INFINITI QX56 2008 Factory Service Manual

TM-154
< SYMPTOM DIAGNOSIS >
SYSTEM SYMPTOM
7Shift
Shock Shock is too large for
upshift when accelera-
tor pedal is released.
ON vehicle1. Accelerator pedal position sensor
TM-69
2. Control cable adjustmentTM-194
3. Engine speed signal TM-51
4. CAN communication line LAN-4
5. Input speed sensorTM-46
6. Output speed sensor and vehicle speed sensor TM-48,
TM-74
7. Fluid level and state TM-178
8. Control valve with TCMTM-201
OFF vehicle9. Front brake (brake band)
TM-22010. Input clutchTM-254
11. High and low reverse clutchTM-264
12. Direct clutchTM-266
8Shock is too large for
lock-up. ON vehicle1. Accelerator pedal position sensor
TM-69
2. Control cable adjustmentTM-194
3. Engine speed signal TM-51
4. CAN communication line LAN-4
5. Input speed sensorTM-46
6. Output speed sensor and vehicle speed sensor TM-48,
TM-74
7. Torque converter clutch solenoid valve TM-63
8. Fluid level and stateTM-178
9. Control valve with TCMTM-201
OFF vehicle 10. Torque converter TM-232
9Shock is too large dur-
ing engine brake. ON vehicle
1. Accelerator pedal position sensor
TM-69
2. Control cable adjustmentTM-194
3. CAN communication line LAN-4
4. Fluid level and stateTM-178
5. Control valve with TCMTM-201
OFF vehicle6. Front brake (brake band)
TM-2207. Input clutchTM-254
8. High and low reverse clutchTM-264
9. Direct clutchTM-266
No. ItemsSymptom Condition Diagnostic ItemReference
page
Revision: March 2010 2008 QX56

SYSTEM SYMPTOMTM-155
< SYMPTOM DIAGNOSIS >
CEF
G H
I
J
K L
M A
B
TM
N
O P
10
No Up
Shift Gear does not change
from D → D
2.
Refer to TM-130, "
A/T
Does Not Shift:
D1→D2". ON vehicle1. Fluid level and state
TM-178
2. Output speed sensor and vehicle speed sensor TM-48,
TM-74
3. Direct clutch solenoid valve TM-84
4. Line pressure testTM-187
5. CAN communication line LAN-4
6. Control valve with TCMTM-201
OFF vehicle 7. Direct clutch TM-266
11Gear does not change
from D → D3.
Refer to TM-131, "
A/T
Does Not Shift:
D2→D3". ON vehicle1. Fluid level and state
TM-178
2. Output speed sensor and vehicle speed sensor TM-48,
TM-74
3. High and low reverse clutch solenoid valve TM-86
4. Line pressure testTM-187
5. CAN communication line LAN-4
6. Control valve with TCMTM-201
OFF vehicle 7. High and low reverse clutch TM-264
12Gear does not change
from D → D
4.
Refer to TM-133, "
A/T
Does Not Shift:
D3→D4". ON vehicle1. Fluid level and state
TM-178
2. Output speed sensor and vehicle speed sensor TM-48,
TM-74
3. Input clutch solenoid valve TM-80
4. Front brake solenoid valveTM-82
5. Line pressure testTM-187
6. CAN communication line LAN-4
7. Control valve with TCMTM-201
OFF vehicle 8. Input clutch TM-254
13Gear does not change
from D → D
5.
Refer to TM-135, "
A/T
Does Not Shift:
D4→D5". ON vehicle1. Fluid level and state
TM-178
2. Output speed sensor and vehicle speed sensor TM-48,
TM-74
3. Front brake solenoid valve TM-82
4. Direct clutch solenoid valveTM-84
5. Input speed sensorTM-46
6. Line pressure testTM-187
7. CAN communication line LAN-4
8. Control valve with TCMTM-201
OFF vehicle9. Front brake (brake band)
TM-22010. Input clutchTM-254
No. ItemsSymptom Condition Diagnostic ItemReference
page
Revision: March 2010 2008 QX56

TM-156
< SYMPTOM DIAGNOSIS >
SYSTEM SYMPTOM
14No Down
Shift In “D” or "4" range,
does not downshift to
4GR.
Refer to TM-142, "A/T
Does Not Shift: 5GR
→ 4GR".
ON vehicle1. Fluid level and state
TM-178
2. Output speed sensor and vehicle speed sensor TM-48,
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-187
7. Control valve with TCMTM-201
OFF vehicle8. Front brake (brake band)
TM-2209. Input clutchTM-254
15In “D” or "3" range,
does not downshift to
3GR.
Refer to TM-144, "A/T
Does Not Shift: 4GR
→ 3GR".ON vehicle1. Fluid level and state
TM-178
2. Output speed sensor and vehicle speed sensor TM-48,
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-187
7. Control valve with TCMTM-201
OFF vehicle 8. Input clutch TM-254
16In “D” or "2" range,
does not downshift to
2GR. Refer to
TM-146, "A/T Does Not
Shift: 3GR → 2GR".
. ON vehicle1. Fluid level and state
TM-178
2. Output speed sensor and vehicle speed sensor TM-48,
TM-74
3. High and low reverse clutch solenoid valve TM-86
4. CAN communication line LAN-4
5. Line pressure testTM-187
6. Control valve with TCMTM-201
OFF vehicle 7. High and low reverse clutch TM-264
17In “D” or "1" range,
does not downshift to
1GR.
Refer to TM-147, "A/T
Does Not Shift: 2GR
→ 1GR".ON vehicle1. Fluid level and state
TM-178
2. Output speed sensor and vehicle speed sensor TM-48,
TM-74
3. Direct clutch solenoid valve TM-84
4. CAN communication line LAN-4
5. Line pressure testTM-187
6. Control valve with TCMTM-201
OFF vehicle 7. Direct clutch TM-266
No. ItemsSymptom Condition Diagnostic ItemReference
page
Revision: March 2010 2008 QX56

SYSTEM SYMPTOMTM-157
< SYMPTOM DIAGNOSIS >
CEF
G H
I
J
K L
M A
B
TM
N
O P18
Slips/Will
Not en-
gage When “D” position, re-
mains in 1GR.
ON vehicle
1. Fluid level and state
TM-178
2. Output speed sensor and vehicle speed sensor TM-48,
TM-74
3. Direct clutch solenoid valve TM-84
4. Line pressure testTM-187
5. CAN communication line LAN-4
6. Control valve with TCMTM-201
OFF vehicle7. 3rd one-way clutch
TM-252
8. 1st one-way clutchTM-259
9. Gear systemTM-220
10. Reverse brakeTM-232
11. Forward one-way clutch (Parts behind drum support is im-
possible to perform inspection by disassembly. Refer to TM-
8, TM-9
TM-232
12. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to TM-8
, TM-9TM-232
19 When “D” position, re-
mains in 2GR. ON vehicle1. Fluid level and state
TM-178
2. Output speed sensor and vehicle speed sensor TM-48,
TM-74
3. Low coast brake solenoid valve TM-88
4. Line pressure testTM-187
5. CAN communication line LAN-4
6. Control valve with TCMTM-201
OFF vehicle7. 3rd one-way clutch
TM-252
8. Gear systemTM-220
9. Direct clutchTM-266
10. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to TM-8
, TM-9TM-232
No. Items Symptom Condition Diagnostic ItemReference
page
Revision: March 2010 2008 QX56

TM-158
< SYMPTOM DIAGNOSIS >
SYSTEM SYMPTOM
20Slips/Will
Not en-
gage When “D” position, re-
mains in 3GR.
ON vehicle
1. Fluid level and state
TM-178
2. Output speed sensor and vehicle speed sensor TM-48,
TM-74
3. Line pressure test TM-187
4. CAN communication line LAN-4
5. Control valve with TCMTM-201
OFF vehicle6. 3rd one-way clutch
TM-252
7. Gear systemTM-220
8. High and low reverse clutchTM-264
9. Forward one-way clutch (Parts behind drum support is im-
possible to perform inspection by disassembly. Refer to TM-
8, TM-9
TM-232
10. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to TM-8
, TM-9TM-232
21 When “D” position, re-
mains in 4GR. ON vehicle1. Fluid level and state
TM-178
2. Output speed sensor and vehicle speed sensor TM-48,
TM-74
3. Input clutch solenoid valve TM-80
4. Direct clutch solenoid valveTM-84
5. High and low reverse clutch solenoid valveTM-86
6. Low coast brake solenoid valveTM-88
7. Front brake solenoid valveTM-82
8. Line pressure testTM-187
9. CAN communication line LAN-4
10. Control valve with TCMTM-201
OFF vehicle11. Input clutch
TM-25412. Gear systemTM-220
13. High and low reverse clutchTM-264
14. Direct clutchTM-266
No. ItemsSymptom Condition Diagnostic ItemReference
page
Revision: March 2010 2008 QX56

SYSTEM SYMPTOMTM-159
< SYMPTOM DIAGNOSIS >
CEF
G H
I
J
K L
M A
B
TM
N
O P
22
Slips/Will
Not En-
gage When “D” position, re-
mains in 5GR.
ON vehicle1. Fluid level and state
TM-178
2. Output speed sensor and vehicle speed sensor TM-48,
TM-74
3. Front brake solenoid valve TM-82
4. Line pressure testTM-187
5. CAN communication line LAN-4
6. Control valve with TCMTM-201
OFF vehicle7. Front brake (brake band)
TM-2208. Input clutchTM-254
9. Gear systemTM-220
10. High and low reverse clutchTM-264
23Vehicle cannot be
started from D
1.
Refer to TM-128, "
Ve-
hicle Cannot Be Start-
ed from D1". ON vehicle
1. Fluid level and state
TM-178
2. Accelerator pedal position sensor TM-69
3. Line pressure testTM-187
4. CAN communication line LAN-4
5. Control valve with TCMTM-201
OFF vehicle6. Torque converter
TM-232
7. Oil pump assemblyTM-250
8. 3rd one-way clutchTM-252
9. 1st one-way clutchTM-259
10. Gear systemTM-220
11. Reverse brakeTM-232
12. Forward one-way clutch (Parts behind drum support is im-
possible to perform inspection by disassembly. Refer to TM-
8, TM-9
TM-232
13. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to TM-8
, TM-9TM-232
24 Does not lock-up.
Refer to
TM-137, "A/T
Does Not Perform
Lock-up"
ON vehicle 1. Fluid level and state
TM-178
2. Line pressure testTM-187
3. Engine speed signal TM-51
4. Input speed sensorTM-46
5. Torque converter clutch solenoid valveTM-63
6. CAN communication line LAN-4
7. Control valve with TCMTM-201
OFF vehicle8. Torque converter
TM-2329. Oil pump assemblyTM-250
No. ItemsSymptom Condition Diagnostic ItemReference
page
Revision: March 2010 2008 QX56

TM-160
< SYMPTOM DIAGNOSIS >
SYSTEM SYMPTOM
25Slips/Will
Not en-
gage Does not hold lock-up
condition.
Refer to TM-139, "A/T
Does Not Hold Lock-
up Condition".
ON vehicle 1. Fluid level and state
TM-178
2. Line pressure testTM-187
3. Engine speed signal TM-51
4. Input speed sensorTM-46
5. Torque converter clutch solenoid valveTM-63
6. CAN communication line LAN-4
7. Control valve with TCMTM-201
OFF vehicle8. Torque converter
TM-2329. Oil pump assemblyTM-250
26Lock-up is not re-
leased.
Refer to TM-140,
"Lock-up Is Not Re-
leased".ON vehicle1. Fluid level and state
TM-178
2. Line pressure testTM-187
3. Engine speed signal TM-51
4. Input speed sensorTM-46
5. Torque converter clutch solenoid valveTM-63
6. CAN communication line LAN-4
7. Control valve with TCMTM-201
OFF vehicle8. Torque converter
TM-2329. Oil pump assemblyTM-250
27No shock at all or the
clutch slips when vehi-
cle changes speed D1
→ D2. ON vehicle
1. Fluid level and state
TM-178
2. Output speed sensor and vehicle speed sensor TM-48,
TM-74
3. Direct clutch solenoid valve TM-84
4. CAN communication line LAN-4
5. Line pressure testTM-187
6. Control valve with TCMTM-201
OFF vehicle7. Torque converter
TM-232
8. Oil pump assemblyTM-250
9. 3rd one-way clutchTM-252
10. Gear systemTM-220
11. Direct clutchTM-266
12. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to TM-8
, TM-9TM-232
No. Items Symptom Condition Diagnostic ItemReference
page
Revision: March 2010 2008 QX56

SYSTEM SYMPTOMTM-161
< SYMPTOM DIAGNOSIS >
CEF
G H
I
J
K L
M A
B
TM
N
O P
28
Slips/Will
Not en-
gage No shock at all or the
clutch slips when vehi-
cle changes speed D2
→
D3. ON vehicle
1. Fluid level and state
TM-178
2. Output speed sensor and vehicle speed sensor TM-48,
TM-74
3. High and low reverse clutch solenoid valve TM-86
4. CAN communication line LAN-4
5. Line pressure testTM-187
6. Control valve with TCMTM-201
OFF vehicle7. Torque converter
TM-232
8. Oil pump assemblyTM-250
9. 3rd one-way clutchTM-252
10. Gear systemTM-220
11. High and low reverse clutchTM-264
12. Forward one- way clutch (Parts behind drum support is
impossible to perform inspection by disassembly. Refer to
TM-8
, TM-9
TM-232
13. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to TM-8
, TM-9TM-232
29 No shock at all or the
clutch slips when vehi-
cle changes speed D3
→
D4. ON vehicle
1. Fluid level and state
TM-178
2. Output speed sensor and vehicle speed sensor TM-48,
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-187
7. Control valve with TCMTM-201
OFF vehicle8. Torque converter
TM-232
9. Oil pump assemblyTM-250
10. Input clutchTM-254
11. Gear systemTM-220
12. High and low reverse clutchTM-264
13. Direct clutchTM-266
No. ItemsSymptom Condition Diagnostic ItemReference
page
Revision: March 2010 2008 QX56

TM-162
< SYMPTOM DIAGNOSIS >
SYSTEM SYMPTOM
30Slips/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-178
2. Output speed sensor and vehicle speed sensor TM-48,
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-187
7. Control valve with TCMTM-201
OFF vehicle8. Torque converter
TM-232
9. Oil pump assemblyTM-250
10. Front brake (brake band)TM-220
11. Input clutchTM-254
12. Gear systemTM-220
13. High and low reverse clutchTM-264
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-178
2. Output speed sensor and vehicle speed sensor TM-48,
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-187
7. Control valve with TCMTM-201
OFF vehicle8. Torque converter
TM-232
9. Oil pump assemblyTM-250
10. Input clutchTM-254
11. Gear systemTM-220
12. High and low reverse clutchTM-264
13. Direct clutchTM-266
No. ItemsSymptom Condition Diagnostic ItemReference
page
Revision: March 2010 2008 QX56

SYSTEM SYMPTOMTM-163
< SYMPTOM DIAGNOSIS >
CEF
G H
I
J
K L
M A
B
TM
N
O P
32
Slips/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-178
2. Output speed sensor and vehicle speed sensor TM-48,
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-187
7. Control valve with TCMTM-201
OFF vehicle8. Torque converter
TM-232
9. Oil pump assemblyTM-250
10. 3rd one-way clutchTM-252
11. Gear systemTM-220
12. High and low reverse clutchTM-264
13. Forward one- way clutch (Parts behind drum support is
impossible to perform inspection by disassembly. Refer to
TM-8
, TM-9
TM-232
14. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to TM-8
, TM-9TM-232
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-178
2. Output speed sensor and vehicle speed sensor TM-48,
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-187
7. Control valve with TCMTM-201
OFF vehicle8. Torque converter
TM-232
9. Oil pump assemblyTM-250
10. 3rd one-way clutchTM-252
11. Gear systemTM-220
12. Direct clutchTM-266
13. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to TM-8
, TM-9TM-232
No. Items Symptom Condition Diagnostic ItemReference
page
Revision: March 2010 2008 QX56