Infiniti G20 (P11). Manual — part 63
11. A/T Does Not Shift: D
3
→
D
4
=NCAT0091
SYMPTOM:
I
A/T does not shift from D
3
to D
4
at the specified speed.
I
A/T must be warm before D
3
to D
4
shift will occur.
1
CHECK SYMPTOM
Are 7. Vehicle Does Not Creep Forward In “D”, “2” Or “1” Position and 8. Vehicle Cannot Be Started From D
1
OK?
Yes or No
Yes
©
GO TO 2.
No
©
Go to 7. Vehicle Does Not Creep Forward In “D”, “2” Or “1” Position and 8. Vehicle Can-
not Be Started From D
1
2
CHECK SELF-DIAGNOSTIC RESULTS
With CONSULT-II
Does self-diagnosis, after cruise test, show damage to any of the following circuits?
I
PNP switch
I
Overdrive control switch
I
A/T fluid temperature sensor
I
Vehicle speed sensor·A/T (revolution sensor)
I
Shift solenoid valve A or B
I
Vehicle speed sensor·MTR
SAT363HC
Yes or No
Yes
©
Check damaged circuit. Refer to “DTC P0705, P0710, P0720, P0750, P0755 or VHCL
SPEED SEN·MTR”, AT-107, 113, 119, 181, or 215.
No
©
GO TO 3.
3
CHECK THROTTLE POSITION SENSOR
Check throttle position sensor. Refer to EC-177, “DTC P0120 THROTTLE POSITION SENSOR”.
SAT413J
OK or NG
OK
©
GO TO 4.
NG
©
Repair or replace throttle position sensor.
GI
MA
EM
LC
EC
FE
CL
MT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
TROUBLE DIAGNOSES FOR SYMPTOMS
11. A/T Does Not Shift: D
3
→
D
4
AT-249
4
CHECK A/T FLUID CONDITION
1. Remove oil pan.
2. Check A/T fluid condition.
SAT171B
OK or NG
OK
©
GO TO 5.
NG
©
GO TO 7.
5
DETECT MALFUNCTIONING ITEM
1. Remove control valve assembly. Refer to AT-280.
2. Check the following items:
I
Shift valve B
I
Overrun clutch control valve
I
Shift solenoid valve B
I
Pilot valve
I
Pilot filter
OK or NG
OK
©
GO TO 6.
NG
©
Repair or replace damaged parts.
6
CHECK SYMPTOM
Check again.
OK or NG
OK
©
INSPECTION END
NG
©
1. Perform TCM input/output signal inspection.
2. If NG, recheck TCM pin terminals for damage or loose connection with harness con-
nector.
TROUBLE DIAGNOSES FOR SYMPTOMS
11. A/T Does Not Shift: D
3
→
D
4
(Cont’d)
AT-250
7
DETECT MALFUNCTIONING ITEM
1. Remove control valve assembly. Refer to AT-280.
2. Check the following items:
I
Shift valve B
I
Overrun clutch control valve
I
Shift solenoid valve B
I
Pilot valve
I
Pilot filter
3. Disassemble A/T.
4. Check the following items:
I
Servo piston assembly
I
Brake band
I
Torque converter
I
Oil pump assembly
OK or NG
OK
©
GO TO 6.
NG
©
Repair or replace damaged parts.
GI
MA
EM
LC
EC
FE
CL
MT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
TROUBLE DIAGNOSES FOR SYMPTOMS
11. A/T Does Not Shift: D
3
→
D
4
(Cont’d)
AT-251
12. A/T Does Not Perform Lock-up
=NCAT0092
SYMPTOM:
A/T does not perform lock-up at the specified speed.
1
CHECK SELF-DIAGNOSTIC RESULTS
Does self-diagnosis show damage to torque converter clutch solenoid valve circuit after cruise test?
SAT346H
Yes or No
Yes
©
Check torque converter clutch solenoid valve circuit. Refer to “DTC P0740”, AT-157.
No
©
GO TO 2.
2
CHECK THROTTLE POSITION SENSOR
Check throttle position sensor. Refer to EC-177, “DTC P0120 THROTTLE POSITION SENSOR”.
SAT413J
OK or NG
OK
©
GO TO 3.
NG
©
Repair or replace throttle position sensor.
3
DETECT MALFUNCTIONING ITEM
1. Remove control valve. Refer to AT-280.
2. Check following items:
I
Torque converter clutch control valve
I
Torque converter relief valve
I
Torque converter clutch solenoid valve
I
Pilot valve
I
Pilot filter
OK or NG
OK
©
GO TO 4.
NG
©
Repair or replace damaged parts.
TROUBLE DIAGNOSES FOR SYMPTOMS
12. A/T Does Not Perform Lock-up
AT-252
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