2002 MAZDA 6 brake

AUTOMATIC TRANSAXLE
K2–15
K2
X : Available
End Of SiePOWERTRAIN DESCRIPTIONA6E571401030207Outline
•In the powertrain system, the hydraulic pressure transported by the control valve operates the clutch, and
brake, and the planetary gear changes the gear ratio according to the driving conditions.
Structure
•The powertrain system consists of seven pairs of clutches, brake, brake band, two pairs of one-way clutches,
and simple type planetary gears.
Duty
typePressure
control
solenoidXX XX X
2-4 brake
solenoid
valveXX XX X
High
clutch
solenoid
valveXX XX X
TCC
solenoid
valveXXX
CAN
signalReduce
torque
signalXXX
Range
signalX
Turbine
speed
signalX
ATF
temperatu
re signalX
TCC
signalXX
Racing
select
signalX
MIL
indicate
request
signalX
AT
warning
light
request
signalX ComponentControl item
Shift
controlLine
pressure
controlReverse
inhibition
controlShift
transient
controlFeedbac
k controlTCC
controlN-D
select
controlSlope
mode
controlOBD
system

K2–16
AUTOMATIC TRANSAXLE
.
9
87
54
3
1
2
10
19
18
17
15
16
14
131112
20
21
6
A6E5714W071
1 Rear pinion gear
2 Rear internal gear
3 Low one-way clutch
4 Low and reverse brake
5 Low clutch
6 2-4 brake
7 Front internal gear
8 Reverse clutch
9High clutch
10 Front pinion gear
11 Front sun gear12 Rear sun gear
13 Reduction brake
14 Direct clutch
15 Reduction one-way clutch
16 Idler gear
17 Reduction gear
18 Reduction sun gear
19 Reduction pinion gear
20 Reduction internal gear
21 Output gear

AUTOMATIC TRANSAXLE
K2–17
K2
Operation
Note
•All rotation are viewed from the side cover.
Component description
Gear Position and Operation of Featured Parts
Component Function
Low clutch•Transmits rotation of low clutch drum to rear internal gear
•Operates in 1GR, 2GR, or 3GR position
2-4 brake•Prevents rotation of front sun gear
•Operates in 2GR, 4GR, or 5GR position
High clutch•Transmits rotation of high clutch drum to front planetary carrier
•Operates in 3GR, 4GR, or 5GR position
Reverse clutch•Transmits rotation of reverse clutch drum to front sun gear
•Operates when vehicle is reversing
Reduction brake•Prevents rotation of direct clutch drum and prevents rotation of reduction sun gear
Low and reverse brake•Prevents rotation of low and reverse brake hub
Direct clutch•Transmits rotation of reduction planetary carrier to reduction sun gear
•Operates in 5GR position
Low one-way clutch•Locks clockwise rotation of front planetary carrier
Reduction one-way clutch•Locks counter clockwise rotation of reduction sun gear
Range
P
R
N
D1GR
2GR
3GR
4GR
5GR
1GR
2GR
3GR
4GR
5GR
: TCC or engine braking is availableMGear positionGear ratioTCC operation
Engine brake Shift
2.970
3.801
2.131
1.364
0.935
0.685
3.801
2.131
1.364
0.935
0.685
A6E5714W013

K2–20
AUTOMATIC TRANSAXLE
1GR (M range)
LOW ONE-WAY
CLUTCH LOW
CLUTCH
LOW AND
REVERSE
BRAKE
2-4
BRAKE
REVERSE
CLUTCH
REAR
SUN
GEAR HIGH
CLUTCH
FRONT
PINION
GEAR
FRONT
INTERNAL
GEAR
FRONT
SUN
GEAR
REDUCTION
ONE-WAY
CLUTCH
REDUCTION
BRAKEREDUCTION
PINION
GEARREDUCTION
GEAR REAR
PINION
GEAR
REAR
INTERNAL
GEAR
REDUCTION
SUN
GEARREDUCTION
INTERNAL
GEAR
INPUT
COMPONENT OF FORCE
OUTPUT
OUTPUT (INTERMEDIATE)
FIXED
PINION IDLER
GEAR
DIRECT
CLUTCHOUTPUT
GEAR
A6E5714W016

AUTOMATIC TRANSAXLE
K2–21
K2
LOW ONE-WAY
CLUTCH LOW CLUTCHLOW AND
REVERSE BRAKE
2-4 BRAKE
REVERSE
CLUTCH
REAR SUN GEAR HIGH CLUTCH
FRONT
PINION
GEARFRONT
INTERNAL
GEAR
FRONT
SUN
GEAR
REDUCTION
ONE-WAY
CLUTCHREDUCTION
BRAKE
REDUCTION
PINION GEAR
REDUCTION
GEAR REAR PINION
GEAR REAR INTERNAL
GEAR
REDUCTION SUN
GEAR REDUCTION
INTERNAL GEAR
INPUT
COMPONENT OF FORCE
OUTPUT
OUTPUT (INTERMEDIATE)
FIXED
PINIONIDLER
GEAR DIRECT
CLUTCHOUTPUT GEAR
A6E5714W017

K2–48
AUTOMATIC TRANSAXLE
Function chart
Construction/Operation
Duty type
Normal high
•De-energized (OFF) or duty 0%
—Because the output port (solenoid pressure) and supply port (pilot pressure) connect in the solenoid, the
solenoid pressure supplied to the output port.
•Energized (ON) or duty 100%
—Because the output port (solenoid pressure) and the drain port connect, solenoid pressure is drained.
Normal low
•De-energized (OFF) or duty 0%
—Because the output port (solenoid pressure) and the drain port connect in the solenoid, the solenoid
pressure is drained.
•Energized (ON) or duty 100%
—Because the output port (solenoid pressure) and the supply port (pilot pressure) connect in the solenoid,
the solenoid pressure supplied to the output port.
Solenoid Type Characteristics Function
Pressure control solenoid
Repeats ON and OFF at 50
Hz (20 ms cycle); duty cycle
type (three-way type)Normal highControls pressure regulator
valve, regulates line pressure
Torque converter clutch
(TCC) solenoid valveNormal lowControls TCC engagement
and disengagement
2-4 brake solenoid valve
Normal highControl 2-4 brake
engagement and
disengagement
High clutch solenoid valveControl high clutch
engagement and
disengagement
Shift solenoid A
ON/OFF (three-way type)
Normal lowControl shift valve A
Shift solenoid BControl shift valve B
Shift solenoid CControl shift valve C
Reduction timing solenoid
valve
ON/OFF (two-way type)Control reduction reducing
valve
Neutral shift solenoidControl neutral shift valve and
reverse inhibitor valve
AMU0517S025
AMU0517S026

K2–54
AUTOMATIC TRANSAXLE
Shift diagram
.
End Of SieLINE PRESSURE CONTROL DESCRIPTIONA6E571418901205Outline
Features
•Line pressure is hydraulic pressure for operating friction elements such as the multiple disc clutches, multiple
disc brakes, and the brake band.
•To adjust to optimal line pressure according to engine load conditions and vehicle driving conditions,
continuous variable line pressure control from the pressure control solenoid is used.
•The line pressure control includes the basic control, line pressure control when shifting, backup control, and
other.
8/8
4/8
0/813
3
1
2 4
4
5 1
2
0{0} 20{12} 40{25} 60{37} 80{50} 100{62} 120{74} 140{87} 160{99}
180{112}200{124}
220{136}
2
3
34 4 5
7
5
43
1
2
6
A6E5714W070
1 TCC operation available
2 Throttle opening
3 TCC operation OFF
4 TCC operation ON5 Vehicle speed (km/h {mph})
6 Down shifting is inhibited until vehicle reaches
speed possible for downshifting
7 When decelerating below set vehicle speed,
executes automatic downshifting

K2–56
AUTOMATIC TRANSAXLE
Basic Line Pressure Control
•Control at vehicle-start or during normal driving. The pressure control solenoid is controlled so that the line
pressure is optimal according to the throttle opening angle.
The pressure characteristic is as shown in the graph at below. During normal driving (only in shift ranges for
forward travel), the line pressure is set lower than that of at vehicle-start; this is called “cutback.”
•Though the cutback control is selected in each driving pattern, it is not operated in the fail-safe mode. In the fail-
safe mode, the pressure before the cutback is retained and so the pressure is higher than that during normal
driving.
Line Pressure Control When Shifting
•Line pressure is controlled when shifting the transaxle to reduce shift shock. Line pressure is adjusted only
during shifting so that it is optimal at each shifting according to the driving conditions. During the control, engine
output torque is also reduced.
Backup Control
•When shifting down to employ engine braking during high-speed driving, line pressure is gradually increased,
thus increasing clutch capacity.
The backup control is operated regardless of the driving range when the engine brake is operated in 1GR or
when shifting down to 2GR-4GR.
AMU0517S065
AMU0517S032