2009 INFINITI QX56 Factory Service Manual

Page 3657 of 4171

INFINITI QX56 2009  Factory Service Manual 
A/T CONTROL SYSTEMTM-9
< FUNCTION DIAGNOSIS >
CEF
G H
I
J
K L
M A
B
TM
N
O P
Cross-Sectional View (4WD models)INFOID:0000000003771806
Shift MechanismINFOID:0000000003771807
The automatic transmission

Page 3658 of 4171

INFINITI QX56 2009  Factory Service Manual 
TM-10
< FUNCTION DIAGNOSIS >
A/T CONTROL SYSTEM
FUNCTION OF CLUTCH AND BRAKE 
CLUTCH AND BAND CHART 
1. Front brake  2. Input clutch 3. Direct clutch
4. High and low reverse clutch 5. Reverse brake 6

Page 3659 of 4171

INFINITI QX56 2009  Factory Service Manual 
A/T CONTROL SYSTEMTM-11
< FUNCTION DIAGNOSIS >
CEF
G H
I
J
K L
M A
B
TM
N
O P
 —Operates
 —Operates during “pro gressive” acceleration.
 —Operates and effects power transmission while co

Page 3660 of 4171

INFINITI QX56 2009  Factory Service Manual 
TM-12
< FUNCTION DIAGNOSIS >
A/T CONTROL SYSTEM
Since both the forward brake and the reverse brake are released, torque from the input shaft drive is not trans-
mitted to the output shaft.
“P” Po

Page 3661 of 4171

INFINITI QX56 2009  Factory Service Manual 
A/T CONTROL SYSTEMTM-13
< FUNCTION DIAGNOSIS >
CEF
G H
I
J
K L
M A
B
TM
N
O P
“1” Position 1GR
 The front brake fastens the front sun gear.
 The forward brake and the forward one-way clutch 
re

Page 3662 of 4171

INFINITI QX56 2009  Factory Service Manual 
TM-14
< FUNCTION DIAGNOSIS >
A/T CONTROL SYSTEM
“D”, “4”, “3” Positions 2GR
 The forward brake and the forward one-way clutch regulate reverse rotation of the mid sun gear.
 The 3rd one

Page 3663 of 4171

INFINITI QX56 2009  Factory Service Manual 
A/T CONTROL SYSTEMTM-15
< FUNCTION DIAGNOSIS >
CEF
G H
I
J
K L
M A
B
TM
N
O P
“2”, “1” Positions 2GR
 The front brake fastens the front sun gear.
 The forward brake and the forward one-way

Page 3664 of 4171

INFINITI QX56 2009  Factory Service Manual 
TM-16
< FUNCTION DIAGNOSIS >
A/T CONTROL SYSTEM
“D”, “4”, “3” Positions 3GR
 The front brake fastens the front sun gear.
 The direct clutch is coupled, and the rear carrier and rear sun