2008 INFINITI QX56 Factory Service Manual

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Page 3713 of 4083

INFINITI QX56 2008 Factory Service Manual 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-

Page 3714 of 4083

INFINITI QX56 2008 Factory Service Manual SYSTEM SYMPTOMTM-167
< SYMPTOM DIAGNOSIS >
CEF
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M A
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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

Page 3715 of 4083

INFINITI QX56 2008 Factory Service Manual 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

Page 3716 of 4083

INFINITI QX56 2008 Factory Service Manual SYSTEM SYMPTOMTM-169
< SYMPTOM DIAGNOSIS >
CEF
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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.

Page 3717 of 4083

INFINITI QX56 2008 Factory Service Manual 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 ra

Page 3718 of 4083

INFINITI QX56 2008 Factory Service Manual SYSTEM SYMPTOMTM-171
< SYMPTOM DIAGNOSIS >
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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 posit

Page 3719 of 4083

INFINITI QX56 2008 Factory Service Manual 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-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

Page 3720 of 4083

INFINITI QX56 2008 Factory Service Manual PRECAUTIONSTM-173
< PRECAUTION >
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PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000006054

PRECAUTIONSTM-173
< PRECAUTION >
CEF
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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

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