Infiniti FX35 / FX45. Manual — part 36
AT-72
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS
34
Slips/Will
Not En-
gage
When pressing the ac-
celerator pedal and
shifting speed D
2
→
D
1
or M2
→
M1 the
engine idles or the A/T
slips.
ON vehicle
1. A/T fluid level and state
2. Vehicle speed sensor A/T and vehicle speed sensor MTR
3. Direct clutch solenoid valve
4. CAN communication line
5. Line pressure test
6. Control valve with TCM
OFF vehicle
7. Torque converter
8. Oil pump assembly
9. 3rd one-way clutch
10. 1st one-way clutch
11. Gear system
12. Reverse brake
13. Forward one-way clutch (Parts behind drum support is im-
possible to perform inspection by disassembly. Refer to
16, "Cross-Sectional View (2WD Models)"
Sectional View (VQ35DE Models for AWD)"
Sectional View (VK45DE Models for AWD)"
)
14. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to
35
With selector lever in
“D” position, accelera-
tion is extremely poor.
ON vehicle
1. A/T fluid level and state
2. Line pressure test
3. Accelerator pedal position sensor
4. CAN communication line
5. PNP switch
6. A/T position
7. Control valve with TCM
OFF vehicle
8. Torque converter
9. Oil pump assembly
10. 1st one-way clutch
11. Gear system
12. Reverse brake
13. Forward one-way clutch (Parts behind drum support is im-
possible to perform inspection by disassembly. Refer to
16, "Cross-Sectional View (2WD Models)"
Sectional View (VQ35DE Models for AWD)"
Sectional View (VK45DE Models for AWD)"
)
14. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to
No.
Items
Symptom
Condition
Diagnostic Item
Reference
page
TROUBLE DIAGNOSIS
AT-73
< SERVICE INFORMATION >
D
E
F
G
H
I
J
K
L
M
A
B
AT
N
O
P
36
Slips/Will
Not En-
gage
With selector lever in
“R” position, accelera-
tion is extremely poor.
ON vehicle
1. A/T fluid level and state
2. Line pressure test
3. Accelerator pedal position sensor
4. High and low reverse clutch solenoid valve
5. CAN communication line
6. PNP switch
7. A/T position
8. Control valve with TCM
OFF vehicle
9. Gear system
10. Output shaft
11. Reverse brake
37
While starting off by
accelerating in 1st, en-
gine races or slippage
occurs.
ON vehicle
1. A/T fluid level and state
2. Line pressure test
3. Accelerator pedal position sensor
4. CAN communication line
5. Control valve with TCM
OFF vehicle
6. Torque converter
7. Oil pump assembly
8. 3rd one-way clutch
9. 1st one-way clutch
10. Gear system
11. Reverse brake
12. Forward one-way clutch (Parts behind drum support is im-
possible to perform inspection by disassembly. Refer to
16, "Cross-Sectional View (2WD Models)"
Sectional View (VQ35DE Models for AWD)"
Sectional View (VK45DE Models for AWD)"
13. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to
)
No.
Items
Symptom
Condition
Diagnostic Item
Reference
page
AT-74
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS
38
Slips/Will
Not En-
gage
While accelerating in
2nd, engine races or
slippage occurs.
ON vehicle
1. A/T fluid level and state
2. Line pressure test
3. Accelerator pedal position sensor
4. CAN communication line
5. Direct clutch solenoid valve
6. Control valve with TCM
OFF vehicle
7. Torque converter
8. Oil pump assembly
9. 3rd one-way clutch
10. Gear system
11. Direct clutch
12. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to
39
While accelerating in
3rd, engine races or
slippage occurs.
ON vehicle
1. A/T fluid level and state
2. Line pressure test
3. Accelerator pedal position sensor
4. CAN communication line
5. High and low reverse clutch solenoid valve
6. Control valve with TCM
OFF vehicle
7. Torque converter
8. Oil pump assembly
9. 3rd one-way clutch
10. Gear system
11. High and low reverse clutch
12. Forward one-way clutch (Parts behind drum support is im-
possible to perform inspection by disassembly. Refer to
16, "Cross-Sectional View (2WD Models)"
Sectional View (VQ35DE Models for AWD)"
Sectional View (VK45DE Models for AWD)"
)
13. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to
No.
Items
Symptom
Condition
Diagnostic Item
Reference
page
TROUBLE DIAGNOSIS
AT-75
< SERVICE INFORMATION >
D
E
F
G
H
I
J
K
L
M
A
B
AT
N
O
P
40
Slips/Will
Not En-
gage
While accelerating in
4th, engine races or
slippage occurs.
ON vehicle
1. A/T fluid level and state
2. Line pressure test
3. Accelerator pedal position sensor
4. CAN communication line
5. Input clutch solenoid valve
6. Control valve with TCM
OFF vehicle
7. Torque converter
8. Oil pump assembly
9. Input clutch
10. Gear system
11. High and low reverse clutch
12. Direct clutch
41
While accelerating in
5th, engine races or
slippage occurs.
ON vehicle
1. A/T fluid level and state
2. Line pressure test
3. Accelerator pedal position sensor
4. CAN communication line
5. Front brake solenoid valve
6. Control valve with TCM
OFF vehicle
7. Torque converter
8. Oil pump assembly
9. Front brake (brake band)
10. Input clutch
11. Gear system
12. High and low reverse clutch
42
Slips at lock-up.
ON vehicle
1. A/T fluid level and state
2. Line pressure test
3. Engine speed signal
4. Turbine revolution sensor
5. Torque converter clutch solenoid valve
6. CAN communication line
7. Control valve with TCM
OFF vehicle
8. Torque converter
9. Oil pump assembly
No.
Items
Symptom
Condition
Diagnostic Item
Reference
page
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