2008 BMW 135i Repair and Service Manual

65 02 05 (114) Aerial system E70, E71, E81, E82, E87, E88, E90, E91, E92, E93, R55, R56 Introduction The number of radio services (transmission of messages by radio) in the vehicle is constantly growing: Services for communication, navigation, radio and sensor systems. The number or aerials has also increased in line with the additional radio services. > E70 [system overview ...] > E71 [system overview ...] > E81, E87 [system overview ...] > E88 [system overview ...] 7 1/14

Note: The description applies to vehicles with ”High” equipment level. Depending on the vehicle's equipment specification, not all of the aerials described here may be fitted. Attention will be drawn to differences due to certain equipment combinations or national versions. In principle, radio services can be separated into terrestrial services and satellite services. Terrestrial radio services are broadcast via ground aerials (stationary aerials for terrestrial reception). Terrestrial services include: Satellite services include: Aerials for vehicle systems (the aerials themselves are not dealt with in this SBT): Most aerials are integrated in the rod aerial, roof-mounted aerial, side window and in the rear window. > E82, E90, E92 [system overview ...] > E91 [system overview ...] > E93 [system overview ...] > R55 [system overview ...] > R56 [system overview ...] - AM-FM radio transmitters (analogue) - DVB-T (Digital Video Broadcasting - Terrestrial) - TV transmitters (analogue) - DAB (Digital Audio Broadcasting). DAB makes digital radio reception possible. - GSM dual band 900/1800 MHz (for mobile phones) - GPS (signals for navigation) - SDARS (Satellite Digital Audio Radio Service, US version only) - Aerials for remote control or Comfort Access - Bluetooth aerial for connecting mobile phones to the vehicle > E93 The E93 (Convertible) has no visible aerials apart from the SDARS aerial (US version) on the tailgate. Different aerials are used for radio reception depending on the position of the convertible hardtop (closed or open). Convertible hardtop closed:  Radio reception using aerials (AM, FM 1, FM 3) in the rear window Convertible hardtop open: 7 2/14

 Radio reception using aerials (AM, FM 1) in the rear left side trim and the aerial (FM 3) in the rear right side trim Brief description of components The aerials supply signals for the aerial system: - FM aerial The FM aerial receives radio stations and traffic information in the FM (VHF) range (FM stands for ”Frequency modulation”). The number of FM aerials installed in the aerial system varies: > E81, E87, E93 4 FM aerials (FM 1, FM 2, FM 3, FM 4) > E70, E71, E82, E88, E90, E91, E92, plus R55, R56 3 FM aerials: (FM 1, FM 2, FM 3) For space-saving reasons, the FM 4 aerial does not exist physically. The FM 4 aerial is formed from the HF signal of the FM 1 and FM 2 aerials by way of heterodyning. This improves FM reception. - AM aerial The AM aerial receives radio stations in the SW, MW and LW ranges (SW stands for ”short wave”; MW stands for ”medium wave and LW stands for ”long wave”). - TV aerial The TV aerials receive analogue or digital television signals. - DAB aerials (Europe version) The DAB aerials picks up high-frequency signals (digital signals) from the radio transmitters (DAB: Digital Audio Broadcasting). Different DAB aerials are used for radio reception:  DAB L aerial (frequency range: L-band) The DAB aerial is used for reception in urban areas.  DAB III aerial (frequency range: III-band) The DAB aerial is used for regional reception. - GPS aerial The GPS aerial picks up navigation signals transmitted by GPS satellites (GPS:. Global Positioning System). - Telephone aerial 7 3/14

The telephone aerial is designed for the GSM mobile communication network and for other services, e.g. CDMA. (GSM stands for ”Global Standard for Mobile Communication”; CDMA stands for ”Code Division Multiplex Access”) - Emergency GSM aerial The emergency GSM aerial is installed in vehicles with TCU (TCU stands for ”Telematics Control Unit”) An emergency call can be transmitted through the emergency GSM aerial if the external telephone aerial is not working, because of an accident, for example. [more ...] - SDARS aerial (US version) > E70, E71, E82, E88, E90, E91, E92, E93 plus R55, R56 High-frequency signals (digital signals) from satellites and stationary aerials for terrestrial reception are picked up by an SDARS aerial on the vehicle. (SDARS stands for ”Satellite Digital Audio Radio Service”) An aerial cable routes the signals to the satellite tuner. [for more information, please refer to SI Technology (SBT) 65 03 03 058] - VICS aerial (Japan version) Information relating to the current road traffic situation is acquired from several locations and transferred to the VICS control centre. (VICS stands for ”Vehicle Information and Communication System”) Information is provided by radio and infrared transmission for the current stretch of road. Information is provided both in text and graphic form. > E70, E71 The E70, E71 has 2 aerials. One aerial is integrated in the interior mirror, the other in the rear window. > E81, E82, E87, E90, E91, E92 The aerial is integrated in the interior rear-view mirror. > E88, E93 The aerial is installed in the mirror base of the inside mirror. > R55 The R55 has 2 aerials. One aerial is integrated in the interior mirror, the other in the rear left side window. > R56 The R56 has 2 aerials. One aerial is integrated in the interior mirror, the other in the rear window. 7 4/14

The individual aerials are integrated in the aerial system as follows: - Aerials in rod aerial [more ...] > E81, E87 The rod aerial contains the aerials for AM, FM 1, telephone, GPS and DAB (frequency range: L-band). > E88 The rod aerial contains the aerials for AM, FM 1 and telephone. > R55, R56 Depending on the vehicle's equipment specification, up to 6 different equipment versions are possible. - Aerials in the roof-mounted aerial > E70, E71, E82, E90, E91, E92 The following roof-mounted aerials are fitted:  Roof-mounted aerials with aerials for telephone, GPS and DAB (Europe version).  Roof-mounted aerial with telephone, telephone 2, GPS and SDARS (US version) The US version of the roof-mounted aerial is noticeably larger than the Europe version. Depending on the vehicle's equipment specification, up to 5 different equipment versions are possible. [more ...] - Aerial in the rear window > E70, E71, E82, E87, E90, E91, E92, E93, R56 Conductors pressed onto the heated area of the rear window act as aerials. The heated area connections for the heated rear window are decoupled from the aerials by rejector circuits. [more ...] - Aerials in side window > E70 The television aerial (TV 2) is integrated into the rear right side window. The following aerials are integrated into the rear left side window:  TV aerial (TV 1)  DAB aerial (frequency range: III-band) [more ...] > E91 The television aerial (TV 2) is integrated into the rear right side window. The television aerial (TV 1) is integrated into the rear left side window. 7 5/14

[more ...] > R55 The television aerial (TV 2) is integrated into the rear right side window. The following aerials are integrated into the rear left side window:  TV aerial (TV 1)  DAB aerial (frequency range: III-band)  FM aerial (FM 2)  FM aerial (FM 3)  VICS aerial (VICS 2) for Japan navigation system > R56 in Japan national version One TV aerial is integrated in the rear left and rear right side window. The TV aerials (TV 3 on the left in the direction of travel; TV 4 on the right in the direction of travel) have their own TV aerial amplifier. The aerial amplifier sends the signals from the 2 TV aerials to the control unit for the Japan navigation system. - Aerial on tailgate The aerial on the tailgate is of a similar design to the roof aerial, but it is much flatter. > E88 Europe version DAB aerial (frequency range: L-band) > E88, E93 US version SDARS aerial - Aerials in the rear left and rear right side trims > E93 When the convertible hardtop is open, radio stations are received using the aerials in the rear right and rear left side trims. The following aerials are fitted in the rear left and rear right side trims:  AM and FM aerial (FM 1)  FM aerial (FM 3) [more ...] - Aerials under the rear bumper trim The following aerials are installed under the rear bumper trim: > E71  TV aerial (TV 2): 7 6/14

under the rear left bumper trim  TV aerial (TV 3): under the rear right bumper trim [more ...] > E81, E87  Telephone aerial (GSM 1): under the rear left bumper trim > E88  FM aerial (FM 2) under the rear centre bumper trim  FM aerial (FM 3): under the rear left bumper trim  Telephone aerial (GSM 2) for telematic services: under the rear left bumper trim  DAB aerial (frequency range: III-band) under the rear right bumper trim [more] > E93   FM aerial (FM 4): under the rear left bumper trim  TV aerial (TV 1): under the rear left bumper trim  GSM aerial (GSM 2): under the rear left bumper trim   FM aerial (FM 2): under the rear centre bumper trim   DAB aerial (DAB III): under the rear right bumper trim 7 7/14

The following components are involved in operation of the aerial system: Note: From 03/2008, aerial diversity is discontinued on the E81, E87 with BMW Audio radio (basic version). From 03/2008, aerial diversity is discontinued on the E81, E87 with BMW Audio radio (basic version) The combination BMW Audio radio (basic version) and aerial diversity is only possible in conjunction with option 676 ”HiFi loudspeaker system”.  TV aerial (TV 2): under the rear right bumper trim [more ...] - Aerial behind the front left wheel arch cover > E93 The telephone aerial is fitted behind the front left wheel arch cover. The telephone aerial (GSM 1) is directly connected to the eject box. - Aerials in cowl panel > E93  DAB aerial (frequency range: L-band)  GPS aerial - Aerials in the folding top compartment lid > E88 The GPS aerial is installed from below in the folding top compartment lid, left. - Aerial amplifier with aerial diversity for FM The aerial amplifier compensates for losses that occur in the aerial line. The aerial diversity function makes available the signal from the aerial with the best reception to the radio. > E81, E87 The aerial amplifier for the FM aerial (FM 1) and for AM aerial is located in the base of the rod aerial. The aerial amplifier with aerial diversity for the FM 2 to FM 4 aerials is installed on the inside of the boot lid above the rear window in the area of the auxiliary brake light. - > E88 The aerial amplifier for the FM aerial (FM 1) and for AM aerial is located in the base of the rod aerial. The aerial amplifiers for the FM aerials (FM 2, FM 3) are integrated in the aerial amplifier with aerial diversity. The aerial amplifier with aerial diversity is at the rear left in the luggage compartment. > E70, E71, E82, E90, E91, E92 7 8/14

[more ...] The aerial amplifier with aerial diversity is installed above the rear window in the area of the auxiliary brake light. Other aerial amplifiers are also housed in the AM/FM aerial amplifier housing:  Aerial amplifier for television aerial > E82: TV function cannot be ordered as special equipment.  Aerial amplifier for DAB (Digital Audio Broadcasting) Moreover, the remote control receiver for unlocking the vehicle is also integrated into the module. > E93 The aerial amplifier with aerial diversity is at the rear left in the luggage compartment. The following aerial amplifiers are fitted in the aerial amplifier housing:  Aerial amplifier for FM aerial (FM 2)  Aerial amplifier for FM aerial (FM 4) > R55 The aerial amplifier with aerial diversity is installed at the top of the left-hand C-pillar. Other aerial amplifiers are also housed in the AM/FM aerial amplifier housing:  Aerial amplifier for TV aerial (TV 2)  Aerial amplifier for DAB (Digital Audio Broadcasting) > R56 The aerial amplifier with aerial diversity is located on the inside of the tailgate, under the rear window (between the rear window wiper and the C-pillar). Other aerial amplifiers are also housed in the AM/FM aerial amplifier housing:  Aerial amplifier for TV aerials (TV 1 and TV 2)  Aerial amplifier for DAB (Digital Audio Broadcasting) - Compensator The compensator equalises losses in the telephone aerial wire. The compensator can be retrofitted at the customer's express wish to improve reception. [more ...] - Suppressor filter The suppressor filter suppresses interference from the rear window aerials in the additional brake light wires. Filter circuits in the interference suppression filter are designed to suppress conducted interference. The interference suppression filter is located in the positive and earth cable of the auxiliary brake light. > E81, E87 7 9/14

No interference suppressor fitted (suppression filter not needed). > E91 The interference suppression filter is additionally installed in the positive and earth wires for the heated rear window. - Rejector circuit for heated rear window The current to the conductors in the rear window is fed through 2 rejector circuits. The rejector circuits act as throttles to reduce the transmission of interference pulses in the aerials from the vehicle electrical system. A rejector circuit is integrated into the earth wire on the left-hand side of the rear window. An identical rejector circuit is integrated into the positive (+) wire on the right-hand side of the rear window. > E70 The rejector circuit is installed at the top of the left-hand C-pillar. > E71 The rejector circuits are located in the tailgate above the rear window. > E81, E87 The rejector circuits are located in the tailgate under the rear window. > E82, E90, E92, E93 The rejector circuits are located on the left and right-hand sides under the C-pillar trim. > E91 The rejector circuits are integrated in the interference suppression filter. > R55 A rejector circuit is located in each split door, above the rear window. > R56 The rejector circuits are located in the tailgate under the rear window. - TV aerial amplifier Each television aerial is connected to a TV aerial amplifier. The TV aerial amplifier compensates for losses that occur in the aerial line. The TV aerial amplifiers are powered remotely by the video module. > E70 3 TV aerial amplifiers are connected to the video module. > E71 The TV aerial amplifier for TV 1 is integrated in the aerial amplifier for AM and FM. The TV aerial amplifier for TV 2 and TV 3 are connected directly to the video module. 1 10/14

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2008 BMW 135i Repair and Service Manual

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