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2
Electrical connections
Install all cables with care. For wiring details, refer to the connection diagram on the
back fold-out page and the following table.
Do not cut non-assigned wires. Instead, wind them together and secure to one side.
They may be required for retrofitting additional functions.
Connection overview, ISO chamber A, Fig. 2:
Pin
Connection
A1
Input digital speedometer signal / SDVC
A2
Switch input reversing signal (reversing light positive)
A3
No function
A4
+ 12 V ignition positive/ Accessory contact (Terminal 15)
A5
Switch output for electronic antenna/ relay motor antenna
A6
Switch input pilot light
A7
+ 12 V permanent positive (terminal 30)
A8
Battery negative (terminal 31)
A
Connect electrical signals only to suitable points in the vehicle.
A
If a separate connection is made directly to the battery, protect the positive lead with
a 10-A fuse close to the battery (max. distance of 10 - 15 cm).
Digital speedometer signal (A1):
A digital speedometer is required for correct functioning of the navigation system. An-
alogue 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: < 1 V
High - level: 4 V - 24 V
Notes: Many vehicles are equipped with a digital speedometer signal on one of the ra-
dio connectors. Notes on vehicle-specific information regarding the speedometer sig-
nal and the above-mentioned accessories can be obtained from your installation ser-
vice or from our Customer Help Desk.
Operation of the navigation system is possible without a speedometer signal. Ho-
wever, 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.
Installation instructions
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