2011 INFINITI QX56 clutch

DIAGNOSIS SYSTEM (TCM)TM-67
< SYSTEM DESCRIPTION > [7AT: RE7R01B]
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EF
G H
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K L
M A
B
TM
N
O P
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

TCM
TM-69
< ECU DIAGNOSIS INFORMATION > [7AT: RE7R01B]
C
EF
G H
I
J
K L
M A
B
TM
N
O P
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

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 0 kPa
TRG PRE HLR/C High and low reverse clutch is disengaged 1370 kPa
High and low reverse clutch is engaged 0 kPa
TRGT PRES I/C Input clutch is disengaged 1370 kPa
Input clutch is engaged 0 kPa
TRGT PRES D/C Direct clutch is disengaged 1370 kPa
Direct clutch is engaged 0 kPa
TRG PRE 2346/B 2346 brake is engaged 1370 kPa
2346 brake is disengaged 0 kPa
SHIFT PATTERN During normal driving (without shift changes) FF
VEHICLE SPEED During driving Approximately equals the speed-
ometer reading.
G SEN SLOPE Level road 0%
Uphill slope Positive value (maximum 40.45%)
Downhill slope
Negative value (minimum
−
40.45%)
RANGE SW 4 Selector lever in “P
” and “N” positions OFF
Other than the above ON
RANGE SW 3 Selector lever in “P”,
“R” and “N” positions OFF
Other than the above ON
RANGE SW 2 Selector lever in “P
” and “R” positions OFF
Other than the above ON
RANGE SW 1 Selector lever in “P” position OFF
Other than the above ON
SFT DWN ST SW* Paddle shifter (shift-down) is pulled ON
Other than the above OFF
SFT UP ST SW* Paddle shifter (shift-up) is pulled ON
Other than the above OFF
DOWN SW LEVER Selector lever is shifted to
− side ON
Other than the above OFF
UP SW LEVER Selector lever is shifted to + side ON
Other than the above OFF
NON M-MODE SW Selector lever is shifted to manual shift gate side OFF
Other than the above ON
MANU MODE SW Selector lever is shifted to manual shift gate side ON
Other than the above OFF
TOW MODE SW To w m o d e O N
Other than the above OFF
DS RANGE* Driving with DS mode ON
Other than the above OFF
1 POSITION SW* Selector lever in “1” position ON
Other than the above OFF
Item name Condition Value / Status (Approx.)
Revision: 2010 May2011 QX56

A/T FLUID COOLERTM-99
< BASIC INSPECTION > [7AT: RE7R01B]
C
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M A
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TM
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b. If one or more pieces of debr is are found that are over 1 mm
(0.040 in) in size and/or peeled clutch facing material is found in
the coffee filter, the A/T fluid c ooler is not serviceable. The A/T
fluid cooler/radiator must be replaced and the inspection proce-
dure is ended. Refer to TM-202, "
Exploded View".
InspectionINFOID:0000000006233277
After performing all procedures, ensure that all remaining oil is cleaned from all components.
SCIA7031E
Revision: 2010 May2011 QX56

TM-100
< BASIC INSPECTION >[7AT: RE7R01B]
STALL TEST
STALL TEST
Inspection and JudgmentINFOID:0000000006226793
INSPECTION
1. Inspect the amount of engine oil. Replenish the engine oil if necessary.
2. Drive for about 10 minutes to warm up the vehicle
so that the A/T fluid temperature is 50 to 80°C (122 to
176 °F). Inspect the amount of AT F. Replenish if necessary.
3. Securely engage the parking brake so that the tires do not turn.
4. Start the engine, apply foot brake, and place selector lever in “D” position.
5. Gradually press down the accelerator pedal while holding down the foot brake.
6. Quickly read off the stall speed, and quickly release the accelerator pedal. CAUTION:
Never hold down the accelerator pedal for more than 5 seconds during this test.
7. Shift the selector lever to “N” position.
8. Cool down the ATF. CAUTION:
Run the engine at idle for at least 1 minute.
9. Repeat steps 5 through 8 with selector lever in “R” position.
JUDGMENT OF STALL TEST
O: Stall speed within standard value position
H: Stall speed higher than standard value
L: Stall speed lower than standard value
Stall test standard value position
Stall speed : Refer to TM-297, "Stall Speed".
Selector lever position
Possible location of malfunction
“D” and “M” “R”
Stal l s pe ed HO
 Low brake
 1st one-way clutch
 2nd one-way clutch
OH  Reverse brake
 1st one-way clutch
 2nd one-way clutch
L L  Engine and torque converter one-way clutch
H H  Line pressure low
Does not shift-up “D” or “M” position 1 → 2 Slipping in 2GR, 3GR, 4GR or 6GR 2346 brake slippage
Does not shift-up “D” or “M” position 2 → 3 Slipping in 3GR, 4GR or 5GR Direct clutch slippage
Does not shift-up “D” or “M” position 3 → 4 Slipping in 4GR, 5GR, 6GR or 7GR High and low reverse clutch slippage
Does not shift-up “D” or “M” position 4 → 5 Slipping in 5GR, 6GR or 7GR Input clutch slippage
Does not shift-up “D” or “M” position 5 → 6 Slipping in 2GR, 3GR, 4GR or 6GR 2346 brake slippage
Does not shift-up “D” or “M” position 6 → 7 Slipping in 7GR Front brake slippage
Revision: 2010 May2011 QX56

TM-114
< DTC/CIRCUIT DIAGNOSIS >[7AT: RE7R01B]
P0729 6GR INCORRECT RATIO
P0729 6GR INCORRECT RATIO
DescriptionINFOID:0000000006226815
This malfunction is detected when the A/T does not shift
into 6GR position as instructed by TCM. This is not
only caused by electrical malfunction (circuits open or s horted) but by mechanical malfunction such as control
valve sticking, improper solenoid valve operation, etc.
DTC LogicINFOID:0000000006226816
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
CAUTION:
“ TM-115, "
Diagnosis Procedure"” must be performed before starting “DTC CONFIRMATION PROCE-
DURE”.
 Never perform “DTC CONFIRMATION PROCEDURE” before completing the repair, which may cause secondary malfunction.
 Always drive vehicle at a safe speed.
1.PRECONDITIONING
If “DTC CONFIRMATION PROCEDURE” is previously c onducted, always turn ignition switch OFF and wait at
least 10 seconds before performing the next test.
>> GO TO 2.
2.CHECK ATF TEMPERATURE
With CONSULT-III
1. Start the engine.
2. Select “ATF TEMP 1” in “Data Monitor” in “TRANSMISSION”.
3. Check ATF temperature is in the following range.
With GST
1. Start the engine.
2. Drive vehicle for approximately 5 minutes in urban areas.
Is ATF temperature within specified range?
YES >> GO TO 3.
NO >> Drive vehicle to warm ATF or stop engine to cool ATF.
3.CHECK SYMPTOM (PART 1)
With CONSULT-III
1. Select “6TH GR FNCTN P0729” in “DTC & SRT confirmation” in “TRANSMISSION”.
2. Drive vehicle with manual mode and maintain the following conditions.
DTC Trouble diagnosis name DTC is detected if... Possible cause
P0729 Gear 6 Incorrect Ratio The gear ratio is:
 0.915 or more
 0.813 or less Input clutch solenoid valve
 Direct clutch solenoid valve
 High and low reverse clutch
solenoid valve
 Front brake solenoid valve
 Low brake solenoid valve
 2346 brake solenoid valve
 Anti-interlock solenoid valve
 Each clutch and brake
 Output speed sensor
 Input speed sensor 1, 2
 Hydraulic co ntrol circuit
ATF TEMP 1 : 20 °C (68 °F) – 140 °C (284 °F)
Revision: 2010 May2011 QX56

TM-118
< DTC/CIRCUIT DIAGNOSIS >[7AT: RE7R01B]
P0731 1GR INCORRECT RATIO
P0731 1GR INCORRECT RATIO
DescriptionINFOID:0000000006226821
This malfunction is detected when the A/T does not shift
into 1GR position as instructed by TCM. This is not
only caused by electrical malfunction (circuits open or s horted) but by mechanical malfunction such as control
valve sticking, improper solenoid valve operation, etc.
DTC LogicINFOID:0000000006226822
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
CAUTION:
“ TM-119, "
Diagnosis Procedure"” must be performed before starting “DTC CONFIRMATION PROCE-
DURE”.
 Never perform “DTC CONFIRMATION PROCEDURE” before completing the repair, which may cause secondary malfunction.
 Always drive vehicle at a safe speed.
1.PRECONDITIONING
If “DTC CONFIRMATION PROCEDURE” is previously c onducted, always turn ignition switch OFF and wait at
least 10 seconds before performing the next test.
>> GO TO 2.
2.CHECK ATF TEMPERATURE
With CONSULT-III
1. Start the engine.
2. Select “ATF TEMP 1” in “Data Monitor” in “TRANSMISSION”.
3. Check ATF temperature is in the following range.
With GST
1. Start the engine.
2. Drive vehicle for approximately 5 minutes in urban areas.
Is ATF temperature within specified range?
YES >> GO TO 3.
NO >> Drive vehicle to warm ATF or stop engine to cool ATF.
3.CHECK SYMPTOM (PART 1)
With CONSULT-III
1. Select “1ST GR FNCTN P0731” in “DTC & SRT confirmation” in “TRANSMISSION”.
2. Drive vehicle with manual mode and maintain the following conditions.
DTC Trouble diagnosis name DTC is detected if... Possible cause
P0731 Gear 1 Incorrect Ratio The gear ratio is:
 5.180 or more
 4.594 or less Input clutch solenoid valve
 Direct clutch solenoid valve
 High and low reverse clutch
solenoid valve
 Front brake solenoid valve
 Low brake solenoid valve
 2346 brake solenoid valve
 Anti-interlock solenoid valve
 Each clutch and brake
 Output speed sensor
 Input speed sensor 1, 2
 Hydraulic co ntrol circuit
ATF TEMP 1 : 20 °C (68 °F) – 140 °C (284 °F)
Revision: 2010 May2011 QX56

TM-120
< DTC/CIRCUIT DIAGNOSIS >[7AT: RE7R01B]
P0732 2GR INCORRECT RATIO
P0732 2GR INCORRECT RATIO
DescriptionINFOID:0000000006226824
This malfunction is detected when the A/T does not shift
into 2GR position as instructed by TCM. This is not
only caused by electrical malfunction (circuits open or s horted) but by mechanical malfunction such as control
valve sticking, improper solenoid valve operation, etc.
DTC LogicINFOID:0000000006226825
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
CAUTION:
“ TM-121, "
Diagnosis Procedure"” must be performed before star ting “DTC CONFIRMATION PROCE-
DURE”.
 Never perform “DTC CONFIRMATION PROCEDURE” before completing the repair, which may cause secondary malfunction.
 Always drive vehicle at a safe speed.
1.PRECONDITIONING
If “DTC CONFIRMATION PROCEDURE” is previously c onducted, always turn ignition switch OFF and wait at
least 10 seconds before performing the next test.
>> GO TO 2.
2.CHECK ATF TEMPERATURE
With CONSULT-III
1. Start the engine.
2. Select “ATF TEMP 1” in “Data Monitor” in “TRANSMISSION”.
3. Check ATF temperature is in the following range.
With GST
1. Start the engine.
2. Drive vehicle for approximately 5 minutes in urban areas.
Is ATF temperature within specified range?
YES >> GO TO 3.
NO >> Drive vehicle to warm ATF or stop engine to cool ATF.
3.CHECK SYMPTOM (PART 1)
With CONSULT-III
1. Select “2ND GR FNCTN P0732” in “DTC & SRT confirmation” in “TRANSMISSION”.
2. Drive vehicle with manual mode and maintain the following conditions.
DTC Trouble diagnosis name DTC is detected if... Possible cause
P0732 Gear 2 Incorrect Ratio The gear ratio is:
 3.360 or more
 2.980 or less Input clutch solenoid valve
 Direct clutch solenoid valve
 High and low reverse clutch
solenoid valve
 Front brake solenoid valve
 Low brake solenoid valve
 2346 brake solenoid valve
 Anti-interlock solenoid valve
 Each clutch and brake
 Output speed sensor
 Input speed sensor 1, 2
 Hydraulic control circuit
ATF TEMP 1 : 20 °C (68 °F) – 140 °C (284 °F)
Revision: 2010 May2011 QX56