ACURA CSX 2006 Service Repair Manual
Manufacturer: ACURA, Model Year: 2006, Model line: CSX, Model: ACURA CSX 2006Pages: 2893, PDF Size: 67.66 MB
Page 971 of 2893
Î
Regulator Valve
14-55
To TORQUE
CONVERTER
From ATF PUMP
To LUBRICATION and
To RELIEF VALVE
C
B
A
REGULATOR VALVE
ORIFICE
VALVE SPRING
STATOR
TORQUE CONVERTER
REGULATOR VALVE
REGULATOR
SPRING CAP STATOR SHAFT
ARM END STATOR SHAFT
REGULATOR VALVE BODY
The regulator valve maintains constant hydraulic pressure from the ATF pump to the hydraulic control system, while
also providing fluid to the lubrication system and the torque converter. The fluid from the ATF pump flows through B
and C. Fluid entering from B flows through the valve orifice to the A cavity. This pressure in the A cavity pushes the
regulator valve toward the valve spring side, and this movement of the regulator valve uncovers the fluid port to the
torque converter and the relief valve. The fluid flows out to the torque converter and the relief valve, and the regulator
valve returns under spring force. According to the l evel of the hydraulic pressure through B, the position of the
regulator valve changes, and the amount of fluid from C through torque converter also changes. This operation is
continuous, maintaining the line pressure.
Increases in hydraulic pressure according to torque are regulated by the regulator valve using stator torque reaction.
The stator shaft is splined with the stator in the torque converter, and the stator shaft arm end contacts the regulator
spring cap. When the vehicle is accelerating or climbing (torque converter range), stator torque reaction acts on the
stator shaft, and the stator shaft arm end pushes the regulator spring cap in the direction of the arrow in proportion to
the reaction. The stator reaction spring compresses, and the regulator valve moves to increase the line pressure which
is regulated by the regulator valve. The line pressure reaches its maximum when the stator torque reaction reaches its
maximum.
(cont’d)
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Page 972 of 2893
Hydraulic Controls (cont’d)
Servo Body
Accumulator
14-56Automatic Transmission
System Description (cont’d)
SHIFT SOLENOID
VALVE A
SHIFT SOLENOID
VALVE B SHIFT SOLENOID
VALVE C
SHIFT SOLENOID
VALVE D
SHIFT SOLENOID
VALVE E
SERVO BODY
SERVO VALVE SHIFT VALVE D
SERVO BODY REGULATOR
VALVE BODY
5TH ACCUMULATOR
3RD ACCUMULATOR
1ST ACCUMULATOR
2ND ACCUMULATOR
4TH ACCUMULATOR
The servo body contains the servo valve, shift valve D, the accumulators for 2nd, 4th, and 5th, and shift solenoid
valves A, B, C, D, and E.
The accumulators are located in the regulator valve body and the servo body. The regulator valve body contains the
1st and 3rd accumulators, and the servo body contains the 2nd, 4th, and 5th accumulators.
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Page 973 of 2893
(#'
)
Hydraulic Flow
Distribution of Hydraulic Pressure
Hydraulic Pressure at the Port for use in the hydraulic circuitPortNo. Hydraulic Pressure Port
No.Hydraulic Pressure
14-57
As the engine turns, the ATF pump starts to operate. Automatic transmission fluid (ATF) is drawn through the ATF
strainer (filter) and discharged into the hydraulic circuit. Then, ATF flowing from the ATF pump becomes line pressure
that is regulated by the regulator valve. Torque converter pressure from the regulator valve enters the torque
converter through the lock-up shift valve, and it is discharged from the torque converter. The torque converter check
valve prevents torque converter pressure from rising.
The PCM switches shift solenoid valves ON and OFF. The shift solenoid valve intercepts line pressure from the ATF
pump via the manual valve when the shift solenoid valve is OFF. When the shift solenoid valve is turned ON by the
PCM, line pressure changes to shift solenoid valve pressure at the shift solenoid valve, then the shift solenoid valve
pressure flows to the shift valve. Applying shift solenoid pressure to the shift valves moves the position of the shift
valve, and switches the port of the hydraulic circuit. The PCM also controls A/T clutch pressure control solenoid valves
A, B, and C. The A/T clutch pressure control solenoid valves regulate hydraulic pressure, and applies pressure to the
clutches to engage smoothly. The clutches receive optimum clutch pressure which is regulated by the A/T clutch
pressure control solenoid valves for comfortable driving and shifting under all conditions.
1 Line SB Shift solenoid valve B
3 Line SC Shift solenoid valve C
3’ Line SD Shift solenoid valve D 4 Line SE Shift solenoid valve E
4’ Line 10 1st clutch
4’’ Line 20 2nd clutch 7 Line 30 3rd clutch
1A 40 4th clutch 1B 50 5th clutch
3A 55 A/T clutch pressure control solenoid valve A 3B 55’ A/T clutch pressure control solenoid valve A
3C 56 A/T clutch pressure control solenoid valve B
5A 57 A/T clutch pressure control solenoid valve C 5B 90 Torque converter
5C 91 Torque converter
5D 92 Torque converter 5E 93 ATF cooler5F 94 Torque converter
5G A/T clutch pressure control solenoid valve B 95 Lubrication 5H A/T clutch pressure control solenoid valve C 96 Torque converter 5J A/T clutch pressure control solenoid valve C 97 Torque converter
5K A/T clutch pressure control solenoid valve C 99 Suction 5L A/T clutch pressure control solenoid valve C X Drain
5N A/T clutch pressure control solenoid valve C HX High position drain
SA Shift solenoid valve A AX Air drain
(cont’d)
Line or A/T clutch pressure control solenoid valve A
Line or A/T clutch pressure control solenoid valve A
Line or A/T clutch pressure control solenoid valve A
Line or A/T clutch pressure control solenoid valve A
Line or A/T clutch pressure control solenoid valve A
Line or A/T clutch pressure control solenoid valve A
Line or A/T clutch pressure control solenoid valve A
Line or A/T clutch pressure control solenoid valve A
Line or A/T clutch pressure control solenoid valve A
Line or A/T clutch pressure control solenoid valve B
Line or A/T clutch pressure control solenoid valve A or
B
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Page 974 of 2893
Î
Hydraulic Flow (cont’d)
N Position
14-58Automatic Transmission
System Description (cont’d)
TORQUE
CONVERTER
2ND
ACCUMU-
LATOR2ND
CLUTCH
3RD
CLUTCH 4TH
CLUTCH5TH
CLUTCH
4TH
ACCUMULATOR
TORQUE
CONVERTER
CHECK
VALVE SHIFT
SOLENOID
VALVES
SHIFT
VALVE D
SHIFT
VALVE A
LOCK-UP
SHIFT
VALVE
LOCK-UP
CONTROL
VALVE
RELIEF VALVE
COOLER
CHECK
VALVE
ATF
COOLER REGULATOR
VALVE SERVO VALVE SERVO
CONTROL
VALVE
MANUAL VALVE ATF PUMP
3RD CLUTCH
TRANSMISSION FLUID
PRESSURE SWITCH
1ST
CLUTCH
A/T CLUTCH
PRESSURE CONTROL
SOLENOID VALVES
3RD
ACCUMULATOR
1ST
ACCUMULATOR
5TH
ACCUMULATOR
2ND CLUTCH
TRANSMISSION FLUID
PRESSURE SWITCH
SHIFT
VALVE
C
SHIFT
VALVE
B SHIFT
VALVE E
20
30 50
SB
1
SA
5B
5A
SC
5K 5B
5C
4
4
3B4
5A
5F SB
55 1
90
94
SE
94
91
96 93
7
55
90
95
90
93
93
99 192
1
95 HX
1B 3
3’ 4
5G
91
X X
X
X
X X
10
97
93 X
95
56 40
50
10
55’ 90 96
X 7 AX
AX
HX
4’’3A
3A
71A
3
3’
3C
5N 5E
3C
5L
5J
SA
40
X 5F
5H
10
1
55
1 56
4’’ 57
4
95
30 30
95
10 40
20
57 X
XX
X
5H 5G 5E5C
X
X 92 X
5N 55’
50 30 1A
5K
92 4’X
5J5L
55’
1
57
SD
XX
SE
X X 3
X
57
SE
1
20
XX 1B 20X
X
3A X X
X
X
X
SC
SD
AX
3B
X 4’
X
X
AX
X
X
AX
X
X
IDLER
SHAFT
COUNTER-
SHAFT
SECONDARY
SHAFT MAINSHAFT IDLER GEAR
FINAL DRIVE
GEAR
A: OFF
B: ON
C: ON
D: OFF
E: OFF
A
B
C
The PCM controls the shift solenoid valves. The conditions of the shift solenoid valves and positions of the shift valves
are as follows: Shift solenoid valve A: OFF, and shift valve A remains on the right side
Shift solenoid valve B: ON, and shift valve B moves to the left side
Shift solenoid valve C: ON, and shift valve C moves to the left side
Shift solenoid valve D: OFF, and shift valve D remains on the left side
Shift solenoid valve E: OFF, and shift valve E remains on the left side
Line pressure (1) flows to the shift solenoid valves and A/T clutch pressure control solenoid valve A. Under this
condition, hydraulic pressure is not applied to the clutches.
NOTE: When used, ‘‘left’’ or ‘‘right’’ indicates direction on the hydraulic circuit.
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Page 975 of 2893
Î 1st gear shifting from N position
14-59
TORQUE
CONVERTER
2ND
ACCUMU-
LATOR2ND
CLUTCH
3RD
CLUTCH 4TH
CLUTCH5TH
CLUTCH
4TH
ACCUMULATOR
TORQUE
CONVERTER
CHECK
VALVE SHIFT
SOLENOID
VALVES
SHIFT
VALVE D
SHIFT
VALVE A
LOCK-UP
SHIFT
VALVE
LOCK-UP
CONTROL
VALVE
RELIEF VALVE
COOLER
CHECK
VALVE
ATF
COOLER REGULATOR
VALVE SERVO VALVE SERVO
CONTROL
VALVE
MANUAL VALVE ATF PUMP
3RD CLUTCH
TRANSMISSION FLUID
PRESSURE SWITCH
1ST
CLUTCH
A/T CLUTCH
PRESSURE CONTROL
SOLENOID VALVES
3RD
ACCUMULATOR
1ST
ACCUMULATOR
5TH
ACCUMULATOR
2ND CLUTCH
TRANSMISSION FLUID
PRESSURE SWITCH
SHIFT
VALVE
C
SHIFT
VALVE
B SHIFT
VALVE E
20
30 50
SB
1
SA
5B
5A
SC
5K 5B
5C
4
4
3B4
5A
5F SB
55 1
90
94
SE
94
91
96 93
7
55
90
95
90
93
93
99 192
1
95 HX
1B 3
3’ 4
5G
91
X X
X
X
X X
10
97
93 X
95
56 40
50
10
55’ 90 96
X 7 AX
AX
HX
4’’3A
3A
71A
3
3’
3C
5N 5E
3C
5L
5J
SA
40
X 5F
5H
10
1
55
1 56
4’’ 57
4
95
30 30
95
10 40
20
57 X
XX
X
5H 5G 5E5C
X
X 92 X
5N 55’
50 30 1A
5K
92 4’X
5J5L
55’
1
57
SD
XX
SE
X X 3
X
57
SE
1
20
XX 1B 20X
X
3A X X
X
X X
SC
SD
AX
3B
X 4’
X
X
AX
X
X
AX
X
X
A: OFF
B: ON
C: ON
D: OFF
E: OFF
A
B
C
IDLER
SHAFT
COUNTER-
SHAFT
SECONDARY
SHAFT MAINSHAFT IDLER GEAR
FINAL DRIVE
GEAR
The shift solenoid valves remain the same as in N when shifting to D from N. The manual valve is moved to the D
position, and uncovers line pressure port (4) leading to A/T clutch pressure control solenoid valve C. Hydraulic
pressure to the 1st clutch from A/T clutch pressure control solenoid valve A is created as shift solenoid valve A OFF,
and B and C remain ON. A/T clutch pressure control solenoid valve A pressure (55) changes to 1st clutch pressure (10)
at shift valve B, and flows to the 1st clutch. The 1st clutch is engaged gently when shifting to D from N.
NOTE: When used, ‘‘left’’ or ‘‘right’’ indicates direction on the hydraulic circuit.
(cont’d)
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Page 976 of 2893
àµ àµ à µ
ൠൠà
Î
Hydraulic Flow (cont’d)
Driving in 1st gear in D and S with automatic shift mode
14-60 Automatic Transmission
System Description (cont’d)
TORQUE
CONVERTER
2ND
ACCUMU-
LATOR2ND
CLUTCH
3RD
CLUTCH 4TH
CLUTCH5TH
CLUTCH
4TH
ACCUMULATOR
TORQUE
CONVERTER
CHECK
VALVE SHIFT
SOLENOID
VALVES
SHIFT
VALVE D
SHIFT
VALVE A
LOCK-UP
SHIFT
VALVE
LOCK-UP
CONTROL
VALVE
RELIEF VALVE
COOLER
CHECK
VALVE
ATF
COOLER REGULATOR
VALVE SERVO VALVE SERVO
CONTROL
VALVE
MANUAL VALVE ATF PUMP
3RD CLUTCH
TRANSMISSION FLUID
PRESSURE SWITCH
1ST
CLUTCH
A/T CLUTCH
PRESSURE CONTROL
SOLENOID VALVES
3RD
ACCUMULATOR
1ST
ACCUMULATOR
5TH
ACCUMULATOR
2ND CLUTCH
TRANSMISSION FLUID
PRESSURE SWITCH
SHIFT
VALVE
C
SHIFT
VALVE
B SHIFT
VALVE E
20
30 50
SB
1
SA
5B
5A
SC
5K 5B
5C
4
4
3B4
5A
5F SB
55 1
90
94
SE
94
91
96 93
7
55
90
95
90
93
93
99 192
1
95 HX
1B 3
3’ 4
5G
91
X X
X
X
X X
10
97
93 X
95
56 40
50
10
55’ 90 96
X 7 AX
AX
HX
4’’3A
3A
71A
3
3’
3C
5N 5E
3C
5L
5J
SA
40
X 5F
5H
10
1
55
1 56
4’’ 57
4
95
30 30
95
10 40
20
57 X
XX
X
5H 5G 5E5C
X
X 92 X
5N 55’
50 30 1A
5K
92 4’X
5J5L
55’
1
57
SD
XX
SE
X X 3
X
57
SE
1
20
XX 1B 20X
X
3A X X
X
X X
SC
SD
AX
3B
X 4’
X
X
AX
X
X
AX
X
X
A: ON
B: ON
C: ON
D: OFF
E: OFF
A
B
C
IDLER
SHAFT
COUNTER-
SHAFT
SECONDARY
SHAFT MAINSHAFT IDLER GEAR
FINAL DRIVE
GEAR
The PCM turns shift solenoid valve A ON, B and C remain ON, and D and E remain OFF. Shift solenoid valve A
pressure (SA) is applied to the right side of shift valve A. Shift valve A is moved to the left side to uncover the line
pressure port leading to the 1st clutch, and to cover the A/T clutch pressure control solenoid valve pressure port.
Fluid flows to the 1st clutch by way of:
Line pressure (1) Shift valve D Line pressure (1A) Shift valve A Line pressure (1B) Manual valve Line
pressure (5A) Shift valve C Line pressure (5B) Shift valve B 1st clutch pressure (10) 1st clutch
The 1st clutch pressure (10) is applied to the 1st clutch, and the 1st clutch is engaged securely.
NOTE: When used, ‘‘left’’ or ‘‘right’’ indicates direction on the hydraulic circuit.
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Page 977 of 2893
Î Shifting between 1st gear and 2nd gear in D and S with automatic shift mode
14-61
TORQUE
CONVERTER
2ND
ACCUMU-
LATOR2ND
CLUTCH
3RD
CLUTCH 4TH
CLUTCH5TH
CLUTCH
4TH
ACCUMULATOR
TORQUE
CONVERTER
CHECK
VALVE SHIFT
SOLENOID
VALVES
SHIFT
VALVE D
SHIFT
VALVE A
LOCK-UP
SHIFT
VALVE
LOCK-UP
CONTROL
VALVE
RELIEF VALVE
COOLER
CHECK
VALVE
ATF
COOLER REGULATOR
VALVE SERVO VALVE SERVO
CONTROL
VALVE
MANUAL VALVE ATF PUMP
3RD CLUTCH
TRANSMISSION FLUID
PRESSURE SWITCH
1ST
CLUTCH
A/T CLUTCH
PRESSURE CONTROL
SOLENOID VALVES
3RD
ACCUMULATOR
1ST
ACCUMULATOR
5TH
ACCUMULATOR
2ND CLUTCH
TRANSMISSION FLUID
PRESSURE SWITCH
SHIFT
VALVE
C
SHIFT
VALVE
B SHIFT
VALVE E
20
30 50
SB
1
SA
5B
5A
SC
5K 5B
5C
4
4
3B4
5A
5F SB
55 1
90
94
SE
94
91
96 93
7
55
90
95
90
93
93
99 192
1
95 HX
1B 3
3’ 4
5G
91
X X
X
X
X X
10
97
93 X
95
56 40
50
10
55’ 90 96
X 7 AX
AX
HX
4’’3A
3A
71A
3
3’
3C
5N 5E
3C
5L
5J
SA
40
X 5F
5H
10
1
55
1 56
4’’ 57
4
95
30 30
95
10 40
20
57 X
XX
X
5H 5G 5E5C
X
X 92 X
5N 55’
50 30 1A
5K
92 4’X
5J5L
55’
1
57
SD
XX
SE
X X 3
X
57
SE
1
20
XX 1B 20X
X
3A X X
X
X X
SC
SD
AX
3B
X 4’
X
X
AX
X
X
AX
X
X
A: OFF
B: ON
C: ON
D: OFF
E: OFF
A
B
C
IDLER
SHAFT
COUNTER-
SHAFT
SECONDARY
SHAFT MAINSHAFT IDLER GEAR
FINAL DRIVE
GEAR
As the speed of the vehicle reaches the programmed value, the PCM turns shift solenoid valve A OFF, B and C remain
ON, and D and E remain OFF. Shift solenoid valve A pressure (SA) in the right side of shift valve A is released. Shift
valve A is moved to the right side uncovering the A/T clutch pressure control solenoid valve A and B pressure port
leading to the 1st and 2nd clutches. The PCM actuates the A/T clutch pressure control solenoid valve to regulate
hydraulic pressure. A/T clutch pressure control solenoid valve A pressure (55) changes to 1st clutch pressure (10) at
shift valve B. A/T clutch pressure control solenoid valve B pressure (56) changes to (5E) at shift valve C and to (5F) at
shift valve B, and becomes 2nd clutch pressure (20) at shift valve A. The 1st and 2nd clutches are engaged gently.
NOTE: When used, ‘‘left’’ or ‘‘right’’ indicates direction on the hydraulic circuit.
(cont’d)
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Page 978 of 2893
à µ ൠàµ
ൠà
Î
Hydraulic Flow (cont’d)
Driving in 2nd gear in D and S with automatic shift mode
14-62 Automatic Transmission
System Description (cont’d)
TORQUE
CONVERTER
2ND
ACCUMU-
LATOR2ND
CLUTCH
3RD
CLUTCH 4TH
CLUTCH5TH
CLUTCH
4TH
ACCUMULATOR
TORQUE
CONVERTER
CHECK
VALVE SHIFT
SOLENOID
VALVES
SHIFT
VALVE D
SHIFT
VALVE A
LOCK-UP
SHIFT
VALVE
LOCK-UP
CONTROL
VALVE
RELIEF VALVE
COOLER
CHECK
VALVE
ATF
COOLER REGULATOR
VALVE SERVO VALVE SERVO
CONTROL
VALVE
MANUAL VALVE ATF PUMP
3RD CLUTCH
TRANSMISSION FLUID
PRESSURE SWITCH
1ST
CLUTCH
A/T CLUTCH
PRESSURE CONTROL
SOLENOID VALVES
3RD
ACCUMULATOR
1ST
ACCUMULATOR
5TH
ACCUMULATOR
2ND CLUTCH
TRANSMISSION FLUID
PRESSURE SWITCH
SHIFT
VALVE
C
SHIFT
VALVE
B SHIFT
VALVE E
20
30 50
SB
1
SA
5B
5A
SC
5K 5B
5C
4
4
3B4
5A
5F SB
55 1
90
94
SE
94
91
96 93
7
55
90
95
90
93
93
99 192
1
95 HX
1B 3
3’ 4
5G
91
X X
X
X
X X
10
97
93 X
95
56 40
50
10
55’ 90 96
X 7 AX
AX
HX
4’’3A
3A
71A
3
3’
3C
5N 5E
3C
5L
5J
SA
40
X 5F
5H
10
1
55
1 56
4’’ 57
4
95
30 30
95
10 40
20
57 X
XX
X
5H 5G 5E5C
X
X 92 X
5N 55’
50 30 1A
5K
92 4’X
5J5L
55’
1
57
SD
XX
SE
X X 3
X
57
SE
1
20
XX 1B 20X
X
3A X X
X
X X
SC
SD
AX
3B
X 4’
X
X
AX
X
X
AX
X
X
A: OFF
B: ON
C: OFF
D: ON
E: OFF
A
B
C
IDLER
SHAFT
COUNTER-
SHAFT
SECONDARY
SHAFT MAINSHAFT IDLER GEAR
FINAL DRIVE
GEAR
The PCM turns shift solenoid valve C OFF, D ON, A and E remain OFF, and B remains ON. Shift solenoid valve C
pressure (SC) in the right side of shift valve C is released. Shift valve C moves to the right side to switch the ports. This
movement covers the ports to block A/T clutch pressure control solenoid valve pressure at shift valves C and A, and
uncover the line pressure port leading to the 2nd clutch.
Fluid flows to 2nd clutch by way of:
Line pressure (1) Manual valve Line pressure (4) Shift valve C Line pressure (5E) Shift valve B Line
pressure (5F) Shift valve A 2nd clutch pressure (20) 2nd clutch
The2ndclutchpressure(20)isappliedtothe2ndclutch,andthe2ndclutchisengagedsecurely.
NOTE: When used, ‘‘left’’ or ‘‘right’’ indicates direction on the hydraulic circuit.
08/08/21 14:39:26 61SNR030_140_0064
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Page 979 of 2893
Î Shifting between 2nd gear and 3rd gear in D and S with automatic shift mode
14-63
TORQUE
CONVERTER
2ND
ACCUMU-
LATOR2ND
CLUTCH
3RD
CLUTCH 4TH
CLUTCH5TH
CLUTCH
4TH
ACCUMULATOR
TORQUE
CONVERTER
CHECK
VALVE SHIFT
SOLENOID
VALVES
SHIFT
VALVE D
SHIFT
VALVE A
LOCK-UP
SHIFT
VALVE
LOCK-UP
CONTROL
VALVE
RELIEF VALVE
COOLER
CHECK
VALVE
ATF
COOLER REGULATOR
VALVE SERVO VALVE SERVO
CONTROL
VALVE
MANUAL VALVE ATF PUMP
3RD CLUTCH
TRANSMISSION FLUID
PRESSURE SWITCH
1ST
CLUTCH
A/T CLUTCH
PRESSURE CONTROL
SOLENOID VALVES
3RD
ACCUMULATOR
1ST
ACCUMULATOR
5TH
ACCUMULATOR
2ND CLUTCH
TRANSMISSION FLUID
PRESSURE SWITCH
SHIFT
VALVE
C
SHIFT
VALVE
B SHIFT
VALVE E
20
30 50
SB
1
SA
5B
5A
SC
5K 5B
5C
4
4
3B4
5A
5F SB
55 1
90
94
SE
94
91
96 93
7
55
90
95
90
93
93
99 192
1
95 HX
1B 3
3’ 4
5G
91
X X
X
X
X X
10
97
93 X
95
56 40
50
10
55’ 90 96
X 7 AX
AX
HX
4’’3A
3A
71A
3
3’
3C
5N 5E
3C
5L
5J
SA
40
X 5F
5H
10
1
55
1 56
4’’ 57
4
95
30 30
95
10 40
20
57 X
XX
X
5H 5G 5E5C
X
X 92 X
5N 55’
50 30 1A
5K
92 4’X
5J5L
55’
1
57
SD
XX
SE
X X 3
X
57
SE
1
20
XX 1B 20X
X
3A X X
X
X X
SC
SD
AX
3B
X 4’
X
X
AX
X
X
AX
X
X
A: OFF
B: ON
C: ON
D: ON
E: OFF
A
B
C
IDLER
SHAFT
COUNTER-
SHAFT
SECONDARY
SHAFT MAINSHAFT IDLER GEAR
FINAL DRIVE
GEAR
As the speed of the vehicle reaches the programmed value, the PCM turns shift solenoid valve C ON, A and E remain
OFF, and B and D remain ON. Shift solenoid valve C pressure (SC) is applied to the right side of shift valve C. Shift
valve C is moved to the left side uncovering the A/T clutch pressure control solenoid valve B and C pressure ports
leading to the 2nd and 3rd clutches. The PCM actuates the A/T clutch pressure control solenoid valves to regulate
hydraulic pressure. A/T clutch pressure control solenoid valve B pressure (56) changes to 2nd clutch pressure (20) at
shift valve A. A/T clutch pressure control solenoid valve C pressure (57) changes to (5H) at shift valve C and to (5K) at
shift valve B, and becomes 3rd clutch pressure (30) at shift valve A. The 2nd and 3rd clutches are engaged gently.
NOTE: When used, ‘‘left’’ or ‘‘right’’ indicates direction on the hydraulic circuit.
(cont’d)
08/08/21 14:39:27 61SNR030_140_0065
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DYNOMITE -2009-
Page 980 of 2893
Î
Hydraulic Flow (cont’d)
Driving in 3rd gear in D and S with automatic shift mode
14-64Automatic Transmission
System Description (cont’d)
TORQUE
CONVERTER
2ND
ACCUMU-
LATOR2ND
CLUTCH
3RD
CLUTCH 4TH
CLUTCH5TH
CLUTCH
4TH
ACCUMULATOR
TORQUE
CONVERTER
CHECK
VALVE SHIFT
SOLENOID
VALVES
SHIFT
VALVE D
SHIFT
VALVE A
LOCK-UP
SHIFT
VALVE
LOCK-UP
CONTROL
VALVE
RELIEF VALVE
COOLER
CHECK
VALVE
ATF
COOLER REGULATOR
VALVE SERVO VALVE SERVO
CONTROL
VALVE
MANUAL VALVE ATF PUMP
3RD CLUTCH
TRANSMISSION FLUID
PRESSURE SWITCH
1ST
CLUTCH
A/T CLUTCH
PRESSURE CONTROL
SOLENOID VALVES
3RD
ACCUMULATOR
1ST
ACCUMULATOR
5TH
ACCUMULATOR
2ND CLUTCH
TRANSMISSION FLUID
PRESSURE SWITCH
SHIFT
VALVE
C
SHIFT
VALVE
B SHIFT
VALVE E
20
30 50
SB
1
SA
5B
5A
SC
5K 5B
5C
4
4
3B4
5A
5F SB
55 1
90
94
SE
94
91
96 93
7
55
90
95
90
93
93
99 192
1
95 HX
1B 3
3’ 4
5G
91
X X
X
X
X X
10
97
93 X
95
56 40
50
10
55’ 90 96
X 7 AX
AX
HX
4’’3A
3A
71A
3
3’
3C
5N 5E
3C
5L
5J
SA
40
X 5F
5H
10
1
55
1 56
4’’ 57
4
95
30 30
95
10 40
20
57 X
XX
X
5H 5G 5E5C
X
X 92 X
5N 55’
50 30 1A
5K
92 4’X
5J5L
55’
1
57
SD
XX
SE
X X 3
X
57
SE
1
20
XX 1B 20X
X
3A X X
X
X X
SC
SD
AX
3B
X 4’
X
X
AX
X
X
AX
X
X
A: OFF
B: OFF
C: ON
D: OFF
E: OFF
A
B
C
IDLER
SHAFT
COUNTER-
SHAFT
SECONDARY
SHAFT MAINSHAFT IDLER GEAR
FINAL DRIVE
GEAR
The PCM turns shift solenoid valves B and D OFF, A and E remain OFF, and C remains ON. Shift solenoid valve B
pressure (SB) in the right side of shift valve B is released, and shift valve B is moved to the right side. Shift solenoid
valve D pressure (SD) in the left side of shift valve D is released, and shift valve D is moved to the left side. This valve
movement causes A/T clutch pressure control solenoid valve C pressure port leading to the 3rd clutch.
A/T clutch pressure control solenoid valve C pressure (57) changes to (5J) to be directed to shift solenoid valve D and
to (5K) at shift valve B, and becomes 3rd clutch pressure (30) at shift valve A. 3rd clutch pressure (30) is applied to the
3rd clutch, and the 3rd clutch is engaged securely.
NOTE: When used, ‘‘left’’ or ‘‘right’’ indicates direction on the hydraulic circuit.
08/08/21 14:39:29 61SNR030_140_0066
ProCarManuals.com
DYNOMITE -2009-