Infiniti I30 (A33). Manual — part 32
Possible Cause
NHAT0214
Check the following items.
I
Shift solenoid valve A
I
Shift solenoid valve B
I
Each clutch
I
Hydraulic control circuit
SAT014K
SAT971J
SAT021J
Diagnostic Trouble Code (DTC) Confirmation
Procedure
NHAT0215
CAUTION:
I
Always drive vehicle at a safe speed.
I
Be careful not to rev engine into the red zone on the
tachometer.
NOTE:
If “DTC Confirmation Procedure” 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
NHAT0215S01
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 “1ST GR FNCTN P0731” of “DTC WORK SUPPORT”
mode for “A/T” with CONSULT-II and touch “START”.
4)
Accelerate vehicle to 20 to 25 km/h (12 to 16 MPH) under the
following condition and release the accelerator pedal com-
pletely.
THROTTLE POSI: Less than 1.0/8 (at all times during step
4)
Selector lever: D position (O/D ON)
I
Check that “GEAR” shows “2” after releasing pedal.
5)
Depress accelerator pedal to WOT (more than 7.0/8 of
“THROTTLE POSI”) quickly from a speed of 20 to 25 km/h (12
to 16 MPH) until “TESTING” changes 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-128.
If “STOP VEHICLE” appears on CONSULT-II screen, go to the
following step.
I
Check that “GEAR” shows “1” when depressing accelera-
tor pedal to WOT.
I
If “TESTING” does not appear on CONSULT-II for a long
time, select “SELF-DIAG RESULTS” for “ENGINE”. In case
GI
MA
EM
LC
EC
FE
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P0731 A/T 1ST GEAR FUNCTION
Possible Cause
AT-125
a 1st trip DTC other than P0731 is shown, refer to appli-
cable “TROUBLE DIAGNOSIS FOR DTC”.
6)
Stop vehicle.
7)
Follow the instruction displayed. (Check for normal shifting
referring to the table below.)
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 P0731 exists.
2
,
2
,
3
,
3
4
,
3
,
3
,
4
8)
Make sure that “OK” is displayed. (If “NG” is displayed, refer
to “DIAGNOSTIC PROCEDURE”.)
Refer to “DIAGNOSTIC PROCEDURE”, AT-128.
Refer to shift schedule, AT-382.
WITH GST
NHAT0215S02
Follow the procedure “With CONSULT-II”.
DTC P0731 A/T 1ST GEAR FUNCTION
Diagnostic Trouble Code (DTC) Confirmation Procedure (Cont’d)
AT-126
Wiring Diagram — AT — 1ST
NHAT0047
MAT808A
SAT297K
GI
MA
EM
LC
EC
FE
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P0731 A/T 1ST GEAR FUNCTION
Wiring Diagram — AT — 1ST
AT-127
Diagnostic Procedure
NHAT0048
1
CHECK VALVE RESISTANCE
1. Remove control valve assembly. Refer to AT-280.
I
Shift solenoid valve A
I
Shift solenoid valve B
2. Check resistance between two terminals.
SAT043KA
OK or NG
OK
©
GO TO 2.
NG
©
Repair or replace damaged parts.
2
CHECK VALVE OPERATION
1. Remove control valve assembly. Refer to AT-280.
I
Shift solenoid valve A
I
Shift solenoid valve B
2. Check solenoid valve by listening for its operating sound while applying battery voltage to the terminal and ground.
SAT044K
OK or NG
OK
©
GO TO 3.
NG
©
Repair or replace shift solenoid valve assembly.
DTC P0731 A/T 1ST GEAR FUNCTION
Diagnostic Procedure
AT-128
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