Filter
Top Products
Connection overview, ISO chamber A, Fig. 2:
Pin Connection
A1 Input digital speedometer signal / SDVC
A2 Switch input reversing signal (reversing light plus)
A3 Switch input telephone mute function
A4 + 12 V permanent positive; terminal 30
A5 Switch output for electronic antenna /relay motor antenna
A6 Switch input pilot light
A7 +12 V ignition positive; terminal 15 (without switch-off on starting engine)
A8 Battery negative; terminal 31
A
Only connect electrical signals to suitable connecting points in the vehicle.
A
If separate connection is made directly to the battery, protect the positive lead with a
10 A fuse close to the battery (max. distance 10 to 15 cm).
■
Digital speedometer signal (A1):
A digital speedometer is required for correct functioning of the navigation system.
Analogue speedometer signals are not supported by the system.
☞
Connect pin A1 to the vehicle speedometer signal.
A
Never collect the speedometer signal directly from the ABS control or the CAN bus.
Digital speedometer signal requirements:
Frequency: 0 Hz - 4 kHz square-wave signal (no inductive sensor)
Low - level:<1V
High - level:4V-24V
Notes: Many vehicles are equipped with a digital speedometer signal on one of the
radio connectors. Notes on vehicle-specific information regarding the speedometer
signal and the above-mentioned accessories can be obtained from your installation
service or from our Customer Help Desk.
Operation of the navigation system is possible without a speedometer signal.
However, in the absence of a speedometer signal the following functional restrictions
may arise:
–
Inaccurate navigation
–
Inaccurate or invalid information in trip computer
–
Limitations with regard to SDVC (speed-dependent volume control)
If your vehicle is not equipped to produce a digital speedometer signal, an optional
speed sensor can be installed. This is available as an accessory from your installation
service.
Mechanical speedometer
A digital speedometer signal can be obtained through the installation of a VDO
X39-397-106-191 speed sensor in the speedometer drive shaft.
CAN bus
In many vehicles, speed, reversing and light information can be read out from the
vehicle’s CAN bus and converted into the appropriate signals for the navigation system
using an adapter.
Universal installation
If none of the above-mentioned options are possible, the wheel speed can be
converted into a digital speedometer signal by means of an MA 3400/00 magnetic field
sensor and magnetisation of a tyre.
INSTALLATION INSTRUCTIONS
16