Infiniti F50. Manual - part 89

TROUBLE DIAGNOSIS FOR SYMPTOMS

AT-241

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In “N” Position, Vehicle Moves

ECS0089A

SYMPTOM:

Vehicle moves forward or backward when selecting “N” position.

DIAGNOSTIC PROCEDURE

1. 

CHECK PNP SWITCH CIRCUIT

Execute self-diagnosis.
Do the self-diagnostic results indicate PNP switch?

Yes

>> Check the malfunctioning system. Refer to 

AT-105, "DTC P0705 PARK/NEUTRAL POSITION

SWITCH"

 .

No

>> GO TO 2.

2. 

CHECK CONTROL LINKAGE

Check the control linkage.

●

Refer to 

AT-282, "Checking of A/T Position"

 .

OK or NG

OK

>> GO TO 3.

NG

>> Adjust control linkage. Refer to 

AT-282, "Adjustment of

A/T Position"

 .

3. 

CHECK A/T FLUID LEVEL

Check A/T fluid level. Refer to 

AT-14, "Checking A/T Fluid"

 .

OK or NG

OK

>> GO TO 4.

NG

>> Refill ATF.

4. 

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 5.

NG

>> Check the malfunction items. If any items are damaged,

repair or replace damaged parts. Refer to 

AT-60, "Symp-

tom Chart"

 .

SCIA1612E

SAT638A

SAT171B

AT-242

TROUBLE DIAGNOSIS FOR SYMPTOMS

5. 

CHECK SYMPTOM

Check again.

OK or NG

OK

>> INSPECTION END

NG

>> GO TO 6.

6. 

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.

Large Shock (“N” to “D” Position)

ECS0089B

SYMPTOM:

A noticeable shock occurs when the selector lever is shifted from the “N” to “D” position.

DIAGNOSTIC PROCEDURE

1. 

CHECK SELF-DIAGNOSTIC RESULTS

Execute self-diagnosis.

Do the self-diagnostic results indicate A/T fluid temperature sensor, engine speed signal, accelerator pedal
position sensor, ATF pressure switch 1, front brake solenoid valve, CAN communication line?

Yes

>> Check the malfunctioning system. Refer to 

AT-146, "DTC P1710 A/T FLUID TEMPERATURE

SENSOR CIRCUIT"

 , 

AT-115, "DTC P0725 ENGINE SPEED SIGNAL"

 ., 

AT-144, "DTC P1705

THROTTLE POSITION SENSOR"

 , 

AT-219, "DTC P1841 ATF PRESSURE SWITCH 1"

 , 

AT-179,

"DTC P1757 FRONT BRAKE SOLENOID VALVE"AT-179, "DTC P1757 FRONT BRAKE SOLE-
NOID VALVE"

 , 

AT-99, "DTC U1000 CAN COMMUNICATION LINE"

 .

No

>> GO TO 2.

2. 

ENGINE IDLE SPEED

Check the engine idle speed. Refer to 

EC-34, "Idle Speed and Ignition Timing Check"

 .

OK or NG

OK

>> GO TO 3.

NG

>> Repair.

3. 

CHECK CONTROL LINKAGE

Check the control linkage.

●

Refer to 

AT-282, "Checking of A/T Position"

 .

OK or NG

OK

>> GO TO 4.

NG

>> Adjust control linkage. Refer to 

AT-282, "Adjustment of

A/T Position"

 .

SCIA1612E

TROUBLE DIAGNOSIS FOR SYMPTOMS

AT-243

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4. 

CHECK A/T FLUID LEVEL

Check the A/T fluid level again. Refer to 

AT-14, "Checking A/T Fluid"

.

OK or NG

OK

>> GO TO 5.

NG

>> Refill ATF.

5. 

CHECK LINE PRESSURE

Check line pressure at idle with selector lever in “D” position. Refer
to 

AT-52, "LINE PRESSURE TEST"

 .

OK or NG

OK

>> GO TO 8.

NG - 1 >> Line pressure high: GO TO 6.
NG - 2 >> Line pressure low: GO TO 7.

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"

 .

OK or NG

OK

>> GO TO 8.

NG

>> Repair or replace damaged parts.

7. 

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 8.

NG

>> Repair or replace damaged parts.

SAT638A

SAT494G

AT-244

TROUBLE DIAGNOSIS FOR SYMPTOMS

8. 

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 9.

NG

>> GO TO 12.

9. 

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 10.

NG

>> Repair or replace damaged parts.

10. 

CHECK SYMPTOM

Check again.
OK or NG

OK

>> INSPECTION END

NG

>> GO TO 11.

11. 

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.

12. 

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 10.

NG

>> Repair or replace damaged parts.

SAT171B