2011 INFINITI QX56 Factory Service Manual

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Page 5153 of 5598

INFINITI QX56 2011 Factory Service Manual
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

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

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INFINITI QX56 2011 Factory Service Manual
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 mon

Page 5155 of 5598

INFINITI QX56 2011 Factory Service Manual
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

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

Page 5156 of 5598

INFINITI QX56 2011 Factory Service Manual
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 shif

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

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INFINITI QX56 2011 Factory Service Manual
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

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

Page 5158 of 5598

INFINITI QX56 2011 Factory Service Manual
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

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INFINITI QX56 2011 Factory Service Manual
TCM
TM-71
< ECU DIAGNOSIS INFORMATION > [7AT: RE7R01B]
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OD CONT SW* When overdrive control switch is depressed ON
When overdrive control switch is released OFF
BRAKESW

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INFINITI QX56 2011 Factory Service Manual
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

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