INSTALLATION GUIDE
- The HFU-4 and the different parts are connected as mentioned in the section "Component parts".
- There are some important aspects that require special attention when positioning the car kit accessories.
- The location of the holder should be selected so that the visibility of the phone’s display is good and the driver’s attention is not distracted. The location of the holder should allow the driver to easily reach the keypad. Under no circumstances should the holder prevent the driver from controlling or operating the vehicle in any way.
- The HF microphone should be installed according to the instructions given in the separate microphone installation guide. Ensure that the microphone is as close to the driver’s mouth as possible, and attached to a surface that is mechanically quiet. The microphone should be mounted at least 1 m (3 ft) away from the hands free unit speaker to avoid acoustic feedback.
- Make sure that the cables are routed as far away as possible from the vehicle’s electronic systems. This is to prevent interference. Also, ensure that cables are not subject to undue mechanical stress, e.g., under seats or against sharp edges.
Note: Ensure that the
vehicle’s battery is disconnected before you start the installation procedure
or before making changes to the installations, and that it remains disconnected
during the installation procedure.
PCU-4
The cables from the
PCU-4 are colour coded. They are listed in column A of the following table and
each cable should be connected to the corresponding item listed in column B.|
A
|
B
|
|
Red
cable (with 2 amps fuse)
|
The
+ voltage on the vehicle's power supply.
|
|
Blue
cable (with 1 amp fuse)
|
The
+ 12V voltage controlled by the vehicle's ignition key. (refer to section "Ignition
Sense IGNS”)
|
|
Yellow
cable
|
Used
for car radio muting (CRM) and is connected to car radio. The line goes down
to 0 volts during a call. See section "Car Radio Muting CRM".
|
|
|
|
Ignition
sense IGNS
The ignition sense feature prevents
your car kit from draining the car battery by executing an auto power off in 20
seconds after the ignition key has been turned off. The blue cable from PCU-4
is used for the ignition sense feature. The use of ignition sense is
recommended to prevent accidental draining of the car battery. The cable is
connected via a 1 A fuse to a 12 volt supply that is controlled by the ignition
key. Do not connect it directly to the high voltage sections of the ignition
circuit. Check the availability of the feature in your phone´s user´s guide.
Car radio muting CRM
The car kit includes
a feature that can mute the car radio automatically during a phone
conversation. Below is the circuit diagram for CRM.
- Note: The contacts of the relay 12 V DC must stand the maximum current consumed by a radio, and the impedance of the relay coil must be over 100 ohm when the supply of the relay coil is <16 V DC.
- Alternatively, you can use a special muting unit, which mutes the radio by connecting load resistors to the speaker lines of the car radio.
- A third possibility for the customer is to refer to the car radio user manual to determine whether there is a CRM cable or point of connection in the car radio available. Then the CRM line from Cark126 can be directly connected to either of those.
- All installations should take into account any special requirements on behalf of the customer. However, should the customer require an installation that is illegal or unsafe, these facts must be pointed out to the customer and a policy of non-compliance adopted.
Testing
Once installed, the equipment should
be tested to ensure that it operates satisfactorily and that the position of
the units does not impair the driver’s ability to control and operate the
vehicle in any way.
