2008 INFINITI QX56 lock

TM-140
< SYMPTOM DIAGNOSIS >
SYSTEM SYMPTOM
Check A/T fluid level. Refer to TM-178, "Checking the A/T Fluid
(ATF)".
OK or NG
OK >> GO TO 3.
NG >> Refill ATF.
3.CHECK A/T FLUID CONDITION
1. Remove oil pan. Refer to TM-199, "
Oil Pan".
2. Check A/T fluid condition. Refer to TM-178, "
Checking the A/T
Fluid (ATF)".
OK or NG
OK >> GO TO 4.
NG >> GO TO 7.
4.DETECT MALFUNCTIONING ITEM
• Check the malfunction items. If any items are dam aged, repair or replace damaged parts. Refer to TM-151,
"Symptom Table" (Symptom No.25).
OK or NG
OK >> GO TO 5.
NG >> Repair or replace damaged parts.
5.CHECK SYMPTOM
Check again. Refer to TM-190, "
Cruise Test - Part 1".
OK or NG
OK >> INSPECTION END
NG >> GO TO 6.
6.PERFORM TCM INSPECTION
1. Perform TCM input/output signals inspection. Refer to TM-103, "
Reference Value".
2. If NG, recheck A/T assembly harness connector terminals for damage or loose connection with harness
connector.
OK or NG
OK >> INSPECTION END
NG >> Repair or replace damaged parts.
7.DETECT MALFUNCTIONING ITEM
• Check the malfunction items. If any items are dam aged, repair or replace damaged parts. Refer to TM-151,
"Symptom Table" (Symptom No.25).
OK or NG
OK >> GO TO 5.
NG >> Repair or replace damaged parts.
Lock-up Is Not ReleasedINFOID:0000000001604193
SYMPTOM:
The lock-up condition cannot be cancelled even after releasing the accelerator pedal.
SAT638A
SCIA5199E
Revision: March 2010 2008 QX56

TM-154
< SYMPTOM DIAGNOSIS >
SYSTEM SYMPTOM
7Shift
Shock Shock is too large for
upshift when accelera-
tor pedal is released.
ON vehicle1. Accelerator pedal position sensor
TM-69
2. Control cable adjustmentTM-194
3. Engine speed signal TM-51
4. CAN communication line LAN-4
5. Input speed sensorTM-46
6. Output speed sensor and vehicle speed sensor TM-48,
TM-74
7. Fluid level and state TM-178
8. Control valve with TCMTM-201
OFF vehicle9. Front brake (brake band)
TM-22010. Input clutchTM-254
11. High and low reverse clutchTM-264
12. Direct clutchTM-266
8Shock is too large for
lock-up. ON vehicle1. Accelerator pedal position sensor
TM-69
2. Control cable adjustmentTM-194
3. Engine speed signal TM-51
4. CAN communication line LAN-4
5. Input speed sensorTM-46
6. Output speed sensor and vehicle speed sensor TM-48,
TM-74
7. Torque converter clutch solenoid valve TM-63
8. Fluid level and stateTM-178
9. Control valve with TCMTM-201
OFF vehicle 10. Torque converter TM-232
9Shock is too large dur-
ing engine brake. ON vehicle
1. Accelerator pedal position sensor
TM-69
2. Control cable adjustmentTM-194
3. CAN communication line LAN-4
4. Fluid level and stateTM-178
5. Control valve with TCMTM-201
OFF vehicle6. Front brake (brake band)
TM-2207. Input clutchTM-254
8. High and low reverse clutchTM-264
9. Direct clutchTM-266
No. ItemsSymptom Condition Diagnostic ItemReference
page
Revision: March 2010 2008 QX56

SYSTEM SYMPTOMTM-159
< SYMPTOM DIAGNOSIS >
CEF
G H
I
J
K L
M A
B
TM
N
O P
22
Slips/Will
Not En-
gage When “D” position, re-
mains in 5GR.
ON vehicle1. Fluid level and state
TM-178
2. Output speed sensor and vehicle speed sensor TM-48,
TM-74
3. Front brake solenoid valve TM-82
4. Line pressure testTM-187
5. CAN communication line LAN-4
6. Control valve with TCMTM-201
OFF vehicle7. Front brake (brake band)
TM-2208. Input clutchTM-254
9. Gear systemTM-220
10. High and low reverse clutchTM-264
23Vehicle cannot be
started from D
1.
Refer to TM-128, "
Ve-
hicle Cannot Be Start-
ed from D1". ON vehicle
1. Fluid level and state
TM-178
2. Accelerator pedal position sensor TM-69
3. Line pressure testTM-187
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 im-
possible 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
24 Does not lock-up.
Refer to
TM-137, "A/T
Does Not Perform
Lock-up"
ON vehicle 1. 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
No. ItemsSymptom Condition Diagnostic ItemReference
page
Revision: March 2010 2008 QX56

TM-160
< SYMPTOM DIAGNOSIS >
SYSTEM SYMPTOM
25Slips/Will
Not en-
gage Does not hold lock-up
condition.
Refer to TM-139, "A/T
Does Not Hold Lock-
up Condition".
ON vehicle 1. 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
26Lock-up is not re-
leased.
Refer to TM-140,
"Lock-up Is Not Re-
leased".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
27No shock at all or the
clutch slips when vehi-
cle changes speed D1
→ D2. 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. 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

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

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

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

TM-174
< PRECAUTION >
PRECAUTIONS
5. When the repair work is completed, return the ignition switch to the ″LOCK ″ position before connecting
the battery cables. (At this time, the steering lock mechanism will engage.)
6. Perform a self-diagnosis check of a ll control units using CONSULT-III.
Precaution for On Board Diagnosis (OBD) System of A/T and EngineINFOID:0000000001531485
The ECM has an on board diagnostic system. It will light up the malfunction indicator lamp (MIL) to warn the
driver of a malfunction causing emission deterioration.
CAUTION:
• Be sure to turn the ignition switch “OFF” and disconnect the negative battery cable before any repair
or inspection work. The open/short circuit of related switches, sensors, solenoid valves, etc. Will
cause the MIL to light up.
• Be sure to connect and lock the connectors secure ly after work. A loose (unlocked) connector will
cause the MIL to light up due to an open circuit. (Be sure the connector is free from water, grease,
dirt, bent terminals, etc.)
• Be sure to route and secure th e harnesses properly after work. Interference of the harness with a
bracket, etc. May cause the MIL to light up due to a short circuit.
• Be sure to connect rubber tubes properly afte r work. A misconnected or disconnected rubber tube
may cause the MIL to light up due to a malfunction of the EGR system or fuel injection system, etc.
• Be sure to erase the unnecessary malfunction informa tion (repairs completed) from the TCM and
ECM before returning the vehicle to the customer.
PrecautionINFOID:0000000001531486
NOTE:
If any malfunctions occur in the RE5R05A model tr ansmission, replace the entire transmission assem-
bly.
• Before connecting or disconn ecting the TCM harness connec-
tor, turn ignition switch “O FF” and disconnect negative bat-
tery cable. Because battery voltage is applied to TCM even if
ignition switch is turned “OFF”.
• After performing each TROUBLE DIAGNOSIS, perform “DTC
(Diagnostic Trouble Code) CONFIRMATION PROCEDURE”.
If the repair is completed the DTC should not be displayed in the
“DTC CONFIRMATION PROCEDURE”.
• Always use the specified brand of ATF. Refer to MA-12, "
Fluids and Lubricants".
• Use paper rags not cloth rags during work.
• After replacing the ATF, dispose of the waste oil using the methods prescribed by law, ordinance, etc.
• Before proceeding with disassembly, thoroughly clean the outside of the transmission. It is important to pre- vent the internal parts from becoming cont aminated by dirt or other foreign matter.
• Disassembly should be done in a clean work area.
• Use lint-free cloth or towels for wiping parts clean. Common shop rags can leave fibers that could interfere
with the operation of the transmission.
• Place disassembled parts in order for easier and proper assembly.
SEF289H
SEF217U
Revision: March 2010 2008 QX56