Acura CSX. Manual — part 245
*04
Shifting between 1st gear and 2nd gear in D and S with automatic shift mode
14-61
TORQUE
CONVERTER
2ND
ACCUMU-
LATOR
2ND
CLUTCH
3RD
CLUTCH
4TH
CLUTCH
5TH
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
3B
4
5A
5F
SB
55
1
90
94
SE
94
91
96
93
7
55
90
95
90
93
93
99
1
92
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
7
1A
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 X
X X
5H
5G
5E
5C
X
X
92
X 5N
55’
50 30
1A
5K
92
4’
X
5J
5L
55’
1
57
SD
X
X
SE
X
X
3
X
57
SE
1
20
X X
1B
20
X
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.
08/08/21 14:39:24 61SNR030_140_0063
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→
−
→
−
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*05
Driving in 2nd gear in D and S with automatic shift mode
14-62
Automatic Transmission
TORQUE
CONVERTER
2ND
ACCUMU-
LATOR
2ND
CLUTCH
3RD
CLUTCH
4TH
CLUTCH
5TH
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
3B
4
5A
5F
SB
55
1
90
94
SE
94
91
96
93
7
55
90
95
90
93
93
99
1
92
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
7
1A
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 X
X X
5H
5G
5E
5C
X
X
92
X 5N
55’
50 30
1A
5K
92
4’
X
5J
5L
55’
1
57
SD
X
X
SE
X
X
3
X
57
SE
1
20
X X
1B
20
X
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
The 2nd clutch pressure (20) is applied to the 2nd clutch, and the 2nd clutch is engaged securely.
NOTE: When used, ‘‘left’’ or ‘‘right’’ indicates direction on the hydraulic circuit.
08/08/21 14:39:26 61SNR030_140_0064
*06
Shifting between 2nd gear and 3rd gear in D and S with automatic shift mode
14-63
TORQUE
CONVERTER
2ND
ACCUMU-
LATOR
2ND
CLUTCH
3RD
CLUTCH
4TH
CLUTCH
5TH
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
3B
4
5A
5F
SB
55
1
90
94
SE
94
91
96
93
7
55
90
95
90
93
93
99
1
92
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
7
1A
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 X
X X
5H
5G
5E
5C
X
X
92
X 5N
55’
50 30
1A
5K
92
4’
X
5J
5L
55’
1
57
SD
X
X
SE
X
X
3
X
57
SE
1
20
X X
1B
20
X
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.
08/08/21 14:39:27 61SNR030_140_0065
*07
Driving in 3rd gear in D and S with automatic shift mode
14-64
Automatic Transmission
TORQUE
CONVERTER
2ND
ACCUMU-
LATOR
2ND
CLUTCH
3RD
CLUTCH
4TH
CLUTCH
5TH
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
3B
4
5A
5F
SB
55
1
90
94
SE
94
91
96
93
7
55
90
95
90
93
93
99
1
92
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
7
1A
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 X
X X
5H
5G
5E
5C
X
X
92
X 5N
55’
50 30
1A
5K
92
4’
X
5J
5L
55’
1
57
SD
X
X
SE
X
X
3
X
57
SE
1
20
X X
1B
20
X
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
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