2008 INFINITI QX56 Factory Service Manual

Page 3553 of 4083

INFINITI QX56 2008  Factory Service Manual TM-6
< BASIC INSPECTION >
DIAGNOSIS AND REPAIR WORKFLOW
>> GO TO 3.
3.CHECK DTC
1. Check DTC.
2. Perform the following procedure if DTC is detected.
• Record DTC.
• Erase DTC. Refer to  TM-30, "
O

Page 3554 of 4083

INFINITI QX56 2008  Factory Service Manual DIAGNOSIS AND REPAIR WORKFLOWTM-7
< BASIC INSPECTION >
CEF
G H
I
J
K L
M A
B
TM
N
O P
DIAGNOSTIC WORK SHEET
Symptoms �† Vehicle does not move. ( �† Any position �† Particular position)
�†  No

Page 3555 of 4083

INFINITI QX56 2008  Factory Service Manual TM-8
< FUNCTION DIAGNOSIS >
A/T CONTROL SYSTEM
FUNCTION DIAGNOSIS
A/T CONTROL SYSTEM
Cross-Sectional View (2WD models)INFOID:0000000001603987
1. Front planetary gear2. Mid planetary gear 3. Rear plane

Page 3556 of 4083

INFINITI QX56 2008  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:0000000001603988
Shift MechanismINFOID:0000000001603989
The automatic transmission

Page 3557 of 4083

INFINITI QX56 2008  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 clutch3. Direct clutch
4. High and low reverse clutch 5. Reverse brake6. Fo

Page 3558 of 4083

INFINITI QX56 2008  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 whi

Page 3559 of 4083

INFINITI QX56 2008  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” Pos

Page 3560 of 4083

INFINITI QX56 2008  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