Start-Stop De-selection (ECO button with
LED illuminated)
The Start-Stop function may be deselected by the
driver by means of the "ECO" 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. This switch also overrides the 110kph
speed limiter. Pressing the ECO button (LED
illuminated) will inhibit the auto start-stop feature
and allow the vehicle to drive to maximum speed
or a higher speed limit value if also fitted. Pressing
the button again (LED not illuminated) will make
auto Start-Stop active and vehicle will be limited
to 110KPH. These are part of the fuel saving
features.
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 50A. High current loads (attached
to the secondary battery) 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 load more than 5 mA
(milliamps) in electrical load when OFF. If this is
the situation, a different battery system should be
considered instead of the standard fit battery
system. The AGM 2 x 95Ah 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 80).
Battery Monitoring Sensor.
The Start-Stop system on Transit employs a
modified version of Ford's patented SureStart®
twin battery system to isolate the vehicle electrical
system from the effects of the voltage transients
from increase starter motor warm crank cycles.
This means, when the engine is restarted, the
auxiliary battery is connected with a delay timer
to avoid the volt drop from these extra warm crank
cycles. Therefore extra electrical loads should
always connect to the auxiliary battery to reduce
the equipments exposure to these transient
voltage drops. (Customer connection points and
so on).
Start-Stop is only designed to operate with two
batteries that are calibrated by 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 an SRC vehicle.
Refer to: 4.3 Charging System (page 74).
SRC.
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 for applications for when the
vehicle is stationary. Aftermarket systems do not
have this facility so the driver may need to use the
ECO 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.
FORD
TRANSIT CUSTOM
2012.75
Date of Publication: 04/2012
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