2007 INFINITI QX56 service indicator

TROUBLE DIAGNOSIS
AT-47
< SERVICE INFORMATION >
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Customer name MR/MS Model & Year VIN
Trans. Model Engine Mileage
Malfunction Date Manuf. Date In Service Date
Frequencyo Continuouso Intermittent ( times a day)
Symptomso Vehicle does not move. (o Any positiono Particular position)
o No up-shift (o 1st → 2ndo 2nd → 3rdo 3rd → 4th o 4th → 5th)
o No down-shift (o 5th → 4th o 4th → 3rdo 3rd → 2ndo 2nd → 1st)
o Lock-up malfunction
o Shift point too high or too low.
o Shift shock or slip (o N → Do Lock-upo Any drive position)
o Noise or vibration
o No kick down
o No pattern select
o Others
()
Malfunction indicator lamp (MIL)o Continuously lito Not lit
1o Read the item on cautions concerning fail-safe and understand the customer's complaint.AT- 4 3
2o ATF inspection
AT- 5 1o Leak (Repair leak location.)
o Sta te
o Amount
3o Stall test and line pressure test
AT- 5 1
, AT-
51
o Stall test
o Torque converter one-way clutch
o Front brake
o High and low reverse clutch
o Low coast brake
o Forward brake
o Reverse brake
o Forward one-way clutcho 1st one-way clutch
o 3rd one-way clutch
o Engine
o Line pressure low
o Except for input clutch and direct
clutch, clutches and brakes OK
o Line pressure inspection - Suspected part:

AT-48
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS
4o Perform all road tests and enter checks in required inspection items.AT- 5 1
4-1.Check before engine is started
AT- 5 5
o AT- 1 6 7 , "A/T Check Indicator Lamp Does Not Come On".
o Perform self-diagnostics Enter checks for detected items. AT- 8 3
o AT- 9 1
o AT- 9 4
o AT- 9 8
o AT- 9 9
o AT- 1 0 3
o AT- 1 0 5
o AT- 1 0 9
o AT- 111
o AT- 11 3
o AT- 11 5
o AT- 11 7
o AT- 11 9
o AT- 1 2 4
o AT- 1 2 6
o AT- 1 2 8
o AT- 1 3 0
o AT- 1 3 2
o AT- 1 3 4
o AT- 1 3 6
o AT- 1 3 8
o AT- 1 4 0
o AT- 1 4 2
o AT- 1 4 4
o AT- 1 4 6
o AT- 1 4 8
o AT- 1 5 0
o AT- 1 5 2
o AT- 1 5 4
o AT- 1 5 6
4-2.Idle inspection
AT- 5 5
o AT- 1 6 8 , "Engine Cannot Be Started in "P" or "N" Position"
o AT- 1 6 8 , "In "P" Position, Vehicle Moves When Pushed"
o AT- 1 6 9 , "In "N" Position, Vehicle Moves"
o AT- 1 7 0 , "Large Shock ("N" to "D" Position)"
o AT- 1 7 2 , "Vehicle Does Not Creep Backward in "R" Position"
o AT- 1 7 5 , "Vehicle Does Not Creep Forward in "D" Position"
4-3.Driving tests
AT- 5 6
Part 1
o AT- 1 7 7 , "
Vehicle Cannot Be Started from D1"
o AT- 1 7 9 , "A/T Does Not Shift: D1→ D2"
o AT- 1 8 1 , "A/T Does Not Shift: D2→ D3"
o AT- 1 8 3 , "A/T Does Not Shift: D3→ D4"
o AT- 1 8 5 , "A/T Does Not Shift: D4→ D5"
o AT- 1 8 7 , "A/T Does Not Perform Lock-up"
o AT- 1 8 9 , "A/T Does Not Hold Lock-up Condition"
o AT- 1 9 0 , "Lock-up Is Not Released"
o AT- 1 9 1 , "Engine Speed Does Not Return to Idle"

TROUBLE DIAGNOSIS
AT-55
< SERVICE INFORMATION >
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ROAD TEST
Description
• The road test inspects overall performance of the A/T and analyzes possible malfunction causes.
• The road test is carried out in the following three stages.
1. Check before engine is started. Refer to AT- 5 5
.
2. Check at idle. Refer to AT- 5 5
3. Cruise test
• Inspect all the items from Part 1 to Part 3. Refer to AT- 5 6
, AT- 5 8, AT- 5 9.
• Before beginning the road test, check the test procedure and inspection items.
• Test all inspection items until the symptom is uncovered. Diagnose NG items when all road tests are com-
plete.
Check Before Engine Is StartedINFOID:0000000003532249
1.CHECK AT CHECK INDICATOR LAMP
1. Park vehicle on level surface.
2. Move selector lever to “P” position.
3. Turn ignition switch to “OFF” position and wait at least 10 seconds.
4. Turn ignition switch to “ON” position. (Do not start engine.)
Does AT CHECK indicator lamp light up for about 2 seconds?
YES >> 1. Turn ignition switch to “OFF” position.
2. Carry out the self-diagnostics and record all NG items on the diagnostics worksheet. Refer to
AT-83, "
CONSULT-II Function (A/T)".
3. Go to AT-55, "
Check at Idle".
NO >> Stop the road test and go to AT-167, "
A/T Check Indicator Lamp Does Not Come On".
Check at IdleINFOID:0000000003532250
1.CHECK STARTING THE ENGINE
1. Park vehicle on level surface.
2. Move selector lever to “P” or “N” position.
3. Turn ignition switch to “OFF” position.
4. Turn ignition switch to “START” position.
Does the engine start?
YES >> GO TO 2.
NO >> Stop the road test and go to AT-168, "
Engine Cannot Be Started in "P" or "N" Position".
2.CHECK STARTING THE ENGINE
1. Turn ignition switch to “ON” position.
2. Move selector lever in “D”,“4”, “3”, “2”, “1” or “R” position.
Stall speedOil pressure does
not rise higher than
the oil pressure for
idle.Possible causes include a sensor malfunction or malfunction in the pressure adjustment function.
For example
• Accelerator pedal position signal malfunction
• TCM breakdown
• Line pressure solenoid malfunction (shorting, sticking in“ ON” state)
• Pressure regulator valve or plug sticking
• Pilot valve sticking or pilot filter clogged
The pressure rises,
but does not enter
the standard posi-
tion.Possible causes include malfunctions in the pressure supply system and malfunction in the pres-
sure adjustment function.
For example
• Accelerator pedal position signal malfunction
• Line pressure solenoid malfunction (sticking, filter clog)
• Pressure regulator valve or plug sticking
• Pilot valve sticking or pilot filter clogged
Only low for a spe-
cific positionPossible causes include an oil pressure leak in a passage or device related to the position after
the pressure is distributed by the manual valve. Judgement Possible cause

TROUBLE DIAGNOSIS
AT-85
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X: Applicable, —: Not applicable
Items (CONSULT-II
screen terms)Malfunction is detected when...TCM self-di-
agnosisOBD-II (DTC)
“A/T” with
CONSULT-IIMIL indicator
lamp*1, “EN-
GINE” with
CONSULT-II or
GST
CAN COMM CIRCUIT • When a malfunction is detected in CAN communications U1000 U1000
STARTER RELAY/
CIRC• If this signal is ON other than in P or N position, this is judged to be a
malfunction.
(And if it is OFF in P or N position, this too is judged to be a malfunction.)P0615 —
TCM • TCM is malfunctioning. P0700 P0700
PNP SW/CIRC• PNP switch 1-4 signals input with impossible pattern
• “P” position is detected from N position without any other position being
detected in between.P0705 P0705
TURBINE REV S/CIRC• TCM does not receive the proper voltage signal from the sensor.
• TCM detects an irregularity only at position of 4th gear for turbine revo-
lution sensor 2.P0717 P0717
VEH SPD SEN/CIR AT
(Revolution sensor)• Signal from vehicle speed sensor A/T (Revolution sensor) not input due
to cut line or the like
• Unexpected signal input during running
• After ignition switch is turned ON, unexpected signal input from vehicle
speed sensor MTR before the vehicle starts movingP0720 P0720
ENGINE SPEED SIG • TCM does not receive the CAN communication signal from the ECM. P0725 —
TCC SOLENOID/CIRC • Normal voltage not applied to solenoid due to cut line, short, or the like P0740 P0740
A/T TCC S/V FNCTN• A/T cannot perform lock-up even if electrical circuit is good.
• TCM detects as irregular by comparing difference value with slip rota-
tion.P0744 P0744*2
L/PRESS SOL/CIRC• Normal voltage not applied to solenoid due to cut line, short, or the like
• TCM detects as irregular by comparing target value with monitor value.P0745 P0745
TP SEN/CIRC A/T• TCM does not receive the proper accelerator pedal position signals (in-
put by CAN communication) from ECM.P1705 P1705
ATF TEMP SEN/CIRC• During running, the ATF temperature sensor signal voltage is exces-
sively high or lowP1710 P0710
VEH SPD SE/CIR·MTR• Signal (CAN communication) from vehicle speed sensor MTR not input
due to cut line or the like
• Unexpected signal input during runningP1721 —
A/T INTERLOCK• Except during shift change, the gear position and ATF pressure switch
states are monitored and comparative judgement made.P1730 P1730
A/T 1ST E/BRAKING• Each ATF pressure switch and solenoid current is monitored and if a
pattern is detected having engine braking 1st gear other than in the "1"
position, a malfunction is detected.P1731 —
I/C SOLENOID/CIRC• Normal voltage not applied to solenoid due to functional malfunction,
cut line, short, or the like
• TCM detects as irregular by comparing target value with monitor value.P1752 P1752
I/C SOLENOID FNCTN • TCM detects that actual gear ratio is irregular, and relation between
gear position and condition of ATF pressure switch 3 is irregular during
depressing accelerator pedal. (Other than during shift change)
• TCM detects that relation between gear position and condition of ATF
pressure switch 3 is irregular during releasing accelerator pedal. (Other
than during shift change)P1754 P1754*2
FR/B SOLENOID/CIRC• Normal voltage not applied to solenoid due to functional malfunction,
cut line, short, or the like
• TCM detects as irregular by comparing target value with monitor value.P1757 P1757

AT-86
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS
*1: Refer to EC-63, "Malfunction Indicator Lamp (MIL)".
*2:These malfunctions cannot be displayed MIL if another malfunction is assigned to MIL.
DATA MONITOR MODE
Display Items List
FR/B SOLENOID FNCT• TCM detects that actual gear ratio is irregular, and relation between
gear position and condition of ATF pressure switch 1 is irregular during
depressing accelerator pedal. (Other than during shift change)
• TCM detects that relation between gear position and condition of ATF
pressure switch 1 is irregular during releasing accelerator pedal. (Other
than during shift change)P1759 P1759*2
D/C SOLENOID/CIRC• Normal voltage not applied to solenoid due to cut line, short, or the like
• TCM detects as irregular by comparing target value with monitor value.P1762 P1762
D/C SOLENOID
FNCTN• TCM detects that actual gear ratio is irregular, and relation between
gear position and condition of ATF pressure switch 5 is irregular during
depressing accelerator pedal. (Other than during shift change)
• TCM detects that relation between gear position and condition of ATF
pressure switch 5 is irregular during releasing accelerator pedal. (Other
than during shift change)P1764 P1764*2
HLR/C SOL/CIRC• Normal voltage not applied to solenoid due to functional malfunction,
cut line, short, or the like
• TCM detects as irregular by comparing target value with monitor value.P1767 P1767
HLR/C SOL FNCTN• TCM detects that actual gear ratio is irregular, and relation between
gear position and condition of ATF pressure switch 6 is irregular during
depressing accelerator pedal. (Other than during shift change)
• TCM detects that relation between gear position and condition of ATF
pressure switch 6 is irregular during releasing accelerator pedal. (Other
than during shift change)P1769 P1769*2
LC/B SOLENOID/CIRC• Normal voltage not applied to solenoid due to functional malfunction,
cut line, short, or the likeP1772 P1772
LC/B SOLENOID FNCT• TCM detects an improper voltage drop when it tries to operate the so-
lenoid valve.
• Condition of ATF pressure switch 2 is different from monitor value, and
relation between gear position and actual gear ratio is irregular.P1774 P1774*2
ATF PRES SW 1/CIRC• TCM detects that actual gear ratio is normal, and relation between gear
position and condition of ATF pressure switch 1 is irregular during de-
pressing accelerator pedal. (Other than during shift change)P1841 —
ATF PRES SW 3/CIRC• TCM detects that actual gear ratio is normal, and relation between gear
position and condition of ATF pressure switch 3 is irregular during de-
pressing accelerator pedal. (Other than during shift change)P1843 —
ATF PRES SW 5/CIRC• TCM detects that actual gear ratio is normal, and relation between gear
position and condition of ATF pressure switch 5 is irregular during de-
pressing accelerator pedal. (Other than during shift change)P1845 —
ATF PRES SW 6/CIRC• TCM detects that actual gear ratio is normal, and relation between gear
position and condition of ATF pressure switch 6 is irregular during de-
pressing accelerator pedal. (Other than during shift change)P1846 —
NO DTC IS DETECTED
FURTHER TESTING
MAY BE REQUIRED• No NG item has been detected. X X Items (CONSULT-II
screen terms)Malfunction is detected when...TCM self-di-
agnosisOBD-II (DTC)
“A/T” with
CONSULT-IIMIL indicator
lamp*1, “EN-
GINE” with
CONSULT-II or
GST

TROUBLE DIAGNOSIS FOR SYMPTOMS
AT-167
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TCM Input/Output Signal Reference Values
Refer to AT-82, "TCM Input/Output Signal Reference Value".
A/T Check Indicator Lamp Does Not Come OnINFOID:0000000003532448
SYMPTOM:
BCWA0501E

AT-168
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS FOR SYMPTOMS
AT CHECK indicator lamp does not come on for about 2 seconds when turning ignition switch to
“ON”.
DIAGNOSTIC PROCEDURE
1.CHECK CAN COMMUNICATION LINE
Perform the self-diagnosis. Refer to AT-83, "
CONSULT-II Function (A/T)".
Is a malfunction in the CAN communication indicated in the results?
YES >> Check CAN communication line. Refer to AT- 9 1.
NO >> GO TO 2.
2.CHECK A/T CHECK INDICATOR LAMP CIRCUIT
Check the combination meter. Refer to DI-5
.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace damaged parts.
3.CHECK TCM POWER SUPPLY AND GROUND CIRCUIT
Check TCM power supply and ground circuit. Refer to AT-158
.
OK or NG
OK >>INSPECTION END
NG >> Repair or replace damaged parts.
Engine Cannot Be Started in "P" or "N" PositionINFOID:0000000003532449
SYMPTOM:
•Engine cannot be started with selector lever in “P” or “N” position.
•Engine can be started with selector lever in “D”or “R” position.
DIAGNOSTIC PROCEDURE
1.CHECK SELF-DIAGNOSIS RESULTS
Perform self-diagnosis. Refer to AT-83, "
CONSULT-II Function (A/T)".
Do the self-diagnosis results indicate PNP switch?
YES >> Check the malfunctioning system. Refer to AT- 9 9.
NO >> GO TO 2.
2.CHECK CONTROL CABLE
Check the control cable.
• Refer to AT-208, "
Checking of A/T Position".
OK or NG
OK >> GO TO 3.
NG >> Adjust control cable. Refer to AT-208, "
Adjustment of A/
T Position".
3.CHECK STARTING SYSTEM
Check the starting system. Refer to SC-9
.
OK or NG
OK >>INSPECTION END
NG >> Repair or replace damaged parts.
In "P" Position, Vehicle Moves When PushedINFOID:0000000003532450
SYMPTOM:
LCIA0345E

AT-208
< SERVICE INFORMATION >
SHIFT CONTROL SYSTEM
Adjustment of A/T Position
INFOID:0000000003532475
1. Loosen nut of control cable.
2. Place PNP switch and selector lever in “P” position.
3. After pushing the control cable in the direction shown with a
force of 9.8 N·m (1kg-m, 2.2 lb-ft), release it. This is in the natu-
ral state, tighten control cable nut to specifications.
Checking of A/T PositionINFOID:0000000003532476
1. Place selector lever in “P” position, and turn ignition switch ON
(engine stop).
2. Make sure selector lever can be shifted to other than “P” position
when brake pedal is depressed. Also make sure selector lever
can be shifted from “P” position only when brake pedal is
depressed.
3. Move the selector lever and check for excessive effort, sticking,
noise or rattle.
4. Confirm the selector lever stops at each position with the feel of
engagement when it is moved through all the positions. Check
whether or not the actual position the selector lever is in
matches the position shown by the shift position indicator and
the transmission body.
5. The method of operating the lever to individual positions correctly should be as shown.
6. Confirm the back-up lamps illuminate only when lever is placed in the “R” position. Confirm the back-up
lamps does not illuminate when selector lever is pushed against “R” position in the “P” or “N” position.
7. Confirm the engine can only be started with the selector lever in the “P” and “N” positions.
8. Make sure transmission is locked completely in “P” position.Control cable nut : 14.5 N·m (1.5 kg-m, 11 ft-lb)
LCIA0345E
LCIA0325E