Infiniti M45 (Y34). Manual — part 49

TROUBLE DIAGNOSIS

AT-81

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-52

2. Line pressure test

AT-53

3. Accelerator pedal position sensor

AT-152

4. CAN communication line

AT-103

5. ATF pressure switch 1 and front brake solenoid valve

AT-234

,

AT-189

6. Control valve assembly

AT-312

OFF vehicle

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

AT-52, "Fluid Con-

dition Check"

.)

AT-342

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

AT-52, "Fluid

Condition Check"

.)

AT-357

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

AT-52,

"Fluid Condition Check"

.)]

AT-342

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

AT-52, "Fluid Condi-

tion Check"

.)

AT-362

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

AT-52, "Fluid Condi-

tion Check"

.)

AT-334

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

AT-52,

"Fluid Condition Check"

.)

AT-372

Slips at lock-up.

ON vehicle

1. Fluid level and state

AT-52

2. Line pressure test

AT-53

3. Engine speed signal

AT-121

4. Turbine revolution sensor

AT-160

5. Torque converter clutch solenoid valve

AT-123

6. CAN communication line

AT-103

7. Control valve assembly

AT-312

OFF vehicle

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

AT-52, "Fluid Con-

dition Check"

.)

AT-342

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

AT-52, "Fluid

Condition Check"

.)

AT-357

Symptom

Condition

Diagnostic Item

Reference page

AT-82

TROUBLE DIAGNOSIS

Maximum speed
low.

ON vehicle

1. Fluid level and state

AT-52

2. Line pressure test

AT-53

3. Accelerator pedal position sensor

AT-152

4. CAN communication line

AT-103

5. Direct clutch solenoid valve

AT-199

6. Control valve assembly

AT-312

OFF vehicle

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

AT-52, "Fluid Con-

dition Check"

.)

AT-342

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

AT-52, "Fluid

Condition Check"

.)

AT-357

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

AT-52, "Fluid Condition

Check"

.)

AT-362

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

AT-52, "Fluid Condi-

tion Check"

.)

AT-334

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

AT-52,

"Fluid Condition Check"

.)

AT-372

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

AT-52, "Fluid Condi-

tion Check"

.)

AT-374

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

AT-52,

"Fluid Condition Check"

.)

AT-19

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

AT-52, "Fluid Con-

dition Check"

.)

AT-19

No creep at all.
Refer to

AT-265,

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

,

AT-

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

ON vehicle

1. Fluid level and state

AT-52

2. Line pressure test

AT-53

3. Accelerator pedal position sensor

AT-152

4. ATF pressure switch 5 and direct clutch solenoid valve

AT-242

,

AT-199

5. PNP switch

AT-110

6. CAN communication line

AT-103

7. Control linkage adjustment

AT-305

8. Control valve assembly

AT-312

OFF vehicle

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

AT-52, "Fluid Con-

dition Check"

.)

AT-342

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

AT-52, "Fluid

Condition Check"

.)

AT-357

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

AT-52, "Fluid

Condition Check"

.)

AT-367

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

AT-52, "Fluid Condi-

tion Check"

.)

AT-334

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

AT-52, "Fluid Con-

dition Check"

.)

AT-342

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

AT-52, "Fluid Condi-

tion Check"

.)

AT-374

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

AT-52,

"Fluid Condition Check"

.)

AT-19

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

AT-52, "Fluid Con-

dition Check"

.)

AT-19

Symptom

Condition

Diagnostic Item

Reference page

TROUBLE DIAGNOSIS

AT-83

D

E

F

G

H

I

J

K

L

M

A

B

AT

Extremely large
creep.

ON vehicle

1. Engine idle speed

EC-32

2. CAN communication line

AT-103

3. ATF pressure switch 5

AT-242

OFF vehicle

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

AT-52, "Fluid Con-

dition Check"

.)

AT-342

With selector lever
in “P” position, vehi-
cle does not enter
parking condition
or, with selector
lever in another
position, parking
condition is not
cancelled.
Refer to

AT-259, "In

“P” Position, Vehi-
cle Moves When
Pushed"

.

ON vehicle

1. PNP switch

AT-110

2. Control linkage adjustment

AT-305

3. Parking pawl components (ATF condition “NG” only. Refer to

AT-52,

"Fluid Condition Check"

.)

AT-325

Vehicle runs with
transmission in “P”
position.

ON vehicle

1. PNP switch

AT-110

2. Fluid level and state

AT-52

3. Control linkage adjustment

AT-305

4. Control valve assembly

AT-312

5. Parking pawl components (ATF condition “NG” only. Refer to

AT-52,

"Fluid Condition Check"

.)

AT-325

OFF vehicle

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

AT-52, "Fluid Condi-

tion Check"

.)

AT-334

Vehicle runs with
transmission in “N”
position.
Refer to

AT-260, "In

“N” Position, Vehi-
cle Moves"

.

ON vehicle

1. PNP switch

AT-110

2. Fluid level and state

AT-52

3. Control linkage adjustment

AT-305

4. Control valve assembly

AT-312

OFF vehicle

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

AT-52, "Fluid Condition

Check"

.)

AT-362

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

AT-52, "Fluid Condi-

tion Check"

.)

AT-334

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

AT-52, "Fluid Condition

Check"

.)

AT-374

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

AT-52, "Fluid Condi-

tion Check"

.)

AT-342

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

AT-52,

"Fluid Condition Check"

.)

AT-19

10. Low coast brake* (ATF condition “NG” only. Refer to

AT-52, "Fluid

Condition Check"

.)

AT-19

Symptom

Condition

Diagnostic Item

Reference page

AT-84

TROUBLE DIAGNOSIS

Vehicle cannot run
in all positions.

ON vehicle

1. Fluid level and state

AT-52

2. Line pressure test

AT-53

3. PNP switch

AT-110

4. Control linkage adjustment

AT-305

5. Control valve assembly

AT-312

OFF vehicle

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

AT-52, "Fluid

Condition Check"

.)

AT-357

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

AT-52, "Fluid Condi-

tion Check"

.)

AT-334

8. Output shaft (ATF condition “NG” only. Refer to

AT-52, "Fluid Condition

Check"

.)

AT-342

With selector lever
in “D” position, driv-
ing is not possible.

ON vehicle

1. Fluid level and state

AT-52

2. Line pressure test

AT-53

3. PNP switch

AT-110

4. Control linkage adjustment

AT-305

5. Control valve assembly

AT-312

OFF vehicle

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

AT-52, "Fluid Con-

dition Check"

.)

AT-342

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

AT-52, "Fluid

Condition Check"

.)

AT-357

8. 1st one-way clutch (ATF condition “NG” only. Refer to

AT-52, "Fluid

Condition Check"

.)

AT-367

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

AT-52, "Fluid Condi-

tion Check"

.)

AT-334

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

AT-52, "Fluid Con-

dition Check"

.)

AT-342

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

AT-52,

"Fluid Condition Check"

.)

AT-19

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

AT-52, "Fluid Con-

dition Check"

.)

AT-19

With selector lever
in “R” position, driv-
ing is not possible.

ON vehicle

1. Fluid level and state

AT-52

2. Line pressure test

AT-53

3. PNP switch

AT-110

4. Control linkage adjustment

AT-305

5. Control valve assembly

AT-312

OFF vehicle

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

AT-52, "Fluid Condi-

tion Check"

.)

AT-334

7. Output shaft (ATF condition “NG” only. Refer to

AT-52, "Fluid Condition

Check"

.)

AT-342

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

AT-52, "Fluid Condi-

tion Check"

.)

AT-342

Can not be
changed to manual
mode.
Refer to

AT-293,

"Cannot Be
Changed to Manual
Mode"

.

ON vehicle

1. Manual mode switch

AT-230

2. Turbine revolution sensor

AT-160

3. CAN communication line

AT-103

Symptom

Condition

Diagnostic Item

Reference page