Infiniti F50. Manual — part 48

TROUBLE DIAGNOSIS

AT-77

D

E

F

G

H

I

J

K

L

M

A

B

AT

While starting off by
accelerating in 1st,
engine races or
slippage occurs.

ON vehicle

1. Fluid level and state

AT-51

2. Line pressure test

AT-52

3. Accelerator pedal position sensor

AT-144

4. CAN communication line

AT-99

5. Control valve assembly

AT-289

OFF vehicle

6. Torque converter (ATF condition “NG” only. Refer to

AT-51, "Fluid con-

dition check"

.)

AT-307

7. Oil pump assembly (ATF condition “NG” only. Refer to

AT-51, "Fluid

condition check"

.)

AT-321

8. 3rd one-way clutch (ATF condition “NG” only. Refer to

AT-51, "Fluid

condition check"

.)

AT-323

9. 1st one-way clutch (ATF condition “NG” only. Refer to

AT-51, "Fluid

condition check"

.)

AT-331

10. Gear system (ATF condition “NG” only. Refer to

AT-51, "Fluid condi-

tion check"

.)

AT-299

11. Reverse brake (ATF condition “NG” only. Refer to

AT-51, "Fluid condi-

tion check"

.)

AT-307

12. Forward one-way clutch* (ATF condition “NG” only. Refer to

AT-51,

"Fluid condition check"

.)

AT-307

13. Forward brake* (ATF condition “NG” only. Refer to

AT-51, "Fluid con-

dition check"

.)

AT-307

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

ON vehicle

1. Fluid level and state

AT-51

2. Line pressure test

AT-52

3. Accelerator pedal position sensor

AT-144

4. CAN communication line

AT-99

5. ATF pressure switch 5 and direct clutch solenoid valve

AT-227

,

AT-188

6. Control valve assembly

AT-289

OFF vehicle

7. Torque converter (ATF condition “NG” only. Refer to

AT-51, "Fluid con-

dition check"

.)

AT-307

8. Oil pump assembly (ATF condition “NG” only. Refer to

AT-51, "Fluid

condition check"

.)

AT-321

9. 3rd one-way clutch (ATF condition “NG” only. Refer to

AT-51, "Fluid

condition check"

.)

AT-323

10. Gear system (ATF condition “NG” only. Refer to

AT-51, "Fluid condi-

tion check"

.)

AT-299

11. Direct clutch (ATF condition “NG” only. Refer to

AT-51, "Fluid condi-

tion check"

.)

AT-337

12. Forward brake* (ATF condition “NG” only. Refer to

AT-51, "Fluid con-

dition check"

.)

AT-307

Symptom

Condition

Diagnostic Item

Reference page

AT-78

TROUBLE DIAGNOSIS

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

ON vehicle

1. Fluid level and state

AT-51

2. Line pressure test

AT-52

3. Accelerator pedal position sensor

AT-144

4. CAN communication line

AT-99

5. ATF pressure switch 6 and high and low reverse clutch solenoid valve

AT-231

,

AT-197

6. Control valve assembly

AT-289

OFF vehicle

7. Torque converter (ATF condition “NG” only. Refer to

AT-51, "Fluid con-

dition check"

.)

AT-307

8. Oil pump assembly (ATF condition “NG” only. Refer to

AT-51, "Fluid

condition check"

.)

AT-321

9. 3rd one-way clutch (ATF condition “NG” only. Refer to

AT-51, "Fluid

condition check"

.)

AT-323

10. Gear system (ATF condition “NG” only. Refer to

AT-51, "Fluid condi-

tion check"

.)

AT-299

11. High and low reverse clutch (ATF condition “NG” only. Refer to

AT-51,

"Fluid condition check"

.)

AT-336

12. Forward one-way clutch* (ATF condition “NG” only. Refer to

AT-51,

"Fluid condition check"

.)

AT-307

13. Forward brake* (ATF condition “NG” only. Refer to

AT-51, "Fluid con-

dition check"

.)

AT-307

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

ON vehicle

1. Fluid level and state

AT-51

2. Line pressure test

AT-52

3. Accelerator pedal position sensor

AT-144

4. CAN communication line

AT-99

5. ATF pressure switch 3 and input clutch solenoid valve

AT-223

,

AT-170

6. Control valve assembly

AT-289

OFF vehicle

7. Torque converter (ATF condition “NG” only. Refer to

AT-51, "Fluid con-

dition check"

.)

AT-307

8. Oil pump assembly (ATF condition “NG” only. Refer to

AT-51, "Fluid

condition check"

.)

AT-321

9. Input clutch (ATF condition “NG” only. Refer to

AT-51, "Fluid condition

check"

.)

AT-326

10. Gear system (ATF condition “NG” only. Refer to

AT-51, "Fluid condi-

tion check"

.)

AT-299

11. High and low reverse clutch (ATF condition “NG” only. Refer to

AT-51,

"Fluid condition check"

.)

AT-336

12. Direct clutch (ATF condition “NG” only. Refer to

AT-51, "Fluid condi-

tion check"

.)

AT-337

Symptom

Condition

Diagnostic Item

Reference page

TROUBLE DIAGNOSIS

AT-79

D

E

F

G

H

I

J

K

L

M

A

B

AT

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

ON vehicle

1. Fluid level and state

AT-51

2. Line pressure test

AT-52

3. Accelerator pedal position sensor

AT-144

4. CAN communication line

AT-99

5. ATF pressure switch 1 and front brake solenoid valve

AT-219

,

AT-179

6. Control valve assembly

AT-289

OFF vehicle

7. Torque converter (ATF condition “NG” only. Refer to

AT-51, "Fluid con-

dition check"

.)

AT-307

8. Oil pump assembly (ATF condition “NG” only. Refer to

AT-51, "Fluid

condition check"

.)

AT-321

9. Front brake [brake band (ATF condition “NG” only. Refer to

AT-51,

"Fluid condition check"

.)]

AT-307

10. Input clutch (ATF condition “NG” only. Refer to

AT-51, "Fluid condition

check"

.)

AT-326

11. Gear system (ATF condition “NG” only. Refer to

AT-51, "Fluid condi-

tion check"

.)

AT-299

12. High and low reverse clutch (ATF condition “NG” only. Refer to

AT-51,

"Fluid condition check"

.)

AT-336

Slips at lock-up.

ON vehicle

1. Fluid level and state

AT-51

2. Line pressure test

AT-52

3. Engine speed signal

AT-115

4. Turbine revolution sensor

AT-152

5. Torque converter clutch solenoid valve

AT-117

6. CAN communication line

AT-99

7. Control valve assembly

AT-289

OFF vehicle

8. Torque converter (ATF condition “NG” only. Refer to

AT-51, "Fluid con-

dition check"

.)

AT-307

9. Oil pump assembly (ATF condition “NG” only. Refer to

AT-51, "Fluid

condition check"

.)

AT-321

Symptom

Condition

Diagnostic Item

Reference page

AT-80

TROUBLE DIAGNOSIS

Maximum speed
low.

ON vehicle

1. Fluid level and state

AT-51

2. Line pressure test

AT-52

3. Accelerator pedal position sensor

AT-144

4. CAN communication line

AT-99

5. Direct clutch solenoid valve

AT-188

6. Control valve assembly

AT-289

OFF vehicle

7. Torque converter (ATF condition “NG” only. Refer to

AT-51, "Fluid con-

dition check"

.)

AT-307

8. Oil pump assembly (ATF condition “NG” only. Refer to

AT-51, "Fluid

condition check"

.)

AT-321

9. Input clutch (ATF condition “NG” only. Refer to

AT-51, "Fluid condition

check"

.)

AT-326

10. Gear system (ATF condition “NG” only. Refer to

AT-51, "Fluid condi-

tion check"

.)

AT-299

11. High and low reverse clutch (ATF condition “NG” only. Refer to

AT-51,

"Fluid condition check"

.)

AT-336

12. Direct clutch (ATF condition “NG” only. Refer to

AT-51, "Fluid condi-

tion check"

.)

AT-337

13. Forward one-way clutch* (ATF condition “NG” only. Refer to

AT-51,

"Fluid condition check"

.)

AT-307

14. Forward brake* (ATF condition “NG” only. Refer to

AT-51, "Fluid con-

dition check"

.)

AT-307

No creep at all.
Refer to

AT-245,

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

,

AT-

247, "Vehicle Does
Not Creep Forward
In “D” Position"

ON vehicle

1. Fluid level and state

AT-51

2. Line pressure test

AT-52

3. Accelerator pedal position sensor

AT-144

4. ATF pressure switch 5 and direct clutch solenoid valve

AT-227

,

AT-188

5. PNP switch

AT-105

6. CAN communication line

AT-99

7. Control linkage adjustment

AT-282

8. Control valve assembly

AT-289

OFF vehicle

9. Torque converter (ATF condition “NG” only. Refer to

AT-51, "Fluid con-

dition check"

.)

AT-307

10. Oil pump assembly (ATF condition “NG” only. Refer to

AT-51, "Fluid

condition check"

.)

AT-321

11. 1st one-way clutch (ATF condition “NG” only. Refer to

AT-51, "Fluid

condition check"

.)

AT-331

12. Gear system (ATF condition “NG” only. Refer to

AT-51, "Fluid condi-

tion check"

.)

AT-299

13. Reverse brake (ATF condition “NG” only. Refer to

AT-51, "Fluid condi-

tion check"

.)

AT-307

14. Direct clutch (ATF condition “NG” only. Refer to

AT-51, "Fluid condi-

tion check"

.)

AT-337

15. Forward one-way clutch* (ATF condition “NG” only. Refer to

AT-51,

"Fluid condition check"

.)

AT-307

16. Forward brake* (ATF condition “NG” only. Refer to

AT-51, "Fluid con-

dition check"

.)

AT-307

Symptom

Condition

Diagnostic Item

Reference page