Infiniti F50. Manual — part 89
TROUBLE DIAGNOSIS FOR SYMPTOMS
AT-241
D
E
F
G
H
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A
B
AT
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
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
3.
CHECK A/T FLUID LEVEL
Check A/T fluid level. Refer to
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
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
AT-115, "DTC P0725 ENGINE SPEED SIGNAL"
AT-219, "DTC P1841 ATF PRESSURE SWITCH 1"
"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
.
SCIA1612E
TROUBLE DIAGNOSIS FOR SYMPTOMS
AT-243
D
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F
G
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A
B
AT
4.
CHECK A/T FLUID LEVEL
Check the A/T fluid level again. Refer to
.
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
.
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
.
3.
Check the following items:
–
Oil pump assembly. Refer to
.
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
.
3.
Check the following items:
–
Oil pump assembly. Refer to
.
–
Power train system. Refer to
–
Transmission case. Refer to
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
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
OK or NG
OK
>> GO TO 10.
NG
>> Repair or replace damaged parts.
SAT171B
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