Maf FORD KUGA 2011 1.G Workshop Manual

Intake Air Distribution and Filtering – Component Location
E105576
1
2
34
5
6
7
8
9
Description
Item
Intake manifold
1
Air cleaner
2
The MAF (mass air flow) sensor
3
Pipe, air filter to turbocharger
4Description
Item
Turbocharger
5
Pipe, turbocharger to intercooler
6
Charge air cooler
7
Pipe, intercooler to intake manifold
8
Air Intake manifold
9
G1079094en2008.50 Kuga8/2011
303-12- 2
Intake Air Distribution and Filtering
— 2.5L Duratec
(147kW/200PS) - VI5
303-12- 2
DESCRIPTION AND OPERATION
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Intake Air Distribution and Filtering
Inspection and Verification
1. Verify the customer concern.
2. Visually inspect for obvious signs of mechanicalor electrical damage.
Visual Inspection Chart
Electrical
Mechanical
– Mass air flow (MAF)sensor
– Manifold absolute pressure (MAP)
sensor
– Electrical connector(s)
– Air cleaner element
– Air cleaner intake
pipe
– Air cleaner outlet pipe
– Charge air cooler
– Charge air cooler intake pipe
– Charge air cooler outlet pipe 3. If an obvious cause for an observed or reported
concern is found, correct the cause (if possible)
before proceeding to the next step.
4. If the cause is not visually evident, verify the symptom and refer to the Symptom Chart.
Symptom Chart
Action
Possible Sources
Symptom
• CHECK the pipe(s) for securityand leaks to atmosphere.
INSTALL new intake air
components as necessary.
TEST the system for normal
operation.
• Detached air cleaner pipe(s).
• Detached turbocharger pipe(s).
• Detached charge air cooler
pipe(s).
• Excessive intake air noise
• REFER to:Engine Emission
Control (303-08 Engine
Emission Control - 2.5L
Duratec (147kW/200PS) -
VI5, Diagnosis and Testing).
• Blocked or damaged PCV
pipe(s)/hose(s).
• Blocked or damaged crankcase vent oil separator.
• Oil in the air intake system
• REFER to:Turbocharger(303-
04 Fuel Charging and
Controls - Turbocharger -
2.5L Duratec (147kW/200PS)
- VI5, Diagnosis and Testing).
• Turbocharger.
• CHECK the air intake pipesplash shield for correct install-
ation and alignment.
REPAIR/INSTALL the air intake
pipe splash shield as neces-
sary. TEST the system for
normal operation.
• Air intake pipe splash shield.
• Water in the air cleaner
G1183447en2008.50 Kuga8/2011
303-12- 4
Intake Air Distribution and Filtering
— 2.5L Duratec
(147kW/200PS) - VI5
303-12- 4
DIAGNOSIS AND TESTING
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SECTION 303-14 Electronic Engine Controls— 2.5L Duratec
(147kW/200PS) - VI5
VEHICLE APPLICATION: 2008.50 Kuga
PA G E
CONTENTS
DESCRIPTION AND OPERATION
303-14-3
Electronic Engine Controls (Component Location) .............................................................
303-14-7
Electronic Engine Controls (Overview) ........................................................................\
.......
303-14-7
General overview ........................................................................\
........................................
303-14-8
Powertrain Control Module (PCM) ........................................................................\
..............
303-14-8
Knock Sensor ........................................................................\
.............................................
303-14-8
Camshaft Position (CMP) Sensor ........................................................................\
...............
303-14-9
Crankshaft Position (CKP) sensor ........................................................................\
..............
303-14-9
Camshaft adjuster solenoid valve........................................................................\
...............
303-14-9
Manifold absolute pressure and temperature sensor .........................................................
303-14-9
Accelerator pedal position (APP) sensor ........................................................................\
....
303-14-10
Throttle control unit ........................................................................\
.....................................
303-14-10
Engine Coolant Temperature (ECT) sensor.......................................................................
303-14-10
Ignition coil-on-plug ........................................................................\
....................................
303-14-12
Electronic Engine Controls (System Operation and Component Description) ...................
303-14-12
System Diagram ........................................................................\
.........................................
303-14-16
System Operation ........................................................................\
.......................................
303-14-18
Speed and TDC recording ........................................................................\
......................
303-14-19
Calculation of the ignition angle ........................................................................\
..............
303-14-20
Engine fueling ........................................................................\
.........................................
303-14-22
Engine speed control ........................................................................\
..............................
303-14-22
Oil monitoring ........................................................................\
..........................................
303-14-23
Calculation of valve timing adjustment angle..................................................................
303-14-23
Boost pressure control ........................................................................\
............................
303-14-24
Starting process ........................................................................\
......................................
303-14-24
Alternator control (Smart Charge) ........................................................................\
...........
303-14-24
Component Description ........................................................................\
..............................
303-14-24

CKP sensor ........................................................................\
.............................................
303-14-25

Broadband HO2S ........................................................................\
...................................
303-14-26

VCT (variable camshaft timing) solenoids ......................................................................
303-14-27

MAF sensor ........................................................................\
.............................................
303-14-28

APP sensor ........................................................................\
.............................................
303-14-29

CPP sensor ........................................................................\
.............................................
303-14-29

BPP switches ........................................................................\
..........................................
303-14-30

Air conditioning (A/C) pressure sensor ........................................................................\
...
303-14-30

Throttle
control unit ........................................................................\
.................................
303-14-31

ECT sensor ........................................................................\
.............................................
303-14-31

Cooling fan module ........................................................................\
.................................
303-14-32

injectors........................................................................\
...................................................
303-14-32

Ignition coil-on-plug ........................................................................\
.................................
303-14-33

Fuel pressure/fuel temperature sensor ........................................................................\
...
303-14-33

Wastegate control valve ........................................................................\
..........................
303-14-34

Engine oil level, temperature and quality sensor ............................................................
303-14-1
Electronic Engine Controls— 2.5L Duratec (147kW/200PS) - VI5303-14-
1
.
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303-14-34
Exterior aor temperature sensor ........................................................................\
.............
DIAGNOSIS AND TESTING 303-14-35
Electronic Engine Controls ........................................................................\
.........................
303-14-35
Inspection and Verification ........................................................................\
..........................
REMOVAL AND INSTALLATION 303-14-36
(29 232 0)
Camshaft Position (CMP) Sensor ...................................................................
303-14-37
(29 219 0)
Catalyst Monitor Sensor ........................................................................\
.........
303-14-38
(29 230 0)
Crankshaft Position (CKP) Sensor .................................................................
303-14-40
(29 220 0)
Heated Oxygen Sensor (HO2S) .....................................................................
303-14-41
(29 222 0)
Knock Sensor (KS) ........................................................................\
.................
303-14-42
(29 226 0)
Mass Air Flow (MAF) Sensor ........................................................................\
..
303-14-43
(29 200 0)
Powertrain Control Module (PCM) .................................................................
303-14-45
(29 233 0)
Variable Valve Timing (VVT) Oil Control Solenoid ..........................................
303-14-46
(33 502 0)
Brake Pedal Position (BPP) Switch ................................................................
303-14-47
(33 503 0)
Clutch Pedal Position (CPP) Switch ...............................................................
303-14-2
Electronic Engine Controls— 2.5L Duratec (147kW/200PS) - VI5303-14-
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Description
Item
CMP (camshaft position) sensor
Comments:One each for the inlet and outlet
camshaft
6
EVAP (evaporative emission) valve
7
CKP (crankshaft position) sensor
8Description
Item
MAF (mass air flow) sensor
9
PCM (powertrain control module)
10
Fan control module
11
MAPT (manifold absolute pressure and
temperature) sensor
12
E96950
1
23
4
56
G1021906en2008.50 Kuga8/2011
303-14-
4
Electronic Engine Controls— 2.5L Duratec (147kW/200PS) - VI5303-14-
4
DESCRIPTION AND OPERATION
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Description
Item
Medium speed CAN data bus (MS-CAN)
1
DLC (data link connector)
2
GEM (generic electronic module)
Comments:Serves as a gateway between the two
CAN databus systems.
3
High speed CAN data bus (HS-CAN)
4
CPP (clutch pedal position) sensorRefertoComponentDescription:(page
29)
5
BPP switchesRefertoComponentDescription:(page
29)
6
MAF sensorRefertoComponentDescription:(page
27)
7
TP sensorRefer to Component Description: Throttle
controlunit(page33)
Comments: It is incorporated into the throttle control
unit
8
ECT sensorRefertoComponentDescription:(page
31)
9
CKP sensorRefertoComponentDescription:(page
24)
10
CMP sensor - intake camshaftRefertoComponentDescription:(page
8)
11
CMP sensor - exhaust camshaftRefertoComponentDescription:(page
8)
12Description
Item
Broadband HO2SRefertoComponentDescription:(page
25)
13
Catalyst monitor sensor
14
Air conditioning (A/C) pressure sensorRefertoComponentDescription:(page
30)
15
KSRefertoComponentDescription:(page
8)
16
APP sensorRefertoComponentDescription:(page
28)
17
MAPT sensorRefertoComponentDescription:(page
9)
18
Fuel pressure/fuel temperature sensorRefertoComponentDescription:(page
33)
19
Exterior aor temperature sensorRefertoComponentDescription:(page
34)
20
Engine oil level, temperature and quality
sensorRefertoComponentDescription:(page
34)
21
Ignition switch
22
Battery
23
PCMRefertoComponentDescription:(page
8)
24
G1021908en2008.50 Kuga8/2011
303-14-
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14
DESCRIPTION AND OPERATION
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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
G1021908en2008.50 Kuga8/2011
303-14-
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DESCRIPTION AND OPERATION
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Description
Item
CKP sensor
1
Tooth pitch
2
Flywheel ring gear
3
Reference mark
4
Voltage (sinusoidal-like signal curve)
5Description
Item
60-2 pulses per revolution of the
crankshaft
6
Tooth center
7
Reference mark
8
Tooth pitch
9
The acceleration of the flywheel at each power
stroke results in a change in the CKP signal.
During the power stroke, the combustion pressure
acting on the piston causes an acceleration of the
crankshaft and thus also of the flywheel. This is
apparent in the voltage curve from slightly higher
frequencies and amplitudes of the CKP signal.
Calculation of the ignition angle
Since propagation of the flame front in the air/fuel
mixture always takes the same amount of time, the
ignition of the air/fuel mixture has to take place
earlier or later depending on the engine speed.
The higher the speed, the earlier ignition must
occur. This ensures that maximum combustion
pressure is achieved immediately after Top Dead
Center and that maximum combustion pressure
acts on the piston.
When starting the engine, ignition timing is
determined by the CMP purely from the ignition
map and information on camshaft position (CKP
sensors) and crankshaft position (PCM sensor).
As soon as the engine is running, the following
data are used as a basis for calculating the ignition
angle:
• the engine speed,
• the engine load,
• the coolant temperature and
• the KS signal.
The ignition angle has a major impact on engine
operation. It affects
• engine performance
• exhaust emissions
• fuel consumption,
• combustion knock behavior and
• engine temperature.
The higher the engine load, i.e. the torque demand,
the richer the air/fuel mixture, the longer the
combustion period and the earlier the ignition. The PCM calculates engine load using the MAF
sensor signal, the throttle position and engine
speed. This is done using ignition maps that are
stored in the PCM. The ignition timing is adjusted
according to the operating condition of the engine,
for cold starting for example.
Ignition map
2
E96319
1
3
Description
Item
Engine load.
1
Engine speed
2
Ignition angle
3
The ignition maps were calculated in a series of
tests. Particular attention is paid to the emission
behaviour, power and fuel consumption of the
engine. The ignition map is stored in the data
memory of the PCM.
By adjusting the ignition timing it is also possible
to influence the engine speed to some extent
without having to change the throttle valve position.
This has advantages for idling stabilization, as the
engine speed and hence the engine torque respond
far more quickly to a change in the ignition timing
G1021908en2008.50 Kuga8/2011
303-14- 19
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19
DESCRIPTION AND OPERATION
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E96872
1
2
3
5
4
6
7
8
Description
Item
Electrical connection
1
Solenoid coil
2
Engine oil pressure supply bore and ring
groove for camshaft adjustment unit
chamber A
3
Tappet
4
Engine oil pressure supply bore for
camshaft adjustment solenoid
5
Engine oil pressure supply bore and ring
groove for camshaft adjustment unit
chamber B
6
Spring
7
Engine oil return bore
8
MAF sensor
E58185
1
2
43
565
Description
Item
Housing
1
Housing cover
2
Control electronics
3
Sensor element
4
Sensor measuring cell
5
Heating zone
6
The MAF sensor works on the ‘hot-film principle’.
The MAF sensor is powered via the Powertrain
Control Module relay in the BJB. The MAF sensor
is connected to ground via the PCM.
The MAF sensor sits in a molded part which
protrudes into the center of the air cleaner's outlet
pipe. From this position, it measures the air mass
drawn in by the engine.
The air mass aspirated by the engine is determined
on the basis of the cooling effect of the intake air
via a hot-film element in the MAF sensor. The
greater the aspirated air mass, the greater the
cooling effect and the lower the electrical resistance
of the hot-film element. The electronics in the MAF
sensor process this resistance value and send a
G1021908en2008.50 Kuga8/2011
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DESCRIPTION AND OPERATION
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voltage signal to the PCM corresponding to the
aspirated air mass.
This analogue voltage signal is between 0.5V and
5V. Low mass of intake air produces a low voltage
signal. A high mass of intake air produces a
correspondingly high voltage signal.
The MAF sensor is also capable of detecting the
backflow of the intake air. A sensor element is
heated electrically on the integrated chip and then
cooled by the air flowing through. The regulating
switch supplies the heating current in such a way
that it attains a constant excess temperature in
comparison to the intake air. The mass air flow and
the direction of flow can be derived from this
heating current (given in the form of a signal
voltage). Below a certain voltage value there is a
return flow. The direction is flow is registered by
two sensors pointing in different directions. The
measurement does not require a great deal of
software processing effort, even with a strongly
pulsating mass air flow.MAPT
E96146
The MAPT sensor combines two sensors in one
housing. These are the MAP sensor and the IAT
sensor. They take the form of a piezoelectric
resistor and an NTC resistor.
The MAP sensor receives a reference voltage of
5V from the PCM. The output signal from the MAP
sensor element is an analog voltage signal which
changes proportionately to the prevailing pressure
in the intake manifold.
The IAT sensor records the temperature of the
intake air downstream of the intercooler.
APP sensor
00
E96668
1
2
43
AV
56
7
G1021908en2008.50 Kuga8/2011
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