Infiniti M35/M45 Y50. Manual — part 36



TROUBLE DIAGNOSIS

AT-67

D

E

F

G

H

I

J

K

L

M

A

B

AT

8

Shift
Shock

Shock is too large for
lock-up.

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. Torque converter clutch solenoid valve

AT-126

8. A/T fluid level and state

AT-53

9. Control valve with TCM

AT-236

OFF vehicle

10. Torque converter

AT-301

9

Shock is too large
during engine brake.

ON vehicle

1. Accelerator pedal position sensor

AT-132

2. A/T position

AT-227

3. CAN communication line

AT-105

4. A/T fluid level and state

AT-53

5. Control valve with TCM

AT-236

OFF vehicle

6. Front brake (brake band)

AT-301

7. Input clutch

AT-327

8. High and low reverse clutch

AT-339

9. Direct clutch

AT-341

10

No Up
Shift

Gear does not change
from D

1

D

2

or from

M

1

M

2

.

Refer to

AT-201, "A/T

Does Not Shift: D

1

D

2

"

.

ON vehicle

1. A/T fluid level and state

AT-53

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

AT-119

,

AT-140

3. ATF pressure switch 5 and direct clutch solenoid valve

AT-176

,

AT-155

4. Line pressure test

AT-55

5. CAN communication line

AT-105

6. Control valve with TCM

AT-236

OFF vehicle

7. Direct clutch

AT-341

11

Gear does not change
from D

2

D

3

or from

M

2

M

3

.

Refer to

AT-203, "A/T

Does Not Shift: D

2

D

3

"

.

ON vehicle

1. A/T fluid level and state

AT-53

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

AT-119

,

AT-140

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

AT-178

,

AT-159

4. Line pressure test

AT-55

5. CAN communication line

AT-105

6. Control valve with TCM

AT-236

OFF vehicle

7. High and low reverse clutch

AT-339

No.

Item

Symptom

Condition

Diagnostic Item

Reference

page

AT-68

TROUBLE DIAGNOSIS

12

No Up
Shift

Gear does not change
from D

3

D

4

or from

M

3

M

4

.

Refer to

AT-205, "A/T

Does Not Shift: D

3

D

4

"

.

ON vehicle

1. A/T fluid level and state

AT-53

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

AT-119

,

AT-140

3. ATF pressure switch 3 and input clutch solenoid valve

AT-174

,

AT-147

4. ATF pressure switch 1 and front brake solenoid valve

AT-172

,

AT-151

5. Line pressure test

AT-55

6. CAN communication line

AT-105

7. Control valve with TCM

AT-236

OFF vehicle

8. Input clutch

AT-327

13

Gear does not change
from D

4

D

5

or from

M

4

M

5

.

Refer to

AT-207, "A/T

Does Not Shift: D

4

D

5

"

.

ON vehicle

1. A/T fluid level and state

AT-53

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

AT-119

,

AT-140

3. ATF pressure switch 1 and front brake solenoid valve

AT-172

,

AT-151

4. ATF pressure switch 5 and direct clutch solenoid valve

AT-176

,

AT-155

5. Turbine revolution sensor

AT-117

6. Line pressure test

AT-55

7. CAN communication line

AT-105

8. Control valve with TCM

AT-236

OFF vehicle

9. Front brake (brake band)

AT-301

10. Input clutch

AT-327

14

No Down
Shift

In “D” or “M” position,
does not downshift to
4th gear.

ON vehicle

1. A/T fluid level and state

AT-53

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

AT-119

,

AT-140

3. ATF pressure switch 1 and front brake solenoid valve

AT-172

,

AT-151

4. ATF pressure switch 5 and direct clutch solenoid valve

AT-176

,

AT-155

5. CAN communication line

AT-105

6. Line pressure test

AT-55

7. Control valve with TCM

AT-236

OFF vehicle

8. Front brake (brake band)

AT-301

9. Input clutch

AT-327

No.

Item

Symptom

Condition

Diagnostic Item

Reference

page

TROUBLE DIAGNOSIS

AT-69

D

E

F

G

H

I

J

K

L

M

A

B

AT

15

No Down
Shift

In “D” or “M” position,
does not downshift to
3rd gear.

ON vehicle

1. A/T fluid level and state

AT-53

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

AT-119

,

AT-140

3. ATF pressure switch 3 and input clutch solenoid valve

AT-174

,

AT-147

4. ATF pressure switch 1 and front brake solenoid valve

AT-172

,

AT-151

5. CAN communication line

AT-105

6. Line pressure test

AT-55

7. Control valve with TCM

AT-236

OFF vehicle

8. Input clutch

AT-327

16

In “D” or “M” position,
does not downshift to
2nd gear.

ON vehicle

1. A/T fluid level and state

AT-53

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

AT-119

,

AT-140

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

AT-178

,

AT-159

4. CAN communication line

AT-105

5. Line pressure test

AT-55

6. Control valve with TCM

AT-236

OFF vehicle

7. High and low reverse clutch

AT-339

17

In “D” or “M” position,
does not downshift to
1st gear.

ON vehicle

1. A/T fluid level and state

AT-53

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

AT-119

,

AT-140

3. ATF pressure switch 5 and direct clutch solenoid valve

AT-176

,

AT-155

4. CAN communication line

AT-105

5. Line pressure test

AT-55

6. Control valve with TCM

AT-236

OFF vehicle

7. Direct clutch

AT-341

No.

Item

Symptom

Condition

Diagnostic Item

Reference

page

AT-70

TROUBLE DIAGNOSIS

18

Slips/Will
Not
Engage

When “D” or “M” posi-
tion, remains in 1st
gear.

ON vehicle

1. A/T fluid level and state

AT-53

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

AT-119

,

AT-140

3. Direct clutch solenoid valve

AT-155

4. Line pressure test

AT-55

5. CAN communication line

AT-105

6. Control valve with TCM

AT-236

OFF vehicle

7. 3rd one-way clutch

AT-325

8. 1st one-way clutch

AT-333

9. Gear system

AT-281

10. Reverse brake

AT-301

11. Forward one-way clutch (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

12. 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

19

When “D” or “M” posi-
tion, remains in 2nd
gear.

ON vehicle

1. A/T fluid level and state

AT-53

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

AT-119

,

AT-140

3. Low coast brake solenoid valve

AT-163

4. Line pressure test

AT-55

5. CAN communication line

AT-105

6. Control valve with TCM

AT-236

OFF vehicle

7. 3rd one-way clutch

AT-325

8. Gear system

AT-281

9. Direct clutch

AT-341

10. 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

No.

Item

Symptom

Condition

Diagnostic Item

Reference

page

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Политика конфиденциальности