Ford TRANSIT 2016.75 Mounting Manual page 149

Start-Stop De-selection (Start-Stop
button with LED illuminated)
The Start-Stop function may be deselected by
the driver by means of the Start-Stop button on
the dash panel. An integral amber LED in the
button illuminates to indicate that the function is
disabled. After ignition OFF and ON, Start-Stop
will be re-enabled. Pressing the button again (LED
not illuminated) will make auto Start-Stop active.
Vehicle Modification Considerations
There are two main considerations: impacts to
Start-Stop behavior as a result of vehicle
modifications and impacts from the Start-Stop
system.
Impacts to Start-Stop Behavior
Inhibitor occurrence may be increased by vehicle
modifications. For example the 12V energy
management system on the vehicle is designed
to allow the engine to shutdown only if the current
drain is less than 60A. High current loads may
lead to this threshold being exceeded. In addition
engine stops will be inhibited if the battery state
of charge is below 68%, which may occur if added
electrical loads are active during key-off periods.
When installing extra peripherals, be aware of the
continuous / quiescent current drain of such
equipment, even when in Off or Standby mode.
Any module should not draw more than 5 mA
(milliamps) in electrical load when off. If current
draw is high at key-off, a different battery system
should be considered instead of the standard fit
battery system. The AGM 2 x 80Ah twin system
which has been engineered to work with
Start-Stop, should be considered if electrical
loads will be high at Engine Run and Off but total
key off load including Ford systems must not
exceed 90mA. Please contact your local Ford
dealer to enquire about this option.
NOTE: Regardless of the battery configuration,
key-off load in excess of 100mA for 7 days or more
will cause Start-Stop to inhibit.
For additional information
Refer to: 4.4 Battery and Cables (page 110).
Battery Monitoring Sensor.
Start-Stop uses a small DC-DC converter (Voltage
Quality Module) to isolate sensitive electrical
modules from the effects of the voltage transient
caused by the starter motor in-rush current when
the engine restarts.
Start-Stop is only designed to operate with the
specified Battery type for the system. Fitting
additional batteries or the incorrect type will cause
incorrect state of charge assessment leading to
Start-Stop becoming permanently inhibited and
therefore the fuel saving features lost. This is the
same as for Smart Regenerative Charging (SRC).
Refer to: 4.3 Charging System (page 103).
SRC.
EU FORD TRANSIT 2016.75
The driver's door switch is used to help identify if
the driver has left the vehicle and prevent engine
shutdowns. If any modifications are made to the
door or switch then this functionality may be
affected. If the driver's door is not used then
ensure this switch is permanently closed (input
grounded).
The system uses signals from switches/sensors
on the clutch, brake and accelerator pedals along
with and the transmission shift mechanism. To
avoid compromising the safety of the system, no
electrical connection should be made to any of
these signals.
Impacts from Start-Stop System
Start-Stop is designed to shut down the engine
when it would otherwise be idling. Some
modifications may rely upon a running engine to
operate. Ford's RPM speed controller will
automatically inhibit Start-Stop from shutting
down the engine when the vehicle is stationary.
Aftermarket systems do not have this facility so
the driver may need to use the Start-Stop button
to disable Start-Stop when such devices are being
used. The starter relay should never be bypassed
or driven directly.
With the Ford-fit RPM controller, please be aware
that the throttle pedal functionality is different.
For instance, if RPM is active, pressing the throttle
pedal will stall the engine. If an RPM controller is
required – it is recommended to use the Ford
engineered system as this is developed with the
Start-Stop System. An aftermarket fit system
may still have the engine switch off when not
expected.
The Special Vehicle Option feature Engine Run
signal, which is a switched ground signal, on a
Start-Stop vehicle is only active when the
vehicle's engine is actually running (for example:
not active during an auto-stop). Any equipment
connected to the Engine Run signal will therefore
experience more cycles than on a conventional
vehicle. Such equipment must ensure that it can
handle a lifetime of 300,000 cycles. A quiet or
silent type relay may also be required as these
increased cycles may be audible to occupants
during Start-Stop Events. Alternatively, consider
packaging the control system away from the
occupants.
All converter fit loads should be connected to
either customer connection points. Converter fit
loads must not be connected to the vehicle start
battery, on a twin battery system.
Date of Publication: 03/2018
149