3308541 - 5505A multi-function components
JUNCTION
UNITS
This model is fitted with two
junction units: a main junction unit (1) located underneath the
dashboard to the left of the steering column and an auxiliary junction
unit (2) positioned in the engine compartment.Main junction unit
Pin-out
Auxiliary junction unit
INTEGRATED MULTISERVICE CONTROL UNIT
General description
The integrated multiserve control
unit (1) is located beneath the driver's side facia trim. It manages
the following functions in integrated manner:
- side lights (2)
- number plate lights (3)
- parking lights
- brake lights (stop) (4)
- rear fog lamps (5)
- fog lights (6)
- dipped headlamps relay (7)
- dim dip headlamps relay feed
- warning lights in control panel (side lights, fog lights,
rear fog lamp, heated rear window, heated windscreen and handbrake)
(8)
- heated rear windscreen timer (9).
The integrated multiservice control
unit is fitted with a microprocessor and static electronic components
which have the task of:
- receiving the signal for operating the switches/remote
control switches
- activating the consumers (bulbs)
- carrying out the fault diagnosis and transmitting it.
Each input is protected by filters against
electrostatic discharge or radio signals.The exterior lights are activated by semiconductor
switches which simultaneously check and control the function.Faults in the above mentioned bulbs are
signalled to the control panel via a dedicated line.The integrated multiservice control
unit comes on when the following conditions exist:
- ignition key in ON position
- parking lights go ahead.
If neither of these conditions are met,
the control unit is deactivated and the stand-by mode is engaged.Side lights and number plate lights
The side lights are enabled if the
following conditions exist:
- ignition key in ON position
- side lights switch activated.
The control unit sends a signal to turn
on a side light warning light located on the control panel.Parking lights.
The parking lights are enabled if
the following conditions exist:
- no signal for key in ON POSITION
- parking lights switch activated.
The side lights are used as parking
lights:
- both parking lights come on, the warning light in the
control panel is on and the number plate light is on when the parking light
switch is turned on
- the left parking light is on when the parking light switch
and the left direction indicator are turned on
- the right parking light comes on when the parking light
switch and the right direction indicator are turned on.
Car brake lights
The brake lights are enabled if the
following conditions exist:
- ignition key in ON position
- switch on brake pedal activated.
The vehicle brake lights system is controlled
by the integrated multiservice control unit.Rear fog lamps
The rear fog lamps are enabled if
the following conditions exist:
- ignition key in ON position
- rear fog lamps button activated.
- dipped headlamps or fog lights activted signal.
The control unit sends a signal to turn
on the rear fog lamp warning light located on the control panel.If there is a change to the lights (dipped
headlamps, main beam headlamps, fog light), the rear fog lamps should
not go out.The rear fog lamps should be deactivated
if:
- they are deactivated via the rear fog lamps button
- there is no ignition ON signal
- there is no dipped headlamps/main beam headlamps/fog lights
on signal.
Fog lights
The fog lights relay feed is activated
if the following conditions exist:
- ignition key in ON position
- side lights switch activated
- fog lights button activated.
The control unit sends a signal which lights
up the fog lights warning light in the control panel.Dipped beam headlamps
The dipped beam headlamps relay feed
is activated if the following conditions exist:
- ignition key in ON position
- dipped headlamps/main beam headlamps switch activated.
The dipped headlamps warning light in the
control panel is operated by the dipped headlamps relay.Handbrake warning light
The handbrake warning light is activated
if the following conditions exist:
- ignition key in ON position
- switch on handbrake lever activated.
Under these conditions, the handbrake warning
light in the control panel should flash at a rate of 1.5 Hz with
a 50% duty cycle.Heated rear windscreen timer
The heated rear windscreen timer
relay is activated when the following conditions exist:
- ignition key in ON position
- heated rear windscreen timer button activated.
Activation only occurs when the switch is
released to prevent the heated rear windscreen being on constantly
if there is a short circuit in the integrated multiservice control
unit input.The integrated multiservice control
unit output which controls the heated rear windscreen can be deactivated:
- manually, by pressing the control switch or if there is
no ignition ON signal
- automatically, after 60 minutes of actual heated rear
windscreen operation.
The automatic operation of the heated
rear windscreen is basically connected to the:
- engine rpm signal
- battery voltage
- logic for switching the heated rear windscreen on/off
- control panel go ahead.
The logic for switching the heated
rear windscreen on/off is as follows:
- for the first 10 minutes the operation does not depend
on the engine speed
- once this time is exceeded, if rpm level is lower than
1000 rpm, the rear window element must be disconnected after an interval
of 10 seconds. If rpm exceeds 1000 rpm for at least 10 seconds,
the rear window element comes on, or stays on if already active,
until it has effectively been operating for 60 minutes.
During the entire automatic operating range,
the heated rear windscreen relay should be switched off when the
battery voltage goes below 8.,5 V for 150 msec.The engagement of the heated rear windscreen
turns on the warning light in the control panel which remains on
constantly for a maximum of 60 minutes during the automatic operation.The warning light goes off only if the heated
rear window is disconnected manually.Preparation for tow hook
The preparation for the two hook
consists of:
- vehicle brake lights
- rear fog lamps
- side lights and parking lights for all side lights.
The above outlets are activated to earth
when the relevant functions are switched on by the user.Fault diagnosis
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