FORD FIESTA 2007 Workshop Manual

Automatic Transmission/Transaxle -
Vehicles With: 4-Speed Automatic
307-01 -21 Transmission
(AW81-40) 307-01 -21
DESCRIPTION AND OPERATION
Item Description
111lst gear clutch I
I
1 4 1 Small sun gear I
--
I
2
1 9 1 Long planet gear I
From the torque converter
Transmission input shaft
6 8
10 Annulus
and output wheel of the planetary
I lgearset
Planet gear carrier
Short planet gear
I 11 I Intermediate gear stage I
1 12 1 Differential assembly I
The large sun gear (15) is held by the 2nd gear
one-way clutch (14) and the 2nd-4th gear brake
(1 3).
N0TE:ln selector lever position "2" the large sun
gear is also held by the 4th gear brake (1 6) (engine
braking).
The short planet gears (8) are driven by the small
sun gear in the opposite direction of rotation to the
output from the engine.
The short planet gears drive the long planet gears
(9) in the same direction of rotation as the output
from the engine.
The long planet gears are supported by the large
sun gear which is being held, and they drive the
planet gear carrier (6) in the same direction of
rotation as the output from the engine.
The long planet gears drive the ring gear (10) in
the same direction of rotation as the output from
the engine.
The annulus is fixedly connected to the output
wheel of the planetary
gearset and drives the
A
1st-3rd gear clutch (3) to the small sun gear (4).
B
2006.0 Fiesta 1212006 G380528en
direction of rotation to the output from the engine.
Planetary gearset, rear intermediate
gear stage (1 1 ) in the opposite
Drive is transmitted from the torque converter (1 ) assembly (12) in the Same direction of rotation as
to the transmission input shaft (2) and via the the
output from the engine.
Planetary
gearset, front
The intermediate gear stage drives the differential I
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Automatic TransmissionlTransaxle -
Vehicles With: CSpeed Automatic
307-01 -22 Transmission
(AW81-40) 307-01 -22
DESCRIPTION AND OPERATION
Transmission ratio and power flow route
- 3rd gear
2006.0 Fiesta 1212006 G380528en
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Automatic Transmission/Transaxle -
Vehicles With: 4-Speed Automatic
Transmission
(AW81-40)
DESCRIPTION AND OPERATION
1 3 1 I st - 3rd gear clutch I
Item Description
1 4 1 Small sun gear I
1
2
-
1 6 1 Planet gear carrier I
From the torque converter
Transmission input shaft
10 Annulus and output wheel
of the planetary
1 lgearset
I 11 I Intermediate gear stage I
1 12 1 Differential assembly I
)I 2nd - 4th gear brake I
1 14 12nd gear one-way clutch I
1 15 1 Large sun gear I
1 17 1 3rdl4th gear clutch I
I A I Planetary gearset, rear I
I B I Planetary gearset, front I
The drive is transmitted from the torque converter
(I) on the one hand to the transmission input shaft
(2) and via the 1st-3rd gear clutch (3) to the small
sun gear
(4), and on the other hand from the
transmission input shaft via the
3rdl4th gear clutch
(17) to the planet gear carrier (6).
As the drive is transmitted to two components
simultaneously, there are no relative movements
within the planetary
gearset. The planetary gearset
rotates as a complete unit.
N0TE:The 2nd-4th gear brake (1 3) remains
engaged, but the large sun gear
(I 5) can rotate in
the same direction of rotation as the output from
the engine by means of the 2nd gear one-way
clutch
(14), as a result of which the 2nd-4th gear
brake has no influence on the transmission ratio.
The Annulus (1
0) is fixedly connected to the output
wheel of the planetary
gearset and drives the
intermediate gear stage (1 1
) in the opposite
direction of rotation to the output from the engine.
The intermediate gear stage drives the differential
assembly (12) in the same direction of rotation as
the output from the engine.
2006.0 Fiesta 1212006 G380528en
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Automatic TransmissionlTransaxle -
Vehicles With: 4-Speed Automatic
Transmission
(AW81-40)
DESCRIPTION AND OPERATION
Transmission ratio and power flow route
- 4th gear
2006.0 Fiesta lu2006 G380528en
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Automatic Transmission/Transaxle -
Vehicles With: 4-Speed Automatic
307-01 -25 Transmission (AW81-40) 307-01 -25
DESCRIPTION AND OPERATION
Item Descriotion
I 1 I From the torque converter I
~l%ansmission input shaft I
1 4 1 Small sun gear I
1 6 1 Planet gear carrier I
1 8 1Short planet gear I
1 9 1 Long planet gear I
10 Annulus and
output wheel of the planetary
/ (gearset
I 11 I Intermediate gear stage I
1 12 1 Differential assembly I
1 13 12nd - 4th gear brake I
1 14 1 2nd gear one-way clutch I
1 15 1 Large sun gear I - --
1 16 14th gear brake I
1 17 1 3rdl4th gear clutch I
~Iianetary gearset, rear I
I B I Planetary gearset, front I
Drive is transmitted from the torque converter (I)
to the transmission input shaft (2) and via the
3rdl4th gear clutch (1 7) to the planet gear carrier
(6).
The large sun gear (15) is held by the 4th gear
brake
(16), the 2nd gear one-way clutch (14) and
the 2nd-4th gear brake
(1 3).
N0TE:The short planet gears (8) and the small
sun gear (4) co-rotate, but they have no influence
on the transmission ratio.
The long planet gears (9) drive the annulus (10) in
the same direction of rotation as the output from
the engine.
The annulus is fixedly connected to the output
wheel of the planetary
gearset and drives the
intermediate gear stage
(11) in the opposite
direction of rotation to the output from the engine.
The intermediate gear stage drives the differential
assembly
(12) in the same direction of rotation as
the output from the engine.
2006.0 Fiesta 1212006 G380528en
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Automatic Transmission/Transaxle -
Vehicles With: 4-Speed Automatic
Transmission
(AW81-40)
DESCRIPTION AND OPERATION
Transmission ratio and power flow route
- reverse gear
2006.0 Fiesta 12/2006 G380528en
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Automatic Transmission/Transaxle -
Vehicles With: 4-Speed Automatic
307-01 -27 Transmission (AW81-40) 307-01 -27
DESCRIPTION AND OPERATION
Item Description
I 1 I From the torque converter I
1 2 I Transmission input shaft I
1 4 ISmaII sun gear I
11 Planet gear carrier I
1 7 1 Reverse gear brake I
1 8 1Short planet gear I
1 9 1 Long planet gear I
10 Annulus and output wheel
of the planetary
I (gearset
I 11 I Intermediate gear stage I
1 12 1 Differential assembly I
1 15 1 Large sun gear I
1 18 1 Reverse gear clutch I
I A I Planetary gearset, rear I
I B I Planetary gearset, front I
Drive is transmitted from the torque converter (1)
to the transmission input shaft
(2) and via the
r reverse gear clutch (1 8) to the large sun gear (1 5).
The planet gear carrier
(6) is held by the reverse
gear brake
(7).
The large sun gear drives the long planet gears
(9) in the opposite direction of rotation to the output
from the engine.
N0TE:The short planet gears (8) and the small
sun gear (4) co-rotate, but they have no influence
on the transmission ratio.
The long planet gears drive the annulus (1
0) in the
opposite direction of rotation to the output from the
engine.
The annulus is fixedly connected to the output
wheel of the planetary
gearset and drives the
intermediate gear stage (I
I ) in the same direction
of rotation as the output from the engine.
The intermediate gear stage drives the differential
assembly (1 2) in the opposite direction of rotation
to the output from the engine.
2006.0 Fiesta 1212006 G380528en
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Automatic Transmission/Transaxle -
Vehicles With: 4-Speed Automatic
Transmission
(AW81-40)
DESCRIPTION AND OPERATION
Transaxle Electronic Control System
Overview
--
2006.0 Fiesta 1212006 G380530en
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Automatic Transmission/Transaxle -
Vehicles With: 4-Speed Automatic
Transmission (AW81-40)
DESCRIPTION AND OPERATION
Item Description
1 5 1 Generic Electronic Module (GEM) I
I
1 6 1 Turbine Shaft Speed (TSS) sensor I
1 7 1 Output Shaft Speed (OSS) sensor I
1
2
3
4
l tem Description
Transmission control unit
Data Link Connector (DLC)
Powertrain Control Module (PCM)
Instrument cluster
1 8 I Transmission Range (TR) sensor I
1 9 1 Starter inhibit relay I
1 10 1 Backup lamp relay I
11 Transmission Fluid Temperature (TFT)
I I sensor
1 12 loverdrive switch I
1 13 1 Driver's side door ajar switch I
1 14 1 Solenoid valves in the main control body 1
Transmission control unit
Item Description
Electrical connector, vehicle wiring
harness
connector, transmission wiring
harness
--
The transmission control unit is located in the
'engine compartment on the left-hand side member.
The transmission control unit evaluates incoming
signals and controls the actuators accordingly.
2006.0 Fiesta 1212006 G380530en
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Automatic Transmission/Transaxle -
Vehicles With: 4-Speed Automatic
307-01 -30 Transmission (AW81-40) 307-01 -30
DESCRIPTION AND OPERATION
The transmission control unit can be diagnosed
with WDS via the DLC.
Gearshift strategies
Gearshift control
I A I Accelerator pedal position I
I B I vehicle speed 1
The current ratio is selected by the transmission
control unit either in accordance with the
requirements for low fuel consumption or in order
to meet the required driving performance.
The gearshift timing is selected in accordance with
a gearshift map which is programmed into the
control unit as a function of the accelerator pedal
position and the vehicle speed.
For kick-down (accelerator pedal pressed down at
least
95 %) the next lowest gear is selected, as
long as the engine speed allows it. All gearshift
timings are set by the transmission control unit to
the upper shift characteristic. The driver can feel the
kickdown point
in the
accelerator pedal as a slight increase in resistance
to the operation of the pedal.
This is influenced by the following variables:
accelerator pedal position and actuation,
vehicle speed,
brake pedal position,
selector lever position.
The following are actuated:
SSA shift solenoid valve,
SSB shift solenoid valve.
Hill climb mode
When the vehicle is in hill climb mode or towing a
trailer, the transmission control delays gearshifts
to prevent frequent shifting back and forth between
the gears.
2006.0 Fiesta 1u2oos
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