Infiniti FX35 / FX45. Manual — part 32
AT-56
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS
When releasing accelerator pedal from D
5
, check lock-up from D
5
to L/U. Refer to
Which Lock-up Occurs/Releases"
With CONSULT-III
Select “TCC SOLENOID” with the “DATA MONITOR” mode for “TRANSMISSION”. Refer to
SULT-III Function (TRANSMISSION)"
.
Does it lock-up?
YES
>> GO TO 7.
NO
AT-190, "A/T Does Not Lock-up"
on the “Diagnostic Worksheet Chart”, then
continue the road test.
7.
CHECK LOCK-UP HOLD
Check hold lock-up.
With CONSULT-III
Select “TCC SOLENOID” with the “DATA MONITOR” mode for “TRANSMISSION”. Refer to
SULT-III Function (TRANSMISSION)"
.
Does it maintain lock-up status?
YES
>> GO TO 8.
NO
>> Enter a check mark at
AT-192, "A/T Does Not Hold Lock-up Condition"
on the “Diagnostic Work-
sheet Chart”, then continue the road test.
8.
CHECK LOCK-UP RELEASE
Check lock-up cancellation by depressing brake pedal lightly to decelerate.
With CONSULT-III
Select “TCC SOLENOID” with the “DATA MONITOR” mode for “TRANSMISSION”. Refer to
SULT-III Function (TRANSMISSION)"
.
Does lock-up cancel?
YES
>> GO TO 9.
NO
>> Enter a check mark at
AT-194, "Lock-up Is Not Released"
on the “Diagnostic Worksheet Chart”,
then continue the road test.
9.
CHECK SHIFT-DOWN D
5
→
D
4
Decelerate by pressing lightly on the brake pedal.
With CONSULT-III
Read the gear position and engine speed. Refer to
AT-84, "CONSULT-III Function (TRANSMISSION)"
.
When the A/T shift-down D
5
→
D
4
, does the engine speed drop smoothly back to idle?
YES
>> 1.
Stop the vehicle.
2.
Go to
.
NO
>> Enter a check mark at
AT-194, "Engine Speed Does Not Return to Idle"
on the “Diagnostic Work-
sheet Chart”, then continue the road test. Go to
.
CRUISE TEST - PART 2
1.
CHECK STARTING FROM D
1
1.
Move selector lever into “D” position.
2.
Accelerate at half throttle.
With CONSULT-III
Read the gear position. Refer to
AT-84, "CONSULT-III Function (TRANSMISSION)"
.
Does it start from D
1
?
YES
>> GO TO 2.
NO
AT-180, "Vehicle Cannot Be Started from D
on the “Diagnostic Worksheet
Chart”, then continue the road test.
2.
CHECK SHIFT-UP D
1
→
D
2
Press the accelerator pedal down all the way and check whether or not the A/T shifts up (D
1
→
D
2
) at the cor-
rect speed. Refer to
AT-58, "Vehicle Speed at Which Gear Shifting Occurs"
.
With CONSULT-III
TROUBLE DIAGNOSIS
AT-57
< SERVICE INFORMATION >
D
E
F
G
H
I
J
K
L
M
A
B
AT
N
O
P
Read the gear position, throttle position and vehicle speed. Refer to
AT-84, "CONSULT-III Function (TRANS-
.
Does the A/T shift-up D
1
→
D
2
at the correct speed?
YES
>> GO TO 3.
NO
>> Enter a check mark at
AT-182, "A/T Does Not Shift: D
on the “Diagnostic Worksheet
Chart”, then continue the road test.
3.
CHECK SHIFT-UP D
2
→
D
3
Press the accelerator pedal down all the way and check whether or not the A/T shifts up (D
2
→
D
3
) at the cor-
rect speed. Refer to
AT-58, "Vehicle Speed at Which Gear Shifting Occurs"
With CONSULT-III
Read the gear position, throttle position and vehicle speed. Refer to
AT-84, "CONSULT-III Function (TRANS-
.
Does the A/T shift-up D
2
→
D
3
at the correct speed?
YES
>> GO TO 4.
NO
>> Enter a check mark at
AT-184, "A/T Does Not Shift: D
on the “Diagnostic Worksheet
Chart”, then continue the road test.
4.
CHECK SHIFT-UP D
3
→
D
4
AND ENGINE BRAKE
When the A/T changes speed D
3
→
D
4
, return the accelerator pedal.
With CONSULT-III
Read the gear position. Refer to
AT-84, "CONSULT-III Function (TRANSMISSION)"
Does the A/T shift-up D
3
→
D
4
and apply the engine brake?
YES
>> 1.
Stop the vehicle.
2.
Go to
.
NO
>> Enter a check mark at
AT-186, "A/T Does Not Shift: D
on the “Diagnostic Worksheet
Chart”, then continue the road test. Go to
.
CRUISE TEST - PART 3
1.
MANUAL MODE FUNCTION
Move to manual mode from “D” position.
Does it switch to manual mode?
YES
>> GO TO 2.
NO
>> Continue road test and add check mark to
AT-195, "Cannot Be Changed to Manual Mode"
on the
“Diagnostic Worksheet Chart”.
2.
CHECK SHIFT-DOWN
During manual mode driving, is downshift from M5
→
M4
→
M3
→
M2
→
M1 performed?
With CONSULT-III
Read the gear position. Refer to
AT-84, "CONSULT-III Function (TRANSMISSION)"
Is downshifting correctly performed?
YES
>> GO TO 3.
NO
>> Enter a check mark at “Vehicle Does Not Shift” at the corresponding position (5th
→
4th, 4th
→
3rd, 3rd
→
2nd, 2nd
→
1st) on the “Diagnostic Worksheet Chart”, then continue the road test.
3.
CHECK ENGINE BRAKE
Check engine brake.
Does engine braking effectively reduce speed in M1 position?
YES - 1>>
With CONSULT-III
1.
Stop the vehicle.
2.
Perform self-diagnostics.
YES - 2>>
Without CONSULT-III
1.
Stop the vehicle.
2.
Perform self-diagnostics. Refer to
AT-91, "Diagnosis Procedure without CONSULT-III"
NO
>> Enter a check mark at
AT-202, "Vehicle Does Not Decelerate by Engine Brake"
on the “Diagnostic
Worksheet Chart”, then continue trouble diagnosis.
AT-58
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS
Vehicle Speed at Which Gear Shifting Occurs
INFOID:0000000001327159
2WD MODELS
• At half throttle, the accelerator opening is 4/8 of the full opening.
AWD MODELS
• At half throttle, the accelerator opening is 4/8 of the full opening.
• At half throttle, the accelerator opening is 4/8 of the full opening.
Vehicle Speed at Which Lock-up Occurs/Releases
INFOID:0000000001327160
2WD MODELS
• At closed throttle, the accelerator opening is less than 1/8 condition. (Closed throttle position signal: OFF)
• At half throttle, the accelerator opening is 4/8 of the full opening.
AWD MODELS
Engine model
VQ35DE
Throttle position
Vehicle speed
km/h (MPH)
D
1
→
D
2
D
2
→
D
3
D
3
→
D
4
D
4
→
D
5
D
5
→
D
4
D
4
→
D
3
D
3
→
D
2
D
2
→
D
1
Full throttle
68 - 72
(42 - 45)
106 - 114
(66 - 71)
164 - 174
(102 - 108)
235 - 245
(146 - 152)
231 - 241
(144 - 150)
144 - 154
(89 - 96)
89 - 97
(55 - 60)
43 - 47
(27 - 29)
Half throttle
54 - 58
(34 - 36)
84 - 90
(52 - 56)
127 - 135
(79 - 84)
159 - 167
(99 - 104)
104 - 112
(65 - 70)
75 - 83
(47 - 52)
35 - 41
(22 - 25)
11 - 15
(7 - 9)
Engine model
VQ35DE
Throttle position
Vehicle speed
km/h (MPH)
D
1
→
D
2
D
2
→
D
3
D
3
→
D
4
D
4
→
D
5
D
5
→
D
4
D
4
→
D
3
D
3
→
D
2
D
2
→
D
1
Full throttle
62 - 66
(39 - 41)
96 - 104
(60 - 65)
149 - 159
(93 - 99)
213 - 223
(132 - 139)
209 - 219
(130 - 136)
131 - 141
(81 - 88)
81 - 89
(50 - 55)
39 - 43
(24 - 27)
Half throttle
49 - 53
(30 - 33)
76 - 82
(47 - 51)
115 - 123
(71 - 76)
144 - 152
(89 - 94)
95 - 103
(59 - 64)
67 - 75
(42 - 47)
32 - 38
(20 - 24)
11 - 15
(7 - 9)
Engine model
VK45DE
Throttle position
Vehicle speed
km/h (MPH)
D
1
→
D
2
D
2
→
D
3
D
3
→
D
4
D
4
→
D
5
D
5
→
D
4
D
4
→
D
3
D
3
→
D
2
D
2
→
D
1
Full throttle
59 - 63
(37 - 39)
95 - 103
(59 - 64)
147 - 157
(92 - 98)
219 - 229
(137 - 143)
215 - 225
(134 - 141)
130 - 140
(81 - 88)
82 - 90
(51 - 56)
35 - 39
(22 - 24)
Half throttle
48 - 52
(30 - 33)
78 - 84
(48 - 52)
122 - 130
(76 - 81)
154 - 162
(96 - 101)
122 - 130
(76 - 81)
68 - 76
(42 - 47)
40 - 46
(25 - 29)
9 - 13
(6 - 8)
Engine model
VQ35DE
Throttle position
Vehicle speed
km/h (MPH)
Lock-up ON
Lock-up OFF
Closed throttle
65 - 73 (40 - 45)
62 - 70 (39 - 43)
Half throttle
196 - 204 (122 - 127)
153 - 161 (95 - 100)
Engine model
VQ35DE
Throttle position
Vehicle speed
km/h (MPH)
Lock-up ON
Lock-up OFF
Closed throttle
59 - 67 (37 - 42)
56 - 64 (35 - 40)
Half throttle
178 - 186 (111 - 116)
139 - 147 (86 - 91)
TROUBLE DIAGNOSIS
AT-59
< SERVICE INFORMATION >
D
E
F
G
H
I
J
K
L
M
A
B
AT
N
O
P
• At closed throttle, the accelerator opening is less than 1/8 condition. (Closed throttle position signal: OFF)
• At half throttle, the accelerator opening is 4/8 of the full opening.
• At closed throttle, the accelerator opening is less than 1/8 condition. (Closed throttle position signal: OFF)
• At half throttle, the accelerator opening is 4/8 of the full opening.
Symptom Chart
INFOID:0000000001327161
• The diagnostics item numbers show the sequence for inspection. Check in order from item 1.
• Overhaul and check inside the A/T only if A/T fluid condition is NG. Refer to
AT-49, "Inspections Before Trou-
Engine model
VK45DE
Throttle position
Vehicle speed
km/h (MPH)
Lock-up ON
Lock-up OFF
Closed throttle
66 - 74 (41 - 46)
53 - 61 (33 - 38)
Half throttle
191 - 199 (119 - 124)
145 - 153 (90 - 95)
No.
Items
Symptom
Condition
Diagnostic Item
Reference
page
1
Shift
Shock
Large shock. (“N”
→
“D” position)
Refer to
"Large Shock ("N" to
"D" Position)"
.
ON vehicle
1. Engine idle speed
(for
VQ35DE)
(for
VK45DE)
2. Engine speed signal
3. Accelerator pedal position sensor
4. A/T position
5. A/T fluid temperature sensor
6. Front brake solenoid valve
7. CAN communication line
8. A/T fluid level and state
9. Line pressure test
10. Control valve with TCM
OFF vehicle
11. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to
)
2
Shock is too large
when changing D
1
→
D
2
or M1
→
M2.
ON vehicle
1. Accelerator pedal position sensor
2. A/T position
3. Direct clutch solenoid valve
4. CAN communication line
5. Engine speed signal
6. Turbine revolution sensor
7. Vehicle speed sensor A/T and vehicle speed sensor MTR
8. A/T fluid level and state
9. Control valve with TCM
OFF vehicle
10. Direct clutch
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