Infiniti M45 (Y34). Manual — part 45

TROUBLE DIAGNOSIS

AT-65

D

E

F

G

H

I

J

K

L

M

A

B

AT

Shock is too large
for upshift when
accelerator pedal is
released.

ON vehicle

1. Accelerator pedal position sensor

AT-152

2. Control linkage adjustment

AT-305

3. Engine speed signal

AT-121

4. CAN communication line

AT-103

5. Turbine revolution sensor

AT-160

6. Vehicle speed sensor A/T and vehicle speed sensor MTR

AT-116

,

AT-165

7. Fluid level and state

AT-52

8. Control valve assembly

AT-312

OFF vehicle

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. 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

Shock is too large
for lock-up.

ON vehicle

1. Accelerator pedal position sensor

AT-152

2. Control linkage adjustment

AT-305

3. Engine speed signal

AT-121

4. CAN communication line

AT-103

5. Turbine revolution sensor

AT-160

6. Vehicle speed sensor A/T and vehicle speed sensor MTR

AT-116

,

AT-165

7. Torque converter clutch solenoid valve

AT-123

8. Fluid level and state

AT-52

9. Control valve assembly

AT-312

OFF vehicle

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

AT-52, "Fluid

Condition Check"

.)

AT-342

Shock is too large
during engine
brake.

ON vehicle

1. Accelerator pedal position sensor

AT-152

2. Control linkage adjustment

AT-305

3. CAN communication line

AT-103

4. Fluid level and state

AT-52

5. Control valve assembly

AT-312

OFF vehicle

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

AT-52,

"Fluid Condition Check"

.)]

AT-342

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

AT-52, "Fluid Condition

Check"

.)

AT-362

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

AT-52,

"Fluid Condition Check"

.)

AT-372

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

AT-52, "Fluid Condition

Check"

.)

AT-374

Symptom

Condition

Diagnostic Item

Reference page

AT-66

TROUBLE DIAGNOSIS

Judder occurs dur-
ing lock-up.

ON vehicle

1. Fluid level and state

AT-52

2. Engine speed signal

AT-121

3. Turbine revolution sensor

AT-160

4. Vehicle speed sensor A/T and vehicle speed sensor MTR

AT-116

,

AT-165

5. Accelerator pedal position sensor

AT-152

6. CAN communication line

AT-103

7. Torque converter clutch solenoid valve

AT-123

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

Strange noise in “R”
position.

ON vehicle

1. Fluid level and state

AT-52

2. Engine speed signal

AT-121

3. CAN communication line

AT-103

4. Control valve assembly

AT-312

OFF vehicle

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

AT-52, "Fluid Con-

dition Check"

.)

AT-342

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

AT-52,

"Fluid Condition Check"

.)

AT-372

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

AT-52, "Fluid Condi-

tion Check"

.)

AT-342

Strange noise in “N”
position.

ON vehicle

1. Fluid level and state

AT-52

2. Engine speed signal

AT-121

3. CAN communication line

AT-103

4. Control valve assembly

AT-312

OFF vehicle

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

AT-52, "Fluid Con-

dition Check"

.)

AT-342

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

Strange noise in “D”
position.

ON vehicle

1. Fluid level and state

AT-52

2. Engine speed signal

AT-121

3. CAN communication line

AT-103

4. Control valve assembly

AT-312

OFF vehicle

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

AT-52, "Fluid Con-

dition Check"

.)

AT-342

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

AT-52, "Fluid Condi-

tion Check"

.)

AT-19

Symptom

Condition

Diagnostic Item

Reference page

TROUBLE DIAGNOSIS

AT-67

D

E

F

G

H

I

J

K

L

M

A

B

AT

When “ D” or “M”
position, remains in
1st gear.

ON vehicle

1. Fluid level and state

AT-52

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

AT-116

,

AT-165

3. Direct clutch solenoid valve

AT-199

4. Line pressure test

AT-53

5. CAN communication line

AT-103

6. Control valve assembly

AT-312

OFF vehicle

7. 3rd one-way clutch (ATF condition “NG” only. Refer to

AT-52, "Fluid

Condition Check"

.)

AT-360

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

When “D” or “M”
position, remains in
2nd gear.

ON vehicle

1. Fluid level and state

AT-52

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

AT-116

,

AT-165

3. Low coast brake solenoid valve

AT-220

4. Line pressure test

AT-53

5. CAN communication line

AT-103

6. Control valve assembly

AT-312

OFF vehicle

7. 3rd one-way clutch (ATF condition “NG” only. Refer to

AT-52, "Fluid

Condition Check"

.)

AT-360

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

AT-52, "Fluid Condi-

tion Check"

.)

AT-334

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

AT-52, "Fluid Condition

Check"

.)

AT-374

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

AT-52, "Fluid Con-

dition Check"

.)

AT-19

When “D” or “M”
position, remains in
3rd gear.

ON vehicle

1. Fluid level and state

AT-52

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

AT-116

,

AT-165

3. Line pressure test

AT-53

4. CAN communication line

AT-103

5. Control valve assembly

AT-312

OFF vehicle

6. 3rd one-way clutch (ATF condition “NG” only. Refer to

AT-52, "Fluid

Condition Check"

.)

AT-360

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

AT-52, "Fluid Condi-

tion Check"

.)

AT-334

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

AT-52,

"Fluid Condition Check"

.)

AT-372

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

AT-52,

"Fluid Condition Check"

.)

AT-19

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

AT-52, "Fluid Con-

dition Check"

.)

AT-19

Symptom

Condition

Diagnostic Item

Reference page

AT-68

TROUBLE DIAGNOSIS

When “D” or “M”
position, remains in
4th gear.

ON vehicle

1. Fluid level and state

AT-52

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

AT-116

,

AT-165

3. ATF pressure switch 3 and input clutch solenoid valve

AT-238

,

AT-179

4. ATF pressure switch 5 and direct clutch solenoid valve

AT-242

,

AT-199

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

AT-246

,

AT-209

6. Low coast brake solenoid valve

AT-220

7. Front brake solenoid valve

AT-189

8. Line pressure test

AT-53

9. CAN communication line

AT-103

10. Control valve assembly

AT-312

OFF vehicle

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

AT-52, "Fluid Condition

Check"

.)

AT-362

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

AT-52, "Fluid Condi-

tion Check"

.)

AT-334

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

AT-52,

"Fluid Condition Check"

.)

AT-372

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

AT-52, "Fluid Condi-

tion Check"

.)

AT-374

When “D” or “M”
position, remains in
5th gear.

ON vehicle

1. Fluid level and state

AT-52

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

AT-116

,

AT-165

3. ATF pressure switch 1 and front brake solenoid valve

AT-234

,

AT-189

4. Line pressure test

AT-53

5. CAN communication line

AT-103

6. Control valve assembly

AT-312

OFF vehicle

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

AT-52,

"Fluid Condition Check"

.)]

AT-342

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

AT-52, "Fluid Condition

Check"

.)

AT-362

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

AT-52, "Fluid Condi-

tion Check"

.)

AT-334

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

AT-52,

"Fluid Condition Check"

.)

AT-372

Symptom

Condition

Diagnostic Item

Reference page