2011 FORD KUGA CAN BUS

Description
Item
Medium speed CAN data bus (MS-CAN)
1
DLC
2
GEM
Comments:Serves as a gateway between the two
CAN databus systems.
3
High speed CAN data bus (HS-CAN)
4
PCMRefertoComponentDescription:(page
8)
5
LIN (local interconnect network) databus
6
Alternator
7
Heating element - broadband HO2S
8
Catalyst monitor sensor heating element
9
Powertrain Control Module relay
10
Starter Relay
11
FPDM
Comments:Refer to: Fuel Tank and Lines - 2.5L
Duratec (147kW/200PS) - VI5 (310-01
Fuel Tank and Lines, Description and
Operation).
12
Fuel pump
13
injectorsRefertoComponentDescription:(page
?)
Comments: 5x
14Description
Item
Air conditioning clutch relay
Comments:Refer to: Climate Control (412-01
Climate Control, Description and
Operation).
15
EVAP valve
Comments:
16
VCT oil control solenoid, exhaust camshaftRefer to Component Description:
solenoids(page26)
17
VCT oil control solenoid, intake camshaftRefer to Component Description:
solenoids(page26)
18
Cooling fan module
Comments:Refer to: Engine Cooling - 2.5L Duratec
(147kW/200PS) - VI5 (303-03 Engine
Cooling, Description and Operation).
19
Wastegate control valve
Comments:Refer to: Turbocharger (303-04 Fuel
Charging and Controls - Turbocharger
- 2.5L Duratec (147kW/200PS) - VI5,
Description and Operation).
20
Ignition coil-on-plugRefertoComponentDescription:(page
10)
Comments: 5x
21
Throttle control unitRefertoComponentDescription:(page
30)
Comments: Actuator motor unit
22
System Operation
The engine is controlled by the PCM. For this
purpose, the PCM uses information from the
sensors, sender units and switches. In addition,
the PCM receives information from other control
modules via the CAN data bus. All the information
is processed in the PCM and is used to control or
regulate the different actuators.
These are:
• the throttle control unit,
• the fuel injectors, • the camshaft adjustment,
• the boost control solenoid valve
• and the ignition coils.
Some values are sent via the CAN databus to other
systems.
The following functions are regulated or controlled
by the PCM:
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• Starting process
• Engine running– Fuel supply to the engine including lambdacontrol
– Ignition setting including knock control
– Idle speed control
– Boost pressure control
– Valve timing via the camshaft adjuster for the intake and exhaust camshafts (including
internal exhaust gas recirculation)
• Refrigerant compressor (activation, deactivation and delivery)
• EVAP purge valve
• Charging system
Fuel is supplied to the engine via a sequential
multi-point injection system. Ignition is performed
by a distributor-less ignition system with one
ignition coil unit for each cylinder.
The PCM optimizes engine power and emissions
at all times by processing the sensor signals and
information received via the CAN databus and
using these for open or closed loop control of the
different variables.
The PCM contains part of the PATS (passive
anti-theft system).
The PCM is supplied with battery voltage via a fuse
in the BJB (battery junction box). This power supply
is needed to ensure that saved data is not lost
when the engine is switched off.
For other power supply requirements, the PCM
switches on a relay in the BJB which is responsible
for supplying power to the PCM and to some
sensors and actuators. Each of these are protected
by fuses in the BJB.
To guarantee optimum engine running at all times,
the PCM has several adaptive (self-learning)
functions. These adapt the output signals to
changing circumstances, such as wear or system
faults.
In some cases a faulty signal is replaced with a
substitute value or limited. A substitute value can
be calculated from other signals or it can be
predefined by the PCM. The substitute value allows
the vehicle to keep on running without the emission
values changing unduly. Depending on the signal
failure, the PCM operates in emergency mode. In
this mode, the engine power and/or the engine
speed is reduced to prevent further damage.
Depending on the faulty signal, a fault code is
stored in the error memory of the PCM. These can be read out using IDS (Integrated Diagnostic
System) via the DLC.
The PCM processes and evaluates the signals
from the sensors. The following sensors send
signals to the PCM:
• CMP sensors
• CKP sensor
• MAF sensor
•KS
• ECT sensor
• TP sensor
• APP sensor
• Broadband HO2S
• Catalyst monitor sensor
• MAPT sensor
• Air conditioning (A/C) pressure sensor
• Alternator
• Fuel temperature and fuel pressure sensor
• Engine oil level, temperature and quality sensor
• Outside air temperature sensor
The following components receive signals from the
PCM:
• Powertrain Control Module relay
• A/C clutch relay
• injectors
• Direct ignition coils
• Cooling fan module
• Throttle control unit
• Camshaft adjuster solenoid valve
• Starter Relay
• EVAP purge valve
• Alternator
• Heating element - broadband HO2S
• Catalyst monitor sensor heating element
• FPDM
• Wastegate control valve
• Air conditioning compressor
The PCM receives the following signals via the
CAN databus:
• APP
•CPP
• BPP
• Vehicle speed.
• Refrigerant compressor request
• PAT S
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• Torque reduction request (stability assistmodule)
• Cruise control request
The PCM sends the following signals via the CAN
databus:
• Fuel pump relay on/off
• Engine speed
• Warning lights on/off (MIL (malfunction indicator lamp), battery warning lamp)
• PAT S
•ECT
• Air conditioning pressure transducer
• Outside air temperature
With the aid of the input and output signals listed
above, the PCM controls / regulates engine
starting, fuel injection and fuel pressure, ignition,
boost pressure, camshaft adjustment, tank purging,
the radiator fan and the refrigerant compressor.
Speed and TDC recording
The CKP uses the PCM sensor to record engine
speed and detect 1st cylinder TDC (top dead
center). An additional sensor wheel for the CKP sensor is
located on the flywheel. This has 60-2 teeth. The
gaps between the teeth are required for detection
of TDC. The CKP sensor works according to the
induction principle and generates a sinusoidal
signal voltage whose level and frequency are
speed-dependent.
From the frequency of the signal the PCM
calculates the engine speed. Each time the engine
rotates, the double gap in the sensor wheel alters
the sinusoidal oscillation that is generated; this
helps the PCM to detect the TDC position of
cylinder 1.
The signal from the CKP sensor is used to
determine
• the crankshaft position,
• the engine speed,
• the ignition timing,
• the injection timing and
• the adjustment angle of the VVT units.
2
3
4
1
9
7
8
6
5
2
3
4
1
9
7
8
6
5
E96631
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than to a change in the throttle valve position. The
ignition timing also changes much more quickly.
To keep the ignition point as close as possible to
the knock limit and so optimize the efficiency of the
engine, two KS are installed in the engine, which
pick up the mechanical vibrations of the engine
and convert them into an electrical signal for the
PCM.
TIE42093
1
2
A
B1
2
Description
Item
Normal combustion
A
Knocking combustion
B
Pressure characteristic in cylinder
1
Output signal from KS
2
The term "knocking" is used to describe
combustion processes in which the flame front
propagation speed reaches the speed of sound.
This can happen towards the end of combustion
in particular, when unburnt air/fuel mixture on the
combustion chamber walls self-ignites due to the
increase in pressure following initiation of regular
combustion. The resulting pressure peaks damage
the pistons, cylinder head gasket and cylinder
head.
The cylinder in which combustion knock is
occurring is identified from the camshaft position (CMP sensors) and crankshaft position (CKP
sensor) information.
If the PCM detects combustion knock, the ignition
timing for the cylinder in question is gradually
retarded for a few crankshaft revolutions until
combustion knock stops. After that the ignition point
is slowly returned to the calculated value. This
facilitates individual cylinder ignition, which makes
it possible for the engine to operate at optimum
efficiency at the knock limit.
Engine fueling
Fuel is supplied by a non-return fuel system.
Fuel pressure and fuel delivery rate are regulated
by the PCM with the aid of the FPDM. The fuel
pump is supplied with a cycled voltage by the
FPDM. By cycling the voltage, the fuel pump output
can be steplessly adjusted. The fuel pressure can
be steplessly regulated between 3 and 5 bar.
Adjusting the fuel pump output has the following
advantages:
• The fuel pump's power consumption is reduced,
thereby reducing the load on the vehicle's power
supply system.
• The fuel pump's service life is increased.
• Fuel pump noise is reduced.
Fuel pressure regulator
The PCM calculates the required fuel pressure
based on the operating conditions. The PCM
transmits a corresponding PWM signal to the
FPDM. With the aid of this signal, the FPDM
actuates the pump by sending, in turn, a PWM
signal to the ground connection of the fuel pump.
The fuel pump can be steplessly regulated by
varying the pulse width of the PWM signal.
The PCM continuously monitors the fuel pressure
in the fuel rail by means of the fuel temperature/fuel
pressure sensor. If the pressure deviates from the
calculated value, the PCM adapts the PWM signal
to the FPDM accordingly. Thus the fuel pressure
levels out at approx. 4 bar.
For safety reasons, the PCM switches off fuel
delivery if the SRS (supplemental restraint system)
module detects a crash.
Regulation of injected fuel quantity
The electromagnetically controlled injectors dose
and atomize the fuel. The quantity of injected fuel
is regulated by the duration of actuation of the fuel
injectors. The fuel injectors are either closed (not
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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.
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KS
E96327
23
5
4
1
Description
Item
Seismic mass
1
Piezoceramic
2
Housing
3
Piezoceramic contact
4
Electrical connection
5
The KS converts mechanical vibrations of the
cylinder block into electrical pulses which can then
be processed by the PCM.
The KS consists of piezo-ceramic crystals that
generate a voltage when subjected to a mechanical
load.
When fastening the KS, make sure the specified
torque is adhered to. In this way a defined initial
tension is applied to the crystals which exerts an
influence on the operation of the KS.
When the engine is running, the pressure
fluctuations arising due to the combustion process
cause vibrations in the cylinder block. These act
on the crystals in the KS, causing the sensors to
produce an output signal. The stronger the
vibrations, the higher the frequency and the AC
voltage. These signals are evaluated by the PCM
and compared with stored data.
TIE42093
1
2
A
B1
2
Description
Item
Normal combustion
A
Knocking combustion
B
Pressure characteristic in cylinder
1
Output signal from KS
2
Broadband HO2S
TIE42061
The planar broadband HO2S also allows
measurements of the exhaust gas which deviates
from the stoichiometric ratio (lambda = 1). The
measuring range extends from lambda 0.7 to 2.8,
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Description
Item
Amperes
A
Volts
V
Valve rotor
1
Electronics
2
Primary coil
3
Secondary coil
4Description
Item
Analog alternating current
5
Generated PWM signal.
6
PCM
Comments:PWM signal is converted in the GEM
and forwarded via the CAN data bus.
7
The APP sensor is a double contactless inductive
sensor. The APP sensor is integrated with the
accelerator pedal in the accelerator pedal module.
The inductive sensor essentially works in a similar
way to a transformer. The incoming DC voltage
first has to be converted into AC voltage.
Depressing the accelerator pedal moves a rotor.
This induces the AC voltage from the primary coil
into the secondary coil. The strength of the
induction depends on the position of the rotor:
• no accelerator-pedal actuation: low induction, i.e. low amplitude of the AC voltage,
• full accelerator-pedal actuation: high induction, i.e., high amplitude of the AC voltage.
To allow the PCM to process the AC voltage signal
output by the secondary coil, the signal must first
be converted into a PWM signal in the sensor
electronics.
In the APP sensor the signals are split as follows:
– APP 1 = PWM signal to the GEM and from there via the CAN data bus to the PCM.
– APP 2 = the analogue DC (direct current) signal is sent directly to the PCM.
Both signals are monitored by the PCM for
plausibility.
CPP sensor
E70695
The sensor works on the Hall-effect principle and
records the position of the piston in the master
cylinder without contact. The permanent magnet
required for recording the position is located in the
piston of the clutch master cylinder.
The signal from the CPP sensor is recorded by the
GEM and transmitted to the CAN via the PCM bus.
BPP switches
E94800
The BPP switch is designed as normally-closed
contact. In its rest state the switch is closed and
sends an earth signal to the GEM.
The brake light switch is designed as
normally-open contact and is open in its rest state.
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E125524
Description
Item
Electronic Control System
A
Hydraulic Control System
BDescription
Item
Select-shift switch module
1
CAN (controller area network) bus input
signals
2
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Automatic Transmission/Transaxle
— Vehicles With:
5-Speed Automatic Transaxle - AW55 AWD
307-01- 23
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