Infiniti Q45. Manual - part 72

TROUBLE DIAGNOSIS FOR SYMPTOMS

AT-201

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E

F

G

H

I

J

K

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M

A

B

AT

6. 

DETECT MALFUNCTIONING ITEM

1.

Check control valve with TCM. Refer to 

AT-225, "Control Valve with TCM and A/T Fluid Temperature Sen-

sor 2"

 .

2.

Disassemble A/T. Refer to 

AT-261, "DISASSEMBLY"

 .

3.

Check the following.

–

Oil pump assembly. Refer to 

AT-277, "Oil Pump"

 .

–

Power train system. Refer to 

AT-261, "DISASSEMBLY"

 .

–

Transmission case. Refer to 

AT-261, "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-225, "Control Valve with TCM and A/T Fluid Temperature Sensor 2"

 .

2.

Check A/T fluid condition. Refer to 

AT-51, "A/T Fluid Condition Check"

 .

OK or NG

OK

>> GO TO 8.

NG

>> GO TO 11.

8. 

DETECT MALFUNCTIONING ITEM

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

AT-61,

"Symptom 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-57, "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-84, "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 the malfunction items. If any items are damaged, repair or replace damaged parts. Refer to 

AT-61,

"Symptom Chart"

  (Symptom No.13). 

OK or NG

OK

>> GO TO 9.

NG

>> Repair or replace damaged parts.

AT-202

TROUBLE DIAGNOSIS FOR SYMPTOMS

A/T Does Not Lock-up

NCS0010Q

SYMPTOM:

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

DIAGNOSTIC PROCEDURE

1. 

CHECK SELF-DIAGNOSTIC RESULTS

Perform self-diagnosis. Refer to 

AT-87, "SELF-DIAGNOSTIC RESULT MODE"

 , 

AT-97, "Diagnostic Procedure

without CONSULT-II"

 .

Is any malfunction detected by self-diagnostic results?

YES

>> Check the malfunctioning system. Refer to 

AT-87, "SELF-DIAGNOSTIC RESULT MODE"

 , 

AT-98,

"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-53, "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-225, "Control Valve with TCM and A/T Fluid Temperature Sen-

sor 2"

 .

2.

Disassemble A/T. Refer to 

AT-261, "DISASSEMBLY"

 .

3.

Check the following.

–

Oil pump assembly. Refer to 

AT-277, "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-225, "Control Valve with TCM and A/T Fluid Temperature Sen-

sor 2"

 .

2.

Disassemble A/T. Refer to 

AT-261, "DISASSEMBLY"

 .

3.

Check the following.

–

Oil pump assembly. Refer to 

AT-277, "Oil Pump"

 .

–

Power train system. Refer to 

AT-261, "DISASSEMBLY"

 .

–

Transmission case. Refer to 

AT-261, "DISASSEMBLY"

 .

OK or NG

OK

>> GO TO 6.

NG

>> Repair or replace damaged parts.

TROUBLE DIAGNOSIS FOR SYMPTOMS

AT-203

D

E

F

G

H

I

J

K

L

M

A

B

AT

6. 

CHECK A/T FLUID CONDITION

1.

Remove oil pan. Refer to 

AT-225, "Control Valve with TCM and A/T Fluid Temperature Sensor 2"

 .

2.

Check A/T fluid condition. Refer to 

AT-51, "A/T Fluid Condition Check"

 .

OK or NG

OK

>> GO TO 7.

NG

>> GO TO 10.

7. 

DETECT MALFUNCTIONING ITEM

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

AT-61,

"Symptom 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-57, "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-84, "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 the malfunction items. If any items are damaged, repair or replace damaged parts. Refer to 

AT-61,

"Symptom 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

NCS0010R

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-87, "SELF-DIAGNOSTIC RESULT MODE"

 , 

AT-97, "Diagnostic Procedure

without CONSULT-II"

 .

Is any malfunction detected by self-diagnostic results?

YES

>> Check the malfunctioning system. Refer to 

AT-87, "SELF-DIAGNOSTIC RESULT MODE"

 , 

AT-98,

"Judgement Self-diagnosis Code"

 .

NO

>> GO TO 2.

AT-204

TROUBLE DIAGNOSIS FOR SYMPTOMS

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 A/T FLUID CONDITION

1.

Remove oil pan. Refer to 

AT-225, "Control Valve with TCM and A/T Fluid Temperature Sensor 2"

 .

2.

Check A/T fluid condition. Refer to 

AT-51, "A/T Fluid Condition Check"

 .

OK or NG

OK

>> GO TO 4.

NG

>> GO TO 7.

4. 

DETECT MALFUNCTIONING ITEM

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

AT-61,

"Symptom Chart"

  (Symptom No.25).

OK or NG

OK

>> GO TO 5.

NG

>> Repair or replace damaged parts.

5. 

CHECK SYMPTOM

Check again. Refer to 

AT-57, "Cruise Test - Part 1"

 .

OK or NG

OK

>> INSPECTION END

NG

>> GO TO 6.

6. 

CHECK TCM

1.

Check TCM input/output signals. Refer to 

AT-84, "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.

7. 

DETECT MALFUNCTIONING ITEM

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

AT-61,

"Symptom Chart"

  (Symptom No.25).

OK or NG

OK

>> GO TO 5.

NG

>> Repair or replace damaged parts.