2011 INFINITI QX56 Starter

COMPONENT PARTSTM-11
< SYSTEM DESCRIPTION > [7AT: RE7R01B]
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NOTE:
The following components are included in the control valve & TCM (17).
TCM
 Input speed sensor 1, 2
 A/T fluid temperature sensor
 Transmission range switch
 Direct clutch solenoid valve
 High and low reverse clutch solenoid valve
 Input clutch solenoid valve
 Front brake solenoid valve
 Low brake solenoid valve
 Anti-interlock solenoid valve
 2346 brake solenoid valve
 Line pressure solenoid valve
 Torque converter clutch solenoid valve
A/T CONTROL SYSTEM : Component DescriptionINFOID:0000000006226739
Name Function
TCM TM-12, "
A/T CONTROL SYSTEM : TCM"
Transmission range switchTM-12, "A/T CONTROL SYSTEM : Transmission Range Switch"
Output speed sensor TM-12, "A/T CONTROL SYSTEM : Output Speed Sensor"
Input speed sensor 1
TM-12, "A/T CONTROL SYSTEM : Input Speed Sensor"Input speed sensor 2
A/T fluid temperature sensorTM-12, "
A/T CONTROL SYSTEM : A/T Fluid Temperature Sensor"
Input clutch solenoid valve TM-12, "A/T CONTROL SYSTEM : Input Clutch Solenoid Valve"
Front brake solenoid valve TM-12, "A/T CONTROL SYSTEM : Front Brake Solenoid Valve"
Direct clutch solenoid valveTM-12, "A/T CONTROL SYSTEM : Direct Clutch Solenoid Valve"
High and low reverse clutch solenoid valveTM-13, "A/T CONTROL SYSTEM : High and Low Reverse Clutch Solenoid Valve"
Low brake solenoid valve TM-13, "A/T CONTROL SYSTEM : Low Brake Solenoid Valve"
Anti-interlock solenoid valve TM-13, "A/T CONTROL SYSTEM : Anti-interlock Solenoid Valve"
2346 brake solenoid valve TM-13, "A/T CONTROL SYSTEM : 2346 Brake Solenoid Valve"
Torque converter clutch solenoid valveTM-13, "A/T CONTROL SYSTEM : Torque Converter Clutch Solenoid Valve"
Line pressure solenoid valve TM-13, "A/T CONTROL SYSTEM : Line Pressure Solenoid Valve"
Accelerator pedal position sensor TM-13, "A/T CONTROL SYSTEM : Accelerator Pedal Position Sensor"
Manual mode switch TM-13, "A/T CONTROL SYSTEM : Manual Mode Switch"
Tow mode switch TM-14, "A/T CONTROL SYSTEM : Tow Mode Switch"
A/T CHECK indicator lampTM-14, "A/T CONTROL SYSTEM : A/T CHECK Indicator Lamp"
Tow mode indicator lamp* TM-14, "A/T CONTROL SYSTEM : Tow Mode Indicator Lamp"
Selector lever position indicator TM-14, "A/T CONTROL SYSTEM : Selector Lever Position Indicator"
Stop lamp switch BRC-15, "Stop Lamp Switch"
Yaw rate/side G sensorBRC-15, "Yaw Rate/Side/Decel G sensor"
Starter relay STR-6, "System Description"
ECMEC-35, "ENGINE CONTROL SYSTEM : System Description"
BCM BCS-6, "BODY CONTROL SYSTEM : System Description"
Combination meter MWI-9, "METER SYSTEM : System Description"
ABS actuator and electric unit (control unit) BRC-16, "System Description"
Revision: 2010 May2011 QX56

TM-44
< SYSTEM DESCRIPTION >[7AT: RE7R01B]
SYSTEM
SYSTEM
A/T CONTROL SYSTEM
A/T CONTROL SYSTEM : System DiagramINFOID:0000000006226767
A/T CONTROL SYSTEM : System DescriptionINFOID:0000000006226768
INPUT/OUTPUT SIGNAL CHART
SYSTEM DESCRIPTION
 The A/T senses vehicle operating conditions through vari
ous sensors or signals. It always controls the opti-
mum shift position and reduces shifting and lock-up shocks.
 Receive input signals transmitted from various switches and sensors.
 Determine required line pressure, shifting point, lock-up operation, etc.
JSDIA1853GB
Sensor (or signal)
⇒TCM function
⇒Actuator
Transmission range switch
Accelerator pedal position signal
Closed throttle position signal
Wide open throttle position signal
Engine speed signal
A/T fluid temperature sensor
Output speed sensor
Vehicle speed signal
Manual mode switch signal
Stop lamp switch signal
Input speed sensor 1, 2
Yaw rate/side/decel G sensor
Tow mode switch signal Line pressure control (
TM-48
)
Shift change control ( TM-50
)
Shift pattern control ( TM-54
)
Lock-up control ( TM-56
)
Fail-safe control ( TM-45
)
Self-diagnosis ( TM-61
)
CONSULT-III communication line ( TM-61
)
CAN communication line ( TM-103
)Input clutch solenoid valve
Direct clutch solenoid valve
Front brake solenoid valve
High and low reverse clutch solenoid valve
Low brake solenoid valve
Torque converter clutch solenoid valve
Line pressure solenoid valve
Anti-interlock solenoid valve
2346 brake solenoid valve
A/T CHECK indicator lamp
Tow mode indicator lamp
Shift position indicator
Back-up lamp relay
Starter relay
Revision: 2010 May2011 QX56

SYSTEMTM-45
< SYSTEM DESCRIPTION > [7AT: RE7R01B]
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 Transmit required output signals to the respective solenoids.
A/T CONTROL SYSTEM : Fail-SafeINFOID:0000000006226769
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 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 st atus 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
1st Fail-SafeThe 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.
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
—
Revision: 2010 May2011 QX56

DIAGNOSIS SYSTEM (TCM)TM-65
< SYSTEM DESCRIPTION > [7AT: RE7R01B]
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ASCD-OD CUT (ON/OFF) X — Displays the reception status of ASCD OD can-
cel request signal received via CAN communi-
cation.
ASCD-CRUISE (ON/OFF) X — Displays the reception status of ASCD opera-
tion signal received via CAN communication.
ABS SIGNAL (ON/OFF) X — Displays the re
ception status of ABS operation
signal received via CAN communication.
TCS GR/P KEEP (ON/OFF) X — Displays the reception status of TCS gear keep
request signal received via CAN communica-
tion.
TCS SIGNAL 2 (ON/OFF) X — Displays whether the reception value of A/T
shift schedule change demand signal received
via CAN communication is “cold”.
TCS SIGNAL 1 (ON/OFF) X — Displays whether the reception value of A/T
shift schedule change demand signal received
via CAN communication is “warm”.
LOW/B PARTS (FAIL/NOTFAIL) — — Displays whether the identified malfunction
point judged by TCM is the related parts of low
brake.
HC/IC/FRB PARTS (FAIL/NOTFAIL) — — Displays whether the identified malfunction
point judged by TCM is the related parts of high
and low reversed clutch, input clutch or front
brake.
IC/FRB PARTS (FAIL/NOTFAIL) — — Displays whether the identified malfunction
point judged by TCM is the related parts of input
clutch or front brake.
HLR/C PARTS (FAIL/NOTFAIL) — — Displays whether the identified malfunction
point judged by TCM is the related parts of high
and low reversed clutch.
W/O THL POS (ON/OFF) X — Displays the kickdown condition signal status
received via CAN communication.
CLSD THL POS (ON/OFF) X — Displays the idling status signal status received
via CAN communication.
DRV CST JUDGE (DRIVE/COAST) — — Displays the judgment results of “driving” or
“coasting” judged by TCM.
SHIFT IND SIGNAL — — Displays the transmission value of shift position
signal transmitted via CAN communication.
STARTER RELAY (ON/OFF) — — Displays the command status from TCM to
starter relay.
F-SAFE IND/L (ON/OFF) — — Displays the transmission status of A/T CHECK
indicator lamp signal transmitted via CAN com-
munication.
ATF WARN LAMP (ON/OFF) — — Displays the transmission status of ATF tem-
perature signal transmitted via CAN communi-
cation.
MANU MODE IND (ON/OFF) — — Displays the transmission status of manual
mode signal transmitted via CAN communica-
tion.
ON OFF SOL MON (ON/OFF) — — Monitors the command value from TCM to the
anti-interlock solenoid, and displays the moni-
tor status.
Monitored item (Unit)
Monitor Item Selection
Remarks
ECU IN-
PUT SIG- NALS MAIN SIG-
NALS SELEC-
TION
FROM ITEM
Revision: 2010 May2011 QX56

TM-66
< SYSTEM DESCRIPTION >[7AT: RE7R01B]
DIAGNOSIS SYSTEM (TCM)
DTC & SRT CONFIRMATION
START RLY MON (ON/OFF) — — Monitors the command value from TCM to the
starter relay, and displays the monitor status.
ON OFF SOL (ON/OFF) — — Displays the command status from TCM to anti-
interlock solenoid.
SLCT LVR POSI — X Displays the shift positions recognized by TCM.
GEAR — X Displays the current transmission gear position
recognized by TCM.
NEXT GR POSI — — Displays the target gear position of gear
change that is calculated based on the vehicle
speed information and throttle information.
SHIFT MODE — — Displays the transmission driving mode recog-
nized by TCM.
D/C PARTS (FAIL/NOTFAIL) — — Displays whether the identified malfunction
point judged by TCM is the related parts of di-
rect clutch.
FR/B PARTS (FAIL/NOTFAIL) — — Displays whether the identified malfunction
point judged by TCM is the related parts of front
brake.
2346/B PARTS (FAIL/NOTFAIL) — — Displays whether the identified malfunction
point judged by TCM is the related parts of 2346
brake.
2346B/DC PARTS (FAIL/NOTFAIL) — — Displays whether the identified malfunction
point judged by TCM is the related parts of 2346
brake or direct clutch.
N IDLE STATUS (ON/OFF) — — Displays the control status of idle neutral con-
trol.
Monitored item (Unit)
Monitor Item Selection
Remarks
ECU IN-
PUT SIG- NALS MAIN SIG-
NALS SELEC-
TION
FROM ITEM
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

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]
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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