2009 INFINITI QX56 transmission oil

SYSTEM SYMPTOMTM-139
< SYMPTOM DIAGNOSIS >
CEF
G H
I
J
K L
M A
B
TM
N
O P
NO >> GO TO 2.
2.CHECK A/T FLUID LEVEL
Check A/T fluid level. Refer to TM-179, "Checking the A/T 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 TM-188,
"Inspection and Judgment".
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 TM-203, "Control Valve with TCM and A/T Fluid Temperature Sen-
sor 2".
2. Disassemble A/T. Refer to TM-232, "Disassembly"
.
3. Check the following items:
- Oil pump assembly. Refer to TM-249, "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 TM-203, "Control Valve with TCM and A/T Fluid Temperature Sen-
sor 2".
2. Disassemble A/T. Refer to TM-232, "Disassembly"
.
3. Check the following items:
- Oil pump assembly. Refer to TM-249, "Oil Pump"
.
- Power train system. Refer to TM-232, "Disassembly"
.
- Transmission case. Refer to TM-232, "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 TM-203, "Control Valve with TCM and A/T Fluid Temperature Sensor 2"
.
SAT638A
SAT494G
Revision: December 20092009 QX56

TM-142
< SYMPTOM DIAGNOSIS >
SYSTEM SYMPTOM
DIAGNOSTIC PROCEDURE
1.CHECK SELF-DIAGNOSTIC RESULTS
Perform self-diagnosis. Refer to TM-32, "CONSULT-III Function (TRANSMISSION)"
.
Do the self-diagnostic results indicate torque conv erter clutch solenoid valve, engine speed signal, input
speed sensor, CAN communication?
YES >> Check the malfunctioning system. Refer to TM-64, "Diagnosis Procedure", TM-52, "Diagnosis
Procedure", TM-47, "Diagnosis Procedure", TM-39, "Diagnosis Procedure".
NO >> GO TO 2.
2.CHECK SYMPTOM
Check again. Refer to TM-191, "Cruise Test - Part 1"
.
OK or NG
OK >> INSPECTION END
NG >> GO TO 3.
3.PERFORM TCM INSPECTION
1. Perform TCM input/output signals inspection. Refer to TM-104, "Reference Value"
.
2. If NG, recheck A/T assembly harness connector terminals for damage or loose connection with harness
connector.
OK or NG
OK >> INSPECTION END
NG >> Repair or replace damaged parts.
Engine Speed Does Not Return to IdleINFOID:0000000003772006
SYMPTOM:
When a shift-down is performed, the engine speed does not smoothly return to the idling speed.
DIAGNOSTIC PROCEDURE
1.CHECK A/T FLUID LEVEL
Check A/T fluid level. Refer to TM-179, "Checking the A/T Fluid
(ATF)".
OK or NG
OK >> GO TO 2.
NG >> Refill ATF.
2.CHECK SELF-DIAGNOSTIC RESULTS
Perform self-diagnosis. Refer to TM-32, "CONSULT-III Function (TRANSMISSION)"
.
Do the self-diagnostic results indicate front brake sol enoid valve, direct clutch solenoid valve, accelerator
pedal position sensor, output speed sensor and vehicle speed signal?
YES >> Check the malfunctioning system. Refer to TM-82, "Diagnosis Procedure", TM-84, "Diagnosis
Procedure", EC-374, "Diagnosis Procedure", TM-50, "Diagnosis Procedure", TM-74, "Diagnosis
Procedure".
NO >> GO TO 3.
3.CHECK A/T FLUID CONDITION
1. Remove oil pan. Refer to TM-203, "Control Valve with TCM and A/T Fluid Temperature Sensor 2"
.
SAT638A
Revision: December 20092009 QX56

SYSTEM SYMPTOMTM-147
< SYMPTOM DIAGNOSIS >
CEF
G H
I
J
K L
M A
B
TM
N
O P
NG >> Repair or replace damaged parts.
8.DETECT MALFUNCTIONING ITEM
 Check the malfunction items. If any items are damaged, repair or replace damaged parts. Refer to TM-152,
"Symptom Table" (Symptom No.15).
OK or NG
OK >> GO TO 6.
NG >> Repair or replace damaged parts.
A/T Does Not Shift: 3GR → 2GRINFOID:0000000003772009
SYMPTOM:
When shifted from 33 to 22 position, does not downshift from 3GR to 2GR.
DIAGNOSTIC PROCEDURE
1.CHECK SELF-DIAGNOSIS RESULTS
Perform self-diagnosis. Refer to TM-32, "CONSULT-III Function (TRANSMISSION)"
.
Do the self-diagnosis results i ndicate transmission range switch?
YES >> Check the malfunctioning system. Refer to TM-44, "Diagnosis Procedure".
NO >> GO TO 2.
2.CHECK A/T FLUID LEVEL
Check the A/T fluid level. Refer to TM-179, "Checking the A/T Fluid
(ATF)".
OK or NG
OK >> GO TO 3.
NG >> Refill ATF.
3.CHECK CONTROL CABLE
Check the control cable.
 Refer to TM-195, "Checking of A/T Position"
.
OK or NG
OK >> GO TO 4.
NG >> Adjust control cable. Refer to TM-195, "Adjustment of A/
T Position".
4.CHECK A/T FLUID CONDITION
1. Remove oil pan. Refer to TM-201, "Oil Pan"
.
SAT638A
LCIA0345E
Revision: December 20092009 QX56

SYSTEM SYMPTOMTM-163
< SYMPTOM DIAGNOSIS >
CEF
G H
I
J
K L
M A
B
TM
N
O P30
Slips/Will
Not en-
gage No shock at all or the
clutch slips when vehi-
cle changes speed D4
→
D5. ON vehicle
1. Fluid level and state
TM-179
2. Output speed sensor and vehicle speed signal TM-49,
TM-74
3. Front brake solenoid valve TM-82
4. Direct clutch solenoid valveTM-84
5. CAN communication line LAN-4
6. Line pressure testTM-188
7. Control valve with TCMTM-203
OFF vehicle8. Torque converter
TM-203
9. Oil pump assemblyTM-203
10. Front brake (brake band)TM-203
11. Input clutchTM-203
12. Gear systemTM-203
13. High and low reverse clutchTM-203
31When you press the
accelerator pedal and
shift speed D5→
D4
the engine idles or the
transmission slips. ON vehicle
1. Fluid level and state
TM-179
2. Output speed sensor and vehicle speed signal TM-49,
TM-74
3. Front brake solenoid valve TM-82
4. Direct clutch solenoid valveTM-84
5. CAN communication line LAN-4
6. Line pressure testTM-188
7. Control valve with TCMTM-203
OFF vehicle8. Torque converter
TM-203
9. Oil pump assemblyTM-203
10. Input clutchTM-203
11. Gear systemTM-203
12. High and low reverse clutchTM-203
13. Direct clutchTM-203
No. Items Symptom Condition Diagnostic Item Reference
page
Revision: December 20092009 QX56

TM-164
< SYMPTOM DIAGNOSIS >
SYSTEM SYMPTOM
32Slips/Will
Not en-
gage When you press the
accelerator pedal and
shift speed D4→
D3
the engine idles or the
transmission slips. ON vehicle
1. Fluid level and state
TM-179
2. Output speed sensor and vehicle speed signal TM-49,
TM-74
3. Input clutch solenoid valve TM-80
4. Front brake solenoid valveTM-82
5. CAN communication line LAN-4
6. Line pressure testTM-188
7. Control valve with TCMTM-203
OFF vehicle8. Torque converter
TM-203
9. Oil pump assemblyTM-203
10. 3rd one-way clutchTM-203
11. Gear systemTM-203
12. High and low reverse clutchTM-203
13. Forward one- way clutch (Parts behind drum support is
impossible to perform inspection by disassembly. Refer to
TM-8
, TM-9
TM-203
14. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to TM-8
, TM-9TM-203
33 When you press the
accelerator pedal and
shift speed D3→
D2
the engine idles or the
transmission slips. ON vehicle
1. Fluid level and state
TM-179
2. Output speed sensor and vehicle speed signal TM-49,
TM-74
3. High and low reverse clutch solenoid valve TM-86
4. Direct clutch solenoid valveTM-84
5. CAN communication line LAN-4
6. Line pressure testTM-188
7. Control valve with TCMTM-203
OFF vehicle8. Torque converter
TM-203
9. Oil pump assemblyTM-203
10. 3rd one-way clutchTM-203
11. Gear systemTM-203
12. Direct clutchTM-203
13. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to TM-8
, TM-9TM-203
No. Items Symptom Condition Diagnostic Item Reference
page
Revision: December 20092009 QX56

SYSTEM SYMPTOMTM-165
< SYMPTOM DIAGNOSIS >
CEF
G H
I
J
K L
M A
B
TM
N
O P
34
Slips/Will
Not En-
gage When you press the
accelerator pedal and
shift speed D2→
D1
the engine idles or the
transmission slips. ON vehicle
1. Fluid level and state
TM-179
2. Output speed sensor and vehicle speed signal TM-49,
TM-74
3. Direct clutch solenoid valve TM-84
4. CAN communication line LAN-4
5. Line pressure testTM-188
6. Control valve with TCMTM-203
OFF vehicle7. Torque converter
TM-203
8. Oil pump assemblyTM-203
9. 3rd one-way clutchTM-203
10. 1st one-way clutchTM-203
11. Gear systemTM-203
12. Reverse brakeTM-203
13. Forward one- way clutch (Parts behind drum support is
impossible to perform inspection by disassembly. Refer to
TM-8
, TM-9
TM-203
14. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to TM-8
, TM-9TM-203
35 With selector lever in
“D” position, accelera-
tion is extremely poor. ON vehicle
1. Fluid level and state
TM-179
2. Line pressure testTM-188
3. Accelerator pedal position sensor TM-70
4. CAN communication line LAN-4
5. Transmission range switchTM-44
6. Control cable adjustmentTM-195
7. Control valve with TCMTM-203
OFF vehicle8. Torque converter
TM-232
9. Oil pump assemblyTM-203
10. 1st one-way clutchTM-203
11. Gear systemTM-203
12. Reverse brakeTM-203
13. Forward one- way clutch (Parts behind drum support is
impossible to perform inspection by disassembly. Refer to
TM-8
, TM-9
TM-203
14. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to TM-8
, TM-9TM-203
No. Items Symptom Condition Diagnostic Item Reference
page
Revision: December 20092009 QX56

TM-166
< SYMPTOM DIAGNOSIS >
SYSTEM SYMPTOM
36Slips/Will
Not En-
gage With selector lever in
“R” position
, accelera-
tion is extremely poor. ON vehicle1. Fluid level and state
TM-179
2. Line pressure testTM-188
3. Accelerator pedal position sensor TM-70
4. High and low reverse clutch solenoid valve LAN-4
5. CAN communication lineLAN-4
6. Transmission range switchTM-44
7. Control cable adjustmentTM-195
8. Control valve with TCMTM-203
OFF vehicle9. Gear system
TM-20310. Output shaftTM-203
11. Reverse brakeTM-203
37While starting off by
accelerating in 1st, en-
gine races or slippage
occurs. ON vehicle
1. Fluid level and state
TM-179
2. Line pressure testTM-188
3. Accelerator pedal position sensor TM-70
4. CAN communication line LAN-4
5. Control valve with TCMTM-203
OFF vehicle6. Torque converter
TM-203
7. Oil pump assemblyTM-203
8. 3rd one-way clutchTM-203
9. 1st one-way clutchTM-258
10. Gear systemTM-203
11. Reverse brakeTM-203
12. Forward one- way clutch (Parts behind drum support is
impossible to perform inspection by disassembly. Refer to
TM-8
, TM-9
TM-203
13. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to TM-8
, TM-9TM-203
38 While accelerating in
2nd, engine races or
slippage occurs. ON vehicle
1. Fluid level and state
TM-179
2. Line pressure testTM-188
3. Accelerator pedal position sensor TM-70
4. CAN communication line LAN-4
5. Direct clutch solenoid valveTM-84
6. Control valve with TCMTM-203
OFF vehicle7. Torque converter
TM-203
8. Oil pump assemblyTM-203
9. 3rd one-way clutchTM-203
10. Gear systemTM-203
11. Direct clutchTM-203
12. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to TM-8
, TM-9TM-203
No. Items Symptom Condition Diagnostic Item Reference
page
Revision: December 20092009 QX56

TM-168
< SYMPTOM DIAGNOSIS >
SYSTEM SYMPTOM
41Slips/Will
Not En-
gage While accelerating in
5th, engine races or
slippage occurs.
ON vehicle
1. Fluid level and state
TM-179
2. Line pressure testTM-188
3. Accelerator pedal position sensor TM-70
4. CAN communication line LAN-4
5. Front brake solenoid valveTM-82
6. Control valve with TCMTM-203
OFF vehicle7. Torque converter
TM-203
8. Oil pump assemblyTM-203
9. Front brake (brake band)TM-203
10. Input clutchTM-203
11. Gear systemTM-203
12. High and low reverse clutchTM-203
42 Slips at lock-up.ON vehicle1. Fluid level and state
TM-179
2. Line pressure testTM-188
3. Engine speed signal TM-52
4. Input speed sensorTM-47
5. Torque converter clutch solenoid valveTM-64
6. CAN communication line LAN-4
7. Control valve with TCMTM-203
OFF vehicle8. Torque converter
TM-2039. Oil pump assemblyTM-203
43No creep at all.
Refer to
TM-124, "Ve-
hicle Does Not Creep
Backward in "R" Posi-
tion", TM-126, "Vehi-
cle Does Not Creep
Forward in "D" Posi-
tion"
ON vehicle 1. Fluid level and state
TM-179
2. Line pressure testTM-188
3. Accelerator pedal position sensor TM-70
4. Direct clutch solenoid valveTM-84
5. Transmission range switchTM-44
6. CAN communication line LAN-4
7. Control cable adjustmentTM-195
8. Control valve with TCMTM-203
OFF vehicle9. Torque converter
TM-203
10. Oil pump assemblyTM-203
11. 1st one-way clutchTM-203
12. Gear systemTM-203
13. Reverse brakeTM-203
14. Direct clutchTM-203
15. Forward one- way clutch (Parts behind drum support is
impossible to perform inspection by disassembly. Refer to
TM-8
, TM-9
TM-203
16. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to TM-8
, TM-9TM-203
No. Items Symptom Condition Diagnostic Item Reference
page
Revision: December 20092009 QX56