Infiniti F50. Manual - part 94

TROUBLE DIAGNOSIS FOR SYMPTOMS

AT-261

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4. 

CHECK LINE PRESSURE

Check line pressure at the engine stall point. Refer to 

AT-52, "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.

Control valve assembly. Refer to 

AT-289, "Control Valve Assembly"

 .

2.

Disassemble A/T. Refer to 

AT-307, "DISASSEMBLY"

 .

3.

Check the following items:

–

Oil pump assembly. Refer to 

AT-321, "Oil Pump"

 .

OK or NG

OK

>> GO TO 7.

NG

>> Repair or replace damaged parts.

6. 

DETECT MALFUNCTIONING ITEM

1.

Control valve assembly. Refer to 

AT-289, "Control Valve Assembly"

 .

2.

Disassemble A/T. Refer to 

AT-307, "DISASSEMBLY"

 .

3.

Check the following items:

–

Oil pump assembly. Refer to 

AT-321, "Oil Pump"

 .

–

Power train system. Refer to 

AT-307, "DISASSEMBLY"

 .

–

Transmission case. Refer to 

AT-307, "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-289, "Control Valve Assembly"

 .

2.

Check A/T fluid condition.

OK or NG

OK

>> GO TO 8.

NG

>> GO TO 11.

SAT494G

SAT171B

AT-262

TROUBLE DIAGNOSIS FOR SYMPTOMS

8. 

DETECT MALFUNCTIONING ITEM

●

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

AT-60,

"Symptom Chart"

 .

OK or NG

OK

>> GO TO 9.

NG

>> Repair or replace damaged parts.

9. 

CHECK SYMPTOM

Check again.

OK or NG

OK

>> INSPECTION END

NG

>> GO TO 10.

10. 

PERFORM TCM INSPECTION

1.

Perform TCM input/output signal inspection.

2.

If NG, recheck TCM pin 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-60,

"Symptom Chart"

 .

OK or NG

OK

>> GO TO 9.

NG

>> Repair or replace damaged parts.

A/T Does Not Perform Lock-up

ECS0089J

SYMPTOM:

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

DIAGNOSTIC PROCEDURE

1. 

CHECK SELF-DIAGNOSTIC RESULTS

Execute self-diagnosis.

Do the self-diagnostic results indicate torque converter clutch solenoid valve, engine speed signal, turbine rev-
olution sensor, accelerator pedal position sensor, CAN communication?

YES

>> Check the malfunctioning system. Refer to 

AT-117, "DTC P0740 TORQUE CONVERTER

CLUTCH SOLENOID VALVE"

 , 

AT-115, "DTC P0725 ENGINE SPEED SIGNAL"

 , 

AT-152, "DTC

P1716 TURBINE REVOLUTION SENSOR"

 , 

AT-144, "DTC P1705 THROTTLE POSITION SEN-

SOR"

 , 

AT-99, "DTC U1000 CAN COMMUNICATION LINE"

 .

NO

>> GO TO 2.

TROUBLE DIAGNOSIS FOR SYMPTOMS

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2. 

CHECK A/T FLUID LEVEL

Check A/T fluid level again. Refer to 

AT-14, "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-52, "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.

Control valve assembly. Refer to 

AT-289, "Control Valve Assembly"

 .

2.

Disassemble A/T. Refer to 

AT-307, "DISASSEMBLY"

 .

3.

Check the following items:

–

Oil pump assembly. Refer to 

AT-321, "Oil Pump"

 .

OK or NG

OK

>> GO TO 6.

NG

>> Repair or replace damaged parts.

5. 

DETECT MALFUNCTIONING ITEM

1.

Control valve assembly. Refer to 

AT-289, "Control Valve Assembly"

 .

2.

Disassemble A/T. Refer to 

AT-307, "DISASSEMBLY"

 .

3.

Check the following items:

–

Oil pump assembly. Refer to 

AT-321, "Oil Pump"

 .

–

Power train system. Refer to 

AT-307, "DISASSEMBLY"

 .

–

Transmission case. Refer to 

AT-307, "DISASSEMBLY"

 .

OK or NG

OK

>> GO TO 6.

NG

>> Repair or replace damaged parts.

SAT638A

SAT494G

AT-264

TROUBLE DIAGNOSIS FOR SYMPTOMS

6. 

CHECK A/T FLUID CONDITION

1.

Remove oil pan. Refer to 

AT-289, "Control Valve Assembly"

 .

2.

Check A/T fluid condition.

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-60,

"Symptom Chart"

 .

OK or NG

OK

>> GO TO 8.

NG

>> Repair or replace damaged parts.

8. 

CHECK SYMPTOM

Check again.
OK or NG

OK

>> INSPECTION END

NG

>> GO TO 9.

9. 

PERFORM TCM INSPECTION

1.

Perform TCM input/output signal inspection.

2.

If NG, recheck TCM pin 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-60,

"Symptom Chart"

 .

OK or NG

OK

>> GO TO 8.

NG

>> Repair or replace damaged parts.

SAT171B