2011 FORD KUGA change pcm

select-shift switch module transmits a downshift
signal to the TCM.
If you move the gear selector lever backwards (+),
an upshift signal is transmitted to the TCM. In the
instrument cluster, the symbol when the selector
lever is in the 'S' position changes from 'D' to the
current gear, for example 3.
The TCM transmits a signal to the select-shift
switch module to switch on the light emitting diode
for 'S' and to switch off all other light emitting
diodes. The TCM decides whether the shift process
is possible.
If the shift process is permitted, then the various
valves are activated according to the intended
combination for each gear.
In certain situations however, the TCM determines
the gear shifting. The following applies:
• If the vehicle is stationary, only 1st, 2nd and 3rdgears can be selected. 4th gear can be selected
at speeds over 30 km/h and 5th gear at speeds
over 40 km/h.
• The kickdown function is only available in the automatic transmission range 'D'
• Automatic gear changes into the next higher or next lower gear occur at fixed vehicle speeds
and fixed engine speeds
• The permitted engine speed for manual change down agree with that for the kickdown change
up, i.e. an engine speed of approximately 6000
rpm.
• If the temperature inside the transmission rises too high, the TCM takes control of the shift
decisions in order to select a gear in which
activation of torque converter lockup at the
current speed is possible
• Torque converter lockup is possible in 3rd, 4th and 5th gear. (1st and 2nd gears do not have
torque converter lockup)
The signal that specifies the position of the lever
to the select-shift switch module is generated as
follows in the selector lever position 'S': there is a
Hall sensor at the printed circuit board for the
module for each of the three selector lever
positions. A permanent magnet on the cover in the
selector lever affects the output signals to the
control module from the sensors. The control
module recognizes the position of the lever by the
differences in the signal properties.Selector lever from 'N' to 'R' position
The TCM only permits shifting to reverse gear if
the vehicle speed is less than 4.35 mph.
If the vehicle speed is greater than 7 km/h (approx.
4.35 mph), the clutch (C2) and the multi-plate brake
(B3) are not activated and the gearshift is thus
prevented.
Self-test and Diagnosis
The TCM monitors all the transaxle sensors and
electronic components including the PCM. If a fault
occurs, the driver is informed via a warning
indicator and a text message in the instrument
cluster. Faults are stored as DTCs in the fault
memory of the TCM and can be read out and
cleared using the IDS.
Temperature controlled torque converter
lockup
If heavy load and high ambient temperatures cause
an abnormal rise in the transmission temperature,
torque converter lockup is activated as often as
possible (temperature controlled lockup).
This reduces the slip and the heat developed in
the transmission. When the temperature drops
below +20 °C, torque converter lockup is not used.
Slip locking
When changing gear this function makes it possible
for the gears to engage more smoothly with
reduced vibration and less noise. In this mode, the
torque converter clutch is activated but not fully
locked.
The following conditions must be met for the
function to activate:
• Gear selector lever in position D or S.
• Gear 3, 4 or 5.
• The transmission input speed is 1100 rpm or more and the throttle plate opening 20 - 35%.
• The transmission fluid temperature is 40 - 120 °C.
Hill climbing
The TCM can change the shift pattern slightly when
driving uphill to avoid changing gear too often.
G1163605en2008.50 Kuga8/2011
307-01- 30
Automatic Transmission/Transaxle
— Vehicles With:
5-Speed Automatic Transaxle - AW55 AWD
307-01- 30
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The TCM detects uphill driving by comparing the
engine load transmitted by the PCM with the engine
speed. If the engine load increases and the engine
speed falls, then the TCM causes the transaxle to
shift to a lower transmission range in order to
increase the traction force.
Downhill driving
The TCM detects downhill driving by comparing
the engine load and engine speed values
transmitted by the PCM with the OSS sensor
signal. In order to prevent overloading of the
vehicle brakes, the TCM causes the transaxle to
shift to a lower transmission range.
Hill-hold function
If the vehicle is stopped on an uphill incline, the
TCM detects this through the faster drop in engine
speed compared with the drop in engine speed
when stopping on the flat. In this situation, the
hydraulics are actuated by the TCM in such a way
that the vehicle is prevented from rolling back. This
function is not used on steep inclines.
If the vehicle is parked on an uphill incline (ignition
switched off), the hill-hold function is not active
when pulling away.
Altitude correction
Lower air density results in reduced engine
performance. In order to compensate for this
operating situation, the TCM changes the shift
points.
Selector lever lock
To prevent the selector lever being accidentally
moved from the P or N position, the vehicle also
has an electrically operated selector lever lock.
This blocks the locking pin in the locking segment
and thus locks the selector lever in the P or N
position.
Shifting from P into another transmission
range
To be able to move the selector lever from P into
another transmission range, the ignition must be
switched on and the brake pedal must be
depressed (stop light switch on). The TCM detects
the position of the brake pedal via the CAN data
bus and the engaged transmission range from the
TR sensor.
The signal is then transferred from the TCM to the
select-shift switch module in order to activate the
solenoid valve in the selector mechanism
assembly.
In position P, the solenoid valve is activated and
the locking pin is pulled in so that the lock button
on the selector lever can be pressed as usual to
engage another transmission range.
In the selector mechanism assembly there is a Hall
sensor which is affected by a permanent magnet
on the gate of the selector mechanism assembly.
If the selector lever is moved from the P position,
both the Hall sensor and the selector lever lock
solenoid are simultaneously deactivated, to prevent
the selector from being kept in the N position.
If the ignition is set to "I" or "0" the solenoid valve
is deactivated. When the selector lever is in the P
position, it is mechanically locked because it has
no voltage.
Shifting from N into another transmission
range
The conditions are the same as for shifting from P
into another transmission range.
However, the lock button on the selector lever must
be pressed to be able to select R or P.
Power flow through the transmission
Clutches and brakes
G1163605en2008.50 Kuga8/2011
307-01-31
Automatic Transmission/Transaxle
— Vehicles With:
5-Speed Automatic Transaxle - AW55 AWD
307-01- 31
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Description
Item
ABS5
Cruise control
6
Select-shift switch module
7
PCM
8
Selector lever lock
9
PWM solenoid valve – shift pressure (SLS)
10
PWM solenoid valve for main line pressure
(SLT)
11
PWM- solenoid valve – TCC (SLU)
12Description
Item
Shift solenoid S1 (open when dormant)
13
Shift solenoid S2 (closed when dormant)
14
Shift solenoid S3 (closed when dormant)
15
Shift solenoid S4 (open when dormant)
16
Shift solenoid S5 (closed when dormant)
17
The TSS sensor
18
The OSS sensor
19
The TFT sensor
20
TR sensor in TCM
21
Input signals
Hard wired
• Item 18: ISS (input shaft speed) sensor
– Supplies information on the transmissioninput shaft speed. Used for calculations, for
instance the shift process, checking the
torque converter lockup and for diagnosis of
the hydraulic/mechanical operations in the
transmission.
• Item 19: OSS sensor – Supplies information on the transmissionoutput shaft speed. Used for calculations, for
instance the vehicle speed and for diagnosis
of the hydraulic/mechanical operations in the
transmission.
• Item 20: TFT sensor – Supplies information on the transmission fluidtemperature. This information is used to
adjust the shift times and the fluid pressure.
• Item 21: TR sensor – Supplies the TCM with the information on thechosen transmission range. Starting is only
possible when the selector lever is in the P
or N position. The sensor is a permanent
magnet which creates a magnetic field over
the different Hall sensors and in this way
creates a specific voltage for each shift
operation.
Via the LIN data bus
• Item 7: Selector lever module (select-shift module)
– Indicates that the selector lever is locked inposition P and supplies information on the
sport mode status. Also transmits a control
signal during select-shift gear changes and
supplies information on the fault status in the selector lever module, so that the fault codes
in the module can be stored as required.
Via the CAN data bus
• Item 4: PCM – Stop light switch ON/OFF, is used by theTCC.
– Coolant temperature, used for diagnosis of the transmission temperature sensor and for
activating the catalytic converter.
– Engine speed >400 rpm = engine running. Used for starting the transmission fluid
pressure and diagnosis functions.
– Engine rpm. Used for checking the torque converter slip and the pressure build-up,
which have an effect on the shift comfort.
– Kickdown. If the accelerator pedal is pressed down and the throttle plate is wide open, the
PCM transmits a kickdown signal to the TCM.
– Current engine speed, used to check the line pressure of the transmission.
– Throttle plate opening, used to calculate the gear changes. During sport mode and
kickdown.
– Accelerator pedal position, used to calculate the shift threshold timings.
• Item 5: ABS module – Supplies information on the vehicle speedand also on the difference in speed between
the left-hand and right-hand wheels. Prevents
changing up if the speed difference is greater
than 40 km/h, to protect the differential in the
transmission.
• Item 6: Vehicle speed control system – Is used to calculate the acceleration,depending on the position of the resume and
set buttons.
G1163605en2008.50 Kuga8/2011
307-01- 44
Automatic Transmission/Transaxle
— Vehicles With:
5-Speed Automatic Transaxle - AW55 AWD
307-01- 44
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Output signals
Hard wired
• Item 8: PCM– Start inhibitor. Supplies the PCM with a signalthat indicates whether the engine can be
started or not.
• Item 9: Selector lever module (select-shift module)
– Controls the solenoid switch in the selectorlever unit.
• Position 10: PWM solenoid valve – shift pressure (SLS)
– Matches the line pressure to a shift pressureand is activated for certain gears.
• Position 11: PWM solenoid valve – main line pressure (SLT)
– Adjusts the linear line pressure for gearchanges without jolts.
• Position 12: PWM- solenoid valve – TCC (SLU) – Matches the line pressure to a torqueconverter lock-up pressure. Is also used for
certain gearshifts.
• Items 13 - 17: Shift solenoids S1 – S5 – The TCM checks which gear is engaged asthe solenoids become active in different
patterns.
Via the LIN data bus
• Item 7: Selector lever module (select-shift module)
– The TCM transmits a signal to the selectorlever module which activates the LED (light
emitting diode) in the selector mechanism
assembly according to the selector lever
position. Via the CAN data bus
• Item 2: GEM
– The selector lever module transmits a signalvia the TCM, which indicates that the selector
lever is locked in position P. The GEM uses
this information to control the ignition switch
key inhibit function.
– The TCM transmits a signal via the GEM to activate the back-up lamps.
• Item 3: Instrument Cluster – Current selector lever position. Used toindicate the selector lever position in the
instrument cluster.
– Check the warning lamps via the GEM. In the event of a fault, the general warning lamp
lights.
– Text messages in the instrument cluster via the GEM. The driver receives various
malfunction messages from the TCM.
– The TCM transmits signals on the CAN data bus to the PCM so that the MIL lights up in
the event of emissions-related faults.
• Item 4: PCM – Transmission fluid temperature, used tocompensate for increased loads at low fluid
temperatures.
– Gear selected, used by the engine so that it can compensate for different loads.
– Torque converter lockup, used by the engine so that it can compensate for different loads.
– Next gear planned by the TCM, used by the engine to compensate for different loads.
– Requirement for a reduced engine torque during gear shifts, the engine reduces the
engine torque during gear shifts.
– Torque limiting requirement, the engine limits the engine torque according to the gear
engaged.
• Item 5: ABS module – Current gear, used to transmit a signal, notfor shift control.
– Vehicle speed, used as reserve.
Control valve assembly
G1163605en2008.50 Kuga8/2011
307-01- 45
Automatic Transmission/Transaxle
— Vehicles With:
5-Speed Automatic Transaxle - AW55 AWD
307-01- 45
DESCRIPTION AND OPERATION
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Description
Item
PCM
8
Throttle body
Comments:Contains the TP (throttle position) sensor
9
The APP (accelerator pedal position)
sensor.
10Description
Item
CPP (clutch pedal position) switch
Comments:Vehicles with manual transaxle.
11
BPP (brake pedal position) switch
12
Reverse gear solenoid
Comments:Vehicles with manual transaxle.
13
System Operation
Speed Control
Cruise control is integrated into PCM and
intervenes in engine management to automatically
keep to the target speed selected by the driver.
When the system is active, the vehicle can be
accelerated or decelerated without the accelerator
pedal being pressed. Cruise control is operated
using the control switch units on the steering wheel.
The PCM controls the throttle to achieve this. The
ABS module supplies the VSS signal for this.
On vehicles with automatic transmission, the TCM
receives a notification via the CAN (controller area
network) bus that cruise control is active. The TCM
then controls the transmission based on special
engine maps.
Cruise control recognizes three operating modes:
• "OFF": Control is switched off.
• "STANDBY": Control is switched on but not
active. The speed of the vehicle is not regulated
by the cruise control.
• "ACTIVE": Control is switched on and active. Cruise control adjusts the vehicle speed to the
stored or desired target speed.
Every time the engine is started, cruise control is
in the "OFF" mode. In this mode, only the "ON"
button is operable.
Cruise control is initially set to "STANDBY" mode
when the "ON" button is pressed. The green cruise
control indicator lamp in the instrument cluster
lights up. There is no target speed saved.
Cruise control can only be set to "STANDBY" mode
under the following conditions:
• Engine speed is between idle speed and maximum permissible speed. Cruise control can only be changed into "ACTIVE"
mode under the following conditions:
• 2nd - 6th gear engaged.
• Engine speed between idle speed and maximum
permissible speed.
• Vehicle speed at least 40 km/h.
Pressing the "SET+" or "SET-" button activates
cruise control ("ACTIVE" mode). The green "Cruise
control" indicator lamp in the instrument cluster
lights up. The current vehicle speed is saved as
the target.
In "ACTIVE" mode the "OFF", "SET+", "SET-" and
"RES" buttons are active. If the "RES" button is
pressed again, control is suspended. The "RES"
button has a dual function and is used to resume
and suspend the cruise control.
Tapping the "SET+" button (for less than 640 ms)
increases the target speed by 1 km/h at a time.
Holding down the "SET+" button (for longer than
640 ms) increases the target speed until the button
is released. If the button is not released, cruise
control accelerates the vehicle up to the maximum
permissible vehicle speed (200 km/h) or up to the
vehicle's maximum speed (whichever speed is
lower). Tapping the "SET-" button (for less than
640 ms) reduces the target speed by 1 km/h at a
time. When the the "SET-" button is held down, the
control reduces the target speed until the button is
released. If the "SET-" button is held down until
the minimum speed of 40 km/h is reached, cruise
control switches to "STANDBY" mode.
Cruise control is put into "STANDBY" mode when
the "RES" button is pressed. Control to the stored
target speed can be started again by pressing the
"RES" button again. If the "SET+" or "SET-" button
is pressed while the "RES" function is being
performed (control to saved target speed), cruise
G1044191en2008.50 Kuga8/2011
310-03- 4
Speed Control
310-03- 4
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