Infiniti M35/M45 Y50. Manual — part 35
TROUBLE DIAGNOSIS
AT-63
D
E
F
G
H
I
J
K
L
M
A
B
AT
Vehicle Speed at Which Gear Shifting Occurs
NCS001KD
2WD 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.
AWD MODELS
●
At half throttle, the accelerator opening is 4/8 of the full opening.
Vehicle Speed at Which Lock-Up Occurs/Releases
NCS001KE
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.
●
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.
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
52 - 56
(32 - 35)
85 - 93
(53 - 58)
126 - 136
(78 - 85)
195 - 205
(121 - 127)
191 - 201
(119 - 125)
113- 123
(70 - 76)
70 - 78
(44 - 48)
28 - 32
(17 - 20)
Half throttle
42 - 46
(26 - 29)
70 - 76
(44 - 47)
107 - 115
(67 - 71)
140 - 148
(87 - 92)
111 - 119
(69 - 74)
67 - 75
(42 - 47)
35 - 41
(22 - 25)
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
56 - 60
(35 - 37)
89 - 97
(55 - 60)
121 - 131
(75 - 81)
206 - 216
(128 - 134)
202 - 212
(126 - 132)
121 - 131
(75 - 81)
73 - 81
(45 - 50)
30 - 34
(19 - 21)
Half throttle
48 - 52
(30 - 32)
82 - 88
(51 - 55)
126 - 134
(78 - 83)
155 - 163
(96 - 101)
128 - 136
(80 - 85)
70 - 78
(43 - 48)
29 - 35
(18 - 22)
9 - 13
(6 - 8)
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
50 - 54
(31 - 34)
81 - 89
(50 - 55)
120 - 130
(75 - 81)
187 - 197
(116 - 122)
183 - 193
(114 - 120)
108 - 118
(67 - 73)
66 - 74
(41 - 46)
27 - 31
(17 - 19)
Half throttle
40 - 44
(25 - 27)
67 - 73
(42 - 45)
102 - 110
(63 - 68)
133 - 141
(83 - 88)
106 - 114
(66 - 71)
64 - 72
(40 - 45)
33 - 39
(21 - 24)
11 - 15
(7 - 9)
Engine model
VQ35DE
Throttle position
Vehicle speed km/h (MPH)
Lock-up ON
Lock-up OFF
Closed throttle
53 - 61 (33 - 38)
50 - 58 (31 - 36)
Half throttle
196 - 204 (122 - 127)
138 - 146 (86 - 91)
Engine model
VK45DE
Throttle position
Vehicle speed km/h (MPH)
Lock-up ON
Lock-up OFF
Closed throttle
67 - 75 (42 - 47)
50 - 58 (31 - 36)
Half throttle
181 - 189 (112 - 117)
160 - 168 (99 - 104)
AT-64
TROUBLE DIAGNOSIS
AWD 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.
Symptom Chart
NCS001KF
●
The diagnostics item numbers show the sequence for inspection. Inspect in order from item 1.
●
Overhaul and inspection inside the A/T only if A/T fluid condition is NG. Refer to
Engine model
VQ35DE
Throttle position
Vehicle speed km/h (MPH)
Lock-up ON
Lock-up OFF
Closed throttle
51 - 59 (32 - 37)
48 - 56 (30 - 35)
Half throttle
188 - 196 (117 - 122)
132 - 140 (82 - 87)
No.
Item
Symptom
Condition
Diagnostic Item
Reference
page
1
Shift
Shock
Large shock. (“N”
→
"Large Shock (“N” to
“D” Position)"
.
ON vehicle
1. Engine idle speed
(for
VQ35DE
engine),
(for
VK45DE
engine)
2. Engine speed signal
3. Accelerator pedal position sensor
4. A/T position
5. A/T fluid temperature sensor
6. ATF pressure switch 1 and 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
"Cross-Sectional View (VQ35DE Models for 2WD)"
"Cross-Sectional View (VK45DE Models for 2WD)"
or
TROUBLE DIAGNOSIS
AT-65
D
E
F
G
H
I
J
K
L
M
A
B
AT
2
Shift
Shock
Shock is too large
when changing D
1
→
D
2
or M
1
→
M
2
.
ON vehicle
1. Accelerator pedal position sensor
2. A/T position
3. ATF pressure switch 5 and 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
3
Shock is too large
when changing D
2
→
D
3
or M
2
→
M
3
.
ON vehicle
1. Accelerator pedal position sensor
2. A/T position
3. ATF pressure switch 6, high and low reverse clutch sole-
noid 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. High and low reverse clutch
4
Shock is too large
when changing D
3
→
D
4
or M
3
→
M
4
.
ON vehicle
1. Accelerator pedal position sensor
2. A/T position
3. ATF pressure switch 3 and input 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. Input clutch
No.
Item
Symptom
Condition
Diagnostic Item
Reference
page
AT-66
TROUBLE DIAGNOSIS
5
Shift
Shock
Shock is too large
when changing D
4
→
D
5
or M
4
→
M
5
.
ON vehicle
1. Accelerator pedal position sensor
2. A/T position
3. ATF pressure switch 1 and front brake 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. Front brake (brake band)
11. Input clutch
6
Shock is too large for
downshift when accel-
erator pedal is
pressed.
ON vehicle
1. Accelerator pedal position sensor
2. A/T position
3. CAN communication line
4. Engine speed signal
5. Turbine revolution sensor
6. Vehicle speed sensor·A/T and vehicle speed sensor·MTR
7. A/T fluid level and state
8. Control valve with TCM
OFF vehicle
9. Front brake (brake band)
10. Input clutch
11. High and low reverse clutch
12. Direct clutch
7
Shock is too large for
upshift when acceler-
ator pedal is released.
ON vehicle
1. Accelerator pedal position sensor
2. A/T position
3. Engine speed signal
4. CAN communication line
5. Turbine revolution sensor
6. Vehicle speed sensor·A/T and vehicle speed sensor·MTR
7. A/T fluid level and state
8. Control valve with TCM
OFF vehicle
9. Front brake (brake band)
10. Input clutch
11. High and low reverse clutch
12. Direct clutch
No.
Item
Symptom
Condition
Diagnostic Item
Reference
page
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