2010 INFINITI QX56 engine

SYSTEM SYMPTOMTM-121
< SYMPTOM DIAGNOSIS >
CEF
G H
I
J
K L
M A
B
TM
N
O P
SYMPTOM DIAGNOSIS
SYSTEM SYMPTOM
Symptom TableINFOID:0000000005148715
• The diagnostics item numbers s how the sequence for inspection. Inspect in order from item 1.
• Overhaul and inspect inside the A/T only if A/T fluid condition is NG. Refer to TM-148, "
Checking the
A/T Fluid (ATF)".
No. ItemsSymptom Condition Diagnostic ItemReference
page
1
Shift
Shock Large shock. (“N”
→“
D” position) ON vehicle1. Engine idle speed
EC-17
2. Engine speed signalTM-53
3. Accelerator pedal position sensorTM-71
4. Control cable adjustmentTM-164
5. ATF temperature sensor TM-73
6. Front brake solenoid valveTM-84
7. CAN communication line LAN-4
8. Fluid level and stateTM-148
9. Line pressure testTM-157
10. Control valve with TCMTM-172
OFF vehicle11. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to
TM-8, TM-9 . TM-204
2 Shock is too large
when changing D1→
D
2. ON vehicle1. Accelerator pedal position sensor
TM-71
2. Control cable adjustmentTM-164
3. Direct clutch solenoid valve TM-86
4. CAN communication line LAN-4
5. Engine speed signalTM-53
6. Input speed sensorTM-48
7. Output speed sensor and vehicle speed signalTM-50,
TM-76
8. Fluid level and state TM-148
9. Control valve with TCMTM-172
OFF vehicle 10. Direct clutch TM-239
3Shock is too large
when changing D2→
D
3. ON vehicle1. Accelerator pedal position sensor
TM-71
2. Control cable adjustmentTM-164
3. High and low reverse clutch solenoid valve TM-88
4. CAN communication line LAN-4
5. Engine speed signalTM-53
6. Input speed sensorTM-48
7. Output speed sensor and vehicle speed signalTM-50,
TM-76
8. Fluid level and state TM-148
9. Control valve with TCMTM-172
OFF vehicle 10. High and low reverse clutch TM-237
Revision: April 20092010 QX56

TM-122
< SYMPTOM DIAGNOSIS >
SYSTEM SYMPTOM
4Shift
Shock Shock is too large
when changing D3→
D
4. ON vehicle1. Accelerator pedal position sensor
TM-71
2. Control cable adjustmentTM-164
3. Input clutch solenoid valve TM-82
4. CAN communication line LAN-4
5. Engine speed signalTM-53
6. Input speed sensorTM-48
7. Output speed sensor and vehicle speed signalTM-50,
TM-76
8. Fluid level and state TM-148
9. Control valve with TCMTM-172
OFF vehicle 10. Input clutch TM-227
5Shock is too large
when changing D4→
D
5. ON vehicle1. Accelerator pedal position sensor
TM-71
2. Control cable adjustmentTM-164
3. Front brake solenoid valve TM-84
4. CAN communication line LAN-4
5. Engine speed signalTM-53
6. Input speed sensorTM-48
7. Output speed sensor and vehicle speed signalTM-50,
TM-76
8. Fluid level and state TM-148
9. Control valve with TCMTM-172
OFF vehicle10. Front brake (brake band)
TM-19211. Input clutchTM-227
6Shock is too large for
downshift when accel-
erator pedal is
pressed. ON vehicle1. Accelerator pedal position sensor
TM-71
2. Control cable adjustmentTM-164
3. CAN communication line LAN-4
4. Engine speed signalTM-53
5. Input speed sensorTM-48
6. Output speed sensor and vehicle speed signalTM-50,
TM-76
7. Fluid level and state TM-148
8. Control valve with TCMTM-172
OFF vehicle9. Front brake (brake band)
TM-19210. Input clutchTM-227
11. High and low reverse clutchTM-237
12. Direct clutchTM-239
No. ItemsSymptom Condition Diagnostic ItemReference
page
Revision: April 20092010 QX56

SYSTEM SYMPTOMTM-123
< 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-71
2. Control cable adjustmentTM-164
3. Engine speed signal TM-53
4. CAN communication line LAN-4
5. Input speed sensorInput speed sensorTM-48
6. Output speed sensor and vehicle speed signalTM-50,
TM-76
7. Fluid level and state TM-148
8. Control valve with TCMTM-172
OFF vehicle9. Front brake (brake band)
TM-19210. Input clutchTM-227
11. High and low reverse clutchTM-237
12. Direct clutchTM-239
8Shock is too large for
lock-up. ON vehicle1. Accelerator pedal position sensor
TM-71
2. Control cable adjustmentTM-164
3. Engine speed signal TM-53
4. CAN communication line LAN-4
5. Input speed sensorTM-48
6. Output speed sensor and vehicle speed signalTM-50,
TM-76
7. Torque converter clutch solenoid valve TM-65
8. Fluid level and stateTM-148
9. Control valve with TCMTM-172
OFF vehicle 10. Torque converter TM-172
9Shock is too large dur-
ing engine brake. ON vehicle
1. Accelerator pedal position sensor
TM-71
2. Control cable adjustmentTM-164
3. CAN communication line LAN-4
4. Fluid level and stateTM-148
5. Control valve with TCMTM-172
OFF vehicle6. Front brake (brake band)
TM-1727. Input clutchTM-172
8. High and low reverse clutchTM-172
9. Direct clutchTM-172
No. ItemsSymptom Condition Diagnostic ItemReference
page
Revision: April 20092010 QX56

TM-128
< SYMPTOM DIAGNOSIS >
SYSTEM SYMPTOM
22Slips/Will
Not En-
gage When “D” position, re-
mains in 5GR.
ON vehicle1. Fluid level and state
TM-148
2. Output speed sensor and vehicle speed signal TM-50,
TM-76
3. Front brake solenoid valve TM-84
4. Line pressure testTM-157
5. CAN communication line LAN-4
6. Control valve with TCMTM-172
OFF vehicle7. Front brake (brake band)
TM-1728. Input clutchTM-172
9. Gear systemTM-172
10. High and low reverse clutchTM-172
23Vehicle cannot be
started from D1.ON vehicle
1. Fluid level and state
TM-148
2. Accelerator pedal position sensor TM-71
3. Line pressure testTM-157
4. CAN communication line LAN-4
5. Control valve with TCMTM-172
OFF vehicle6. Torque converter
TM-172
7. Oil pump assemblyTM-223
8. 3rd one-way clutchTM-172
9. 1st one-way clutchTM-232
10. Gear systemTM-172
11. Reverse brakeTM-172
12. Forward one-way clutch (Parts behind drum support is im-
possible to perform inspection by disassembly. Refer to TM-
8, TM-9. TM-172
13. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to
TM-8
, TM-9. TM-172
24
Does not lock-up. ON vehicle1. Fluid level and state
TM-148
2. Line pressure testTM-157
3. Engine speed signal TM-53
4. Input speed sensorTM-48
5. Torque converter clutch solenoid valveTM-65
6. CAN communication line LAN-4
7. Control valve with TCMTM-172
OFF vehicle8. Torque converter
TM-1729. Oil pump assemblyTM-172
No. ItemsSymptom Condition Diagnostic ItemReference
page
Revision: April 20092010 QX56

SYSTEM SYMPTOMTM-129
< 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.
ON vehicle1. Fluid level and state
TM-148
2. Line pressure testTM-157
3. Engine speed signal TM-53
4. Input speed sensorTM-48
5. Torque converter clutch solenoid valveTM-65
6. CAN communication line LAN-4
7. Control valve with TCMTM-172
OFF vehicle8. Torque converter
TM-1729. Oil pump assemblyTM-172
26Lock-up is not re-
leased. ON vehicle1. Fluid level and state
TM-148
2. Line pressure testTM-157
3. Engine speed signal TM-53
4. Input speed sensorTM-48
5. Torque converter clutch solenoid valveTM-65
6. CAN communication line LAN-4
7. Control valve with TCMTM-172
OFF vehicle8. Torque converter
TM-1729. Oil pump assemblyTM-172
27No shock at all or the
clutch slips when vehi-
cle changes speed D1
→
D2. ON vehicle
1. Fluid level and state
TM-148
2. Output speed sensor and vehicle speed signal TM-50,
TM-76
3. Direct clutch solenoid valve TM-86
4. CAN communication line LAN-4
5. Line pressure testTM-157
6. Control valve with TCMTM-172
OFF vehicle7. Torque converter
TM-172
8. Oil pump assemblyTM-172
9. 3rd one-way clutchTM-172
10. Gear systemTM-172
11. Direct clutchTM-172
12. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to TM-8
, TM-9. TM-172
No. Items
Symptom Condition Diagnostic ItemReference
page
Revision: April 20092010 QX56

SYSTEM SYMPTOMTM-131
< 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-148
2. Output speed sensor and vehicle speed signal TM-50,
TM-76
3. Front brake solenoid valve TM-84
4. Direct clutch solenoid valveTM-86
5. CAN communication line LAN-4
6. Line pressure testTM-157
7. Control valve with TCMTM-172
OFF vehicle8. Torque converter
TM-172
9. Oil pump assemblyTM-172
10. Front brake (brake band)TM-172
11. Input clutchTM-172
12. Gear systemTM-172
13. High and low reverse clutchTM-172
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-148
2. Output speed sensor and vehicle speed signal TM-50,
TM-76
3. Front brake solenoid valve TM-84
4. Direct clutch solenoid valveTM-86
5. CAN communication line LAN-4
6. Line pressure testTM-157
7. Control valve with TCMTM-172
OFF vehicle8. Torque converter
TM-172
9. Oil pump assemblyTM-172
10. Input clutchTM-172
11. Gear systemTM-172
12. High and low reverse clutchTM-172
13. Direct clutchTM-172
No. ItemsSymptom Condition Diagnostic ItemReference
page
Revision: April 20092010 QX56

TM-132
< 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-148
2. Output speed sensor and vehicle speed signal TM-50,
TM-76
3. Input clutch solenoid valve TM-82
4. Front brake solenoid valveTM-84
5. CAN communication line LAN-4
6. Line pressure testTM-157
7. Control valve with TCMTM-172
OFF vehicle8. Torque converter
TM-172
9. Oil pump assemblyTM-172
10. 3rd one-way clutchTM-172
11. Gear systemTM-172
12. High and low reverse clutchTM-172
13. Forward one- way clutch (Parts behind drum support is
impossible to perform inspection by disassembly. Refer to
TM-8
, TM-9. TM-172
14. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to
TM-8
, TM-9. TM-172
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-148
2. Output speed sensor and vehicle speed signal TM-50,
TM-76
3. High and low reverse clutch solenoid valve TM-88
4. Direct clutch solenoid valveTM-86
5. CAN communication line LAN-4
6. Line pressure testTM-157
7. Control valve with TCMTM-172
OFF vehicle8. Torque converter
TM-172
9. Oil pump assemblyTM-172
10. 3rd one-way clutchTM-172
11. Gear systemTM-172
12. Direct clutchTM-172
13. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to TM-8
, TM-9. TM-172
No. Items
Symptom Condition Diagnostic ItemReference
page
Revision: April 20092010 QX56

SYSTEM SYMPTOMTM-133
< 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-148
2. Output speed sensor and vehicle speed signal TM-50,
TM-76
3. Direct clutch solenoid valve TM-86
4. CAN communication line LAN-4
5. Line pressure testTM-157
6. Control valve with TCMTM-172
OFF vehicle7. Torque converter
TM-172
8. Oil pump assemblyTM-172
9. 3rd one-way clutchTM-172
10. 1st one-way clutchTM-172
11. Gear systemTM-172
12. Reverse brakeTM-172
13. Forward one- way clutch (Parts behind drum support is
impossible to perform inspection by disassembly. Refer to
TM-8
, TM-9.TM-172
14. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to
TM-8
, TM-9. TM-172
35 With selector lever in
“D” position, accelera-
tion is extremely poor. ON vehicle
1. Fluid level and state
TM-148
2. Line pressure testTM-157
3. Accelerator pedal position sensor TM-71
4. CAN communication line LAN-4
5. Transmission range switchTM-45
6. Control cable adjustmentTM-164
7. Control valve with TCMTM-172
OFF vehicle8. Torque converter
TM-204
9. Oil pump assemblyTM-172
10. 1st one-way clutchTM-172
11. Gear systemTM-172
12. Reverse brakeTM-172
13. Forward one- way clutch (Parts behind drum support is
impossible to perform inspection by disassembly. Refer to
TM-8
, TM-9.TM-172
14. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to
TM-8
, TM-9. TM-172
No. Items
Symptom Condition Diagnostic ItemReference
page
Revision: April 20092010 QX56