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Automatic Transmission
System Description (cont'd)
Hydraulic Flow (cont'd)
D Position: Shifting between 3rd gear and 4th gear
As the speed of the vehicle reaches the prescribed value, the PCM turns shift solenoid valve B OFF. The PCM also
controls the A/T clutch pressure control solenoid valve A to apply LS A pressure (56) to CPC valve A. Shift solenoid
valve A stays OFF, and C stays ON. Shift solenoid valve B is turned OFF, and SH B pressure (SB) is applied to the right
side of shift valve B. Then shift valve B is moved to the left side to switch the port of line pressure and CPC pressure.
Line pressure (4) becomes CPC A pressure (4A) at CPC valve A, and becomes CPC B pressure (4B) at CPC valve B. CPC
A pressure (4A) becomes 4th clutch pressure (40) at shift valve D via shift valves C, A, and B, and flows to the 4th
clutch. The 3rd clutch pressure is changed to CPC pressure mode by switching the position of shift valve B. The 1st
clutch is also engaged. No power is transmitted because of the one-way clutch.
NOTE: When used, ''left'' or ''right'' indicates direction on the hydraulic circuit.
1ST-HOLD/4TH
ACCUMULATOR
TORQUE
CONVERTER
91
90
94
TORQUE
CONVERTER
CLUTCH
SOLENOID
VALVE
6
LOCK-UP
LA
TIMING VALVE
X
90 91
X X 90' 91'
91'
91
LA 94
96 92
93
X 6
95
58 96
90'
96
X 90
93
92
X
LOCK-UP
CONTROL
90
VALVE
93
X
TORQUE
X
CONVERTER
CHECK VALVE
RELIEF VALVE
93'
X
COOLER CHECK
VALVE
99
ATF FILTER
14-300
1ST ACCUMULATOR
1ST/1ST-HOLD CLUTCH
10
15
4C
40
15
SHIFT
40
VALVE D
5J 4A 25
5M X
X 58 H6X
5N
5H
5M
SHIFT VALVE B
20
9
5F
5E
H4X
H5X
5H 5C 5K
5D 5G
SHIFT
VALVE A
5F
5E
50X
5G
5K
5J
30
X
H3X
X5B 5A 5B 51
58
SHIFT VALVE E
CPC
VALVE C
4C
SA
4C
LOCK-UP
SHIFT
4
1
55
VALVE
X
MANUAL VALVE
95
2
AX
AX
HX
95
X
95
95'
92 1
95
1
LUBRICATION
REGULATOR VALVE
CHECK VALVE
2ND ACCUMULATOR
3RD CLUTCH
TRANSMISSION FLUID
PRESSURE
SWITCH
15 10 20 2ND
CLUTCH
KICK-DOWN VALVE
SB
30
4A
KICK-DOWN
5D
H9X
SBX9
SHORT VALVE
H10X
4B
SHIFT VALVE C
5C
5H
SA
6
4
4 H1X
10
58
4
2
51
50
25
1
3
3''
10
3
57 SC
MAINSHAFT
SERVO
CONTROL
COUNTERSHAFT
VALVE
SECONDARY
X
3'
SHAFT
3''
REVERSE
CPC
VALVE
SERVO VALVE
ATF PUMP
3RD CLUTCH
4TH CLUTCH
4TH CLUTCH
TRANSMISSION FLUID
3RD
PRESSURE
ACCUMULATOR
SWITCH
30
30
4A AX
4
56
CPC VALVE A
CPC VALVE B
4
6
4B
57
X
SC
5D 4A
HX
4
5B H2X
5A
HX
HX HX
6
1
MODULATOR VALVE
3
9
4 X
10
4''
4'
4'
X
3'
4''
3''
5TH CLUTCH
5TH
ACCUMULATOR
40 50
55
50
SB
OFF
SHIFT SOLENOID
VALVE B
X
ON
SHIFT SOLENOID
VALVE C
SC
X
OFF
SHIFT SOLENOID
VALVE A
5A
X
HX AX
6
58
A/T CLUTCH PRESSURE
CONTROL SOLENOID
VALVE C
HX AX
6
56
A/T CLUTCH PRESSURE
CONTROL SOLENOID
VALVE A
5
AX
57
A/T CLUTCH PRESSURE
CONTROL SOLENOID
VALVE B
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