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

AT-263

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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