Infiniti M35/M45 Y50. Manual — part 37

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

3. Line pressure test

4. CAN communication line

5. Control valve with TCM

OFF vehicle

6. 3rd one-way clutch

7. Gear system

8. High and low reverse clutch

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

9. 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)"

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

When “D” or “M” posi-
tion, remains in 4th
gear.

ON vehicle

1. A/T fluid level and state

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

3. ATF pressure switch 3 and input clutch solenoid valve

AT-174

AT-147

4. ATF pressure switch 5 and direct clutch solenoid valve

AT-176

AT-155

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

AT-178

AT-159

6. Low coast brake solenoid valve

AT-163

7. Front brake solenoid valve

AT-151

8. Line pressure test

9. CAN communication line

10. Control valve with TCM

OFF vehicle

11. Input clutch

AT-327

12. Gear system

13. High and low reverse clutch

14. Direct clutch

AT-341

No.

Item

Symptom

Condition

Diagnostic Item

Reference

page

AT-72

TROUBLE DIAGNOSIS

Slips/Will
Not
Engage

When “D” or “M” posi-
tion, remains in 5th
gear.

ON vehicle

1. A/T fluid level and state

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

3. ATF pressure switch 1 and front brake solenoid valve

AT-172

AT-151

4. Line pressure test

5. CAN communication line

6. Control valve with TCM

OFF vehicle

7. Front brake (brake band)

8. Input clutch

AT-327

9. Gear system

10. High and low reverse clutch

"Vehicle Cannot Be
Started from D

Vehicle cannot be
started from D

Refer to

AT-199,

ON vehicle

1. A/T fluid level and state

2. Accelerator pedal position sensor

AT-132

3. Line pressure test

4. CAN communication line

5. Control valve with TCM

OFF vehicle

6. Torque converter

7. Oil pump assembly

8. 3rd one-way clutch

9. 1st one-way clutch

AT-333

10. Gear system

11. Reverse brake

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

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

Does not lock-up.
Refer to

AT-209, "A/T

Does Not 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

Does Not Hold Lock-
up Condition"

No.

Item

Symptom

Condition

Diagnostic Item

Reference

page

TROUBLE DIAGNOSIS

AT-73

Slips/Will
Not
Engage

Does not hold lock-up
condition.
Refer to

AT-210, "A/T

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

"Lock-up Is Not
Released"

Lock-up is not
released.
Refer to

AT-212,

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

No shock at all or the
clutch slips when
vehicle changes
speed D

→

ON vehicle

1. A/T fluid level and state

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

3. ATF pressure switch 5 and direct clutch solenoid valve

AT-176

AT-155

4. CAN communication line

5. Line pressure test

6. Control valve with TCM

OFF vehicle

7. Torque converter

8. Oil pump assembly

9. 3rd one-way clutch

10. Gear system

11. Direct clutch

AT-341

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

No.

Item

Symptom

Condition

Diagnostic Item

Reference

page

AT-74

TROUBLE DIAGNOSIS

Slips/Will
Not
Engage

No shock at all or the
clutch slips when
vehicle changes
speed D

→

ON vehicle

1. A/T fluid level and state

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

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

AT-178

AT-159

4. CAN communication line

5. Line pressure test

6. Control valve with TCM

OFF vehicle

7. Torque converter

8. Oil pump assembly

9. 3rd one-way clutch

10. Gear system

11. High and low reverse clutch

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

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 shock at all or the
clutch slips when
vehicle changes
speed D

→

ON vehicle

1. A/T fluid level and state

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

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

6. Line pressure test

7. Control valve with TCM

OFF vehicle

8. Torque converter

9. Oil pump assembly

10. Input clutch

11. Gear system

12. High and low reverse clutch