INFINITI QX56 2010 Factory Service Manual

TM-136
< SYMPTOM DIAGNOSIS >
SYSTEM SYMPTOM
41Slips/Will
Not En-
gage While accelerating in
5th, engine races or
slippage occurs.
ON vehicle
1. Fluid level and state
TM-148
2. Line pressure testTM-157
3. Accelerator pedal position sensor TM-71
4. CAN communication line LAN-4
5. Front brake solenoid valveTM-84
6. Control valve with TCMTM-172
OFF vehicle7. Torque converter
TM-172
8. Oil pump assemblyTM-172
9. Front brake (brake band)TM-172
10. Input clutchTM-172
11. Gear systemTM-172
12. High and low reverse clutchTM-172
42Slips at lock-up. ON vehicle1. Fluid level and state
TM-148
2. Line pressure testTM-157
3. Engine speed signal TM-53
4. Input speed sensorTM-48
5. Torque converter clutch solenoid valveTM-65
6. CAN communication line LAN-4
7. Control valve with TCMTM-172
OFF vehicle8. Torque converter
TM-1729. Oil pump assemblyTM-172
43No creep at all. ON vehicle
1. Fluid level and state
TM-148
2. Line pressure testTM-157
3. Accelerator pedal position sensor TM-71
4. Direct clutch solenoid valveTM-86
5. Transmission range switchTM-45
6. CAN communication line LAN-4
7. Control cable adjustmentTM-164
8. Control valve with TCMTM-172
OFF vehicle9. Torque converter
TM-172
10. Oil pump assemblyTM-172
11. 1st one-way clutchTM-172
12. Gear systemTM-172
13. Reverse brakeTM-172
14. Direct clutchTM-172
15. Forward one- way clutch (Parts behind drum support is
impossible to perform inspection by disassembly. Refer to
TM-8
, TM-9. TM-172
16. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to
TM-8
, TM-9. TM-172
No. Items
Symptom Condition Diagnostic ItemReference
page
Revision: April 20092010 QX56

SYSTEM SYMPTOMTM-137
< SYMPTOM DIAGNOSIS >
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44
Slips/Will
Not En-
gage Vehicle cannot run in
all positions.
ON vehicle1. Fluid level and state
TM-148
2. Line pressure testTM-157
3. Transmission range switch TM-45
4. Control cable adjustmentTM-164
5. Control valve with TCMTM-172
OFF vehicle6. Oil pump assembly
TM-1727. Gear systemTM-172
8. Output shaftTM-172
45With selector lever in
“D” position, driving is
not possible. ON vehicle
1. Fluid level and state
TM-148
2. Line pressure testTM-157
3. Transmission range switch TM-45
4. Control cable adjustmentTM-164
5. Control valve with TCMTM-172
OFF vehicle6. Torque converter
TM-172
7. Oil pump assembly TM-172
8. 1st one-way clutchTM-172
9. Gear systemTM-172
10. Reverse brakeTM-172
11. Forward one- way clutch (Parts behind drum support is
impossible to perform inspection by disassembly. Refer to
TM-8
, TM-9.TM-172
12. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to
TM-8
, TM-9. TM-172
46 With selector lever in
“R” position, driving is
not possible. ON vehicle
1. Fluid level and state
TM-148
2. Line pressure testTM-157
3. Transmission range switch TM-45
4. Control cable adjustmentTM-164
5. Control valve with TCMTM-172
OFF vehicle6. Gear system
TM-1727. Output shaftTM-172
8. Reverse brakeTM-172
47 OthersShift point is high in
“D” position. ON vehicle1. Output speed sensor and vehicle speed signal
TM-50
,
TM-76
2. Accelerator pedal position sensor TM-71
3. CAN communication line LAN-4
4. ATF temperature sensorTM-73
5. Control valve with TCMTM-172
No. ItemsSymptom Condition Diagnostic ItemReference
page
Revision: April 20092010 QX56

TM-138
< SYMPTOM DIAGNOSIS >
SYSTEM SYMPTOM
48Others Shift point is low in “D”
position.
ON vehicle1. Output speed sensor and vehicle speed signal
TM-50
,
TM-76
2. Accelerator pedal position sensor TM-71
3. CAN communication line LAN-4
4. Control valve with TCMTM-172
49Judder occurs during
lock-up. ON vehicle1. Fluid level and state
TM-148
2. Engine speed signal TM-53
3. Input speed sensorTM-48
4. Output speed sensor and vehicle speed signalTM-50,
TM-76
5. Accelerator pedal position sensor TM-71
6. CAN communication line LAN-4
7. Torque converter clutch solenoid valveTM-65
8. Control valve with TCMTM-172
OFF vehicle 9. Torque converter TM-172
50Strange noise in “R”
position. ON vehicle
1. Fluid level and state
TM-148
2. Engine speed signal TM-53
3. CAN communication line LAN-4
4. Control valve with TCMTM-172
OFF vehicle5. Torque converter
TM-172
6. Oil pump assemblyTM-172
7. Gear systemTM-172
8. High and low reverse clutchTM-237
9. Reverse brakeTM-172
51Strange noise in “N”
position. ON vehicle
1. Fluid level and state
TM-148
2. Engine speed signal TM-53
3. CAN communication line LAN-4
4. Control valve with TCMTM-172
OFF vehicle5. Torque converter
TM-1726. Oil pump assemblyTM-172
7. Gear systemTM-172
52Strange noise in “D”
position. ON vehicle
1. Fluid level and state
TM-148
2. Engine speed signal TM-53
3. CAN communication line LAN-4
4. Control valve with TCMTM-172
OFF vehicle5. Torque converter
TM-172
6. Oil pump assemblyTM-172
7. Gear systemTM-172
8. Forward brake (Parts behind drum support is impossible to
perform inspection by disassembly. Refer to TM-8
, TM-9. TM-172
No. Items
Symptom Condition Diagnostic ItemReference
page
Revision: April 20092010 QX56

SYSTEM SYMPTOMTM-139
< SYMPTOM DIAGNOSIS >
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53
Others Vehicle dose not de-
celerate by engine
brake.
ON vehicle1. Transmission range switch
TM-45
2. Fluid level and stateTM-148
3. Control cable adjustmentTM-164
4. 1st position switchTM-108
5. CAN communication line LAN-4
6. Control valve with TCMTM-172
OFF vehicle7. Input clutch
TM-1728. High and low reverse clutchTM-172
9. Direct clutchTM-172
54Engine brake does not
operate in “2” position. ON vehicle1. Transmission range switch
TM-45
2. Fluid level and stateTM-148
3. Control cable adjustmentTM-164
5. CAN communication line LAN-4
6. Control valve with TCMTM-172
OFF vehicle7. Front brake (brake band)
TM-1728. Input clutchTM-172
9. High and low reverse clutchTM-172
55Engine brake does not
operate in “1” position. ON vehicle1. Transmission range switch
TM-45
2. Fluid level and stateTM-148
3. Control cable adjustmentTM-164
4. 1st position switchTM-108
5. CAN communication line LAN-4
6. Control valve with TCMTM-172
OFF vehicle7. Input clutch
TM-1728. High and low reverse clutchTM-172
9. Direct clutchTM-172
No. ItemsSymptom Condition Diagnostic ItemReference
page
Revision: April 20092010 QX56

TM-140
< SYMPTOM DIAGNOSIS >
SYSTEM SYMPTOM
56Others Maximum speed low.
ON vehicle
1. Fluid level and state
TM-148
2. Line pressure testTM-157
3. Accelerator pedal position sensor TM-71
4. CAN communication line LAN-4
5. Direct clutch solenoid valveTM-86
6. Control valve with TCMTM-172
OFF vehicle7. Torque converter
TM-172
8. Oil pump assemblyTM-172
9. Input clutchTM-172
10. Gear systemTM-172
11. High and low reverse clutchTM-172
12. Direct clutchTM-172
13. Forward one- way clutch (Parts behind drum support is
impossible to perform inspection by disassembly. Refer to
TM-8
, TM-9. TM-172
14 Forward brake (Parts behind drum support is impossible to
perform inspection by disassembly. Refer to TM-8
,
TM-9. TM-172
57
Extremely large creep. ON vehicle1. Engine idle speed
EC-172. CAN communication lineLAN-4
OFF vehicle 3. Torque converter TM-172
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. ON vehicle
1. Transmission range switch
TM-45
2. Control cable adjustmentTM-164
OFF vehicle 3. Parking pawl components TM-172
59Vehicle runs with
transmission in “P” po-
sition. ON vehicle1. Transmission range switch
TM-45
2. Fluid level and stateTM-148
3. Control cable adjustmentTM-164
4. Control valve with TCMTM-172
5. Parking pawl componentsTM-172
OFF vehicle 6. Gear system TM-172
No. ItemsSymptom Condition Diagnostic ItemReference
page
Revision: April 20092010 QX56

SYSTEM SYMPTOMTM-141
< SYMPTOM DIAGNOSIS >
CEF
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TM
N
O P
60
Others Vehicle runs with
transmission in “N” po-
sition.
ON vehicle
1. Transmission range switch
TM-45
2. Fluid level and stateTM-148
3. Control cable adjustmentTM-164
4. Control valve with TCMTM-172
OFF vehicle5. Input clutch
TM-172
6. Gear systemTM-172
7. Direct clutchTM-172
8. Reverse brakeTM-172
9. Forward one- way clutch (Parts behind drum support is im-
possible to perform inspection by disassembly. Refer to TM-
8, TM-9. TM-172
10. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to
TM-8
, TM-9. TM-172
61 Engine does not start
in “N” or “P” position. ON vehicle1. Ignition switch and starter
2. Control cable adjustment
TM-164
3. Transmission range switch TM-45
62Engine starts in posi-
tions other than “N” or
“P”. ON vehicle1. Ignition switch and starter
2. Control cable adjustment
TM-164
3. Transmission range switch TM-45
63Engine stall. ON vehicle1. Fluid level and state
TM-148
2. Engine speed signal TM-53
3. Input speed sensorTM-48
4. Torque converter clutch solenoid valveTM-65
5. CAN communication line LAN-4
6. Control valve with TCMTM-172
OFF vehicle 7. Torque converter TM-172
64Engine stalls when se-
lect lever shifted “N”
→
“D”, “R”. ON vehicle1. Fluid level and state
TM-148
2. Engine speed signal TM-53
3. Input speed sensorTM-48
4. Torque converter clutch solenoid valveTM-65
5. CAN communication line LAN-4
6. Control valve with TCMTM-172
OFF vehicle 7. Torque converter TM-172
No. ItemsSymptom Condition Diagnostic ItemReference
page
Revision: April 20092010 QX56

TM-142
< SYMPTOM DIAGNOSIS >
SYSTEM SYMPTOM
65Others Engine speed does
not return to idle.
ON vehicle1. Fluid level and state
TM-148
2. Direct clutch solenoid valve TM-86
3. Front brake solenoid valveTM-84
4. Accelerator pedal position sensorTM-71
5. Output speed sensor and vehicle speed signalTM-50,
TM-76
6. CAN communication line LAN-4
7. Control valve with TCMTM-172
OFF vehicle8. Front brake (brake band)
TM-1729. Direct clutchTM-172
66A/T CHECK indicator
lamp does not come
on. ON vehicle1. CAN communication line
LAN-42. Combination meterMWI-22
3. TCM power supply TM-94
No. ItemsSymptom Condition Diagnostic ItemReference
page
Revision: April 20092010 QX56

PRECAUTIONSTM-143
< PRECAUTION >
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PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000005148716
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.
Precaution for On Board Diagnosis (OBD) System of A/T and EngineINFOID:0000000005148717
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, sen sors, 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 the harnesses properly after work. Interference of the harness with a
bracket, etc. May cause the MIL to li ght 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:0000000005148718
NOTE:
If any malfunctions occur in th e RE5R05A model transmission, repl ace 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”.
SEF289H
Revision: April 20092010 QX56

TM-144
< PRECAUTION >
PRECAUTIONS
•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-13, "
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.
• All parts should be carefully cleaned with a general purpose, non-flammable solvent before inspection or
reassembly.
• Gaskets, seals and O-rings should be replaced any time the transmission is disassembled.
• It is very important to perform functional tests whenever they are indicated.
• The valve body contains precision parts and requires extreme care when parts are removed and serviced. Place disassembled valve body parts in order for easier and proper assembly. Care will also prevent springs
and small parts from becoming scattered or lost.
• Properly installed valves, sleeves, plugs, etc. will slide along bores in valve body under their own weight.
• Before assembly, apply a coat of recommended ATF to all parts. Apply petroleum jelly to protect O-rings and
seals, or hold bearings and washers in place during assembly. Do not use grease.
• Extreme care should be taken to avoid damage to O-rings, seals and gaskets when assembling.
• Clean or replace ATF cooler if excessive foreign material is found in oil pan or clogging strainer. Refer to TM-
152, "A/T Fluid Cooler Cleaning".
• After overhaul, refill the transmission with new ATF.
• When the A/T drain plug is removed, only some of the fluid is drained. Old A/T fluid will remain in torque con- verter and ATF cooling system.
Always follow the procedures under “Changing A/T Fluid” in the AT section when changing A/T fluid. Refer to
TM-150, "
Changing the A/T Fluid (ATF)", TM-148, "Checking the A/T Fluid (ATF)".
Service Notice or PrecautionINFOID:0000000005148719
ATF COOLER SERVICE
• If A/T fluid contains fictional material (clutches, bands, etc.), or if an A/T is repaired, overhauled, or replaced,
inspect and clean the A/T fluid cooler mounted in the radiator or replace the radiator. Flush cooler lines with
cleaning solvent and compressed air after repair. For A/T fluid cooler cleaning procedure, refer to TM-152,
"A/T Fluid Cooler Cleaning". For radiator replacement, refer to CO-15, "Removal and Installation".
CHECKING AND CHANGING A/T FLUID
• Increase ATF oil temperature to 80 °C (176° F) first, then check and adjust oil level at 65 °C (149° F).
NOTE:
The A/T has both water cooling and air cooling systems . The air cooling system has a bypass valve. When
ATF oil temperature is at or below 50 °C (122° F), it does not flow through the air cooled system. If A/T oil
level is adjusted without flow throughout the entire system, the level will be 10mm lower than required.
Therefore, all piping should be filled with oil when adjusting level.
OBD-II SELF-DIAGNOSIS
• A/T self-diagnosis is performed by the TCM in combination with the ECM. Refer to the table on TM-32,
"CONSULT-III Function (TRANSMISSION)" for the indicator used to display each self-diagnostic result.
• The self-diagnostic results indicated by the MIL ar e automatically stored in both the ECM and TCM memo-
ries.
SEF217U
Revision: April 20092010 QX56

PRECAUTIONSTM-145
< PRECAUTION >
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Always perform the procedure on TM-30, "OBD-II Diagnostic Trouble Code (DTC)" to complete the
repair and avoid unnecessary blinking of the MIL.
For details of OBD-II, refer to TM-30
.
• Certain systems and components, especially those related to OBD, may use the new style slide-
locking type harness connector. For descrip tion and how to disconnect, refer to PG-64
.
Revision: April 20092010 QX56