Operation CHARM: Car repair manuals for everyone.

Cellular Phone: Description and Operation






Cellular Telephone and Two-Way Radios

Cellular Phone and Two-Way Radio External Antenna

Radio-based remotes (e.g. for garage door openers) and wireless peripherals (e.g. keyboard or PC mouse) may only be used in vehicle when transmission output of device has a maximum of 100 mW.

Installation of "e-marked units" is only permitted (Europe only).

Cellular phones or other retrofitted two-way units (business equipment) must have "CE mark" (Europe only).

Please follow exactly the operating instructions and installation instructions of the manufacturer of mobile telephones, radio-based devices, and antennas.

The devices' optimal range will only be reached with an exterior antenna.

When telephone and two-way radio systems are installed properly there is no danger to safety system e.g. ABS or airbag. A prerequisite is however that there has been no intervention in their installations. Parallel wiring to such systems must be avoided.

Excessively high electromagnetic fields can arise if mobile telephones and radio devices, with or without an incorrectly installed exterior antenna, are used.

In such a case, damage to health and interference with vehicle electronics cannot be ruled out.

2-Way Radios, Installing and Operating

The transmitting power at the antenna base (see manufacturer's data) may not exceed the applicable maximum values.

You may not use antenna locations other than those shown in the table.

Table Transmitting Power and Antenna Locations, => [ Antenna, Transmitted Output and Installation Locations ] Antenna, Transmitted Output and Installation Locations.

Before starting repair work, batteries must be disconnected!

Use valid current flow diagram

For removing and installing trim,.

Observe manufacturers operating and installation instructions for cellular telephones, two-way radios and antennas.

Secure wiring harnesses to cable ties. Wrap connectors with foam to avoid rattling noises.

Transmitted Output, Installation Locations

Volkswagen permits the installation and operation of radio units, as long as the transmitted power on antenna base, listed in table, is not exceeded. For prescribed antenna locations see table.

Limit according to VDE 0848, part 2 (max. permissible field intensity to protect persons) must be maintained even, if necessary, through reduction of transmission output.

Voltage Supply

When retrofitting transmitter/receiver unit in the vehicle, the battery is used to connect the positive and negative wire.

The wiring harness must be manufactured additionally:

Voltage supply positive via read wire, 2.5 mm2 cross section.

Voltage supply negative via brown wire, 2.5 mm2 cross section.

The positive wire must have a fuse which must be located very close to the battery. Therefore, a fuse holder must be secured next to battery. Both wires must be encased in an insulating hose.

suitable connections must be attached on battery side.

Proceed on unit side according to operating instructions.

The additional wiring harness must be routed separately from vehicle wiring, distance must be at least 10 cm.

For some telephone systems and radio communication units an additional terminal 15 (ignition) is necessary. Then, a black wire connection of 1.5 mm2 cross section must be connected from transmitter/receiver unit to terminal 15a.

When installing, make sure wiring connections are not routed parallel to standard wiring.

Antenna and Antenna Wiring

A shielded wire must be used between transmitter/receiver unit and antenna. Shielding must be grounded to unit and antenna.

At the same time, make sure ground connection of antenna base wire to vehicle body is correct and continuous.

The transmitting system must only be used when shielded to avoid interference in antenna wiring. To ensure the system it is tuned and operating correctly it is recommended that an output/performance check is carried out.

Auxiliary Components

The installation of further electronic equipment like business equipment (e.g., TV, FAX) or household equipment (e.g. electrical cool box) is only permitted if these appliances are marked with a CE or e-sign (Europe only).

Voltage supply must also be routed via separate wiring set and secured by fuse.