Page 5161 of 5598
![INFINITI QX56 2011 Factory Service Manual
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
INFINITI QX56 2011 Factory Service Manual
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](/manual-img/42/57033/w960_57033-5160.png)
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
Page 5162 of 5598
![INFINITI QX56 2011 Factory Service Manual
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 INFINITI QX56 2011 Factory Service Manual
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](/manual-img/42/57033/w960_57033-5161.png)
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
Page 5163 of 5598
![INFINITI QX56 2011 Factory Service Manual
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 INFINITI QX56 2011 Factory Service Manual
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](/manual-img/42/57033/w960_57033-5162.png)
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
Page 5164 of 5598
![INFINITI QX56 2011 Factory Service Manual
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 TC INFINITI QX56 2011 Factory Service Manual
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 TC](/manual-img/42/57033/w960_57033-5163.png)
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
Page 5165 of 5598
![INFINITI QX56 2011 Factory Service Manual
TCM
TM-77
< ECU DIAGNOSIS INFORMATION > [7AT: RE7R01B]
C
EF
G H
I
J
K L
M A
B
TM
N
O P
1ST ENGINE BRAKE PROTECTION CONTROL
Controls the engine brake so as not to make effective by turning the front INFINITI QX56 2011 Factory Service Manual
TCM
TM-77
< ECU DIAGNOSIS INFORMATION > [7AT: RE7R01B]
C
EF
G H
I
J
K L
M A
B
TM
N
O P
1ST ENGINE BRAKE PROTECTION CONTROL
Controls the engine brake so as not to make effective by turning the front](/manual-img/42/57033/w960_57033-5164.png)
TCM
TM-77
< ECU DIAGNOSIS INFORMATION > [7AT: RE7R01B]
C
EF
G H
I
J
K L
M A
B
TM
N
O P
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
Page 5166 of 5598
![INFINITI QX56 2011 Factory Service Manual
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 p INFINITI QX56 2011 Factory Service Manual
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 p](/manual-img/42/57033/w960_57033-5165.png)
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
Page 5167 of 5598
![INFINITI QX56 2011 Factory Service Manual
TCM
TM-79
< ECU DIAGNOSIS INFORMATION > [7AT: RE7R01B]
C
EF
G H
I
J
K L
M A
B
TM
N
O P
*1: These numbers are prescribed by SAE J2012.
*2: Refer to TM-60, "
Diagnosis Description".
— P0725 ENGINE S INFINITI QX56 2011 Factory Service Manual
TCM
TM-79
< ECU DIAGNOSIS INFORMATION > [7AT: RE7R01B]
C
EF
G H
I
J
K L
M A
B
TM
N
O P
*1: These numbers are prescribed by SAE J2012.
*2: Refer to TM-60, "
Diagnosis Description".
— P0725 ENGINE S](/manual-img/42/57033/w960_57033-5166.png)
TCM
TM-79
< ECU DIAGNOSIS INFORMATION > [7AT: RE7R01B]
C
EF
G H
I
J
K L
M A
B
TM
N
O P
*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
Page 5168 of 5598
TM-80
< WIRING DIAGRAM >[7AT: RE7R01B]
A/T CONTROL SYSTEM
WIRING DIAGRAM
A/T CONTROL SYSTEM
Wiring DiagramINFOID:0000000006226787
JCDWM1062GB
Revision: 2010 May2011 QX56