Infiniti QX56 (Z62). Manual — part 1291
TCM
TM-73
< ECU DIAGNOSIS INFORMATION >
[7AT: RE7R01B]
C
E
F
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
Terminal
(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
TM-74
< ECU DIAGNOSIS INFORMATION >
[7AT: RE7R01B]
TCM
Fail-Safe
INFOID:0000000006226783
TCM has the electrical fail-safe mode. The mode is divided into a maximum of 3 phases (1st fail-safe, 2nd fail-
safe and final fail-safe) and functions so that the operation can be continued even if the signal circuit of the
main electronically controlled 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
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
Terminal
(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 force that is required for the driving.
• The mode that the shifting performance does not decrease by normal shift control.
TCM
TM-75
< ECU DIAGNOSIS INFORMATION >
[7AT: RE7R01B]
C
E
F
G
H
I
J
K
L
M
A
B
TM
N
O
P
DTC
Vehicle
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 meter 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 meter 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
TM-76
< ECU DIAGNOSIS INFORMATION >
[7AT: RE7R01B]
TCM
Protection Control
INFOID:0000000006226784
The TCM becomes the protection control status temporarily 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 status 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
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