Infiniti G20 (P11). Manual — part 38
SAT014K
SAT971J
SAT021J
DIAGNOSTIC TROUBLE CODE (DTC) CONFIRMATION
PROCEDURE
NCAT0052S04
CAUTION:
I
Always drive vehicle at a safe speed.
I
If conducting this “DTC CONFIRMATION PROCEDURE”
again, always turn ignition switch “OFF” and wait at least
5 seconds before continuing.
I
Be careful not to rev engine into the red zone on the
tachometer.
NOTE:
If “DIAGNOSTIC TROUBLE CODE CONFIRMATION PROCE-
DURE” has been previously conducted, always turn ignition
switch “OFF” and wait at least 5 seconds before conducting
the next test.
TESTING CONDITION:
Always drive vehicle on a level road to improve the accuracy
of test.
After the repair, perform the following procedure to confirm the
malfunction is eliminated.
With CONSULT-II
1)
Start engine and select “DATA MONITOR” mode for “A/T” with
CONSULT-II.
2)
Make sure that output voltage of A/T fluid temperature sensor
is within the range below.
FLUID TEMP SEN: 0.4 - 1.5V
If out of range, drive the vehicle to decrease the voltage (warm
up the fluid) or stop engine to increase the voltage (cool down
the fluid).
3)
Select “4TH GR FNCTN P0734” of “DTC WORK SUPPORT”
mode for “A/T” with CONSULT-II and touch “START”.
4)
Accelerate vehicle to 50 to 60 km/h (31 to 37 MPH) under the
following condition and release the accelerator pedal com-
pletely.
THROTTLE POSI: Less than 5.5/8 (at all times during step
4)
Selector lever: D position (OD “ON”)
I
Check that “GEAR” shows “3” after releasing pedal.
5)
Depress accelerator pedal steadily with 1.0/8 - 2.0/8 of
“THROTTLE POSI” from a speed of 50 to 60 km/h (31 to 37
MPH) until “TESTING” has turned to “STOP VEHICLE” or
“COMPLETED”. (It will take approximately 3 seconds.)
If the check result NG appears on CONSULT-II screen, go to
“DIAGNOSTIC PROCEDURE”, AT-152.
If “STOP VEHICLE” appears on CONSULT-II screen, go to
following step.
I
Check that “GEAR” shows “4” when depressing accelera-
tor pedal with 1.0/8 - 2.0/8 of “THROTTLE POSI”.
I
If “TESTING” does not appear on CONSULT-II for a long
time, select “SELF-DIAGNOSIS” for “ENGINE”. In case a
1st trip DTC other than P0734 is shown, refer to applicable
“TROUBLE DIAGNOSIS FOR DTC”.
6)
Stop vehicle.
7)
Follow the instruction displayed. (Check for normal shifting
referring to the table below.)
GI
MA
EM
LC
EC
FE
CL
MT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P0734 A/T 4TH GEAR FUNCTION
Description (Cont’d)
AT-149
Vehicle condition
Gear on actual transmission shift pattern when
screen is changed to 1
,
2
,
3
,
4
No malfunction exists
1
,
2
,
3
,
4
Malfunction for P0734 exists.
1
,
2
,
2
,
1
8)
Make sure that “OK” is displayed. (If “NG” is displayed, refer
to “DIAGNOSTIC PROCEDURE”.)
Refer to “DIAGNOSTIC PROCEDURE”, AT-152.
Refer to shift schedule, AT-389.
With GST
Follow the procedure “With CONSULT-II”.
DTC P0734 A/T 4TH GEAR FUNCTION
Description (Cont’d)
AT-150
Wiring Diagram — AT — 4TH
NCAT0206
TAT230
GI
MA
EM
LC
EC
FE
CL
MT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P0734 A/T 4TH GEAR FUNCTION
Wiring Diagram — AT — 4TH
AT-151
Diagnostic Procedure
NCAT0053
1
CHECK SHIFT UP (D
3
TO D
4
)
During “Cruise test − Part 1” (AT-76), does A/T shift from D
3
to D
4
at the specified speed?
SAT988H
Yes or No
Yes
©
GO TO 9.
No
©
GO TO 2.
2
CHECK LINE PRESSURE
Perform line pressure test.
Refer to AT-66.
MTBL0388
OK or NG
OK
©
GO TO 3.
NG
©
GO TO 6.
DTC P0734 A/T 4TH GEAR FUNCTION
Diagnostic Procedure
AT-152
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