2011 FORD KUGA Ambient temperature sensor

Ambient Air Temperature Sensor(34 676 0)
Removal
1.
2.
Installation
1.
To install, reverse the removal procedure. G1158234en
2008.50 Kuga 8/2011 412-01-76
Climate Control
412-01-76
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reprogrammed. However, if the engine hasn't been
run since the last programmed start, the fuel-fired
booster heater will not start up the second time so
as to prevent the battery from being discharged.
The length of time required to pre-heat the vehicle
is calculated in the control unit of the fuel-fired
booster heater and is based on two temperature
values:
• Ambient air temperature: this message is taken
from the GEM via the CAN bus.
• Coolant temperature: this is determined via an internal sensor in the fuel-fired booster heater.
The maximum heating time is 30 minutes at an
outside air temperature of -10 °C or lower. The
heating time decreases proportionally with
increasing ambient temperature until the ambient
temperature is between +15 °C and +20 °C. Then
the minimum heating time is 10 minutes. The
parking heater is deactivated at temperatures
above +20 °C.
The sequence for a programmed start of the
booster heater is as follows:
• Two minutes before the start of the maximum heating time the driver information
system/instrument cluster sends an activation
message to the fuel-fired booster heater via the
CAN bus.
• The fuel-fired booster heater calculates the required heating time and, if necessary, sends
a delay request on the CAN bus.
• At the calculated time, the fuel-fired booster heater starts up. The conditions for start-up are:
engine not running and amount of fuel in the
fuel tank is above 14% of maximum.
• When the coolant temperature reaches +30 °C, the control unit of the fuel-fired booster heater
sends a request to switch on the passenger
compartment blower.
• Eight minutes after the programmed switch-off time, the booster heater stops heating mode
and starts a run-on operation to clean the
system's spark plugs.
• Ten minutes after the switch-off time, the post-cleaning operation is complete. The
additional ten minutes run-on time provides
some leeway in case the driver is late arriving.
After a programmed start-up of the booster heater
it is switched off again after the heating time has
elapsed (or if the fuel level in the fuel tank drops
below 8%). The booster heater stops within 2 minutes of the engine starting. This leaves enough
time to check whether the switch-on conditions for
boost heat mode have been met, thus preventing
the booster heater from having to switch off and
switch back on again. The heater can be switched
off manually at any time from the menu.
Whilst the fuel-fired booster heater is in additional
heating mode and/or parking heating mode, the
instrument cluster receives a fuel consumption
signal; this is used to re-calculate the vehicle's
remaining range and fuel consumption data.
Emergency shutoff
In the event of an accident in which the airbags
are deployed, the control unit of the fuel-fired
booster heater receives a message on the CAN
bus from the restraints control module (RCM).
When this message is received, the booster heater
system switches off immediately.
The booster heater control module deactivates the
system and does not respond to further messages
on the CAN bus. The booster heater control module
needs to be activated with WDS.
Component Description
Electric Booster Heater
The electric booster heater consists of three
individual heating elements, which are incorporated
into a single housing. It is controlled by the generic
electronic module (GEM), taking into account the
following factors:
Detailed illustration of fuel-fired heater
G1066982en
2008.50 Kuga 8/2011 412-02-14
Auxiliary Climate Control
412-02-14
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Description
Item
Instrument Cluster
1
PCM (powertrain control module)
2
EHPS (electro-hydraulic power steering)
control module
3
Audio unit
4
GEM (generic electronic module)
5
RCM (restraints control module)
6
PATS transceiver
7 Description
Item
Steering wheel lock module
8
Left-hand steering column switch
9
Fuel level sensor
10
Washer water level warning lamp switch
11
Accelerator pedal position sensor
12
CPP (clutch pedal position) sensor/BPP
(brake pedal position) sensor
13
Lighting control switch
14
System Operation
Instrument Cluster
The instrument cluster contains analog displays
as well as warning and control lamps for displaying
the system status; in addiiton, there is an LCD
indicator field for driver information.
The instrument cluster receives the following
signals from the PCM via the high speed CAN
(controller area network) Bus (HS-CAN):
• Vehicle speed – The PCM receives the necessary signalsfrom the ABS (anti-lock brake system) wheel
sensors from the ABS control unit on the
HS-CAN.
• Engine Coolant Temperature
• Engine oil pressure.
• Engine speed
The instrument cluster receives the following
signals from the GEM via the medium speed CAN
Bus (MS-CAN):
• Ambient temperature
• Brake fluid level
• Handbrake control
• Door latch control
• Liftgate latch control
• High beam control
• Headlamp flasher control
• Direction indicator control
The fuel level signal is sent by the two fuel level
sensors in the fuel pumps in the semitrailer tank,
which is wired to the instrument cluster. The
sensors are connected in series, and the total
resistance is determined from the two individual resistors. The instrument cluster converts the raw
fuel level signal into a damped fuel level value.
The odometer shows the total distance travelled
by the vehicle and is based on the same signal as
is processed for the daily mileage counter. The
value is recorded by the instrument cluster and
stored in a protected EEPROM (Electronically
Erasable Programmable Read Only Memory) area.
This area is a memory protected against
manipulation. If the instrument cluster detects an
error in this memory area, e.g. through damage,
the driver is notified with the "Odometer error"
message.
Message center
The message center is operated using the left-hand
switch on the steering column.
The SET/RESET button is activated to select a
submenu and change the settings. If signal tones
have been activated, a short acoustic signal will
sound each time a button is pressed.
By turning the rotary switch, the different menu
displays can be scrolled through or a setting
selected.
In this display, the navigation system can also
display direction and distance information.
In addition, safety and warning messages can be
displayed in this system, such as "Coolant
overheating", "Engine system error" or "Washer
fluid level too low". In addition to a safety message,
a general warning light (red/yellow) lights up.
G1030770en
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Instrument Cluster
413-01-4
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SECTION 419-10 Multifunction Electronic Modules
VEHICLE APPLICATION:
2008.50 Kuga
PAGE
CONTENTS
DESCRIPTION AND OPERATION
419-10-2
Module Controlled Functions (Overview)...........................................................................
419-10-2
Generic electronics module (GEM)....................................................................................
419-10-2
Emergency function............................................................................................................
419-10-2
Service mode......................................................................................................................
419-10-4
Module Controlled Functions (System Operation and Component Description)................
419-10-4
System Diagram.................................................................................................................
419-10-6
System Operation...............................................................................................................
419-10-6
GEM. ...............................................................................................................................
419-10-6
Component Description......................................................................................................
419-10-6
Battery charging (Smart Charge)....................................................................................
419-10-7
Ignition overload protection.............................................................................................
419-10-7
Headlamp switch-off delay..............................................................................................
419-10-8
Turn signals....................................................................................................................
419-10-8
Interior lighting................................................................................................................
419-10-8
Heated windscreen.........................................................................................................
419-10-9
Heated rear window and heated external mirrors...........................................................
419-10-9
Ambient air temperature.................................................................................................
419-10-9
Brake fluid level...............................................................................................................
419-10-9
Automatic headlamps.....................................................................................................
419-10-9
Combined rain sensor/light sensor.................................................................................419-10-10Windshield wash/wipe system........................................................................................
419-10-10Anti-theft ..........................................................................................................................
419-10-10Electric booster Heater...................................................................................................
419-10-10Climate control................................................................................................................
DIAGNOSIS AND TESTING 419-10-11
Generic Electronic Module (GEM)......................................................................................
419-10-11
Description of operation......................................................................................................
419-10-12
Inspection and Checking....................................................................................................
REMOVAL AND INSTALLATION 419-10-14
Generic Electronic Module (GEM)......................................................................................
419-10-15
Lighting Control Module (LCM)........................................................................................... 419-10-1
Multifunction Electronic Modules
419-10-1
.
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Description
Item
HS CAN
1
DLC2
MS CAN
3
Instrument cluster (gateway)
4
Front windshield wiper motors
5
GEM6
Rear window wiper motors
7
Indicator/heated windshield
8
Indicator/heated rear window
9 Description
Item
Mini-liftgate latch motor
10
Liftgate latch motor
11
Electric booster Heater
12
Front wiper windscreen washer pump
13
Rear wiper windscreen washer pump
14
Headlamp
15
Courtesy Lighting
16
Alarm horn
17
System Operation
GEM.
The following functions are controlled or performed
by the GEM at a battery voltage of between 9 and
16 volts:
• Current distribution
• Battery charging (Smart Charge)
• Ignition overload protection
• Headlamp switch-off delay
• Turn signals
• Interior lighting
• Heated windscreen
• Heated rear window and heated external mirrors
• Ambient air temperature
• Brake fluid level
• Automatic headlamps
• Combined rain sensor/light sensor
• Windshield wash/wipe system
• Speed control – reads the speed control switches andtransmits signals on the CAN data bus
• central door locking – transmits signals on the CAN data bus
• Anti-theft
• Electric booster Heater
• Climate control
• Parking brake –(monitors the switch and transmits the signal
on the CAN data bus
• Communication via the medium-speed CAN data bus Component Description
Battery charging (Smart Charge)
In addition to the familiar functions, the Smart
Charge system also performs the following
functions:
•
Automatic deactivation of non-critical high power
electrical consumers when the battery voltage
is low in order to reduce the level of current
drawn.
• Automatic activation of non-critical high power electrical consumers when the battery voltage
is excessively high in order to protect
components which are sensitive to increased
voltages.
The battery charging current is optimized through
continuous calculation of the battery temperature
and monitoring of the alternator output voltage.
The alternator load is signaled to the PCM
(powertrain control module) in order to provide it
with an early indication when an electric component
is to be switched on or off, thereby also providing
information about imminent changes to the amount
of torque demanded by the alternator. By
evaluating this information the PCM is capable of
increasing the stability of the engine under idling.
The two remaining functions of the Smart Charge
system are controlled by the GEM. G1030788en
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Multifunction Electronic Modules
419-10-6
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• 4 minutes have elapsed since the button for the
heated windshield was pressed.
• The ignition switch is turned to the "I" or "0" position.
• The "Defrost" function is deactivated or the switch for the heated windscreen is pressed
again while the heated windscreen is still
switched on.
• The charging system warning indicator is switched on.
• The battery voltage falls below the threshold value for low battery voltage for more than 20
seconds (power management strategy). Manual
requests for switching on the heated windshield
by pressing the switch are ignored at this time.
• More than 4 minutes have passed since starting
the engine.
Heated rear window and heated external
mirrors
The GEM transmits a request signal via the CAN
bus to the door modules to switch on the heated
exterior mirrors.
The heated rear window and the heated exterior
mirrors are switched on by the GEM under the
following conditions:
• The switch for the heated rear window is pressed and the ignition switch is in the "II"
position.
• The "defrost" function of the air conditioning is activated and the ignition switch is in the position
"II".
• The battery voltage has exceeded 16 V for more
than 20 seconds (power management strategy).
Manual requests to switch off the heated rear
window by pressing the button are ignored at
this time.
• The engine was started at an outside air temperature below 4°C and an engine
temperature below 65°. Manual requests for
switching off the heated rear window by pressing
the switch are accepted.
NOTE: If the battery voltage returns to the normal
range then the disabling of the heated rear window
is cancelled - the heated rear window is then in a
switched-off state.
The GEM transmits a request signal via the CAN
bus to the door modules to switch off the heated
exterior mirrors. The heated rear window and the heated exterior
mirrors are switched off by the GEM under the
following conditions
• 14 minutes have elapsed since the button for
the heated rear window was pressed.
• The ignition switch is turned to the position "0", "I" or "III".
• The switch for the heated rear window is pressed or the "defrost" function of the air
conditioning is deactivated while the heated rear
window is switched on.
• The battery voltage has dropped below 10.3 V for more than 20 seconds (power management
strategy). Manual requests for switching on the
heated rear window by pressing the switch are
ignored at this time.
• More than 14 minutes have passed since starting the engine.
Ambient air temperature
The ambient air temperature sensor is connected
via a cable to the GEM. It measures the outside
air temperature to an accuracy of around ±0.5 °C.
The GEM broadcasts the ambient air temperature
on the medium speed CAN bus, where it can be
evaluated by various systems.
Brake fluid level
The brake fluid level switch is connected via a
cable to the GEM.
The GEM transmits a message on the medium
speed CAN bus. The instrument cluster then
transfers this message to the high speed CAN bus
where it is made available for various other
functions.
Automatic headlamps
Refer to: Exterior Lighting (417-01 Exterior Lighting,
Description and Operation).
Combined rain sensor/light sensor
Refer to: Exterior Lighting (417-01 Exterior Lighting,
Description and Operation). G1030788en
2008.50 Kuga 8/2011 419-10-9
Multifunction Electronic Modules
419-10-9
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Description
Item
Catalyst monitor sensor
1
Fuel pressure/fuel temperature sensor
2
Throttle control unit
3
Ambient air temperature sensor
4Description
Item
MAPT sensor
5
KS (knock sensor)
Comments:Two, on 2nd and 4th cylinder
6
E96980
1
234
Description
Item
EVAP valve
1
Wastegate control valve
2Description
Item
Turbo boost pressure controller
3
HO2S (heated oxygen sensor)
4
G1021906en2008.50 Kuga8/2011
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Electronic Engine Controls— 2.5L Duratec (147kW/200PS) - VI5303-14-
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current value is reached. The PCM then
permanently connects the heating element to earth.
The catalyst monitor sensor is used by the PCM
to measure the oxygen content in the exhaust gas
in the TWC. If all the conditions for catalyst
diagnostics are met, based on this information the
PCM can check that the TWC is working
satisfactorily. The information is also used to
improve the air/fuel mixture adjustment.
The catalyst monitor sensor is similar in function
to an HO2S. The signal transmitted by the catalyst
monitor sensor changes sharply if the oxygen
content in the exhaust gas changes. For this
reason, catalyst monitor sensors are also called
"jump lambda sensors".
Fuel tank purging
The EVAP purge valve is only actuated by the PCM
if the coolant temperature is at least 60°C.
Actuation is done ground side by means of a PWM
signal. This makes it possible to have the full range
of opening widths, from fully closed to fully open.
The PCM determines from the operating conditions
when and how wide to open the EVAP tank purge
valve. If the EVAP purge valve is opened, the
engine sucks in ambient air through the activated
charcoal in the evaporative emission canister as
a result of the vacuum in the intake manifold. In
this way the adsorbed hydrocarbons are led to the
combustion chamber of the engine.
The EVAP tank purge valve is not actuated and
system cleaning is interrupted if the engine
switches to idle and/or a closed-loop control
process is initiated.
Power (battery voltage) is supplied via the
Powertrain Control Module relay in the BJB. The
solenoid coil resistance is between 17 and 24 ohms
at 20°C.
Engine speed control
The APP sensor provides the PCM with information
about the driver's request for acceleration.
The throttle control unit receives a corresponding
input signal from the PCM. An electric motor then
moves the throttle valve shaft by means of a set
of gears. The position of the throttle is continuously
recorded by the TP sensor. Information on throttle
position is processed and monitored by the PCM.
The TP sensor comprises two potentiometers.
These work in opposite ways to each other. In one
potentiometer, the resistance increases when the
throttle is opened, in the other it decreases. Thisallows the operation of the potentiometers to be
checked. The signal from the TP sensor is
amplified in the lower range (idle to a quarter open)
by the PCM to enable more precise control of the
throttle in this range. This is necessary because
the engine is very sensitive to changes in throttle
angle in this throttle opening range.
With the throttle valve position kept constant, the
ignition angle and the injected fuel quantity are
then varied to meet the torque demands.
Depending on the operating state of the engine, a
change in the position of the throttle flap may not
be necessary when the APP sensor changes.
If a fault develops in the throttle control unit, a
standby function is executed. This standby function
allows a slight opening of the throttle flap, so that
enough air passes through to allow limited engine
operation. For this purpose, there is a throttle flap
adjustment screw on the throttle housing. The
return spring closes the throttle flap until the stop
of the toothed segment touches the stop screw. In
this way a defined throttle flap gap is formed for
limp home mode.
The stop screw has a spring loaded pin, which
holds the throttle flap open for limp home mode.
In normal operating mode, this spring loaded pin
is pushed in by the force of the electric motor when
the throttle flap must be closed past the limp home
position (e.g. for idle speed control or overrun
shutoff).
Oil monitoring
The engine does not have an oil pressure
switch.
The oil level and oil quality are calculated.
Calculating the engine oil level
The oil level is determined by continuous
measurement of the capacitance (i.e. the ability to
store an electrical charge) between the two
capacitive elements of the engine oil
level/temperature/quality sensor. The different oil
levels cause the capacitance between the elements
to change. The data are recorded by the PCM and
converted into an oil level value. Temporary
fluctuations in oil level are automatically filtered out
by the PCM.
Calculating oil quality
The PCM calculates the oil quality from the oil level
measurement and the oil temperature measured
by the sensor, plus the engine speed and the
average fuel consumption. The driver is informed
about when an oil change is due.
G1021908en2008.50 Kuga8/2011
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