Table of Contents E65/66 Comfort Access Subject Page Introduction to Comfort Access.4 System Overview .5 Passive Entry.5 Unlocking .5 Passive Go.5 Starting .5 Passive Exit.6 Locking .6 Special Comfort Access Functions .6 ID Transmitter Remains in Vehicle .6 ID Transmitter Remains in Trunk .6 Engine Start Disable.6 Starting Engine without ID Transmitter.7 Check Control M essage,Terminal 15 .7 Unintentional Wake-up Function .7 Locking with Engine Running.7 System Components.8 Comfort Access Module (CA).10 Car Access Module (CAS).12 Electronic Outer Door Handle (TAGE).12 Electronic Unlock M otor.13 ID Transmitter.14 Remote Control Receiver (FBD).14 Antennas.14 Footwell Antenna Location.15 Rear Parcel Shelf Antenna Location .16 Trunk Antenna Location .17 Bumper Antenna Location .17 ID Transmitter/Remote Control.18 Service Information.19 CarWash.19 CBS Data .19 Door-Selective Unlocking .19 Missing ID Transmitter .19 Initial Print Date: 03/05 Revision Date: 04/05 Subject Page Component Replacement.20 Diagnosis.20 Comfort Access Fault Memory .20 Fault Memory, Electronic Outer Door-Handle.20 Initialization.20 Check Control M essages.21 E 65/66 Comfort Access Model: 750i, 750Li, 760i and 760Li Production: From March 2005 IBIICTI1BS After completion of this module you will be able to: • Familiarize yourself with the components used in the system. • Familiarize yourself with the operation of the capacitors in the door handles. 3 E65/66 Comfort Access Introduction to Comfort Access Comfort Access (SA 322) is offered as an option forthe 750i/iL & 760i/iL. "Comfort access" is a passive access system. This means the vehicle can be unlocked by grasping the outer door handle, provided the identification transmitter is located within a radius of no more than approx. .5 - 1.5 m from the vehicle. With Comfort Access it is sufficient forthe driverto simply carry the identification trans¬ mitter on his/her person in orderto unlock, lock or start the vehicle. With this system the operation/functions are distributed among several control modules. Comfort Access system utilizes the same modules that are utilized forthe Central Locking function plus a Comfort Access module specifically for monitoring the systems antennas, activation of the remote receiver and monitor status of the Electronic Outer DoorHandle. 4 E65/66 Comfort Access System Overview With regard to the Comfort Access System the remote control is referred to as an Identification Transmitter since the remote is transmitting ID data to the vehicle without any action being performed by the user (buttons on the remote do not need to be pressed). Passive Entry Passive Entry enables access to the vehicle without operating the ID Transmitter/remote control. Unlocking As the customer approaches the vehicle with the ID Transmitter located on his/her per¬ son and places their hand between the door handle and the door panel or depresses the button on the trunk lid, the system "wakes up" and a signal is transmitted via K-TAGE Bus to CAS. CAS in turn requests a verification that a valid ID transmitter is located with¬ in the radius of the transmitting antenna, via K-TAGE Bus to the door modules or antenna located on the rear bumper. The request is made by transmitting a signal from the respective doorhandle module or antennas located in the rear bumperto the ID Transmitter, which returns an ID signal that is received by the antenna located on the rear window. The signal received by the antenna on the rearwindow is transmitted to the CAS and the ID information is verified. If the ID is valid the door can be unlocked by pulling up on the door handle ortrunk will be unlocked by depressing the button. Passive Go The passive go function makes it possible to start the vehicle without the ID transmitter being inserted in its holder. Note: The vehicle cannot be started without a valid ID transmitter being locat¬ ed in the interior of the vehicle. Starting Upon entering the vehicle the engine can be started by pressing the start button with the brake pedal depressed, as long as the valid ID transmitter is located in the interior of the vehicle. The presence of a valid ID transmitter is determined by the interior antennas and validat¬ ed by the CAS which will release the start enable signal. 5 E65/66 Comfort Access Passive Exit The passive exit function makes it possible to lock the vehicle without actively using the ID transmitter/remote control. Note:The vehicle cannot be unlocked withouta valid identification transmitter within a radius of .5 - 1.5 m from the respective antenna. Locking On exiting the vehicle the doors can be locked by pressing on the doorhandle, as long as all doors are closed and a valid ID transmitter is determined to be located outside of the vehicle. In the event that the system detects a valid ID transmitter inside the vehicle and/orthe system does not detect the presence of a valid ID transmitter on the outside of the vehicle, the doors will unlock and display a message on the check control display. Special Comfort Access Functions The Comfort Access System offers additional special functions that are determined by the actions of the user such as: ID Transmitter Remains in Vehicle If another ID transmitter is detected on the inside of the vehicle and a valid ID transmitter is detected/determined to be located on the outside, then the transmitter located on the inside is ignored/deactivated and the vehicle is secured. Once the vehicle is unlocked again the key that was deactivated is reactivated. ID Transmitter Remains in Trunk When the trunk lid is closed/locked a status signal is received by the power module which transmits the information to the Comfort Access module . The Comfort Access module starts a search for an ID transmitter in the trunk, if a valid transmitter is located by the antenna in the trunk a signal is sent to the CAS, which in turn transmits a request to the power module to open the trunk. In order to lock the trunk with a spare key located inside: • It must be determined that a valid ID transmitter is located on the outside of the vehi¬ cle within the radius of the antenna. • Valet switch must be active Engine Start Disable The engine cannot be started if the identification transmitter is located in the luggage compartment of the unlocked vehicle. 6 E65/66 Comfort Access Starting Engine without ID Transmitter The function makes it possible to start the vehicle within 10 s after"engine OFF" without detecting the identification transmitter. This function is intended for cases where the identification transmitter is not detected due to high frequency interference, as an exam¬ ple. Check Control Message, Terminal 15 The Comfort Access System enables terminal selection without the ID transmitter being inserted in its holder. It is possible that terminal 15 is selected by pressing the START- STOP button. A corresponding check control message is shown in the instrument clus¬ ter afterthe door is opened. An audible signal also sounds. Note: The battery may be discharged if the driver ignores the warnings and locks the vehicle. Unintentional Wake-up Function In orderto avoid waking the electronic outer door handle module by touching the outer doorhandle without a valid identification transmitter. The outer door handle module is requested by CAS to send a signal to the ID Transmitter requesting the transmission of a valid/authentication signal. If no valid ID transmitter is detected, the electronic outer door handle module receives this information from the CAS and in this case, the electronic outer door handle module remains inactive until a valid identification transmitter is detected. Locking with Engine Running The vehicle can also be unlocked with the engine running if the engine was started with passive go. When leaving the vehicle, the ID transmitter must also be taken and the vehi¬ cle locked from the outside. 7 E65/66 Comfort Access System Components Button, tailgate to power module K-CAN Periphery Aerials FBD receiver K-TAGE sub-bus 8 E65/66 Comfort Access Legend for System Components Index Explanation Index Explanation B Car Access Control Module (CAS) 12 Trunk Release/Open Button 2 Antenna, Interior, Right Front Footwell 13 Trunk Antenna 3 DoorModule, PassengerDoor 14 Antenna, Rear Parcel Shelf B Electronic OuterDoor-Flandle, Passenger Door 15 Electronic Outer Door-Flandle, Rear Door Driver's Side 5 Antenna, Interior, Right Rear Footwell 16 Door M odule, Rear Driver's Door 6 DoorModule, Rear Passenger Door 17 Identification Transmitter 7 Electronic Outer Door-Flandle, Rear Door PassengerSide 18 Electronic Outer Door-Flandle, Driver's Door 8 Remote Control Receiver (FBD) 19 Antenna, Interior, Left Rear Footwell 9 Comfort Access Control Module 20 DoorModule, Driver's Door 10 Power Module 21 Antenna, Interior, Right Front Footwell 11 Antennas, Rear Bumper 9 E65/66 Comfort Access Comfort Access Module (CA) The Comfort Access Module located in the right side of the trunk nearthe Power Module provides the following functions: • CAN Bus Interface (K-CAN Periphery & K-TAGE) • Electronic Outer Door Handle (TAGE) interface • Activation ofthe 8 inductive antennas - Initiates scan for ID Transmitter on interior of vehicle using the interior antennas (5) - Initiates scan for ID Transmitter in trunk of vehicle using the trunk antenna (1) - Initiates scan for ID Transmitter on exterior rear of vehicle using the bumper anten¬ nas (2) • Simultaneous activation of Remote Control Receiver (FBD) during scan for ID Transmitters • Stores fault memory for Electronic Outer Door Handle (TAGE) and inductive anten¬ nas • Diagnostic Gateway for Electronic Outer Door Handles (TAGE) Index Explanation 1 Comfort Access Module (CA) 10 E65/66 Comfort Access With the introduction of the Comfort Access system the K-CAN Periphery has been extended as shown below: K-CAN S K-TAGE TAGE J TMFAT 1 TAGE r L ■Jtmfah TMBFH SMFAH SMBFH HKL PM CA K-CAN P Index Explanation Index Explanation CA Comfort Access Control Module TAGE Electronic Outer Door Handle CAS Car Access System TMBFT DoorModule, Passenger Door HKL Trunk Lid Lift TMBFTH DoorModule, PassengerSide RearDoor PM Power Module TMFAT DoorModule, Driver's Door SMBF Seat Module, PassengerSeat Adjustment TMFATH DoorModule, DriverSide RearDoor SMBFH Seat Module, Passenger Side Rear Seat Adjustment K-CAN P K-CAN PERIPHERY SMFA Seat M odule, Seat Adjustment K-CAN S K-CAN SYSTEM SMFAH Seat Module, Driver Side Rear Seat Adjustment K-TAGE Sub-Bus, Electronic Outer Door Handle Note: The K-TAGE Sub-Bus is only looped through the door modules, no exchange of information occurs. 11 E65/66 Comfort Access Car Access Module (CAS) The CAS is responsible for: • Validation/authentication of ID Transmitter data • Storing faults regarding ID Transmitter • Activation of the validation process from trunk switch or starter switch Electronic Outer Door Handle (TAGE) The Electronic Outer Door Handles are responsible for: • Detection of a pull on the outer door handle via an integrated hall sensor • Detection of a push on the outer door handle via an integrated hall sensor • Monitoring the capacitive sensor integrated in the door handle to detect the pres¬ ence of a hand between the door handle and the door panel • Activation of the transmit antenna located in the handle to provide an activation sig¬ nal to the ID Transmitter • Transmission of sensor data by way of the K-TAGE Bus from the doorhandle to the door module (pass through function only) On vehicles equipped with Comfort Access the top half of the doorhandle has a chrome insert. 1 2 3 Index Explanation 1 Chrome Insert 2 Door Handle 3 Rest/Zero position (Handle can be pushed in or pulled out approx. 3 mm) 12 E65/66 Comfort Access Each Door Handle M odule can be woken-up by pulling or pushing on the handle, when this occurs the status of the handle is transmitted to the door module and then onto the CAS and CA module via the K-CAN Periphery. The door handle also transmits a signal to the ID transmitter requesting it to transmit a validation signal, which is acquired by the remote Receiver antenna in the rear window and forwarded to the CAS for authentication. If the signal is recognized an enable signal is sentfrom the CAS to the respective door handle and the door can be unlocked. Each door handle module is connected by a 4-wire connection to a respective door module. Electronic Unlock Motor Each lock in the vehicles doors incorporates an electric unlock motor. The motor assists in unlocking the locking pawl of the door in a timely manner after authentication of the ID transmitter and the handle being pulled. Index Explanation 1 Door Lock 2 Electric Unlock Motor 3 M otorfor Automatic Soft Close 13 E65/66 Comfort Access ID Transmitter The Remote Control/ID Transmitter is responsible for: • Transmission of encrypted high frequency messages • Reading/receiving of transmitted signals from inductive antennas • Standard remote control functions via push button Remote Control Receiver (FBD) Incorporated into the rear window is an antenna that is used to receive the transmitted signal from the remote Control/ID transmitter. The signal is automatically transmitted from the ID transmitter upon relieving a request for validation from one ofthe exterior antennas. 4 Index Explanation 3 Antenna Amplifier F 8-Pin Connectoron Antenna Amp for wake-up signal for FBD Receiver FBD Antenna for Remote Control KL. 30 Voltage Supply B + KL.31 Ground Antennas On the 7 series a total of 12 antennas are used to monitor/communicate with the ID transmitter. • 1 in each Door Handle (4) • 2 on the rear Bumper Cover • 1 in each Footwell (4) • 1 on rear Parcel Shelf • 1 in the Trunk 14 E65/66 Comfort Access The antennas on the interior of the vehicle are inductive air core coil antennas that must be more than 15 mm from the surface that they are mounted to. Index Explanation 1 Antenna in each Footwell 2 Antenna in Rear Parcel Shelf 3 Antenna in Trunk 4 Antenna Attached to Rear BumperCover Footwell Antenna Location The antennas are embedded in the insulating material located beneath the carpet. Index Explanation 1 Right Front Footwell 2 Left Front Footwell 15 E65/66 Comfort Access Index Explanation 1 Right Rear Footwell 2 Left Rear Footwell Rear Parcel Shelf Antenna Location The antenna is installed at angle in a holder and secured to the front edge of the rear par¬ cel shelf Index Explanation 1 Rear Parcel Shelf 2 Antenna 16 E65/66 Comfort Access TrunkAntenna Location The antenna in the trunk is clipped into a housing and secured underneath the rear par¬ cel shelf. Index Explanation 1 Antenna below Rear Parcel Shelf BumperAntenna Location Two antennas are installed on the inside of the rear bumper cover. 1 2 Index Explanation 1 Right Rear Bumper Antenna 2 Left Rear Bumper Antenna 17 E65/66 Comfort Access ID T ransmitter/Remote C ontrol The ID transmitter contains the following functions: • Incorporates the normal remote control buttons • Able to receive signal from transmitting vehicle antennas • Signal encryption • Transmission of encrypted high frequency information • Mechanical Keys Since the key does not need to be inserted into the holderto start the vehicle the battery of the remote control/ID Transmitter is no longer chargeable, therefore requiring the bat¬ tery to be replaced. Under "average" usage the the battery may need to be replaced once a year. Index Explanation 1 Integrated Mechanical Key 2 Battery 3 Battery Cover 18 E65/66 Comfort Access Service Information CarWash If the vehicle is to be taken through a CarWash the ID transmitter must be inserted into the 'Key" holder slot of the ignition switch while the engine is running in orderto keep the parking gearfrom engaging automatically. By inserting the ID transmitter with the engine running and gear engaged the Comfort Access functions are deactivated. If the engine is the switched off via the start/stop but¬ ton the "N" position is automatically engaged. CBS Data Atthis time the transmission of Condition Based Service (CBS) data to the identification transmitter via the radio interface forthe E65 is not possible. In orderto update the CBS data residing in the ID Transmitter, if the Passive Go function is being used (ID Transmitter is not being inserted into the "Key" holder slot on the igni¬ tion switch): • Insert the ID Transmitter into the slot of the ignition switch • Hold the central-lock rocker switch forapprox.10 seconds in the "Unlock" position • An audible gong will indicate that the key data has been updated Door-Selective Unlocking Door unlocking is performed selectively if "selective unlocking" is coded in the key- memory function (otherwise "global unlocking"). To unlock the remaining doors with door-selective unlocking, press the center-lock rock- erswitch into the "Unlock" position. Missing ID Transmitter If the engine is started and the ID transmitter is removed from the passenger compart¬ ment of the vehicle as a result of a person leaving the vehicle while in possession of the ID Transmitter (driver change, someone is being dropped-off etc.): • The engine is not automatically switched-off, as this is not permitted by law • A Check Control message appears if a dooris opened and then closed again • Once the engine has been switched off, it can be restarted within 10 seconds even if there is no identification transmitter inside the car (i.e. without valid drive autho¬ rization). This is important in the event the engine stumbles/stops on a railroad crossing and there is no identification transmitter inside the car. For safety reasons the owner should carry the wallet key. The wallet key in conjunction with the adapter permits drive authorization; this enables the carto be driven even when the identification transmitter is missing. 19 E65/66 Comfort Access Component Replacement Despite being of the same design, the front and rear outside doorhandles on the pas¬ senger side are not interchangeable. Each Electronic Outer Door Handle must be installed in the correct installation location (note part numbers) so that the motorfor unlocking the locking pawl (electric opening motor) operates properly. In addition, each Electronic Outer Door-Handle has a logical bus address. Diagnosis Comfort Access Fault Memory The following possible faults are stored in the fault memory of the Comfort Access Module: • Overvoltage or undervoltage, terminal 30 (functional limits, Comfort Access) • Short circuit to positive or open circuit or contact break in relays for all 5 interior antennas, trunk antenna and both bumper mounted antennas • Faulty relay coil at all relays, sticking relay contact at all relays with antenna outputs • Faulty output stage • Excess temperature at output stage • Faulty K-bus interface • Sticking Hall sensor (TAGE) • Faulty capacitive sensor (TAGE) Fault Memory, Electronic Outer Door-Handle Faults detected by the Electronic Outer Door-Handle are stored in a non-volatile memory which is able to store a maximum of 16 faults. The faults are stored in the order in which they occurred. Flash programming forthe Electronic Outer Door-Handle is not planned. Initialization Forthe Comfort Access System, the following components must be initialized after being replaced: • Comfort Access Module • Electronic Outer Door Handles The initialization is triggered by switching ignition to Term R, which results in the CAS transmitting the initialization automatically to the Comfort Access Module. The Comfort Access Module then transmits a signal to the Electronic Outer Door Handles. Initialization can also be performed via a test module for Comfort Access Initialization. 20 E65/66 Comfort Access Check Control Messages There are five Check Control Messages that can be displayed pertaining the the Comfort Access system: Control unit Fixed indicator lamp Variable indicator lamp Check Control message Note in control display CAS CAS Zi KT-9202 Identification trans¬ mitter does not respond! Identification trans¬ mitter not present or malfunctioning, see Owner's Handbook. Eh KT-9164 Identification trans¬ mitter battery flat! Replace battery of identification trans¬ mitter with integrated key, see Owner's Handbook. CAS KT-9114 Identification trans- Comfort access mitter! deactivated. AUTO P is not possible with engine OFF. CAS CAS KT-9114 Take identification transmitter with you when exiting car. Identification trans¬ mitter in car interior! Double locking of car not possible. Remove identifi¬ cation transmitter from car interior. KT-9114 Identification trans¬ mitter not present! Identification trans¬ mitter not in vicinity of car, therefore double locking not possible. Carry identification trans¬ mitter with you. 21 E65/66 Comfort Access