Infiniti F50. Manual — part 95
TROUBLE DIAGNOSIS FOR SYMPTOMS
AT-265
D
E
F
G
H
I
J
K
L
M
A
B
AT
A/T Does Not Hold Lock-up Condition
ECS0089K
SYMPTOM:
The lock-up condition cannot be maintained for more than 30 seconds.
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, CAN communication?
YES
>> Check the malfunctioning system. Refer to
AT-117, "DTC P0740 TORQUE CONVERTER
AT-115, "DTC P0725 ENGINE SPEED SIGNAL"
P1716 TURBINE REVOLUTION SENSOR"
AT-99, "DTC U1000 CAN COMMUNICATION LINE"
.
NO
>> GO TO 2.
2.
CHECK A/T FLUID LEVEL
Check A/T fluid level again. Refer to
OK or NG
OK
>> GO TO 3.
NG
>> Refill ATF.
3.
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 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
OK or NG
OK
>> GO TO 5.
NG
>> Repair or replace damaged parts.
5.
CHECK SYMPTOM
Check again.
OK or NG
OK
>> INSPECTION END
NG
>> GO TO 6.
SAT638A
SAT171B
AT-266
TROUBLE DIAGNOSIS FOR SYMPTOMS
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.
7.
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 5.
NG
>> Repair or replace damaged parts.
TROUBLE DIAGNOSIS FOR SYMPTOMS
AT-267
D
E
F
G
H
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K
L
M
A
B
AT
Lock-up Is Not Released
ECS0089L
SYMPTOM:
The lock-up condition cannot be cancelled even after releasing the accelerator pedal.
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, CAN communication?
YES
>> Check the malfunctioning system. Refer to
AT-117, "DTC P0740 TORQUE CONVERTER
AT-115, "DTC P0725 ENGINE SPEED SIGNAL"
P1716 TURBINE REVOLUTION SENSOR"
AT-99, "DTC U1000 CAN COMMUNICATION LINE"
.
NO
>> GO TO 2.
2.
CHECK SYMPTOM
Check again.
OK or NG
OK
>> INSPECTION END
NG
>> GO TO 3.
3.
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.
AT-268
TROUBLE DIAGNOSIS FOR SYMPTOMS
Engine Speed Does Not Return To Idle
ECS0089M
SYMPTOM:
When a shift-down is performed, the engine speed does not smoothly return to the idling speed.
DIAGNOSTIC PROCEDURE
1.
CHECK A/T FLUID LEVEL
Check A/T fluid level again. Refer to
.
OK or NG
OK
>> GO TO 2.
NG
>> Refill ATF.
2.
CHECK SELF-DIAGNOSTIC RESULTS
Execute self-diagnosis.
Do the self-diagnostic results indicate front brake solenoid valve, direct clutch solenoid valve, ATF pressure
switch 1, ATF pressure switch 5, accelerator pedal position sensor, vehicle speed sensor A/T (revolution sen-
sor) and vehicle speed sensor MTR?
YES
>> Check the malfunctioning system. Refer to
AT-179, "DTC P1757 FRONT BRAKE SOLENOID
AT-188, "DTC P1762 DIRECT CLUTCH SOLENOID VALVE"
,
AT-227, "DTC P1845 ATF PRESSURE SWITCH 5"
P1705 THROTTLE POSITION SENSOR"
AT-110, "DTC P0720 VEHICLE SPEED SENSOR A/T
,
AT-157, "DTC P1721 VEHICLE SPEED SENSOR MTR"
NO
>> GO TO 3.
3.
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 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
OK or NG
OK
>> GO TO 5.
NG
>> Repair or replace damaged parts.
5.
CHECK SYMPTOM
Check again.
OK or NG
OK
>> INSPECTION END
NG
>> GO TO 6.
SAT171B
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