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 

AT-53, "A/T Fluid Condi-

tion Check"

 .

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” 

→

 

“D” position)
Refer to 

AT-193, 

"Large Shock (“N” to 
“D” Position)"

 .

ON vehicle

1. Engine idle speed

EC-83

 (for 

VQ35DE 

engine), 

EC-785

  

(for 

VK45DE 

engine)

2. Engine speed signal

AT-124

3. Accelerator pedal position sensor

AT-132

4. A/T position

AT-227

5. A/T fluid temperature sensor

AT-135

6. ATF pressure switch 1 and front brake solenoid valve

AT-172

, 

AT-151

7. CAN communication line

AT-105

8. A/T fluid level and state

AT-53

9. Line pressure test

AT-55

10. Control valve with TCM

AT-236

OFF vehicle

11. Forward brake (Parts behind drum support is impossible 
to perform inspection by disassembly. Refer to 

AT-17, 

"Cross-Sectional View (VQ35DE Models for 2WD)"

 , 

AT-18, 

"Cross-Sectional View (VK45DE Models for 2WD)"

  or 

AT-19, 

"Cross-Sectional View (AWD Models)"

 .)

AT-301

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

AT-132

2. A/T position

AT-227

3. ATF pressure switch 5 and direct clutch solenoid valve

AT-176

, 

AT-155

4. CAN communication line

AT-105

5. Engine speed signal

AT-124

6. Turbine revolution sensor

AT-117

7. Vehicle speed sensor·A/T and vehicle speed sensor·MTR

AT-119

, 

AT-140

8. A/T fluid level and state

AT-53

9. Control valve with TCM

AT-236

OFF vehicle

10. Direct clutch

AT-341

3

Shock is too large 
when changing D

2

  

→

 

D

3

  or M

2

  

→

 M

3

 .

ON vehicle

1. Accelerator pedal position sensor

AT-132

2. A/T position

AT-227

3. ATF pressure switch 6, high and low reverse clutch sole-
noid valve

AT-178

, 

AT-159

4. CAN communication line

AT-105

5. Engine speed signal

AT-124

6. Turbine revolution sensor

AT-117

7. Vehicle speed sensor·A/T and vehicle speed sensor·MTR

AT-119

, 

AT-140

8. A/T fluid level and state

AT-53

9. Control valve with TCM

AT-236

OFF vehicle

10. High and low reverse clutch

AT-339

4

Shock is too large 
when changing D

3

  

→

 

D

4

  or M

3 

→

  M

4

 .

ON vehicle

1. Accelerator pedal position sensor

AT-132

2. A/T position

AT-227

3. ATF pressure switch 3 and input clutch solenoid valve

AT-174

, 

AT-147

4. CAN communication line

AT-105

5. Engine speed signal

AT-124

6. Turbine revolution sensor

AT-117

7. Vehicle speed sensor·A/T and vehicle speed sensor·MTR

AT-119

, 

AT-140

8. A/T fluid level and state

AT-53

9. Control valve with TCM

AT-236

OFF vehicle

10. Input clutch

AT-327

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

AT-132

2. A/T position

AT-227

3. ATF pressure switch 1 and front brake solenoid valve

AT-172

, 

AT-151

  

4. CAN communication line

AT-105

5. Engine speed signal

AT-124

6. Turbine revolution sensor

AT-117

7. Vehicle speed sensor·A/T and vehicle speed sensor·MTR

AT-119

, 

AT-140

8. A/T fluid level and state

AT-53

9. Control valve with TCM

AT-236

OFF vehicle

10. Front brake (brake band)

AT-301

11. Input clutch

AT-327

6

Shock is too large for 
downshift when accel-
erator pedal is 
pressed.

ON vehicle

1. Accelerator pedal position sensor

AT-132

2. A/T position

AT-227

3. CAN communication line

AT-105

4. Engine speed signal

AT-124

5. Turbine revolution sensor

AT-117

6. Vehicle speed sensor·A/T and vehicle speed sensor·MTR

AT-119

, 

AT-140

7. A/T fluid level and state

AT-53

8. Control valve with TCM

AT-236

OFF vehicle

9. Front brake (brake band)

AT-301

10. Input clutch 

AT-327

11. High and low reverse clutch

AT-339

12. Direct clutch

AT-341

7

Shock is too large for 
upshift when acceler-
ator pedal is released.

ON vehicle

1. Accelerator pedal position sensor

AT-132

2. A/T position

AT-227

3. Engine speed signal

AT-124

4. CAN communication line

AT-105

5. Turbine revolution sensor

AT-117

6. Vehicle speed sensor·A/T and vehicle speed sensor·MTR

AT-119

, 

AT-140

7. A/T fluid level and state

AT-53

8. Control valve with TCM

AT-236

OFF vehicle

9. Front brake (brake band)

AT-301

10. Input clutch 

AT-327

11. High and low reverse clutch 

AT-339

12. Direct clutch 

AT-341

No.

Item

Symptom

Condition

Diagnostic Item

Reference 

page