Infiniti M35/M45 Y50. Manual — part 39



TROUBLE DIAGNOSIS

AT-79

D

E

F

G

H

I

J

K

L

M

A

B

AT

38

Slips/Will
Not
Engage

While accelerating in
2nd, engine races or
slippage occurs.

ON vehicle

1. A/T fluid level and state

AT-53

2. Line pressure test

AT-55

3. Accelerator pedal position sensor

AT-132

4. CAN communication line

AT-105

5. ATF pressure switch 5 and direct clutch solenoid valve

AT-176

,

AT-155

6. Control valve with TCM

AT-236

OFF vehicle

7. Torque converter

AT-301

8. Oil pump assembly

AT-322

9. 3rd one-way clutch

AT-325

10. Gear system

AT-281

11. Direct clutch

AT-341

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

39

While accelerating in
3rd, engine races or
slippage occurs.

ON vehicle

1. A/T fluid level and state

AT-53

2. Line pressure test

AT-55

3. Accelerator pedal position sensor

AT-132

4. CAN communication line

AT-105

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

AT-178

,

AT-159

6. Control valve with TCM

AT-236

OFF vehicle

7. Torque converter

AT-301

8. Oil pump assembly

AT-322

9. 3rd one-way clutch

AT-325

10. Gear system

AT-281

11. High and low reverse clutch

AT-339

12. 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

13. 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

AT-80

TROUBLE DIAGNOSIS

40

Slips/Will
Not
Engage

While accelerating in
4th, engine races or
slippage occurs.

ON vehicle

1. A/T fluid level and state

AT-53

2. Line pressure test

AT-55

3. Accelerator pedal position sensor

AT-132

4. CAN communication line

AT-105

5. ATF pressure switch 3 and input clutch solenoid valve

AT-174

,

AT-147

6. Control valve with TCM

AT-236

OFF vehicle

7. Torque converter

AT-301

8. Oil pump assembly

AT-322

9. Input clutch

AT-327

10. Gear system

AT-281

11. High and low reverse clutch

AT-339

12. Direct clutch

AT-341

41

While accelerating in
5th, engine races or
slippage occurs.

ON vehicle

1. A/T fluid level and state

AT-53

2. Line pressure test

AT-55

3. Accelerator pedal position sensor

AT-132

4. CAN communication line

AT-105

5. ATF pressure switch 1 and front brake solenoid valve

AT-172

,

AT-151

6. Control valve with TCM

AT-236

OFF vehicle

7. Torque converter

AT-301

8. Oil pump assembly

AT-322

9. Front brake (brake band)

AT-301

10. Input clutch

AT-327

11. Gear system

AT-281

12. High and low reverse clutch

AT-339

42

Slips at lock-up.

ON vehicle

1. A/T fluid level and state

AT-53

2. Line pressure test

AT-55

3. Engine speed signal

AT-124

4. Turbine revolution sensor

AT-117

5. Torque converter clutch solenoid valve

AT-126

6. CAN communication line

AT-105

7. Control valve with TCM

AT-236

OFF vehicle

8. Torque converter

AT-301

9. Oil pump assembly

AT-322

No.

Item

Symptom

Condition

Diagnostic Item

Reference

page

TROUBLE DIAGNOSIS

AT-81

D

E

F

G

H

I

J

K

L

M

A

B

AT

43

Slips/Will
Not
Engage

No creep at all.
Refer to

AT-195,

"Vehicle Does Not
Creep Backward in
“R” Position"

,

AT-197,

"Vehicle Does Not
Creep Forward in “D”
Position"

.

ON vehicle

1. A/T fluid level and state

AT-53

2. Line pressure test

AT-55

3. Accelerator pedal position sensor

AT-132

4. ATF pressure switch 5 and direct clutch solenoid valve

AT-176

,

AT-155

5. PNP switch

AT-113

6. CAN communication line

AT-105

7. A/T position

AT-227

8. Control valve with TCM

AT-236

OFF vehicle

9. Torque converter

AT-301

10. Oil pump assembly

AT-322

11. 1st one-way clutch

AT-333

12. Gear system

AT-281

13. Reverse brake

AT-301

14. Direct clutch

AT-341

15. 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

16. 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

44

Vehicle cannot run in
all positions.

ON vehicle

1. A/T fluid level and state

AT-53

2. Line pressure test

AT-55

3. PNP switch

AT-113

4. A/T position

AT-227

5. Control valve with TCM

AT-236

OFF vehicle

6. Oil pump assembly

AT-322

7. Gear system

AT-281

8. Output shaft

AT-301

No.

Item

Symptom

Condition

Diagnostic Item

Reference

page

AT-82

TROUBLE DIAGNOSIS

45

Slips/Will
Not
Engage

With selector lever in
“D” position, driving is
not possible.

ON vehicle

1. A/T fluid level and state

AT-53

2. Line pressure test

AT-55

3. PNP switch

AT-113

4. A/T position

AT-227

5. Control valve with TCM

AT-236

OFF vehicle

6. Torque converter

AT-301

7. Oil pump assembly

AT-322

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

46

With selector lever in
“R” position, driving is
not possible.

ON vehicle

1. A/T fluid level and state

AT-53

2. Line pressure test

AT-55

3. PNP switch

AT-113

4. A/T position

AT-227

5. Control valve with TCM

AT-236

OFF vehicle

6. Gear system

AT-281

7. Output shaft

AT-301

8. Reverse brake

AT-301

47

Does Not
Change

Does not change M5

M4.

Refer to

AT-214, "A/T

Does Not Shift: 5th
Gear

4th Gear"

.

ON vehicle

1. PNP switch

AT-113

2. A/T fluid level and state

AT-53

3. A/T position

AT-227

4. Manual mode switch

AT-167

5. ATF pressure switch 1

AT-172

6. CAN communication line

AT-105

7. Control valve with TCM

AT-236

OFF vehicle

8. Front brake (brake band)

AT-301

No.

Item

Symptom

Condition

Diagnostic Item

Reference

page

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Политика конфиденциальности