Infiniti Q45. Manual - part 40

2. Line pressure test

3. Accelerator pedal position sensor

4. CAN communication line

5. PNP switch

AT-107

6. A/T position

AT-218

7. Control valve with TCM

OFF vehicle

8. Torque converter

9. Oil pump assembly

10. 1st one-way clutch

AT-287

11. Gear system

12. Reverse brake

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

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

With selector lever in
“R” position, accelera-
tion is extremely poor.

ON vehicle

1. A/T fluid level and state

2. Line pressure test

3. Accelerator pedal position sensor

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

AT-171

AT-153

5. CAN communication line

6. PNP switch

AT-107

7. A/T position

AT-218

8. Control valve with TCM

OFF vehicle

9. Gear system

10. Output shaft

11. Reverse brake

No.

Items

Symptom

Condition

Diagnostic Item

Reference

page

AT-74

TROUBLE DIAGNOSIS

Slips/Will
Not
Engage

While starting off by
accelerating in 1st,
engine races or slip-
page occurs.

ON vehicle

1. A/T fluid level and state

2. Line pressure test

3. Accelerator pedal position sensor

4. CAN communication line

5. Control valve with TCM

OFF vehicle

6. Torque converter

7. Oil pump assembly

8. 3rd one-way clutch

AT-280

9. 1st one-way clutch

AT-287

10. Gear system

11. Reverse brake

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

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

While accelerating in
2nd, 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 5 and direct clutch solenoid valve

AT-169

AT-149

6. Control valve with TCM

OFF vehicle

7. Torque converter

8. Oil pump assembly

9. 3rd one-way clutch

AT-280

10. Gear system

11. Direct clutch

AT-294

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

No.

Items

Symptom

Condition

Diagnostic Item

Reference

page

TROUBLE DIAGNOSIS

AT-75

Slips/Will
Not
Engage

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-171

AT-153

6. Control valve with TCM

OFF vehicle

7. Torque converter

8. Oil pump assembly

9. 3rd one-way clutch

AT-280

10. Gear system

11. High and low reverse clutch

AT-292

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

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

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-167

AT-141

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-292

12. Direct clutch

AT-294

No.

Items

Symptom

Condition

Diagnostic Item

Reference

page

AT-76

TROUBLE DIAGNOSIS

Slips/Will
Not
Engage

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-165

AT-145

6. Control valve with TCM

OFF vehicle

7. Torque converter

8. Oil pump assembly

9. Front brake (brake band)

10. Input clutch

AT-282

11. Gear system

12. High and low reverse clutch

AT-292

Slips at lock-up.

ON vehicle

1. A/T fluid level and state

2. Line pressure test

3. Engine speed signal

AT-118

4. Turbine revolution sensor

AT-111

5. Torque converter clutch solenoid valve

AT-120

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 creep at all.
Refer to

AT-188,

AT-190,

"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-169

AT-149

5. PNP switch

AT-107

6. CAN communication line

7. A/T position

AT-218

8. Control valve with TCM

OFF vehicle

9. Torque converter

10. Oil pump assembly

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

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