Infiniti M35/M45 Y50. Manual - part 39

2. Line pressure test

3. Accelerator pedal position sensor

4. CAN communication line

5. ATF pressure switch 5 and direct clutch solenoid valve

AT-176

AT-155

6. Control valve with TCM

OFF vehicle

7. Torque converter

8. Oil pump assembly

9. 3rd one-way clutch

AT-325

10. Gear system

11. Direct clutch

AT-341

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

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

ON vehicle

1. A/T fluid level and state

2. Line pressure test

3. Accelerator pedal position sensor

4. CAN communication line

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

AT-178

AT-159

6. Control valve with TCM

OFF vehicle

7. Torque converter

8. Oil pump assembly

9. 3rd one-way clutch

AT-325

10. Gear system

AT-17, "Cross-Sectional View (VQ35DE Models for 2WD)"

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-18, "Cross-Sectional View (VK45DE Models for 2WD)"

AT-19, "Cross-Sectional View (AWD Models)"

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

No.

Item

Symptom

Condition

Diagnostic Item

Reference

page

AT-80

TROUBLE DIAGNOSIS

Slips/Will
Not
Engage

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

ON vehicle

1. A/T fluid level and state

2. Line pressure test

3. Accelerator pedal position sensor

4. CAN communication line

5. ATF pressure switch 3 and input clutch solenoid valve

AT-174

AT-147

6. Control valve with TCM

OFF vehicle

7. Torque converter

8. Oil pump assembly

9. Input clutch

10. Gear system

11. High and low reverse clutch

AT-339

12. Direct clutch

AT-341

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

ON vehicle

1. A/T fluid level and state

2. Line pressure test

3. Accelerator pedal position sensor

4. CAN communication line

5. ATF pressure switch 1 and front brake solenoid valve

AT-172

AT-151

6. Control valve with TCM

OFF vehicle

7. Torque converter

8. Oil pump assembly

9. Front brake (brake band)

10. Input clutch

AT-327

11. Gear system

12. High and low reverse clutch

AT-339

Slips at lock-up.

ON vehicle

1. A/T fluid level and state

2. Line pressure test

3. Engine speed signal

AT-124

4. Turbine revolution sensor

AT-117

5. Torque converter clutch solenoid valve

AT-126

6. CAN communication line

7. Control valve with TCM

OFF vehicle

8. Torque converter

9. Oil pump assembly

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

No.

Item

Symptom

Condition

Diagnostic Item

Reference

page

TROUBLE DIAGNOSIS

AT-81

Slips/Will
Not
Engage

No creep at all.
Refer to

AT-195,

AT-197,

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

ON vehicle

1. A/T fluid level and state

2. Line pressure test

3. Accelerator pedal position sensor

4. ATF pressure switch 5 and direct clutch solenoid valve

AT-176

AT-155

5. PNP switch

6. CAN communication line

7. A/T position

8. Control valve with TCM

OFF vehicle

9. Torque converter

10. Oil pump assembly

AT-17, "Cross-Sectional View (VQ35DE Models for 2WD)"

11. 1st one-way clutch

12. Gear system

13. Reverse brake

14. Direct clutch

15. Forward one-way clutch (Parts behind drum support is
impossible to perform inspection by disassembly. Refer to

AT-18, "Cross-Sectional View (VK45DE Models for 2WD)"

AT-19, "Cross-Sectional View (AWD Models)"

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

Vehicle cannot run in
all positions.

ON vehicle

1. A/T fluid level and state

2. Line pressure test

3. PNP switch

4. A/T position

5. Control valve with TCM

OFF vehicle

6. Oil pump assembly

7. Gear system

8. Output shaft

No.

Item

Symptom

Condition

Diagnostic Item

Reference

page

AT-82

TROUBLE DIAGNOSIS

Slips/Will
Not
Engage

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

ON vehicle

1. A/T fluid level and state

2. Line pressure test

3. PNP switch

4. A/T position

5. Control valve with TCM

OFF vehicle

6. Torque converter

7. Oil pump assembly

8. 1st one-way clutch

AT-333

9. Gear system

10. Reverse brake

AT-17, "Cross-Sectional View (VQ35DE Models for 2WD)"

11. Forward one-way clutch (Parts behind drum support is
impossible to perform inspection by disassembly. Refer to

AT-18, "Cross-Sectional View (VK45DE Models for 2WD)"

AT-19, "Cross-Sectional View (AWD Models)"

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

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

ON vehicle

1. A/T fluid level and state

2. Line pressure test

3. PNP switch

4. A/T position

5. Control valve with TCM

OFF vehicle

6. Gear system

7. Output shaft

8. Reverse brake

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

2. A/T fluid level and state

3. A/T position

4. Manual mode switch

AT-167

5. ATF pressure switch 1

AT-172

6. CAN communication line

7. Control valve with TCM

OFF vehicle

8. Front brake (brake band)