INFINITI QX56 2008 Factory Service Manual

TM-164
< SYMPTOM DIAGNOSIS >
SYSTEM SYMPTOM
34Slips/Will
Not En-
gage When you press the
accelerator pedal and
shift speed D2→ D1
the engine idles or the
transmission slips. ON vehicle
1. Fluid level and state
TM-178
2. Output speed sensor and vehicle speed sensor TM-48,
TM-74
3. Direct clutch solenoid valve TM-84
4. CAN communication line LAN-4
5. Line pressure testTM-187
6. Control valve with TCMTM-201
OFF vehicle7. Torque converter
TM-232
8. Oil pump assemblyTM-250
9. 3rd one-way clutchTM-252
10. 1st one-way clutchTM-259
11. Gear systemTM-220
12. Reverse brakeTM-232
13. Forward one- way clutch (Parts behind drum support is
impossible to perform inspection by disassembly. Refer to
TM-8
, TM-9
TM-232
14. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to TM-8
, TM-9TM-232
35 With selector lever in
“D” position
, accelera-
tion is extremely poor. ON vehicle
1. Fluid level and state
TM-178
2. Line pressure testTM-187
3. Accelerator pedal position sensor TM-69
4. CAN communication line LAN-4
5. Transmission range switchTM-43
6. Control cable adjustmentTM-194
7. Control valve with TCMTM-201
OFF vehicle8. Torque converter
TM-232
9. Oil pump assemblyTM-250
10. 1st one-way clutchTM-259
11. Gear systemTM-220
12. Reverse brakeTM-232
13. Forward one- way clutch (Parts behind drum support is
impossible to perform inspection by disassembly. Refer to
TM-8
, TM-9
TM-232
14. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to TM-8
, TM-9TM-232
No. Items Symptom Condition Diagnostic ItemReference
page
Revision: March 2010 2008 QX56

SYSTEM SYMPTOMTM-165
< SYMPTOM DIAGNOSIS >
CEF
G H
I
J
K L
M A
B
TM
N
O P
36
Slips/Will
Not En-
gage With selector lever in
“R” position, accelera-
tion is extremely poor.
ON vehicle1. Fluid level and state
TM-178
2. Line pressure testTM-187
3. Accelerator pedal position sensor TM-69
4. High and low reverse clutch solenoid valve LAN-4
5. CAN communication lineLAN-4
6. Transmission range switchTM-43
7. Control cable adjustmentTM-194
8. Control valve with TCMTM-201
OFF vehicle9. Gear system
TM-22010. Output shaftTM-232
11. Reverse brakeTM-232
37While starting off by
accelerating in 1st, en-
gine races or slippage
occurs. ON vehicle
1. Fluid level and state
TM-178
2. Line pressure testTM-187
3. Accelerator pedal position sensor TM-69
4. CAN communication line LAN-4
5. Control valve with TCMTM-201
OFF vehicle6. Torque converter
TM-232
7. Oil pump assemblyTM-250
8. 3rd one-way clutchTM-252
9. 1st one-way clutchTM-259
10. Gear systemTM-220
11. Reverse brakeTM-232
12. Forward one- way clutch (Parts behind drum support is
impossible to perform inspection by disassembly. Refer to
TM-8
, TM-9
TM-232
13. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to TM-8
, TM-9TM-232
38 While accelerating in
2nd, engine races or
slippage occurs. ON vehicle
1. Fluid level and state
TM-178
2. Line pressure testTM-187
3. Accelerator pedal position sensor TM-69
4. CAN communication line LAN-4
5. Direct clutch solenoid valveTM-84
6. Control valve with TCMTM-201
OFF vehicle7. Torque converter
TM-232
8. Oil pump assemblyTM-250
9. 3rd one-way clutchTM-252
10. Gear systemTM-220
11. Direct clutchTM-266
12. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to TM-8
, TM-9TM-232
No. Items Symptom Condition Diagnostic ItemReference
page
Revision: March 2010 2008 QX56

TM-166
< SYMPTOM DIAGNOSIS >
SYSTEM SYMPTOM
39Slips/Will
Not En-
gage While accelerating in
3rd, engine races or
slippage occurs.
ON vehicle
1. Fluid level and state
TM-178
2. Line pressure testTM-187
3. Accelerator pedal position sensor TM-69
4. CAN communication line LAN-4
5. High and low reverse clutch solenoid valveTM-86
6. Control valve with TCMTM-201
OFF vehicle7. Torque converter
TM-232
8. Oil pump assemblyTM-250
9. 3rd one-way clutchTM-252
10. Gear systemTM-220
11. High and low reverse clutchTM-264
12. Forward one- way clutch (Parts behind drum support is
impossible to perform inspection by disassembly. Refer to
TM-8
, TM-9
TM-232
13. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to TM-8
, TM-9TM-232
40 While accelerating in
4th, engine races or
slippage occurs. ON vehicle
1. Fluid level and state
TM-178
2. Line pressure testTM-187
3. Accelerator pedal position sensor TM-69
4. CAN communication line LAN-4
5. Input clutch solenoid valveTM-80
6. Control valve with TCMTM-201
OFF vehicle7. Torque converter
TM-232
8. Oil pump assemblyTM-250
9. Input clutchTM-254
10. Gear systemTM-220
11. High and low reverse clutchTM-264
12. Direct clutchTM-266
No. ItemsSymptom Condition Diagnostic ItemReference
page
Revision: March 2010 2008 QX56

SYSTEM SYMPTOMTM-167
< SYMPTOM DIAGNOSIS >
CEF
G H
I
J
K L
M A
B
TM
N
O P
41
Slips/Will
Not En-
gage While accelerating in
5th, engine races or
slippage occurs.
ON vehicle
1. Fluid level and state
TM-178
2. Line pressure testTM-187
3. Accelerator pedal position sensor TM-69
4. CAN communication line LAN-4
5. Front brake solenoid valveTM-82
6. Control valve with TCMTM-201
OFF vehicle7. Torque converter
TM-232
8. Oil pump assemblyTM-250
9. Front brake (brake band)TM-220
10. Input clutchTM-254
11. Gear systemTM-220
12. High and low reverse clutchTM-264
42Slips at lock-up. ON vehicle1. Fluid level and state
TM-178
2. Line pressure testTM-187
3. Engine speed signal TM-51
4. Input speed sensorTM-46
5. Torque converter clutch solenoid valveTM-63
6. CAN communication line LAN-4
7. Control valve with TCMTM-201
OFF vehicle8. Torque converter
TM-2329. Oil pump assemblyTM-250
43No creep at all.
Refer to
TM-123, "
Ve-
hicle Does Not Creep
Backward in "R" Posi-
tion", TM-125, "Veh i-
cle Does Not Creep
Forward in "D" Posi-
tion"
ON vehicle 1. Fluid level and state
TM-178
2. Line pressure testTM-187
3. Accelerator pedal position sensor TM-69
4. Direct clutch solenoid valveTM-84
5. Transmission range switchTM-43
6. CAN communication line LAN-4
7. Control cable adjustmentTM-194
8. Control valve with TCMTM-201
OFF vehicle9. Torque converter
TM-232
10. Oil pump assemblyTM-250
11. 1st one-way clutchTM-259
12. Gear systemTM-220
13. Reverse brakeTM-232
14. Direct clutchTM-266
15. Forward one- way clutch (Parts behind drum support is
impossible to perform inspection by disassembly. Refer to
TM-8
, TM-9
TM-232
16. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to TM-8
, TM-9TM-232
No. Items Symptom Condition Diagnostic ItemReference
page
Revision: March 2010 2008 QX56

TM-168
< SYMPTOM DIAGNOSIS >
SYSTEM SYMPTOM
44Slips/Will
Not En-
gage Vehicle cannot run in
all positions.
ON vehicle1. Fluid level and state
TM-178
2. Line pressure testTM-187
3. Transmission range switch TM-43
4. Control cable adjustmentTM-194
5. Control valve with TCMTM-201
OFF vehicle6. Oil pump assembly
TM-2507. Gear systemTM-220
8. Output shaftTM-232
45With selector lever in
“D” position, driving is
not possible. ON vehicle
1. Fluid level and state
TM-178
2. Line pressure testTM-187
3. Transmission range switch TM-43
4. Control cable adjustmentTM-194
5. Control valve with TCMTM-201
OFF vehicle6. Torque converter
TM-232
7. Oil pump assembly TM-250
8. 1st one-way clutchTM-259
9. Gear systemTM-220
10. Reverse brakeTM-232
11. Forward one- way clutch (Parts behind drum support is
impossible to perform inspection by disassembly. Refer to
TM-8
, TM-9
TM-232
12. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to TM-8
, TM-9TM-232
46 With selector lever in
“R” position, driving is
not possible. ON vehicle
1. Fluid level and state
TM-178
2. Line pressure testTM-187
3. Transmission range switch TM-43
4. Control cable adjustmentTM-194
5. Control valve with TCMTM-201
OFF vehicle6. Gear system
TM-2207. Output shaftTM-232
8. Reverse brakeTM-232
47 OthersShift point is high in
“D” position. ON vehicle1. Output speed sensor and vehicle speed sensor
TM-48
,
TM-74
2. Accelerator pedal position sensor TM-69
3. CAN communication line LAN-4
4. ATF temperature sensorTM-71
5. Control valve with TCMTM-201
No. ItemsSymptom Condition Diagnostic ItemReference
page
Revision: March 2010 2008 QX56

SYSTEM SYMPTOMTM-169
< SYMPTOM DIAGNOSIS >
CEF
G H
I
J
K L
M A
B
TM
N
O P
48
Others Shift point is low in “D”
position.
ON vehicle1. Output speed sensor and vehicle speed sensor
TM-48
,
TM-74
2. Accelerator pedal position sensor TM-69
3. CAN communication line LAN-4
4. Control valve with TCMTM-201
49Judder occurs during
lock-up. ON vehicle1. Fluid level and state
TM-178
2. Engine speed signal TM-51
3. Input speed sensorTM-46
4. Output speed sensor and vehicle speed sensorTM-48,
TM-74
5. Accelerator pedal position sensor TM-69
6. CAN communication line LAN-4
7. Torque converter clutch solenoid valveTM-63
8. Control valve with TCMTM-201
OFF vehicle 9. Torque converter TM-232
50Strange noise in “R”
position. ON vehicle
1. Fluid level and state
TM-178
2. Engine speed signal TM-51
3. CAN communication line LAN-4
4. Control valve with TCMTM-201
OFF vehicle5. Torque converter
TM-232
6. Oil pump assemblyTM-250
7. Gear systemTM-220
8. High and low reverse clutchTM-264
9. Reverse brakeTM-232
51Strange noise in “N”
position. ON vehicle
1. Fluid level and state
TM-178
2. Engine speed signal TM-51
3. CAN communication line LAN-4
4. Control valve with TCMTM-201
OFF vehicle5. Torque converter
TM-2326. Oil pump assemblyTM-250
7. Gear systemTM-220
52Strange noise in “D”
position. ON vehicle
1. Fluid level and state
TM-178
2. Engine speed signal TM-51
3. CAN communication line LAN-4
4. Control valve with TCMTM-201
OFF vehicle5. Torque converter
TM-232
6. Oil pump assemblyTM-250
7. Gear systemTM-220
8. Forward brake (Parts behind drum support is impossible to
perform inspection by disassembly. Refer to TM-8
, TM-9TM-232
No. Items Symptom Condition Diagnostic ItemReference
page
Revision: March 2010 2008 QX56

TM-170
< SYMPTOM DIAGNOSIS >
SYSTEM SYMPTOM
53Others Vehicle dose not de-
celerate by engine
brake.
Refer to TM-149, "Ve -
hicle Does Not Decel-
erate By Engine
Brake".
ON vehicle
1. Transmission range switch
TM-43
2. Fluid level and stateTM-178
3. Control cable adjustmentTM-194
4. 1st position switchTM-149
5. CAN communication line LAN-4
6. Control valve with TCMTM-201
OFF vehicle7. Input clutch
TM-2548. High and low reverse clutchTM-264
9. Direct clutchTM-266
54Engine brake does not
operate in “2” position. ON vehicle1. Transmission range switch
TM-43
2. Fluid level and stateTM-178
3. Control cable adjustmentTM-194
5. CAN communication line LAN-4
6. Control valve with TCMTM-201
OFF vehicle7. Front brake (brake band)
TM-2208. Input clutchTM-254
9. High and low reverse clutchTM-264
55Engine brake does not
operate in “1” position. ON vehicle1. Transmission range switch
TM-43
2. Fluid level and stateTM-178
3. Control cable adjustmentTM-194
4. 1st position switchTM-149
5. CAN communication line LAN-4
6. Control valve with TCMTM-201
OFF vehicle7. Input clutch
TM-2548. High and low reverse clutchTM-264
9. Direct clutchTM-266
No. ItemsSymptom Condition Diagnostic ItemReference
page
Revision: March 2010 2008 QX56

SYSTEM SYMPTOMTM-171
< SYMPTOM DIAGNOSIS >
CEF
G H
I
J
K L
M A
B
TM
N
O P
56
Others Maximum speed low.
ON vehicle
1. Fluid level and state
TM-178
2. Line pressure testTM-187
3. Accelerator pedal position sensor TM-69
4. CAN communication line LAN-4
5. Direct clutch solenoid valveTM-84
6. Control valve with TCMTM-201
OFF vehicle7. Torque converter
TM-232
8. Oil pump assemblyTM-250
9. Input clutchTM-254
10. Gear systemTM-220
11. High and low reverse clutchTM-264
12. Direct clutchTM-266
13. Forward one- way clutch (Parts behind drum support is
impossible to perform inspection by disassembly. Refer to
TM-8
, TM-9
TM-232
14 Forward brake (Parts behind drum support is impossible to
perform inspection by disassembly. Refer to TM-8
, TM-9TM-232
57 Extremely large creep. ON vehicle1. Engine idle speed
EC-172. CAN communication lineLAN-4
OFF vehicle 3. Torque converter TM-232
58With selector lever in
“P” position, vehicle
does not enter parking
condition or, with se-
lector lever in another
position, parking con-
dition is not cancelled.
Refer to
TM-119, "
In
"P" Position, Vehicle
Moves When
Pushed". ON vehicle
1. Transmission range switch
TM-43
2. Control cable adjustmentTM-194
OFF vehicle 3. Parking pawl components TM-220
59Vehicle runs with
transmission in “P” po-
sition. ON vehicle1. Transmission range switch
TM-43
2. Fluid level and stateTM-178
3. Control cable adjustmentTM-194
4. Control valve with TCMTM-201
5. Parking pawl componentsTM-220
OFF vehicle 6. Gear system TM-220
No. ItemsSymptom Condition Diagnostic ItemReference
page
Revision: March 2010 2008 QX56

TM-172
< SYMPTOM DIAGNOSIS >
SYSTEM SYMPTOM
60Others Vehicle runs with
transmission in “N” po-
sition.
Refer to TM-119, "In
"N" Position, Vehicle
Moves".
ON vehicle
1. Transmission range switch
TM-43
2. Fluid level and stateTM-178
3. Control cable adjustmentTM-194
4. Control valve with TCMTM-201
OFF vehicle5. Input clutch
TM-254
6. Gear systemTM-220
7. Direct clutchTM-266
8. Reverse brakeTM-232
9. Forward one- way clutch (Parts behind drum support is im-
possible to perform inspection by disassembly. Refer to TM-
8, TM-9
TM-232
10. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to TM-8
, TM-9TM-232
61 Engine does not start
in “N” or “P” position.
Refer to TM-118, "En-
gine Cannot Be Start-
ed in "P" or "N"
Position".ON vehicle1. Ignition switch and starter
2. Control cable adjustment
TM-194
3. Transmission range switch TM-43
62Engine starts in posi-
tions other than “N” or
“P”.
ON vehicle1. Ignition switch and starter
2. Control cable adjustment
TM-194
3. Transmission range switch TM-43
63Engine stall. ON vehicle1. Fluid level and state
TM-178
2. Engine speed signal TM-51
3. Input speed sensorTM-46
4. Torque converter clutch solenoid valveTM-63
5. CAN communication line LAN-4
6. Control valve with TCMTM-201
OFF vehicle 7. Torque converter TM-232
64Engine stalls when se-
lect lever shifted “N”
→
“D”, “R”. ON vehicle1. Fluid level and state
TM-178
2. Engine speed signal TM-51
3. Input speed sensorTM-46
4. Torque converter clutch solenoid valveTM-63
5. CAN communication line LAN-4
6. Control valve with TCMTM-201
OFF vehicle 7. Torque converter TM-232
65 OthersEngine speed does
not return to idle.
Refer to TM-141, "En-
gine Speed Does Not
Return to Idle".ON vehicle 1. Fluid level and state
TM-178
2. Direct clutch solenoid valve TM-84
3. Front brake solenoid valveTM-82
4. Accelerator pedal position sensorTM-69
5. Output speed sensor and vehicle speed sensor signalTM-48,
TM-74
6. CAN communication line LAN-4
7. Control valve with TCMTM-201
OFF vehicle8. Front brake (brake band)
TM-2209. Direct clutchTM-266
No. ItemsSymptom Condition Diagnostic ItemReference
page
Revision: March 2010 2008 QX56

PRECAUTIONSTM-173
< PRECAUTION >
CEF
G H
I
J
K L
M A
B
TM
N
O P
PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000006054118
The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along
with a front seat belt, helps to reduce the risk or severi ty of injury to the driver and front passenger for certain
types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front
air bag, depending on the severity of a collision and w hether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the SR and SB section of this Service Man-
ual.
WARNING:
• To avoid rendering the SRS inoper ative, which could increase the risk of personal injury or death in
the event of a collision which would result in air bag inflation, all maintenance must be performed by
an authorized NISSAN/INFINITI dealer.
• Improper maintenance, including in correct removal and installation of the SRS, can lead to personal
injury caused by unintentional act ivation of the system. For removal of Spiral Cable and Air Bag
Module, see the SR section.
• Do not use electrical test equipm ent on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identi fied by yellow and/or orange harnesses or har-
ness connectors.
PRECAUTIONS WHEN USING POWER TOOLS (AIR OR ELECTRIC) AND HAMMERS
WARNING:
• When working near the Airbag Diagnosis Sensor Un it or other Airbag System sensors with the Igni-
tion ON or engine running, DO NOT use air or el ectric power tools or strike near the sensor(s) with a
hammer. Heavy vibration could activate the sensor( s) and deploy the air bag(s), possibly causing
serious injury.
• When using air or electric power tools or hammers, always switch the Ignition OFF, disconnect the battery, and wait at least 3 minutes before performing any service.
Precaution Necessary for Steering Wheel Rotation After Battery Disconnect
INFOID:0000000004857582
NOTE:
• This Procedure is applied only to models with Intelligent Key system and NATS (NISSAN ANTI-THEFT SYS-
TEM).
• Remove and install all control units after disconnecti ng both battery cables with the ignition knob in the
″ LOCK ″ position.
• Always use CONSULT-III to perform self-diagnosis as a part of each function inspection after finishing work.
If DTC is detected, perform trouble diagnosis according to self-diagnostic results.
For models equipped with the Intelligent Key system and NATS , an electrically controlled steering lock mech-
anism is adopted on the key cylinder.
For this reason, if the battery is disconnected or if the battery is discharged, the steering wheel will lock and
steering wheel rotation will become impossible.
If steering wheel rotation is required when battery power is interrupted, follow the procedure below before
starting the repair operation.
OPERATION PROCEDURE
1. Connect both battery cables. NOTE:
Supply power using jumper cables if battery is discharged.
2. Use the Intelligent Key or mechanical key to turn the ignition switch to the ″ACC ″ position. At this time, the
steering lock will be released.
3. Disconnect both battery cables. The steering lock will remain released and the steering wheel can be
rotated.
4. Perform the necessary repair operation.
Revision: March 2010 2008 QX56