2009 INFINITI QX56 transmission

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Page 3814 of 4171

INFINITI QX56 2009 Factory Service Manual
TM-166
< SYMPTOM DIAGNOSIS >
SYSTEM SYMPTOM
36Slips/Will
Not En-
gage With selector lever in
“R” position
, accelera-
tion is extremely poor. ON vehicle1. Fluid level and state
TM-179
2. Line p

Page 3816 of 4171

INFINITI QX56 2009 Factory Service Manual
TM-168
< 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-179
2. Line pressure testT

Page 3817 of 4171

INFINITI QX56 2009 Factory Service Manual
SYSTEM SYMPTOMTM-169
< SYMPTOM DIAGNOSIS >
CEF
G H
I
J
K L
M A
B
TM
N
O P
44
Slips/Will
Not En-
gage Vehicle cannot run in
all positions.
ON vehicle1. Fluid level and state
TM-179
2. Line pressure

Page 3819 of 4171

INFINITI QX56 2009 Factory Service Manual
SYSTEM SYMPTOMTM-171
< SYMPTOM DIAGNOSIS >
CEF
G H
I
J
K L
M A
B
TM
N
O P
53
Others Vehicle dose not de-
celerate by engine
brake.
Refer to
TM-150, "Ve-
hicle Does Not Decel-
erate By Engine
Brake

Page 3820 of 4171

INFINITI QX56 2009 Factory Service Manual
TM-172
< SYMPTOM DIAGNOSIS >
SYSTEM SYMPTOM
56Others Maximum speed low.
ON vehicle
1. Fluid level and state
TM-179
2. Line pressure testTM-188
3. Accelerator pedal position sensor TM-70
4. CAN commun

Page 3821 of 4171

INFINITI QX56 2009 Factory Service Manual
SYSTEM SYMPTOMTM-173
< SYMPTOM DIAGNOSIS >
CEF
G H
I
J
K L
M A
B
TM
N
O P
60
Others Vehicle runs with
transmission in “N” po-
sition.
Refer to
TM-120, "In
"N" Position, Vehicle
Moves". ON veh

SYSTEM SYMPTOMTM-173
< SYMPTOM DIAGNOSIS >
CEF
G H
I
J
K L
M A
B
TM
N
O P
60
Others Vehicle runs with
transmission in “N” po-
sition.
Refer to
TM-120, "In
"N" Position, Vehicle
Moves". ON vehicle
1. Transmission range switch
TM-44
2. Fluid level and stateTM-179
3. Control cable adjustmentTM-195
4. Control valve with TCMTM-203
OFF vehicle5. Input clutch
TM-203
6. Gear systemTM-203
7. Direct clutchTM-203
8. Reverse brakeTM-203
9. Forward one- way clutch (Parts behind drum support is im-
possible to perform inspection by disassembly. Refer to TM-
8, TM-9
TM-203
10. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to TM-8
, TM-9TM-203
61 Engine does not start
in “N” or “P” position.
Refer to
TM-119, "En-gine Cannot Be Start-
ed in "P" or "N"
Position". ON vehicle1. Ignition switch and starter
2. Control cable adjustment
TM-195
3. Transmission range switch TM-44
62Engine starts in posi-
tions other than “N” or
“P”.
ON vehicle1. Ignition switch and starter
2. Control cable adjustment
TM-195
3. Transmission range switch TM-44
63 Engine stall.ON vehicle1. Fluid level and state
TM-179
2. Engine speed signal TM-52
3. Input speed sensorTM-47
4. Torque converter clutch solenoid valveTM-64
5. CAN communication line LAN-4
6. Control valve with TCMTM-203
OFF vehicle 7. Torque converter TM-203
64Engine stalls when se-
lect lever shifted “N”
→
“D”, “R”. ON vehicle1. Fluid level and state
TM-179
2. Engine speed signal TM-52
3. Input speed sensorTM-47
4. Torque converter clutch solenoid valveTM-64
5. CAN communication line LAN-4
6. Control valve with TCMTM-203
OFF vehicle 7. Torque converter TM-203
65 OthersEngine speed does
not return to idle.
Refer to
TM-142, "En-
gine Speed Does Not
Return to Idle". ON vehicle 1. Fluid level and state
TM-179
2. Direct clutch solenoid valve TM-84
3. Front brake solenoid valveTM-82
4. Accelerator pedal position sensorTM-70
5. Output speed sensor and vehicle speed signalTM-49,
TM-74
6. CAN communication line LAN-4
7. Control valve with TCMTM-203
OFF vehicle8. Front brake (brake band)
TM-2039. Direct clutchTM-203
No. Items Symptom Condition Diagnostic Item Reference
page
Revision: December 20092009 QX56

Page 3823 of 4171

INFINITI QX56 2009 Factory Service Manual
PRECAUTIONSTM-175
< PRECAUTION >
CEF
G H
I
J
K L
M A
B
TM
N
O P
5. When the repair work is completed, return the ignition switch to the ″LOCK ″ position before connecting
the battery cables. (At

PRECAUTIONSTM-175
< PRECAUTION >
CEF
G H
I
J
K L
M A
B
TM
N
O P
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 al l control units using CONSULT-III.
Precaution for On Board Diagnosis (OBD) System of A/T and EngineINFOID:0000000003772014
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 sw itch “OFF” and disconnect the negati ve 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 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:0000000003772015
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”.
After performing each TROUBL E 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 outsi de of the transmission. It is important to pre-
vent the internal parts from becoming contaminated 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: December 20092009 QX56

Page 3824 of 4171

INFINITI QX56 2009 Factory Service Manual
TM-176
< PRECAUTION >
PRECAUTIONS
All parts should be carefully cleaned with a general purpose, non-flammable solvent before inspection orreassembly.
Gaskets, seals and O-rings should be replaced

TM-176
< PRECAUTION >
PRECAUTIONS
All parts should be carefully cleaned with a general purpose, non-flammable solvent before inspection orreassembly.
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 s lide 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-
183, "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-181, "Changing the A/T Fluid (ATF)"
.
Service Notice or PrecautionINFOID:0000000003772016
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 radiat or 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-183,
"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 entir e 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.
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-68
.
Revision: December 20092009 QX56

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