Infiniti M35/M45 Y50. Manual - part 71

 

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Infiniti M35/M45 Y50. Manual - part 71

 

 

TROUBLE DIAGNOSIS FOR SYMPTOMS

AT-207

D

E

F

G

H

I

J

K

L

M

A

B

AT

A/T Does Not Shift: D

4

  

 D

5

NCS001QA

SYMPTOM:

The vehicle does not shift-up from the D

4

 to D

5

 gear at the specified speed.

The vehicle does not shift-up from the D

4

  to D

5

 gear unless A/T is warmed up.

DIAGNOSTIC PROCEDURE

1. 

CONFIRM THE SYMPTOM

Check if vehicle creep forward in “D” position and vehicle can be started from D

1.

OK or NG

OK

>> GO TO 2.

NG

>> Refer to 

AT-197, "Vehicle Does Not Creep Forward in “D” Position"

 , 

AT-199, "Vehicle Cannot Be

Started from D

1

"

 .

2. 

CHECK SELF-DIAGNOSTIC RESULTS

Perform self-diagnosis. Refer to 

AT-92, "SELF-DIAGNOSTIC RESULT MODE"

 , 

AT-103, "TCM SELF-DIAG-

NOSTIC PROCEDURE (NO TOOLS)"

Is any malfunction detected by self-diagnostic results?

YES

>> Check malfunctioning system. Refer to 

AT-92, "SELF-DIAGNOSTIC RESULT MODE"

 , 

AT-104,

"Judgement Self-diagnosis Code"

 .

NO

>> GO TO 3.

3. 

CHECK A/T FLUID LEVEL

Check A/T fluid level. Refer to 

AT-13, "Checking A/T Fluid"

 .

OK or NG

OK

>> GO TO 4.

NG

>> Refill ATF.

4. 

CHECK LINE PRESSURE

Check line pressure at the engine stall point. Refer to 

AT-55, "LINE PRESSURE TEST"

 .

OK or NG

OK

>> GO TO 7.

NG - 1 >> Line pressure high: GO TO 5.
NG - 2 >> Line pressure low: GO TO 6.

5. 

DETECT MALFUNCTIONING ITEM

1.

Check control valve with TCM. Refer to 

AT-236, "Control Valve With TCM and A/T Fluid Temperature Sen-

sor 2"

 .

2.

Disassemble A/T. Refer to 

AT-301, "DISASSEMBLY"

 .

3.

Check the following.

Oil pump assembly. Refer to 

AT-322, "Oil Pump"

 .

OK or NG

OK

>> GO TO 7.

NG

>> Repair or replace damaged parts.

AT-208

TROUBLE DIAGNOSIS FOR SYMPTOMS

6. 

DETECT MALFUNCTIONING ITEM

1.

Check control valve with TCM. Refer to 

AT-236, "Control Valve With TCM and A/T Fluid Temperature Sen-

sor 2"

 .

2.

Disassemble A/T. Refer to 

AT-301, "DISASSEMBLY"

 .

3.

Check the following.

Oil pump assembly. Refer to 

AT-322, "Oil Pump"

 .

Power train system. Refer to 

AT-301, "DISASSEMBLY"

 .

Transmission case. Refer to 

AT-301, "DISASSEMBLY"

 .

OK or NG

OK

>> GO TO 7.

NG

>> Repair or replace damaged parts.

7. 

CHECK A/T FLUID CONDITION

1.

Remove oil pan. Refer to 

AT-236, "Control Valve With TCM and A/T Fluid Temperature Sensor 2"

 .

2.

Check A/T fluid condition. Refer to 

AT-53, "A/T Fluid Condition Check"

 .

OK or NG

OK

>> GO TO 8.

NG

>> GO TO 11.

8. 

DETECT MALFUNCTIONING ITEM

Check malfunction items. If any items are damaged, repair or replace damaged parts. Refer to 

AT-64, "Symp-

tom Chart"

  (Symptom No.13).

OK or NG

OK

>> GO TO 9.

NG

>> Repair or replace damaged parts.

9. 

CHECK SYMPTOM

Check again. Refer to 

AT-59, "Cruise Test - Part 1"

 .

OK or NG

OK

>> INSPECTION END

NG

>> GO TO 10.

10. 

CHECK TCM

1.

Check TCM input/output signals. Refer to 

AT-89, "TCM Input/Output Signal Reference Values"

 .

2.

If NG, recheck A/T assembly harness connector terminals for damage or loose connection with harness
connector.

OK or NG

OK

>> INSPECTION END

NG

>> Repair or replace damaged parts.

11. 

DETECT MALFUNCTIONING ITEM

Check malfunction items. If any items are damaged, repair or replace damaged parts. Refer to 

AT-64, "Symp-

tom Chart"

  (Symptom No.13). 

OK or NG

OK

>> GO TO 9.

NG

>> Repair or replace damaged parts.

TROUBLE DIAGNOSIS FOR SYMPTOMS

AT-209

D

E

F

G

H

I

J

K

L

M

A

B

AT

A/T Does Not Lock-up

NCS001QB

SYMPTOM:

A/T does not lock-up at the specified speed.

DIAGNOSTIC PROCEDURE

1. 

CHECK SELF-DIAGNOSTIC RESULTS

Perform self-diagnosis. Refer to 

AT-92, "SELF-DIAGNOSTIC RESULT MODE"

 , 

AT-103, "TCM SELF-DIAG-

NOSTIC PROCEDURE (NO TOOLS)"

 .

Is any malfunction detected by self-diagnostic results?

YES

>> Check malfunctioning system. Refer to 

AT-92, "SELF-DIAGNOSTIC RESULT MODE"

 , 

AT-104,

"Judgement Self-diagnosis Code"

 .

NO

>> GO TO 2.

2. 

CHECK A/T FLUID LEVEL

Check A/T fluid level. Refer to 

AT-13, "Checking A/T Fluid"

 .

OK or NG

OK

>> GO TO 3.

NG

>> Refill ATF.

3. 

CHECK LINE PRESSURE

Check line pressure at the engine stall point. Refer to 

AT-55, "LINE PRESSURE TEST"

 .

OK or NG

OK

>> GO TO 6.

NG - 1 >> Line pressure high: GO TO 4.
NG - 2 >> Line pressure low: GO TO 5.

4. 

DETECT MALFUNCTIONING ITEM

1.

Check control valve with TCM. Refer to 

AT-236, "Control Valve With TCM and A/T Fluid Temperature Sen-

sor 2"

 .

2.

Disassemble A/T. Refer to 

AT-301, "DISASSEMBLY"

 .

3.

Check the following.

Oil pump assembly. Refer to 

AT-322, "Oil Pump"

 .

OK or NG

OK

>> GO TO 6.

NG

>> Repair or replace damaged parts.

5. 

DETECT MALFUNCTIONING ITEM

1.

Check control valve with TCM. Refer to 

AT-236, "Control Valve With TCM and A/T Fluid Temperature Sen-

sor 2"

 .

2.

Disassemble A/T. Refer to 

AT-301, "DISASSEMBLY"

 .

3.

Check the following.

Oil pump assembly. Refer to 

AT-322, "Oil Pump"

 .

Power train system. Refer to 

AT-301, "DISASSEMBLY"

 .

Transmission case. Refer to 

AT-301, "DISASSEMBLY"

 .

OK or NG

OK

>> GO TO 6.

NG

>> Repair or replace damaged parts.

AT-210

TROUBLE DIAGNOSIS FOR SYMPTOMS

6. 

CHECK A/T FLUID CONDITION

1.

Remove oil pan. Refer to 

AT-236, "Control Valve With TCM and A/T Fluid Temperature Sensor 2"

 .

2.

Check A/T fluid condition. Refer to 

AT-53, "A/T Fluid Condition Check"

 .

OK or NG

OK

>> GO TO 7.

NG

>> GO TO 10.

7. 

DETECT MALFUNCTIONING ITEM

Check malfunction items. If any items are damaged, repair or replace damaged parts. Refer to 

AT-64, "Symp-

tom Chart"

  (Symptom No.24).

OK or NG

OK

>> GO TO 8.

NG

>> Repair or replace damaged parts.

8. 

CHECK SYMPTOM

Check again. Refer to 

AT-59, "Cruise Test - Part 1"

 .

OK or NG

OK

>> INSPECTION END

NG

>> GO TO 9.

9. 

CHECK TCM

1.

Check TCM input/output signals. Refer to 

AT-89, "TCM Input/Output Signal Reference Values"

 .

2.

If NG, recheck A/T assembly harness connector terminals for damage or loose connection with harness
connector.

OK or NG

OK

>> INSPECTION END

NG

>> Repair or replace damaged parts.

10. 

DETECT MALFUNCTIONING ITEM

Check malfunction items. If any items are damaged, repair or replace damaged parts. Refer to 

AT-64, "Symp-

tom Chart"

  (Symptom No.24).

OK or NG

OK

>> GO TO 8.

NG

>> Repair or replace damaged parts.

A/T Does Not Hold Lock-up Condition

NCS001QC

SYMPTOM:

The lock-up condition cannot be maintained for more than 30 seconds.

DIAGNOSTIC PROCEDURE

1. 

CHECK SELF-DIAGNOSTIC RESULTS

Perform self-diagnosis. Refer to 

AT-92, "SELF-DIAGNOSTIC RESULT MODE"

 , 

AT-103, "TCM SELF-DIAG-

NOSTIC PROCEDURE (NO TOOLS)"

 .

Is any malfunction detected by self-diagnostic results?

YES

>> Check malfunctioning system. Refer to 

AT-92, "SELF-DIAGNOSTIC RESULT MODE"

 , 

AT-104,

"Judgement Self-diagnosis Code"

 .

NO

>> GO TO 2.

 

 

 

 

 

 

 

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