torque INFINITI QX56 2011 Factory Service Manual

DIAGNOSIS SYSTEM (TCM)TM-63
< SYSTEM DESCRIPTION > [7AT: RE7R01B]
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FR/B SOL MON (A) — — Monitors the command current from TCM to the
front brake solenoid, and displays the monitor
value.
HLR/C SOL MON (A) — — Monitors the command current from TCM to the
high and low reverse clutch solenoid, and dis-
plays the monitor value.
I/C SOL MON (A) — — Monitors the command current from TCM to the
input clutch solenoid, and displays the monitor
value.
D/C SOL MON (A) — — Monitors the command current from TCM to the
direct clutch solenoid, and displays the monitor
value.
2346/B SOL MON (A) — — Monitors the command current from TCM to the
2346 brake solenoid, and displays the monitor
value.
GEAR RATIO — X Displays the gear ratio calculated from input
speed and output speed.
ENGINE TORQUE (Nm) — — Displays the engine torque estimated value re-
ceived via CAN communication.
ENG TORQUE D (Nm) — — Displays the engine torque estimated value re-
flected the requested torque of each control unit
received via CAN communication.
INPUT TRQ S (Nm) — — Displays the input torque using for the oil pres-
sure calculation process of shift change control.
INPUT TRQ L/P (Nm) — — Displays the input torque using for the oil pres-
sure calculation process of line pressure con-
trol.
TRGT PRES L/P (kPa, kg/cm
2 or psi)—— Displays the target oil pressure value of torque
converter clutch solenoid valve calculated by
the oil pressure calculation process of lock-up
control.
TRGT PRES TCC (kPa, kg/cm
2 or psi)—— Displays the target oil pressure value of torque
converter clutch solenoid valve calculated by
the oil pressure calculation process of shift
change control.
TRGT PRES L/B (kPa, kg/cm
2 or psi)—— Displays the target oil pressure value of low
brake solenoid valve calculated by the oil pres-
sure calculation process of shift change control.
TRGT PRE FR/B (kPa, kg/cm
2 or psi)—— Displays the target oil pressure value of front
brake solenoid valve calculated by the oil pres-
sure calculation process of shift change control.
TRG PRE HLR/C (kPa, kg/cm
2 or psi)—— Displays the target oil pressure value of high
and low reverse clutch solenoid valve calculat-
ed by the oil pressure calculation process of
shift change control.
TRGT PRES I/C (kPa, kg/cm
2 or psi)—— Displays the target oil pressure value of input
clutch solenoid valve calculated by the oil pres-
sure calculation process of shift change control.
TRGT PRES D/C (kPa, kg/cm
2 or psi)—— Displays the target oil pressure value of direct
clutch solenoid valve calculated by the oil pres-
sure calculation process of shift change control.
Monitored item (Unit)
Monitor Item Selection
Remarks
ECU IN-
PUT SIG- NALS MAIN SIG-
NALS SELEC-
TION
FROM ITEM
Revision: 2010 May2011 QX56

DIAGNOSIS SYSTEM (TCM)TM-67
< SYSTEM DESCRIPTION > [7AT: RE7R01B]
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Item name Description Check item
1ST GR FNCTN P0731 Following items for “1GR incorrect ratio” can be confirmed.
 Self-diagnosis status (whether the diagnosis is being performed or not)
 Self-diagnostic results (OK or NG)
 Input clutch solenoid
valve
 Front brake solenoid
valve
 Direct clutch solenoid valve
 High and low reverse clutch solenoid valve
 Low brake solenoid
valve
 2346 brake solenoid valve
 Anti-interlock sole- noid valve
 Each clutch and brake
 Output speed sensor
 Input speed sensor 1, 2
 Hydraulic control cir- cuit
2ND GR FNCTN P0732
Following items for “2GR incorrect ratio” can be confirmed.
 Self-diagnosis status (whether the diagnosis is being performed or not)
 Self-diagnostic results (OK or NG)
3RD GR FNCTN P0733 Following items for “3GR incorrect ratio” can be confirmed.
 Self-diagnosis status (whether the diagnosis is being performed or not)
 Self-diagnostic results (OK or NG)
4TH GR FNCTN P0734 Following items for “4GR incorrect ratio” can be confirmed.
 Self-diagnosis status (whether the diagnosis is being performed or not)
 Self-diagnostic results (OK or NG)
5TH GR FNCTN P0735 Following items for “5GR incorrect ratio” can be confirmed.
 Self-diagnosis status (whether the diagnosis is being performed or not)
 Self-diagnostic results (OK or NG)
6TH GR FNCTN P0729 Following items for “6GR incorrect ratio” can be confirmed.
 Self-diagnosis status (whether the diagnosis is being performed or not)
 Self-diagnostic results (OK or NG)
7TH GR FNCTN P1734 Following items for “7GR incorrect ratio” can be confirmed.
 Self-diagnosis status (whether the diagnosis is being performed or not)
 Self-diagnostic results (OK or NG)
TCC SOL FUNCTN CHECK Following items for “TCC solenoid function” can be confirmed.
 Self-diagnosis status (whether the diagnosis is being performed or not)
 Self-diagnostic results (OK or NG)  Harness or connec-
tors
 Torque converter
clutch solenoid valve
 Torque converter
 Input speed sensor 1, 2
 Hydraulic control cir- cuit
Revision: 2010 May2011 QX56

TM-68
< ECU DIAGNOSIS INFORMATION >[7AT: RE7R01B]
TCM
ECU DIAGNOSIS INFORMATION
TCM
Reference ValueINFOID:0000000006226782
VALUES ON DIAGNOSIS TOOL
NOTE:
1. The CONSULT-III electrically displays shift timi
ng and lock-up timing (that is, operation timing of each
solenoid).
Check for time difference between actual shift timi ng and the CONSULT-III display. If the difference is
noticeable, mechanical parts (except solenoids, sens ors, etc.) may be malfunctioning. Check mechanical
parts in accordance with the specified diagnostic procedures.
2. Shift schedule (that implies gear position) on CONSULT-III may slightly differ from that is described in Ser-
vice Manual. This occurs because of the reasons as per the following:
- Actual shift schedule has more or less tolerance or allowance
- Shift schedule in Service Manual refers to the point where shifting starts
- Gear position on CONSULT-III indicates the point where shifting completes
3. Display of solenoid valves on CONSULT-III changes at t he start of shifting, while gear position is displayed
upon completion of shifting (which is computed by TCM).
CONSULT-III MONITOR ITEM
Item name Condition Value / Status (Approx.)
VHCL/S SE-A/T During driving Approximately equals the speed-
ometer reading.
ESTM VSP SIG During driving Approximately equals the speed-
ometer reading.
OUTPUT REV During driving (lock-up ON) Tachometer / Gear ratio
INPUT SPEED During driving (lock-up ON) Approximately equals the engine
speed.
F SUN GR REV During driving Revolution of front sun gear is indi-
cated.
F CARR GR REV During driving Revolution of front carrier is indi-
cated.
ENGINE SPEED Eng ine running Closely equals the tachometer
reading.
TC SLIP SPEED During driving Engine speed − Input speed
ACCELE POSI Accelerator pedal is released 0.0/8
Accelerator pedal is fully depressed 8.0/8
THROTTLE POSI Accelerator pedal is released 0.0/8
Accelerator pedal is fully depressed 8.0/8
ATF TEMP 1 Ignition switch ON Temperature of ATF in the oil pan is
indicated.
ATF TEMP 2 Ignition switch ON Temperature of ATF at the exit of
torque converter.
AT F T E M P S E 1 0 °C (32 ° F) – 20 °C (68 °F) – 80 °C (176 °F) 3.3 – 2.7 – 0.9 V
BATTERY VOLT Ignition switch ON Battery voltage (11 V – 14 V)
LINE PRES SOL During driving 0.2 – 0.6 A
TCC SOLENOID Slip lock-up is active 0.2 – 0.8 A
Lock-up is active 0.8 A
Other than the above 0 A
L/B SOLENOID Low brake is engaged 0.6 – 0.8 A
Low brake is disengaged 0 – 0.05 A
Revision: 2010 May2011 QX56

TCM
TM-69
< ECU DIAGNOSIS INFORMATION > [7AT: RE7R01B]
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FR/B SOLENOID Front brake is engaged 0.6 – 0.8 A
Front brake is disengaged 0 – 0.05 A
HLR/C SOL High and low reverse clutch is disengaged 0.6 – 0.8 A
High and low reverse clutch is engaged 0 – 0.05 A
I/C SOLENOID Input clutch is disengaged 0.6 – 0.8 A
Input clutch is engaged 0 – 0.05 A
D/C SOLENOID Direct clutch is disengaged 0.6 – 0.8 A
Direct clutch is engaged 0 – 0.05 A
2346/B SOL 2346 brake is engaged 0.6 – 0.8 A
2346 brake is disengaged 0 – 0.05 A
L/P SOL MON During driving 0.2 – 0.6 A
TCC SOL MON Slip lock-up is active 0.2 – 0.8 A
Lock-up is active 0.8 A
Other than the above 0 A
L/B SOL MON Low brake is engaged 0.6 – 0.8 A
Low brake is disengaged 0 – 0.05 A
FR/B SOL MON Front brake is engaged 0.6 – 0.8 A
Front brake is disengaged 0 – 0.05 A
HLR/C SOL MON High and low reverse clutch is disengaged 0.6 – 0.8 A
High and low reverse clutch is engaged 0 – 0.05 A
I/C SOL MON Input clutch is disengaged 0.6 – 0.8 A
Input clutch is engaged 0 – 0.05 A
D/C SOL MON Direct clutch is disengaged 0.6 – 0.8 A
Direct clutch is engaged 0 – 0.05 A
2346/B SOL MON 2346 brake is engaged 0.6 – 0.8 A
2346 brake is disengaged 0 – 0.05 A
GEAR RATIO Driving with 1GR 4.887
Driving with 2GR 3.170
Driving with 3GR 2.027
Driving with 4GR 1.412
Driving with 5GR 1.000
Driving with 6GR 0.864
Driving with 7GR 0.775
ENGINE TORQUE During driving Changes the value according to
the acceleration or deceleration.
ENG TORQUE D During driving Changes the value according to
the acceleration or deceleration.
INPUT TRQ S During driving Changes the value according to
the acceleration or deceleration.
INPUT TRQ L/P During driving Changes the value according to
the acceleration or deceleration.
TRGT PRES L/P Selector lever in “P” an
d “N” positions 490 kPa
Other than the above 490 – 1370 kPa
TRGT PRES TCC Slip lock-up is active 0 – 600 kPa
Lock-up is active 600 kPa
Other than the above 0 kPa
Item name Condition Value / Status (Approx.)
Revision: 2010 May2011 QX56

TM-76
< ECU DIAGNOSIS INFORMATION >[7AT: RE7R01B]
TCM
Protection Control
INFOID:0000000006226784
The TCM becomes the protection control status temporar ily to protect the safety when the safety of TCM and
transmission is lost. It automatically returns to the normal status if the safety is secured.
The TCM has the following protection control.
REVERSE INHIBIT CONTROL
Intercepts the torque transmission and shift to the neutral stat us if the selector lever is shifted to “R” position
while the vehicle moves forward at the vehicle speed 10 km/h (7 MPH) or more.
P0730 —  Manual mode is prohibited
Neutral  The shifting between the gears
of 1 - 2 - 3 can be performed
 Manual mode is prohibited  Locks in 1GR
 The shifting between the gears
of 1 - 2 can be performed
 The shifting between the gears
of 1 - 2 - 3 can be performed
 Manual mode is prohibited
P0740 —  Lock-up is prohibited
 Slip lock-up is prohibited — Lock-up is prohibited
 Slip lock-up is prohibited
P0744 —  Lock-up is prohibited
 Slip lock-up is prohibited
— Lock-up is prohibited
 Slip lock-up is prohibited
P0750
P0775
P0795
P2713
P2722
P2731
P2807 —
 Locks in 2GR, 3GR, 4GR, 5GR,
6GR or 7GR
 Manual mode is prohibited — Locks in 1GR
 The shifting between the gears
of 1 - 2 - 3 can be performed
 The shifting between the gears of 3 - 4 - 5 can be performed
 The shifting between the gears
of 4 - 5 - 6 can be performed
 The shifting between the gears of 1 - 2 - 3 - 4 - 5 - 6 can be per-
formed
 Manual mode is prohibited
P0780 —  Manual mode is prohibited
Neutral — The shifting between the gears
of 1 - 2 - 3 can be performed
 Manual mode is prohibited
P1705 —  Downshift when accelerator ped-
al is depressed is prohibited
 Upshift when accelerator pedal
is released is prohibited
 Manual mode is prohibited  Downshift when accelerator ped-
al is depressed is prohibited
 Upshift when accelerator pedal
is released is prohibited
 Manual mode is prohibited  Downshift when accelerator ped-
al is depressed is prohibited
 Upshift when accelerator pedal
is released is prohibited
 Manual mode is prohibited
P1730 — Neutral
 Manual mode is prohibited  The shifting between the gears
of 1 - 2 - 3 can be performed
 Manual mode is prohibited  Locks in 1GR
 The shifting between the gears
of 2 - 3 - 4 can be performed
 The shifting between the gears of 3 - 4 can be performed
 The shifting between the gears of 4 - 5 - 6 can be performed
 Manual mode is prohibited
P1815 — Manual mode is prohibited — Manual mode is prohibited
U0300
U1000 Between
the gears of
1 - 2 - 3  The shifting between the gears
of 1 - 2 - 3 can be performed
 Manual mode is prohibited —
 The shifting between the gears
of 1 - 2 - 3 can be performed
 Line pressure is set to the maxi- mum hydraulic pressure
 Manual mode is prohibited
Between
the gears of 4 - 5 - 6 - 7  Fix the gear at driving
 Manual mode is prohibited
—
P0720 and
P1721 — Locks in 5GR — Locks in 5GR
DTC
Vehicle
condition Vehicle behavior for 1st fail-safe Vehicle behavior for 2nd fail-safe Vehicle behavior for final fail-safe
Revision: 2010 May2011 QX56

TCM
TM-77
< ECU DIAGNOSIS INFORMATION > [7AT: RE7R01B]
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1ST ENGINE BRAKE PROTECTION CONTROL
Controls the engine brake so as not to make effective by turning the front brake solenoid output to OFF when
each solenoid becomes the electricity pattern of 1st engine brake during driving at the vehicle speed 25 km/h
or more in any positions other than “R” position and 1GR.
TCM HIGH TEMPERATURE PROTECTION CONTROL
Limit the accelerator opening and forcibly control the vehi cle to the low torque driving when the electronic sub-
strate in TCM reaches the high temperature.
DTC Inspection Priority ChartINFOID:0000000006226785
If some DTCs are displayed at the same time, perfo rm inspections one by one based on the priority as per the
following list.
Malfunction detection condition Vehicle speed: 10 km/h (7 MPH) or more
Control at malfunction Neutral
Normal return condition  Vehicle speed: 8 km/h (5 MPH) or less
and
 Engine speed: 2,200 rpm or less
Vehicle behavior  The torque transmission cannot be performed
 There is a shock just before a vehicle stop
Malfunction detection condition Select lever and gear: Any position other than “R” position and 1GR
and
 Vehicle speed: More than 25 km/h (16 MPH)
Control at malfunction Front brake solenoid output signal; OFF
Normal return condition Other than detection condition of malfunction
Vehicle behavior Does not exist
Malfunction detection condition TCM electronic substrate temperature
145
°C (293 °F) and 120 seconds
or
150 °C (302 °F)
Control at malfunction Accelerator opening: 0.5/8 or less
Normal return condition  TCM electronic substrate temperature: Less than 140
°C (284 °F)
and
 Vehicle speed: 5 km/h (3 MPH) or less
Vehicle behavior Accelerator opening: output torque of approximately 0.5/8
Priority Detected items (DTC) Reference 1 U1000 CAN COMM CIRCUIT TM-103, "
DTC Logic"
Revision: 2010 May2011 QX56

TM-78
< ECU DIAGNOSIS INFORMATION >[7AT: RE7R01B]
TCM
DTC Index
INFOID:0000000006226786
NOTE:
 If some DTCs are displayed at the same time, per form inspections one by one based on the priority as per
the following list. Refer to TM-77, "
DTC Inspection Priority Chart".
 The IGN counter is indicated in Freeze frame data (FFD). Refer to TM-61, "
CONSULT-III Function (TRANS-
MISSION)".
2P0615 STARTER RELAY
TM-104, "
DTC Logic"
P0705 T/M RANGE SWITCH ATM-106, "DTC Logic"
P0710 FLUID TEMP SENSOR ATM-107, "DTC Logic"
P0717 INPUT SPEED SENSOR ATM-109, "DTC Logic"
P0720 OUTPUT SPEED SENSOR TM-110, "DTC Logic"
P0740 TORQUE CONVERTERTM-128, "DTC Logic"
P0745 PC SOLENOID ATM-131, "DTC Logic"
P0750 SHIFT SOLENOID ATM-132, "DTC Logic"
P0775 PC SOLENOID BTM-133, "DTC Logic"
P0795 PC SOLENOID CTM-136, "DTC Logic"
P2713 PC SOLENOID DTM-147, "DTC Logic"
P2722 PC SOLENOID ETM-148, "DTC Logic"
P2731 PC SOLENOID FTM-149, "DTC Logic"
P2807 PC SOLENOID GTM-150, "DTC Logic"
3P0729 6GR INCORRECT RATIO
TM-114, "
DTC Logic"
P0730 INCORRECT GR RATIOTM-116, "DTC Logic"
P0731 1GR INCORRECT RATIOTM-118, "DTC Logic"
P0732 2GR INCORRECT RATIOTM-120, "DTC Logic"
P0733 3GR INCORRECT RATIOTM-122, "DTC Logic"
P0734 4GR INCORRECT RATIOTM-124, "DTC Logic"
P0735 5GR INCORRECT RATIOTM-126, "DTC Logic"
P0744 TORQUE CONVERTERTM-129, "DTC Logic"
P0780 SHIFTTM-134, "DTC Logic"
P1730 INTERLOCKTM-140, "DTC Logic"
P1734 7GR INCORRECT RATIOTM-142, "DTC Logic"
4U0300 CAN COMM DATA
TM-102, "
DTC Logic"
P0725 ENGINE SPEED TM-112, "DTC Logic"
P1705 TP SENSORTM-137, "DTC Logic"
P1721 VEHICLE SPEED SIGNALTM-138, "DTC Logic"
P1815 M-MODE SWITCHTM-144, "DTC Logic"
Priority Detected items (DTC) Reference
DTC*1
Items
(CONSULT-III screen terms) Reference
MIL*2, “ENGINE” with
CONSULT-III or GST CONSULT-III only
“TRANSMISSION”
— P0615 STARTER RELAY TM-104
P0705 P0705 T/M RANGE SWITCH A TM-106
P0710 P0710 FLUID TEMP SENSOR ATM-107
P0717 P0717 INPUT SPEED SENSOR ATM-109
P0720 P0720 OUTPUT SPEED SENSOR TM-110
Revision: 2010 May2011 QX56

TCM
TM-79
< ECU DIAGNOSIS INFORMATION > [7AT: RE7R01B]
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*1: These numbers are prescribed by SAE J2012.
*2: Refer to TM-60, "
Diagnosis Description".
— P0725 ENGINE SPEED
TM-112
P0729 P0729 6GR INCORRECT RATIO TM-114
P0730 P0730 INCORRECT GR RATIOTM-116
P0731 P0731 1GR INCORRECT RATIOTM-118
P0732 P0732 2GR INCORRECT RATIOTM-120
P0733 P0733 3GR INCORRECT RATIOTM-122
P0734 P0734 4GR INCORRECT RATIOTM-124
P0735 P0735 5GR INCORRECT RATIOTM-126
P0740 P0740 TORQUE CONVERTERTM-128
P0744 P0744 TORQUE CONVERTERTM-129
P0745 P0745 PC SOLENOID ATM-131
P0750 P0750 SHIFT SOLENOID ATM-132
P0775 P0775 PC SOLENOID BTM-133
P0780 P0780 SHIFTTM-134
P0795 P0795 PC SOLENOID CTM-136
— P1705 TP SENSORTM-137
— P1721 VEHICLE SPEED SIGNALTM-138
P1730 P1730 INTERLOCK TM-140
P1734 P1734 7GR INCORRECT RATIOTM-142
— P1815 M-MODE SWITCHTM-144
P2713 P2713 PC SOLENOID D TM-147
P2722 P2722 PC SOLENOID ETM-148
P2731 P2731 PC SOLENOID FTM-149
P2807 P2807 PC SOLENOID GTM-150
— U0300 CAN COMM DATATM-102
U1000 U1000 CAN COMM CIRCUIT TM-103
DTC*1
Items
(CONSULT-III screen terms) Reference
MIL*2, “ENGINE” with
CONSULT-III or GST CONSULT-III only
“TRANSMISSION”
Revision: 2010 May2011 QX56

A/T FLUIDTM-95
< BASIC INSPECTION > [7AT: RE7R01B]
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d. When the ATF starts to drip, tighten the drain plug to the oil pan to the specified torque. Refer to TM-182,
"Exploded View".
CAUTION:
Never reuse drain plug and drain plug gasket.
e. Remove overflow plug from oil pan.
f. Install the charging pipe (A) to the overflow plug hole. CAUTION:
Tighten the charging pipe by hand.
g. Install the bucket pump hose (B) to the charging pipe. CAUTION:
Insert the bucket pump hose all the way to the end of the
charging pipe.
h. Fill approximately 3 liters (3-1/8 US qt, 2-5/8 lmp qt) of the ATF.
i. Remove the bucket pump hose to remove the charging pipe, and then temporarily tighten the overflow plug to the oil pan.
CAUTION:
Quickly perform the procedure to avoid ATF leakage from
the oil pan.
j. Lift down the vehicle.
k. Start the engine.
l. Make the ATF temperature approximately 40 °C (104 °F).
NOTE:
The ATF level is greatly affected by the temperat ure. Always check the ATF temperature on “ATF TEMP
1” of “Data Monitor” using CONSULT-III.
m. Park vehicle on level surface and set parking brake.
n. Shift the selector lever through each gear pos ition. Leave selector lever in “P” position.
o. Lift up the vehicle when the ATF temperature reaches 40 °C (104 °F), and remove the overflow plug from
the oil pan.
CAUTION:
Perform “Step 4-o” with the engine at idle.
p. When the ATF starts to drip, tighten the overflow plug to the oil pan to the specified torque. Refer to TM-
182, "Exploded View".
CAUTION:
Never reuse overflow plug.
AdjustmentINFOID:0000000006226792
CAUTION:
 Use only Genuine NISSAN Matic S ATF. Never mix with other ATF.
 Using ATF other than Genuine NI SSAN Matic S ATF will cause deteri oration in driveability and A/T
durability, and may damage the A/T, which is not covered by the INFINITI new vehicle limited war-
ranty.
 When filling ATF, be careful not to sca tter heat generating parts such as exhaust.
 Always maintain the ATF temperature within between 35 °C (95 °F) and 45 °C (113 °F) while checking
with CONSULT-III when the ATF level adjustment is performed.
JSDIA1335ZZ
Recommended fluid and fluid capacity : Refer to TM-296, "General Specification".
Revision: 2010 May2011 QX56

TM-96
< BASIC INSPECTION >[7AT: RE7R01B]
A/T FLUID
1. Install the O-ring (315268E000) (A) to the charging pipe
(310811EA5A) (B).
2. Start the engine.
3. Make the ATF temperature approximately 40 °C (104 °F).
NOTE:
The ATF level is greatly affected by the temperature. Always
check the ATF temperature on “ATF TEMP 1” of “Data Monitor”
using CONSULT-III.
4. Park vehicle on level surface and set parking brake.
5. Shift the selector lever through each gear position. Leave selec- tor lever in “P” position.
6. Lift up the vehicle.
7. Check the ATF leakage from transmission.
8. Remove overflow plug from oil pan.
9. Install the charging pipe (A) to the overflow plug hole. CAUTION:
Tighten the charging pipe by hand.
10. Install the bucket pump hose (B) to the charging pipe. CAUTION:
Insert the bucket pump hose all the way to the end of the
charging pipe.
11. Fill approximately 0.5 liters (1/2 US qt, 1/2 lmp qt) of the ATF.
12. Check that the ATF leaks when removing the charging pipe and the bucket pump hose. If the A TF does not leak, refill the ATF.
CAUTION:
Perform “Step 12” with the engine at idle.
13. When the ATF starts to drip, tighten the overflow pl ug to the oil pan to the specified torque. Refer to TM-
182, "Exploded View".
CAUTION:
Never reuse overflow plug.
JSDIA1334ZZ
JSDIA1335ZZ
Revision: 2010 May2011 QX56