Infiniti M45 (Y34). Manual — part 100
TROUBLE DIAGNOSIS FOR SYMPTOMS
AT-285
D
E
F
G
H
I
J
K
L
M
A
B
AT
10.
CHECK TCM
1.
Check TCM input/output signal. Refer to
AT-86, "TCM Input/Output Signal Reference Values"
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
OK or NG
OK
>> GO TO 9.
NG
>> Repair or replace damaged parts.
AT-286
TROUBLE DIAGNOSIS FOR SYMPTOMS
A/T Does Not Perform Lock-up
ACS001G2
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 line?
YES
>> Check the malfunctioning system. Refer to
AT-123, "DTC P0740 TORQUE CONVERTER
AT-121, "DTC P0725 ENGINE SPEED SIGNAL"
P1716 TURBINE REVOLUTION SENSOR"
,
AT-152, "DTC P1705 THROTTLE POSITION SEN-
AT-103, "DTC U1000 CAN COMMUNICATION LINE"
NO
>> GO TO 2.
2.
CHECK A/T FLUID LEVEL
Check A/T fluid level. Refer to
OK or NG
OK
>> GO TO 3.
NG
>> Refill ATF.
3.
CHECK LINE PRESSURE
Check line pressure at the engine stall point. Refer to
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.
Check control valve assembly. Refer to
AT-312, "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 7.
NG
>> Repair or replace damaged parts.
SAT638A
SAT494G
TROUBLE DIAGNOSIS FOR SYMPTOMS
AT-287
D
E
F
G
H
I
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K
L
M
A
B
AT
5.
DETECT MALFUNCTIONING ITEM
1.
Check control valve assembly. Refer to
AT-312, "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 7.
NG
>> Repair or replace damaged parts.
6.
CHECK A/T FLUID CONDITION
1.
Remove oil pan. Refer to
AT-312, "Control Valve Assembly"
2.
Check A/T fluid condition. Refer to
.
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
OK or NG
OK
>> GO TO 8.
NG
>> Repair or replace damaged parts.
8.
CHECK SYMPTOM
Check again. Refer to
OK or NG
OK
>> INSPECTION END
NG
>> GO TO 9.
9.
CHECK TCM
1.
Check TCM input/output signal. Refer to
AT-86, "TCM Input/Output Signal Reference Values"
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
OK or NG
OK
>> GO TO 8.
NG
>> Repair or replace damaged parts.
SCIA5199E
AT-288
TROUBLE DIAGNOSIS FOR SYMPTOMS
A/T Does Not Hold Lock-up Condition
ACS001G3
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 line?
YES
>> Check the malfunctioning system. Refer to
AT-123, "DTC P0740 TORQUE CONVERTER
AT-121, "DTC P0725 ENGINE SPEED SIGNAL"
P1716 TURBINE REVOLUTION SENSOR"
,
AT-103, "DTC U1000 CAN COMMUNICATION
NO
>> GO TO 2.
2.
CHECK A/T FLUID LEVEL
Check A/T fluid level. 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-312, "Control Valve Assembly"
2.
Check A/T fluid condition. Refer to
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. Refer to
OK or NG
OK
>> INSPECTION END
NG
>> GO TO 6.
SAT638A
SCIA5199E
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