit expects. The DME/DDE then checks the response received from the CAS control unit to ensure it matches the response it has calculated itself. If the responses match, the engine start is enabled. Identical changing codes are stored in the control units; their value changes after every starting operation. The changing code is formed from a random number and the secret code. Notes for Service department General information Adjustment of engine management system with electronic immobiliser With the introduction of the new EWS (4th generation), the adjustment between the engine control unit and electronic immobiliser is no longer required. 6-cylinder petrol engines The elimination of the adjustment takes effect with the engine control units MSV80 and MSD80 as of 06/2006. Diesel engines Elimination of the adjustment takes effect with the engine control units DDE7 as of 03/2007. M-GmbH engines The elimination of the adjustment takes effect with engine control unit MSS60 as of 06/2007. From this point onwards, certain control units can only be replaced with control units specifically ordered for each vehicle. Note! Procedure in the event of a defective control unit! If the CAS, EWS (only E83) or DME / DDE is defective, a certain procedure must be followed. The required control unit must be ordered exactly for the vehicle. This requires the vehicle data (vehicle identification number). An EWS adjustment is not necessary after renewing the control unit. > E70 When replacing the Electronic Gearbox Control, an adjustment is necessary. During adjustment, the CAS control unit transfers an individual code to the EGS control unit. This individual code is required for the authentication procedure to enable the gearbox function. Important A trial replacement of the control units with secret code is not possible! Spare key Spare keys can only be obtained through a BMW dealer with BMW Parts Service. There, one of the 6 spare keys is programmed to match the vehicle. This key is not a copy of the lost key, but rather a new key. A total of no more than 6 spare keys that match the fitted EWS control unit can be manufactured and delivered. If a new key is inserted for the first time in the ignition lock, there is a noticeable start delay of 1 to 2 seconds. Thereafter, the starting operation must be without any delay. Lost keys must be blocked via the diagnosis. Refer to ”Special features of the diagnosis program”. CAUTION! Every request for a key is documented so that enquiries from insurance companies and authorities can be followed up. Reprocurement after loss of all remote controls or ignition keys If all remote controls or ignition keys are lost, a new EWS or CAS control unit is required. [B]Service functions Blocking / releasing remote controls or ignition keys It is possible to electronically block or release individual remote controls or ignition keys via the diagnosis (service functions). [/B] Important Electronically blocked means that both the starter and the engine control unit are not enabled for a start. It must be borne in mind that an electronically blocked ignition key still fits mechanically, i.e. all flaps and door can still be opened. Display of the remote controls or ignition keys used in this vehicle Here, it is displayed whether each individual ignition key (remote control) managed by the EWS or CAS control unit has already been detected at least once by the EWS or CAS control unit, i.e. it is possible even in the case of older vehicles to recognise how many remote controls or ignition keys have already been used in this vehicle. [/COLOR] [/QUOTE]
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