Infiniti M45 (Y34). Manual — part 46

TROUBLE DIAGNOSIS

AT-69

D

E

F

G

H

I

J

K

L

M

A

B

AT

Vehicle cannot be
started from D

1

.

Refer to

AT-271,

"Vehicle Cannot Be
Started From D

1

"

.

ON vehicle

1. Fluid level and state

AT-52

2. Accelerator pedal position sensor

AT-152

3. Line pressure test

AT-53

4. CAN communication line

AT-103

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

AT-52, "Fluid

Condition Check"

.)

AT-360

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

AT-52, "Fluid

Condition Check"

.)

AT-367

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

AT-52, "Fluid Condi-

tion Check"

.)

AT-334

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

AT-52, "Fluid Con-

dition Check"

.)

AT-342

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

AT-52,

"Fluid Condition Check"

.)

AT-19

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

AT-52, "Fluid Con-

dition Check"

.)

AT-19

Gear does not
change from D

1

→

D

2

or from M

1

→

M

2

.

Refer to

AT-274, "A/

T Does Not Shift:
D

1

→

D

2

"

.

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 5 and direct clutch solenoid valve

AT-242

,

AT-199

4. Line pressure test

AT-53

5. CAN communication line

AT-103

6. Control valve assembly

AT-312

OFF vehicle

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

AT-52, "Fluid Condition

Check"

.)

AT-374

Gear does not
change from D

2

→

D

3

or from M

2

→

M

3

.

Refer to

AT-277, "A/

T Does Not Shift:
D

2

→

D

3

"

.

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 6 and high and low reverse clutch solenoid valve.

AT-246

,

AT-209

4. Line pressure test

AT-53

5. CAN communication line

AT-103

6. Control valve assembly

AT-312

OFF vehicle

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

AT-52,

"Fluid Condition Check"

.)

AT-372

Gear does not
change from D

3

→

D

4

or from M

3

→

M

4

.

Refer to

AT-280, "A/

T Does Not Shift:
D

3

→

D

4

"

.

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 1 and front brake solenoid valve

AT-234

,

AT-189

5. Line pressure test

AT-53

6. CAN communication line

AT-103

7. Control valve assembly

AT-312

OFF vehicle

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

AT-52, "Fluid Condition

Check"

.)

AT-362

Symptom

Condition

Diagnostic Item

Reference page

AT-70

TROUBLE DIAGNOSIS

Gear does not
change from D

4

→

D

5

or from M

4

→

M

5

.

Refer to

AT-283, "A/

T Does Not Shift:
D

4

→

D

5

"

.

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. ATF pressure switch 5 and direct clutch solenoid valve

AT-242

,

AT-199

5. Turbine revolution sensor

AT-160

6. Line pressure test

AT-53

7. CAN communication line

AT-103

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

In “D” or “M” range,
does not downshift
to 4th gear.
Refer to

AT-294, "A/

T Does Not Shift:
5th Gear

→

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 1 and front brake solenoid valve

AT-234

,

AT-189

4. ATF pressure switch 5 and direct clutch solenoid valve

AT-242

,

AT-199

5. CAN communication line

AT-103

6. Line pressure test

AT-53

7. Control valve assembly

AT-312

OFF vehicle

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

AT-52,

"Fluid Condition Check"

.)]

AT-342

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

AT-52, "Fluid Condition

Check"

.)

AT-362

In “D” or “M” range,
does not downshift
to 3rd gear.
Refer to

AT-296, "A/

T Does Not Shift:
4th Gear

→

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. ATF pressure switch 3 and input clutch solenoid valve

AT-238

,

AT-179

4. ATF pressure switch 1 and front brake solenoid valve

AT-234

,

AT-189

5. CAN communication line

AT-103

6. Line pressure test

AT-53

7. Control valve assembly

AT-312

OFF vehicle

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

AT-52, "Fluid Condition

Check"

.)

AT-362

In “D” or “M” range,
does not downshift
to 2nd gear.
Refer to

AT-298, "A/

T Does Not Shift:
3rd Gear

→

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

AT-246

,

AT-209

4. CAN communication line

AT-103

5. Line pressure test

AT-53

6. Control valve assembly

AT-312

OFF vehicle

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

AT-52,

"Fluid Condition Check"

.)

AT-372

Symptom

Condition

Diagnostic Item

Reference page

TROUBLE DIAGNOSIS

AT-71

D

E

F

G

H

I

J

K

L

M

A

B

AT

In “D” or “M” range,
does not downshift
to 1st gear.
Refer to

AT-300, "A/

T Does Not Shift:
2nd Gear

→

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. ATF pressure switch 5 and direct clutch solenoid valve

AT-242

,

AT-199

4. CAN communication line

AT-103

5. Line pressure test

AT-53

6. Control valve assembly

AT-312

OFF vehicle

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

AT-52, "Fluid Condition

Check"

.)

AT-374

Does not lock-up.
Refer to

AT-286, "A/

T Does Not Per-
form 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

Does not hold lock-
up condition.
Refer to

AT-288, "A/

T Does Not Hold
Lock-up Condition"

.

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

Lock-up is not
released.
Refer to

AT-290,

"Lock-up is Not
Released"

.

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-72

TROUBLE DIAGNOSIS

Does not change
M

5

→

M

4

.

ON vehicle

1. PNP switch

AT-110

2. Fluid level and state

AT-52

3. Control linkage adjustment

AT-305

4. Manual mode switch

AT-230

5. ATF pressure switch 1

AT-234

6. CAN communication line

AT-103

7. Control valve assembly

AT-312

OFF vehicle

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

AT-52,

"Fluid Condition Check"

.)]

AT-342

Does not change
M

4

→

M

3

.

ON vehicle

1. PNP switch

AT-110

2. Fluid level and state

AT-52

3. Control linkage adjustment

AT-304

4. Manual mode switch

AT-230

5. ATF pressure switch 1 and ATF pressure switch 3

AT-234

,

AT-238

6. CAN communication line

AT-103

7. Control valve assembly

AT-312

OFF vehicle

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

AT-52,

"Fluid Condition Check"

.)]

AT-340

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

AT-52, "Fluid Condition

Check"

.)

AT-362

Does not change
M

3

→

M

2

.

ON vehicle

1. PNP switch

AT-110

2. Fluid level and state

AT-52

3. Control linkage adjustment

AT-305

4. Manual mode switch

AT-230

5. ATF pressure switch 6

AT-246

6. CAN communication line

AT-103

7. Control valve assembly

AT-312

OFF vehicle

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

AT-52,

"Fluid Condition Check"

.)]

AT-342

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

AT-52, "Fluid Condition

Check"

.)

AT-362

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

AT-52,

"Fluid Condition Check"

.)

AT-372

Does not change
M

2

→

M

1

.

ON vehicle

1. PNP switch

AT-110

2. Fluid level and state

AT-52

3. Control linkage adjustment

AT-305

4. Manual mode switch

AT-230

5. ATF pressure switch 5

AT-242

6. CAN communication line

AT-103

7. Control valve assembly

AT-312

OFF vehicle

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

AT-52, "Fluid Condition

Check"

.)

AT-362

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

AT-52,

"Fluid Condition Check"

.)

AT-372

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

AT-52, "Fluid Condi-

tion Check"

.)

AT-374

Symptom

Condition

Diagnostic Item

Reference page