2007 INFINITI QX56 automatic transmission

AT-178
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS FOR SYMPTOMS
NO >> GO TO 3.
3.CHECK ACCELERATOR PEDAL POSITION (APP) SENSOR
Check accelerator pedal position (APP) sensor. Refer to AT- 11 7
OK or NG
OK >> GO TO 4.
NG >> Repair or replace accelerator pedal position (APP) sensor.
4.CHECK A/T FLUID LEVEL
Check A/T fluid level. Refer to AT-13, "
Checking Automatic Trans-
mission Fluid (ATF)".
OK or NG
OK >> GO TO 5.
NG >> Refill ATF.
5.CHECK LINE PRESSURE
Check line pressure at the engine stall point. Refer to AT-51,
"Inspections Before Trouble Diagnosis".
OK or NG
OK >> GO TO 8.
NG - 1 >> Line pressure high. GO TO 6.
NG - 2 >> Line pressure low. GO TO 7.
6.DETECT MALFUNCTIONING ITEM
1. Check control valve with TCM. Refer to AT-210, "
Control Valve with TCM and A/T Fluid Temperature Sen-
sor 2".
2. Disassemble A/T. Refer to AT-240, "
Disassembly".
3. Check the following items:
- Oil pump assembly. Refer to AT-258, "
Oil Pump".
OK or NG
OK >> GO TO 8.
NG >> Repair or replace damaged parts.
7.DETECT MALFUNCTIONING ITEM
1. Check control valve with TCM. Refer to AT-210, "
Control Valve with TCM and A/T Fluid Temperature Sen-
sor 2".
2. Disassemble A/T. Refer to AT-240, "
Disassembly".
3. Check the following items:
- Oil pump assembly. Refer to AT-258, "
Oil Pump".
- Power train system. Refer to AT-240, "
Disassembly".
- Transmission case. Refer to AT-240, "
Disassembly".
OK or NG
OK >> GO TO 8.
NG >> Repair or replace damaged parts.
8.CHECK A/T FLUID CONDITION
1. Remove oil pan. Refer to AT-210, "
Control Valve with TCM and A/T Fluid Temperature Sensor 2".
SAT638A
SAT494G

AT-180
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS FOR SYMPTOMS
Do the self-diagnostic results indicate ATF pressure switch 5, direct clutch solenoid valve, accelerator pedal
position sensor, vehicle speed sensor A/T (revolution sensor) and vehicle speed sensor MTR?
YES >> Check the malfunctioning system. Refer to AT-154' AT-138' AT- 11 7' AT-105, AT-124.
NO >> GO TO 3.
3.CHECK A/T FLUID LEVEL
Check A/T fluid level. Refer to AT-13, "
Checking Automatic Trans-
mission Fluid (ATF)".
OK or NG
OK >> GO TO 4.
NG >> Refill ATF.
4.CHECK LINE PRESSURE
Check line pressure at the engine stall point. Refer to AT-51,
"Inspections Before Trouble Diagnosis".
OK or NG
OK >> GO TO 7.
NG - 1 >> Line pressure high. GO TO 5.
NG - 2 >> Line pressure low. GO TO 6.
5.DETECT MALFUNCTIONING ITEM
1. Check control valve with TCM. Refer to AT-210, "
Control Valve with TCM and A/T Fluid Temperature Sen-
sor 2".
2. Disassemble A/T. Refer to AT-240, "
Disassembly".
3. Check the following items:
- Oil pump assembly. Refer to AT-258, "
Oil Pump".
OK or NG
OK >> GO TO 7.
NG >> Repair or replace damaged parts.
6.DETECT MALFUNCTIONING ITEM
1. Check control valve with TCM. Refer to AT-210, "
Control Valve with TCM and A/T Fluid Temperature Sen-
sor 2".
2. Disassemble A/T. Refer to AT-240, "
Disassembly".
3. Check the following items:
- Oil pump assembly. Refer to AT-258, "
Oil Pump".
- Power train system. Refer to AT-240, "
Disassembly".
- Transmission case. Refer to AT-240, "
Disassembly".
OK or NG
OK >> GO TO 7.
NG >> Repair or replace damaged parts.
7.CHECK A/T FLUID CONDITION
1. Remove oil pan. Refer to AT-210, "
Control Valve with TCM and A/T Fluid Temperature Sensor 2".
SAT638A
SAT494G

AT-182
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS FOR SYMPTOMS
Do the self-diagnostic results indicate ATF pressure switch 6, high and low reverse clutch solenoid valve,
accelerator pedal position sensor, vehicle speed sensor A/T (revolution sensor) and vehicle speed sensor
MTR?
YES >> Check the malfunctioning system. Refer to AT-156' AT-142' AT- 11 7' AT-105' AT-124.
NO >> GO TO 3.
3.CHECK A/T FLUID LEVEL
Check A/T fluid level. Refer to AT-13, "
Checking Automatic Trans-
mission Fluid (ATF)".
OK or NG
OK >> GO TO 4.
NG >> Refill ATF.
4.CHECK LINE PRESSURE
Check line pressure at the engine stall point. Refer to AT-51,
"Inspections Before Trouble Diagnosis".
OK or NG
OK >> GO TO 7.
NG - 1 >> Line pressure high. GO TO 5.
NG - 2 >> Line pressure low. GO TO 6.
5.DETECT MALFUNCTIONING ITEM
1. Check control valve with TCM. Refer to AT-210, "
Control Valve with TCM and A/T Fluid Temperature Sen-
sor 2".
2. Disassemble A/T. Refer to AT-240, "
Disassembly".
3. Check the following items:
- Oil pump assembly. Refer to AT-258, "
Oil Pump".
OK or NG
OK >> GO TO 7.
NG >> Repair or replace damaged parts.
6.DETECT MALFUNCTIONING ITEM
1. Check control valve with TCM. Refer to AT-210, "
Control Valve with TCM and A/T Fluid Temperature Sen-
sor 2".
2. Disassemble A/T. Refer to AT-240, "
Disassembly".
3. Check the following items:
- Oil pump assembly. Refer to AT-258, "
Oil Pump".
- Power train system. Refer to AT-240, "
Disassembly".
- Transmission case. Refer to AT-240, "
Disassembly".
OK or NG
OK >> GO TO 7.
NG >> Repair or replace damaged parts.
7.CHECK A/T FLUID CONDITION
1. Remove oil pan. Refer to AT-210, "
Control Valve with TCM and A/T Fluid Temperature Sensor 2".
SAT638A
SAT494G

AT-184
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS FOR SYMPTOMS
Do the self-diagnostic results indicate ATF pressure switch 1, ATF pressure switch 3, front brake solenoid
valve, input clutch solenoid valve, accelerator pedal position sensor, vehicle speed sensor A/T (revolution sen-
sor) and vehicle speed sensor MTR?
YES >> Check the malfunctioning system. Refer to AT-150, AT- 1 5 2' AT-130, AT-134, AT- 11 7' AT-105' AT-
124.
NO >> GO TO 3.
3.CHECK A/T FLUID LEVEL
Check A/T fluid level. Refer to AT-13, "
Checking Automatic Trans-
mission Fluid (ATF)".
OK or NG
OK >> GO TO 4.
NG >> Refill ATF.
4.CHECK LINE PRESSURE
Check line pressure at the engine stall point. Refer to AT-51,
"Inspections Before Trouble Diagnosis".
OK or NG
OK >> GO TO 7.
NG - 1 >> Line pressure high. GO TO 5.
NG - 2 >> Line pressure low. GO TO 6.
5.DETECT MALFUNCTIONING ITEM
1. Check control valve with TCM. Refer to AT-210, "
Control Valve with TCM and A/T Fluid Temperature Sen-
sor 2".
2. Disassemble A/T. Refer to AT-240, "
Disassembly".
3. Check the following items:
- Oil pump assembly. Refer to AT-258, "
Oil Pump".
OK or NG
OK >> GO TO 7.
NG >> Repair or replace damaged parts.
6.DETECT MALFUNCTIONING ITEM
1. Check control valve with TCM. Refer to AT-210, "
Control Valve with TCM and A/T Fluid Temperature Sen-
sor 2".
2. Disassemble A/T. Refer to AT-240, "
Disassembly".
3. Check the following items:
- Oil pump assembly. Refer to AT-258, "
Oil Pump".
- Power train system. Refer to AT-240, "
Disassembly".
- Transmission case. Refer to AT-240, "
Disassembly".
OK or NG
OK >> GO TO 7.
NG >> Repair or replace damaged parts.
7.CHECK A/T FLUID CONDITION
1. Remove oil pan. Refer to AT-210, "
Control Valve with TCM and A/T Fluid Temperature Sensor 2".
SAT638A
SAT494G

AT-186
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS FOR SYMPTOMS
Do the self-diagnostic results indicate ATF pressure switch 1, ATF pressure switch 5, front brake solenoid
valve, direct clutch solenoid valve, accelerator pedal position sensor, turbine revolution sensor, vehicle speed
sensor A/T (revolution sensor) and vehicle speed sensor MTR?
YES >> Check the malfunctioning system. Refer to AT-150' AT-154, AT-134' AT-138' AT- 11 7' AT-103, AT-
105' AT-124.
NO >> GO TO 3.
3.CHECK A/T FLUID LEVEL
Check A/T fluid level. Refer to AT-13, "
Checking Automatic Trans-
mission Fluid (ATF)".
OK or NG
OK >> GO TO 4.
NG >> Refill ATF.
4.CHECK LINE PRESSURE
Check line pressure at the engine stall point. Refer to AT-51,
"Inspections Before Trouble Diagnosis".
OK or NG
OK >> GO TO 7.
NG - 1 >> Line pressure high. GO TO 5.
NG - 2 >> Line pressure low. GO TO 6.
5.DETECT MALFUNCTIONING ITEM
1. Check control valve with TCM. Refer to AT-210, "
Control Valve with TCM and A/T Fluid Temperature Sen-
sor 2".
2. Disassemble A/T. Refer to AT-240, "
Disassembly".
3. Check the following items:
- Oil pump assembly. Refer to AT-258, "
Oil Pump".
OK or NG
OK >> GO TO 7.
NG >> Repair or replace damaged parts.
6.DETECT MALFUNCTIONING ITEM
1. Check control valve with TCM. Refer to AT-210, "
Control Valve with TCM and A/T Fluid Temperature Sen-
sor 2".
2. Disassemble A/T. Refer to AT-240, "
Disassembly".
3. Check the following items:
- Oil pump assembly. Refer to AT-258, "
Oil Pump".
- Power train system. Refer to AT-240, "
Disassembly".
- Transmission case. Refer to AT-240, "
Disassembly".
OK or NG
OK >> GO TO 7.
NG >> Repair or replace damaged parts.
7.CHECK A/T FLUID CONDITION
1. Remove oil pan. Refer to AT-210, "
Control Valve with TCM and A/T Fluid Temperature Sensor 2".
SAT638A
SAT494G

AT-188
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS FOR SYMPTOMS
Check A/T fluid level. Refer to AT-13, "Checking Automatic Trans-
mission Fluid (ATF)".
OK or NG
OK >> GO TO 3.
NG >> Refill ATF.
3.CHECK LINE PRESSURE
Check line pressure at the engine stall point. Refer to AT-51,
"Inspections Before Trouble Diagnosis".
OK or NG
OK >> GO TO 6.
NG - 1 >> Line pressure high. GO TO 4.
NG - 2 >> Line pressure low. GO TO 5.
4.DETECT MALFUNCTIONING ITEM
1. Check control valve with TCM. Refer to AT-210, "
Control Valve with TCM and A/T Fluid Temperature Sen-
sor 2".
2. Disassemble A/T. Refer to AT-240, "
Disassembly".
3. Check the following items:
- Oil pump assembly. Refer to AT-258, "
Oil Pump".
OK or NG
OK >> GO TO 7.
NG >> Repair or replace damaged parts.
5.DETECT MALFUNCTIONING ITEM
1. Check control valve with TCM. Refer to AT-210, "
Control Valve with TCM and A/T Fluid Temperature Sen-
sor 2".
2. Disassemble A/T. Refer to AT-240, "
Disassembly".
3. Check the following items:
- Oil pump assembly. Refer to AT-258, "
Oil Pump".
- Power train system. Refer to AT-240, "
Disassembly".
- Transmission case. Refer to AT-240, "
Disassembly".
OK or NG
OK >> GO TO 7.
NG >> Repair or replace damaged parts.
6.CHECK A/T FLUID CONDITION
1. Remove oil pan. Refer to AT-210, "
Control Valve with TCM and A/T Fluid Temperature Sensor 2".
SAT638A
SAT494G

TROUBLE DIAGNOSIS FOR SYMPTOMS
AT-193
< SERVICE INFORMATION >
D
E
F
G
H
I
J
K
L
MA
B
AT
N
O
P
1. Turn ignition switch “ON”.
2. Select "ECU INPUT SIGNALS" in "DATA MONITOR" mode for
"A/T" with CONSULT-II.
3. Read out "OD CONT SW" switch moving selector lever to each
position.
Without CONSULT-II
1. Turn ignition switch “ON”. (Do not start engine)
2. Check voltage between A/T device harness connector terminal
and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace damaged parts.
3.CHECK A/T FLUID LEVEL
Check the A/T fluid level. Refer to AT-13, "
Checking Automatic
Transmission Fluid (ATF)".
OK or NG
OK >> GO TO 4.
NG >> Refill ATF.
4.CHECK CONTROL CABLE
Check the control cable.
• Refer to AT-208, "
Checking of A/T Position".
OK or NG
OK >> GO TO 5.
NG >> Adjust control cable. Refer to AT-208, "
Adjustment of A/
T Position".
Monitor item Condition Display value
OD CONT SWWhen setting the selector
lever to "4" and "3" posi-
tion.ON
When setting selector le-
ver to other positions.OFF
LCIA0339E
Item Connector No. Terminal No. ConditionData
(Approx.)
4th position
switchM203 1 - GroundWhen setting
the selector le-
ver to "4" and
"3" position.0V
When setting
selector lever
to other posi-
tions.Battery volt-
age
LCIA0340E
SAT638A
LCIA0345E

TROUBLE DIAGNOSIS FOR SYMPTOMS
AT-195
< SERVICE INFORMATION >
D
E
F
G
H
I
J
K
L
MA
B
AT
N
O
P
Check the A/T fluid level. Refer to AT-13, "Checking Automatic
Transmission Fluid (ATF)".
OK or NG
OK >> GO TO 3.
NG >> Refill ATF.
3.CHECK CONTROL CABLE
Check the control cable.
• Refer to AT-208, "
Checking of A/T Position".
OK or NG
OK >> GO TO 4.
NG >> Adjust control cable. Refer to AT-208, "
Adjustment of A/
T Position".
4.CHECK A/T FLUID CONDITION
1. Remove oil pan. Refer to AT-210, "
Control Valve with TCM and A/T Fluid Temperature Sensor 2".
2. Check A/T fluid condition. Refer to AT-51, "
Inspections Before
Trouble Diagnosis".
OK or NG
OK >> GO TO 5.
NG >> GO TO 8.
5.DETECT MALFUNCTIONING ITEM
• Check the malfunction items. If any items are damaged, repair or replace damaged parts. Refer to AT-60,
"Symptom Chart" (Symptom No.15).
OK or NG
OK >> GO TO 6.
NG >> Repair or replace damaged parts.
6.CHECK SYMPTOM
Check again. Refer to AT-59, "
Cruise Test - Part 3".
OK or NG
OK >>INSPECTION END
NG >> GO TO 7.
7.PERFORM TCM INSPECTION
1. Perform TCM input/output signals inspection. Refer to AT-82, "
TCM Input/Output Signal Reference
Va l u e".
2. If NG, recheck A/T assembly harness connector terminals for damage or loose connection with harness
connector.
OK or NG
SAT638A
LCIA0345E
SCIA5199E