2009 INFINITI QX56 engine

SYSTEM SYMPTOMTM-153
< SYMPTOM DIAGNOSIS >
CEF
G H
I
J
K L
M A
B
TM
N
O P
No. Items Symptom Condition Diagnostic Item Reference
page
1
Shift
Shock Large shock. (“N”
→“
D” position)
Refer to TM-122,
"Large Shock("N" to
"D" Position)" . ON vehicle 1. Engine idle speed
EC-17
2. Engine speed signalTM-52
3. Accelerator pedal position sensorTM-70
4. Control cable adjustmentTM-195
5. ATF temperature sensor TM-72
6. Front brake solenoid valveTM-82
7. CAN communication line LAN-4
8. Fluid level and stateTM-179
9. Line pressure testTM-188
10. Control valve with TCMTM-203
OFF vehicle11. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to
TM-8, TM-9 . TM-232
2 Shock is too large
when changing D1→

D
2. ON vehicle1. Accelerator pedal position sensor
TM-70
2. Control cable adjustmentTM-195
3. Direct clutch solenoid valve TM-84
4. CAN communication line LAN-4
5. Engine speed signalTM-52
6. Input speed sensorTM-47
7. Output speed sensor and vehicle speed signalTM-49,
TM-74
8. Fluid level and state TM-179
9. Control valve with TCMTM-203
OFF vehicle 10. Direct clutch TM-265
3Shock is too large
when changing D2→

D
3. ON vehicle1. Accelerator pedal position sensor
TM-70
2. Control cable adjustmentTM-195
3. High and low reverse clutch solenoid valve TM-86
4. CAN communication line LAN-4
5. Engine speed signalTM-52
6. Input speed sensorTM-47
7. Output speed sensor and vehicle speed signalTM-49,
TM-74
8. Fluid level and state TM-179
9. Control valve with TCMTM-203
OFF vehicle 10. High and low reverse clutch TM-263
Revision: December 20092009 QX56

TM-154
< SYMPTOM DIAGNOSIS >
SYSTEM SYMPTOM
4Shift
Shock Shock is too large
when changing D3→

D
4. ON vehicle1. Accelerator pedal position sensor
TM-70
2. Control cable adjustmentTM-195
3. Input clutch solenoid valve TM-80
4. CAN communication line LAN-4
5. Engine speed signalTM-52
6. Input speed sensorTM-47
7. Output speed sensor and vehicle speed signalTM-49,
TM-74
8. Fluid level and state TM-179
9. Control valve with TCMTM-203
OFF vehicle 10. Input clutch TM-253
5Shock is too large
when changing D4→

D
5. ON vehicle1. Accelerator pedal position sensor
TM-70
2. Control cable adjustmentTM-195
3. Front brake solenoid valve TM-82
4. CAN communication line LAN-4
5. Engine speed signalTM-52
6. Input speed sensorTM-47
7. Output speed sensor and vehicle speed signalTM-49,
TM-74
8. Fluid level and state TM-179
9. Control valve with TCMTM-203
OFF vehicle10. Front brake (brake band)
TM-22011. Input clutchTM-253
6Shock is too large for
downshift when accel-
erator pedal is
pressed. ON vehicle1. Accelerator pedal position sensor
TM-70
2. Control cable adjustmentTM-195
3. CAN communication line LAN-4
4. Engine speed signalTM-52
5. Input speed sensorTM-47
6. Output speed sensor and vehicle speed signalTM-49,
TM-74
7. Fluid level and state TM-179
8. Control valve with TCMTM-203
OFF vehicle9. Front brake (brake band)
TM-22010. Input clutchTM-253
11. High and low reverse clutchTM-263
12. Direct clutchTM-265
No. Items Symptom Condition Diagnostic Item Reference
page
Revision: December 20092009 QX56

SYSTEM SYMPTOMTM-155
< SYMPTOM DIAGNOSIS >
CEF
G H
I
J
K L
M A
B
TM
N
O P
7
Shift
Shock Shock is too large for
upshift when accelera-
tor pedal is released.
ON vehicle1. Accelerator pedal position sensor
TM-70
2. Control cable adjustmentTM-195
3. Engine speed signal TM-52
4. CAN communication line LAN-4
5. Input speed sensorTM-47
6. Output speed sensor and vehicle speed signalTM-49,
TM-74
7. Fluid level and state TM-179
8. Control valve with TCMTM-203
OFF vehicle9. Front brake (brake band)
TM-22010. Input clutchTM-253
11. High and low reverse clutchTM-263
12. Direct clutchTM-265
8Shock is too large for
lock-up. ON vehicle1. Accelerator pedal position sensor
TM-70
2. Control cable adjustmentTM-195
3. Engine speed signal TM-52
4. CAN communication line LAN-4
5. Input speed sensorTM-47
6. Output speed sensor and vehicle speed signalTM-49,
TM-74
7. Torque converter clutch solenoid valve TM-64
8. Fluid level and stateTM-179
9. Control valve with TCMTM-203
OFF vehicle 10. Torque converter TM-203
9Shock is too large dur-
ing engine brake. ON vehicle
1. Accelerator pedal position sensor
TM-70
2. Control cable adjustmentTM-195
3. CAN communication line LAN-4
4. Fluid level and stateTM-179
5. Control valve with TCMTM-203
OFF vehicle6. Front brake (brake band)
TM-2037. Input clutchTM-203
8. High and low reverse clutchTM-203
9. Direct clutchTM-203
No. Items Symptom Condition Diagnostic Item Reference
page
Revision: December 20092009 QX56

TM-160
< SYMPTOM DIAGNOSIS >
SYSTEM SYMPTOM
22Slips/Will
Not En-
gage When “D” position, re-
mains in 5GR.
ON vehicle1. 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. Line pressure testTM-188
5. CAN communication line LAN-4
6. Control valve with TCMTM-203
OFF vehicle7. Front brake (brake band)
TM-2038. Input clutchTM-203
9. Gear systemTM-203
10. High and low reverse clutchTM-203
23Vehicle cannot be
started from D
1.
Refer to TM-129, "Ve-
hicle Cannot Be Start-
ed from D1". ON vehicle
1. Fluid level and state
TM-179
2. Accelerator pedal position sensor TM-70
3. Line pressure testTM-188
4. CAN communication line LAN-4
5. Control valve with TCMTM-203
OFF vehicle6. Torque converter
TM-203
7. Oil pump assemblyTM-249
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 im-
possible 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
24 Does not lock-up.
Refer to
TM-138, "A/T Does Not Perform
Lock-up"
ON vehicle 1. 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
No. Items Symptom Condition Diagnostic Item Reference
page
Revision: December 20092009 QX56

SYSTEM SYMPTOMTM-161
< SYMPTOM DIAGNOSIS >
CEF
G H
I
J
K L
M A
B
TM
N
O P
25
Slips/Will
Not en-
gage Does not hold lock-up
condition.
Refer to
TM-140, "A/T
Does Not Hold Lock-
up Condition". ON vehicle 1. 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
26Lock-up is not re-
leased.
Refer to
TM-141,
"Lock-up Is Not Re-
leased". 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
27No shock at all or the
clutch slips when vehi-
cle changes speed D1
→
D2. 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. 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

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