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R Position: Driving in reverse gear
The PCM turns shift solenoid valve C OFF. Shift solenoid valve A keeps OFF and B keeps ON. Shift solenoid valve C is
turned OFF, and SH C pressure (SC) is applied to the right side of the reverse CPC valve. Then the reverse CPC valve
moves to the left side, creating full line pressure. Line pressure to the 5th clutch is the same as when shifting to the R
position, and 5th clutch pressure increases. The 5th clutch is engaged with line pressure mode.
Reverse Inhibitor Control
When the R position is selected while the vehicle is moving forward at speeds over 6 mph (10 km/h), the PCM outputs
to turn shift solenoid valves A and C ON; and shift solenoid valve B keeps ON. The reverse CPC valve is moved to right
side and covers the port to stop the line pressure (3') to the servo valve. The line pressure (3') is not applied to the
servo valve, and the 5th clutch pressure (50) is not applied to the 5th clutch. As a result, power is not transmitted to the
reverse position.
NOTE: When used, ''left'' or ''right'' indicates direction on the hydraulic circuit.
1ST-HOLD/4TH
ACCUMULATOR
15
40
TORQUE
CONVERTER
91
90
94
TORQUE
CONVERTER
CLUTCH
SOLENOID
VALVE
6
LOCK-UP
LA
TIMING VALVE
X
X
90 91
X X 90' 91'
58
91'
91
LA 94
LOCK-UP
SHIFT
VALVE
96 92
93
X 6
95
96
58 96
90'
93
X 90
92
X
LOCK-UP
CONTROL
90
95
VALVE
2
93
X
95
TORQUE
X
CONVERTER
CHECK VALVE
RELIEF VALVE
92 1
93'
X
COOLER CHECK
1
VALVE
99
ATF FILTER
1ST/1ST-HOLD CLUTCH
1ST ACCUMULATOR
10
4C
15 10 20 2ND
40
15
SHIFT
VALVE D
5J 4A 25
5M X
X 58 H6X
5N
5H
5M
SHIFT VALVE B
SB
20
9
5F
5E
H4X
H5X
5H 5C 5K
5D
5D 5G
SHIFT
VALVE A
5H
5F
5E
50X
5G
5J
5K
30
H3X
SA
X5B 5A 5B 51
SHIFT VALVE E
CPC
VALVE C
4C
SA
4C
4
1
58
55
X
4
MANUAL VALVE
AX
AX
MAINSHAFT
HX
COUNTERSHAFT
SECONDARY
SHAFT
X
95
95'
95
LUBRICATION
REGULATOR VALVE
CHECK VALVE
2ND ACCUMULATOR
3RD CLUTCH
3RD CLUTCH
TRANSMISSION FLUID
PRESSURE
3RD
SWITCH
ACCUMULATOR
30
CLUTCH
KICK-DOWN VALVE
30
4A
KICK-DOWN
CPC VALVE A
H9X
SBX9
SHORT VALVE
CPC VALVE B
H10X
4B
X
SHIFT VALVE C
5C
SC
5D 4A
6
4 H1X
4
5B H2X
4
10
5A
2
51
50
25
1
3
3''
10
3
3
9
57 SC
SERVO
CONTROL
VALVE
3'
X
4''
3''
REVERSE
4'
CPC
3'
VALVE
4''
SERVO VALVE
ATF PUMP
4TH CLUTCH
4TH CLUTCH
TRANSMISSION FLUID
5TH CLUTCH
PRESSURE
SWITCH
40 50
30
55
SB
4A AX
ON
SHIFT SOLENOID
VALVE B
4
56
X
OFF
SHIFT SOLENOID
VALVE C
SC
4
6
X
OFF
SHIFT SOLENOID
VALVE A
4B
57
5A
X
HX
HX AX
6
58
A/T CLUTCH PRESSURE
CONTROL SOLENOID
VALVE C
HX
HX AX
6
56
A/T CLUTCH PRESSURE
CONTROL SOLENOID
VALVE A
5
HX HX
AX
57
A/T CLUTCH PRESSURE
6
CONTROL SOLENOID
VALVE B
1
MODULATOR VALVE
4 X
10
4'
X
3''
14-307
5TH
ACCUMULATOR
50
(cont'd)
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Troubleshooting
