2011 INFINITI QX56 ECU

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]
C
EF
G H
I
J
K L
M A
B
TM
N
O P
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-70
< ECU DIAGNOSIS INFORMATION >[7AT: RE7R01B]
TCM
TRGT PRES L/BLow brake is engaged 1370 kPa
Low brake is disengaged 0 kPa
TRGT PRES FR/B Front brake is engaged 1370 kPa
Front brake is disengaged 0 kPa
TRG PRE HLR/C High and low reverse clutch is disengaged 1370 kPa
High and low reverse clutch is engaged 0 kPa
TRGT PRES I/C Input clutch is disengaged 1370 kPa
Input clutch is engaged 0 kPa
TRGT PRES D/C Direct clutch is disengaged 1370 kPa
Direct clutch is engaged 0 kPa
TRG PRE 2346/B 2346 brake is engaged 1370 kPa
2346 brake is disengaged 0 kPa
SHIFT PATTERN During normal driving (without shift changes) FF
VEHICLE SPEED During driving Approximately equals the speed-
ometer reading.
G SEN SLOPE Level road 0%
Uphill slope Positive value (maximum 40.45%)
Downhill slope
Negative value (minimum
−
40.45%)
RANGE SW 4 Selector lever in “P
” and “N” positions OFF
Other than the above ON
RANGE SW 3 Selector lever in “P”,
“R” and “N” positions OFF
Other than the above ON
RANGE SW 2 Selector lever in “P
” and “R” positions OFF
Other than the above ON
RANGE SW 1 Selector lever in “P” position OFF
Other than the above ON
SFT DWN ST SW* Paddle shifter (shift-down) is pulled ON
Other than the above OFF
SFT UP ST SW* Paddle shifter (shift-up) is pulled ON
Other than the above OFF
DOWN SW LEVER Selector lever is shifted to
− side ON
Other than the above OFF
UP SW LEVER Selector lever is shifted to + side ON
Other than the above OFF
NON M-MODE SW Selector lever is shifted to manual shift gate side OFF
Other than the above ON
MANU MODE SW Selector lever is shifted to manual shift gate side ON
Other than the above OFF
TOW MODE SW To w m o d e O N
Other than the above OFF
DS RANGE* Driving with DS mode ON
Other than the above OFF
1 POSITION SW* Selector lever in “1” position ON
Other than the above OFF
Item name Condition Value / Status (Approx.)
Revision: 2010 May2011 QX56

TCM
TM-71
< ECU DIAGNOSIS INFORMATION > [7AT: RE7R01B]
C
EF
G H
I
J
K L
M A
B
TM
N
O P
OD CONT SW* When overdrive control switch is depressed ON
When overdrive control switch is released OFF
BRAKESW Brake pedal is depressed ON
Brake pedal is released OFF
POWERSHIFT SW* Power mode ON
Other than the above OFF
ASCD-OD CUT When TCM receives ASCD OD cancel request signal ON
Other than the above OFF
ASCD-CRUISE ASCD operate ON
Other than the above OFF
ABS SIGNAL ABS operate ON
Other than the above OFF
TCS GR/P KEEP When TCM receives TCS gear keep request signal ON
Other than the above OFF
TCS SIGNAL 2 When the reception value of A/T shift schedule change
demand signal is “cold”
ON
Other than the above OFF
TCS SIGNAL 1 When the reception value of A/T shift schedule change
demand signal is “warm”
ON
Other than the above OFF
LOW/B PARTS At 4GR - 5GR - 6GR
shift control FAIL
Other than the above NOTFAIL
HC/IC/FRB PARTS At 1GR - 2GR - 3GR
shift control FAIL
Other than the above NOTFAIL
IC/FRB PARTS At 4GR - 5GR - 6GR
shift control FAIL
Other than the above NOTFAIL
HLR/C PARTS At 4GR - 5GR - 6GR
shift control FAIL
Other than the above NOTFAIL
W/O THL POS Accelerator pedal is fully depressed ON
Accelerator pedal is released OFF
CLSD THL POS Accelerator pedal is released ON
Accelerator pedal is fully depressed OFF
DRV CST JUDGE Accelerator pedal is depressed DRIVE
Accelerator pedal is released COAST
Item name Condition Value / Status (Approx.)
Revision: 2010 May2011 QX56

TM-72
< ECU DIAGNOSIS INFORMATION >[7AT: RE7R01B]
TCM
SHIFT IND SIGNALWhen the selector lever is positioned in between each po-
sition.
OFF
Selector lever in “P” position P
Selector lever in “R” position R
Selector lever in “N” position N
Selector lever in “D” position D
Selector lever in “D” position: 7GR
Selector lever in “D” position: 6GR 6
Selector lever in “D” position: 5GR 5
Selector lever in “D” position: 4GR 4
Selector lever in “D” position: 3GR 3
Selector lever in “D” position: 2GR 2
Selector lever in “D” position: 1GR 1
Selector lever in “M” position: 1GR M1
Selector lever in “M” position: 2GR M2
Selector lever in “M” position: 3GR M3
Selector lever in “M” position: 4GR M4
Selector lever in “M” position: 5GR M5
Selector lever in “M” position: 6GR M6
Selector lever in “M” position: 7GR M7
Driving with DS mode DS
STARTER RELAY Selector lever in “P
” and “N” positions ON
Other than the above OFF
F-SAFE IND/L For 2 seconds after the ignition switch is turned ON ON
Other than the above OFF
ATF WARN LAMP* When TCM transmits the ATF indicator lamp signal ON
Other than the above OFF
MANU MODE IND Driving with manual mode ON
Other than the above OFF
ON OFF SOL MON Selector lever in “P
” and “N” positions
ON
Driving with 1GR to 3GR
Other than the above OFF
START RLY MON Selector lever in “P
” and “N” positions ON
Other than the above OFF
ON OFF SOL Selector lever in “P
” and “N” positions
ON
Driving with 1GR to 3GR
Other than the above OFF
Item name Condition Value / Status (Approx.)
Revision: 2010 May2011 QX56

TCM
TM-73
< ECU DIAGNOSIS INFORMATION > [7AT: RE7R01B]
C
EF
G H
I
J
K L
M A
B
TM
N
O P
*: Not mounted but always display as OFF.
TERMINAL LAYOUT
PHYSICAL VALUES
SLCT LVR POSI Selector lever in “N
” and “P” positions N/P
Selector lever in “R” position R
Selector lever in “D” and “DS” positions D
Selector lever in “M” position: 7GR
Selector lever in “M” position: 6GR 6
Selector lever in “M” position: 5GR 5
Selector lever in “M” position: 4GR 4
Selector lever in “M” position: 3GR 3
Selector lever in “M” position: 2GR 2
Selector lever in “M” position: 1GR 1
GEAR During driving 1st, 2nd, 3rd, 4th, 5th, 6th, 7th
NEXT GR POSI During driving 1st, 2nd, 3rd, 4th, 5th, 6th, 7th
SHIFT MODE Driving with the D position 0 or 3
Driving with the manual mode 4 or 8
D/C PARTS At 1GR - 2GR shift control FAIL
Other than the above NOTFAIL
FR/B PARTS At control fixed to 1GR FAIL
Other than the above NOTFAIL
2346/B PARTS At control fixed to 1GR FAIL
Other than the above NOTFAIL
2346B/DC PARTS At 2GR - 3GR - 4GR
shift control FAIL
Other than the above NOTFAIL
N IDLE STATUS Idle neutral is active ON
Other than the above OFF
Item name Condition Value / Status (Approx.)
SCIA1658E
Te r m i n a l
(Wire color) Description
Condition Value (Approx.)
+ −Signal name Input/
Output
1
(V) Ground Power supply Input Ignition switch ON Battery voltage
Ignition switch OFF 0 V
2
(P) Ground Power supply
(Memory back-up) Input Always Battery voltage
Revision: 2010 May2011 QX56

TM-74
< ECU DIAGNOSIS INFORMATION >[7AT: RE7R01B]
TCM
Fail-Safe
INFOID:0000000006226783
TCM has the electrical fail-safe mode. The mode is divi ded into a maximum of 3 phases (1st fail-safe, 2nd fail-
safe and final fail-safe) and functions so that the operat ion can be continued even if the signal circuit of the
main electronically controll ed input/output parts is damaged.
Even if the electronic circuit is normal, the fail-safe mode may start under special conditions (such as when the
brake pedal is depressed suddenly from a hard wheel spin status to stop the rotation of wheels). In this case,
turn the ignition switch OFF and back to ON after 5 seconds to resume the normal shift pattern.
Consequently, the customer's vehicle may already return to the normal condition. Refer to TM-88, "
Diagnosis
Flow".
FAIL-SAFE FUNCTION
3
(L) —CAN-H
Input/
Output ——
4
(SB) —K-line Input/
Output ——
5
(B) Ground Ground Output Always 0 V
6
(V) Ground Power supply Input Ignition switch ON Battery voltage
Ignition switch OFF 0 V
7
(R) Ground Back-up lamp relay Input Ignition switch ON Selector lever in
“R” position. 0 V
Selector lever in other than
above. Battery voltage
8
(P) —CAN-L Input/
Output ——
9
(BR) Ground Starter relay Output Ignition switch ON Selector lever in “N” and “P” po-
sitions.
Battery voltage
Selector lever in other than
above. 0 V
10
(B) Ground Ground Output Always 0 V
Te r m i n a l
(Wire color) Description
Condition Value (Approx.)
+ −Signal name Input/
Output
1st Fail-Safe The mode that the vehicle can stop safely, to prompt the driver to stop if the malfunction occurs and to shift to
2nd fail-safe early. It shifts to 2nd fail-safe or final fail-safe after the vehicle stopped.
2nd Fail-Safe The mode that the vehicle shifts to final fail-safe without changing the behavior, by identifying the malfunction-
ing parts in the condition that the driving force required for the driving is secured.
Final Fail-Safe  Selects the shifting pattern that the malfunctioning parts identified at 1st fail-safe and 2nd fail-safe are not
used, and then secure the driving forc e that is required for the driving.
 The mode that the shifting performance does not decrease by normal shift control.
Revision: 2010 May2011 QX56

TCM
TM-75
< ECU DIAGNOSIS INFORMATION > [7AT: RE7R01B]
C
EF
G H
I
J
K L
M A
B
TM
N
O P
DTC Veh ic le
condition Vehicle behavior for 1st fail-safe Vehicle behavior for 2nd fail-safe Vehicle behavior for final fail-safe
P0615 — Starter is disabled — Starter is disabled
P0705 —  Fixed in the “D” position (The
shifting can be performed)
 30 km/h (19MPH) or less
 Lock-up is prohibited
 The shifting between the gears of 3 - 4 - 5 - 6 - 7 can be per-
formed
 Manual mode is prohibited
 Shift position indicator is
switched OFF
 Starter relay is switched OFF
(starter is disabled)
 Back-up lamp is OFF
 Large shift shock — Fixed in the “D” position (The
shifting can be performed)
 30 km/h (19 MPH) or less
 Lock-up is prohibited
 The shifting between the gears of 3 - 4 - 5 - 6 - 7 can be per-
formed
 Manual mode is prohibited
 Shift position indicator is
switched OFF
 Starter relay is switched OFF
(starter is disabled)
 Back-up lamp is OFF
 Large shift shock
P0710 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
 Manual mode is prohibited
Between
the gears of
4 - 5 - 6 - 7  Fix the gear while driving
 Manual mode is prohibited
—
P0717 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
 Manual mode is prohibited
Between
the gears of 4 - 5 - 6 - 7  Fix the gear while driving
 Manual mode is prohibited
—
P0720 Between
the gears of
1 - 2 - 3  Only downshift can be per-
formed
 Manual mode is prohibited
 A vehicle speed signal from the combination mete r is regarded
as an effective signal —
 The shifting between the gears of 1 - 2 - 3 can be performed
 Manual mode is prohibited
Between
the gears of
4 - 5 - 6 - 7  Fix the gear at driving
 Manual mode is prohibited
 A vehicle speed signal from the
combination mete r is regarded
as an effective signal —
P0729
P0731
P0732
P0733
P0734
P0735
P1734 Neutral
malfunction
between
the gears of
1 - 2 - 3 and
7
Locks in 4GR
 Manual mode is prohibited
 Neutral
—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
 The shifting between the gears
of 4 - 5 - 6 can be performed
 Manual mode is prohibited
Other than
the above  Driving with the gear ratio be-
tween 1GR and 2GR
 Driving with the gear ratio be- tween 2GR and 3GR
Locks in 3GR
Locks in 4GR
 Fix the gear while driving
 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
 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
Revision: 2010 May2011 QX56