2011 INFINITI QX56 lock

TM-58
< SYSTEM DESCRIPTION >[7AT: RE7R01B]
SYSTEM
A/T SHIFT LOCK SYSTEM : System Description
INFOID:0000000006226779
The selector lever cannot be shift ed from the “P” position unless the
brake pedal is depressed while the ignition switch is set to ON. The
shift lock is unlocked by turning the shift lock solenoid ON when the
ignition switch is set to ON, the park position switch is turned ON
(selector lever is in “P” position), and the stop lamp switch is turned
ON (brake pedal is depressed) as shown in the operation chart in the
figure. Therefore, the shift lock solenoid receives no ON signal and
the shift lock remains locked if all of the above conditions are not ful-
filled. (However, selector operation is allowed if the shift lock release
button is pressed.)
SHIFT LOCK OPERATION AT “P” POSITION
When Brake Pedal Is Not Depressed (No Selector Operation Allowed)
The shift lock solenoid (A) is turned OFF (not energized) and the
solenoid rod (B) is extended with the spring when the brake pedal is
not depressed (no selector operation allowed) with the ignition
switch ON.
The connecting lock lever (C) is located at the position shown in the
figure when the solenoid rod is extended. It prevents the movement
of the detent rod (D). For these r easons, the selector lever cannot be
shifted from the “P” position.
When Brake Pedal Is Depressed (Shift Operation Allowed)
The shift lock solenoid (A) is turned ON (energized) when the brake
pedal is depressed with the ignition switch ON. The solenoid rod (B)
is compressed by the electrom agnetic force. The connecting lock
lever (C) rotates when the solenoid is activated. Therefore, the
detent rod (D) can be moved. For these reasons, the selector lever
can be shifted to other positions.
“P” POSITION HOLD MECHANI SM (IGNITION SWITCH LOCK)
JPDIA0624GB
JPDIA0612ZZ
JPDIA0613ZZ
Revision: 2010 May2011 QX56

SYSTEMTM-59
< SYSTEM DESCRIPTION > [7AT: RE7R01B]
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The shift lock solenoid (A) is not energized when the ignition switch
is in any position other than ON. In this condition, the shift mecha-
nism is locked and “P” position is held. The operation cannot be per-
formed from “P” position if the brake pedal is depressed with the
ignition switch ON when the operation system of shift lock solenoid is
malfunctioning. However, the lock lever (B) is forcibly rotated and the
shift lock is released when the shift lock release button (C) is
pressed from above. Then the sele ctor operation from “P” position
can be performed.
CAUTION:
Use the shift lock release button only when the selector lever canno t be operated even if the brake
pedal is depressed with the ignition switch ON.
D : Detent rodJPDIA0614ZZ
Revision: 2010 May2011 QX56

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-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

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