Infiniti F50. Manual — part 93
TROUBLE DIAGNOSIS FOR SYMPTOMS
AT-257
D
E
F
G
H
I
J
K
L
M
A
B
AT
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.
8.
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.
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
OK or NG
OK
>> GO TO 9.
NG
>> Repair or replace damaged parts.
SAT171B
AT-258
TROUBLE DIAGNOSIS FOR SYMPTOMS
A/T Does Not Shift: D
3
→
D
4
ECS0089H
SYMPTOM:
●
The vehicle does not shift-up from the D
3
to D
4
gear at the specified speed.
●
The vehicle does not shift-up from the D
3
to D
4
gear unless A/T is warmed up.
DIAGNOSTIC PROCEDURE
1.
CONFIRM THE SYMPTOM
Check if vehicle creeps forward in “D” position” and vehicle can be started from D
1.
OK or NG
OK
>> GO TO 2.
NG
>> Refer to
AT-247, "Vehicle Does Not Creep Forward In “D” Position"
,
2.
CHECK SELF-DIAGNOSTIC RESULTS
Execute self-diagnosis.
Do the self-diagnostic results indicate ATF pressure switch 1, ATF pressure switch 3, front brake solenoid
valve, input clutch solenoid valve, 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-219, "DTC P1841 ATF PRESSURE SWITCH 1"
AT-223, "DTC P1843 ATF PRESSURE SWITCH 3"
AT-170, "DTC P1752 INPUT CLUTCH
AT-179, "DTC P1757 FRONT BRAKE SOLENOID VALVE"
,
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 LEVEL
Check A/T fluid level again. Refer to
.
OK or NG
OK
>> GO TO 4.
NG
>> Refill ATF.
4.
CHECK LINE PRESSURE
Check line pressure at the engine stall point. Refer to
OK or NG
OK
>> GO TO 7.
NG - 1 >> Line pressure high. GO TO 5.
NG - 2 >> Line pressure low. GO TO 6.
SAT638A
SAT494G
TROUBLE DIAGNOSIS FOR SYMPTOMS
AT-259
D
E
F
G
H
I
J
K
L
M
A
B
AT
5.
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 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
.
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.
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.
8.
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.
9.
CHECK SYMPTOM
Check again.
OK or NG
OK
>> INSPECTION END
NG
>> GO TO 10.
SAT171B
AT-260
TROUBLE DIAGNOSIS FOR SYMPTOMS
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
OK or NG
OK
>> GO TO 9.
NG
>> Repair or replace damaged parts.
A/T Does Not Shift: D
4
→
D
5
ECS0089I
SYMPTOM:
●
The vehicle does not shift-up from the D
4
to D
5
gear at the specified speed.
●
The vehicle does not shift-up from the D
4
to D
5
gear unless A/T is warmed up.
DIAGNOSTIC PROCEDURE
1.
CONFIRM THE SYMPTOM
Check if vehicle creeps forward in “D” position” and vehicle can be started from D
1.
OK or NG
OK
>> GO TO 2.
NG
AT-247, "Vehicle Does Not Creep Forward In “D” Position"
2.
CHECK SELF-DIAGNOSTIC RESULTS
Execute self-diagnosis.
Do the self-diagnostic results indicate ATF pressure switch 1, ATF pressure switch 5, front brake solenoid
valve, direct clutch solenoid valve, accelerator pedal position sensor, turbine revolution sensor, vehicle speed
sensor A/T (revolution sensor) and vehicle speed sensor MTR?
YES
>> Check the malfunctioning system. Refer to
AT-219, "DTC P1841 ATF PRESSURE SWITCH 1"
AT-227, "DTC P1845 ATF PRESSURE SWITCH 5"
AT-179, "DTC P1757 FRONT BRAKE
AT-188, "DTC P1762 DIRECT CLUTCH SOLENOID VALVE"
"DTC P1705 THROTTLE POSITION SENSOR"
,
AT-152, "DTC P1716 TURBINE REVOLUTION
,
AT-110, "DTC P0720 VEHICLE SPEED SENSOR A/T (REVOLUTION SENSOR)"
,
AT-157, "DTC P1721 VEHICLE SPEED SENSOR MTR"
.
NO
>> GO TO 3.
3.
CHECK A/T FLUID LEVEL
Check A/T fluid level again. Refer to
.
OK or NG
OK
>> GO TO 4.
NG
>> Refill ATF.
SAT638A
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