Infiniti QX4 (R50). Manual — part 34
SAT014K
SAT971J
SAT021J
DIAGNOSTIC TROUBLE CODE (DTC) CONFIRMATION
PROCEDURE
NBAT0045S01
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 “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 CONDITIONS:
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 “3RD GR FNCTN P0733” of “DTC WORK SUPPORT”
mode for “A/T” with CONSULT-II and touch “START”.
4)
Accelerate vehicle to 35 to 45 km/h (22 to 28 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 (OD “ON”)
I
Check that “GEAR” shows “4” after releasing pedal.
5)
Depress accelerator pedal steadily with 3.5/8 - 4.5/8 of
“THROTTLE POSI” from a speed of 35 to 45 km/h (22 to 28
MPH) until “TESTING” changes to “STOP VEHICLE” or “COM-
PLETED”. (It will take approximately 3 seconds.)
If the check result NG appears on CONSULT-II screen, go to
“DIAGNOSTIC PROCEDURE”, AT-136.
If “STOP VEHICLE” appears on CONSULT-II screen, go to
following step.
I
Check that “GEAR” shows “3” when depressing accelera-
tor pedal with 3.5/8 - 4.5/8 of “THROTTLE POSI”.
I
If “TESTING” does not appear on CONSULT-II for a long
time, select “SELF-DIAG RESULTS” for “ENGINE”. In case
a 1st trip DTC other than P0733 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 P0733 exists.
1
,
1
,
4
,
4
GI
MA
EM
LC
EC
FE
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P0733 IMPROPER SHIFTING TO 3RD GEAR POSITION
Description (Cont’d)
AT-133
8)
Make sure that “OK” is displayed. (If “NG” is displayed, refer
to “DIAGNOSTIC PROCEDURE”.) Refer to “DIAGNOSTIC
PROCEDURE”, AT-136.
Refer to shift schedule, AT-356.
With GST
Follow the procedure “With CONSULT-II”.
DTC P0733 IMPROPER SHIFTING TO 3RD GEAR POSITION
Description (Cont’d)
AT-134
Wiring Diagram — AT — 3RD
NBAT0192
MAT733A
GI
MA
EM
LC
EC
FE
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P0733 IMPROPER SHIFTING TO 3RD GEAR POSITION
Wiring Diagram — AT — 3RD
AT-135
Diagnostic Procedure
NBAT0046
1
CHECK SHIFT SOLENOID VALVE
1. Remove control valve assembly. Refer to AT-273.
2. Check shift solenoid valve operation.
I
Shift solenoid valve A
Refer to “Component Inspection”, AT-137.
SAT653I
OK or NG
OK
©
GO TO 2.
NG
©
Repair or replace shift solenoid valve assembly.
2
CHECK CONTROL VALVE
1. Disassemble control valve assembly.
Refer to “Control Valve Assembly”, AT-301.
2. Check to ensure that:
I
Valve, sleeve and plug slide along valve bore under their own weight.
I
Valve, sleeve and plug are free from burrs, dents and scratches.
I
Control valve springs are free from damage, deformation and fatigue.
I
Hydraulic line is free from obstacles.
SAT367H
OK or NG
OK
©
GO TO 3.
NG
©
Repair control valve assembly.
3
CHECK DTC
Perform Diagnostic Trouble Code (DTC) confirmation procedure, AT-133.
OK or NG
OK
©
INSPECTION END
NG
©
Check control valve again. Repair or replace control valve assembly.
DTC P0733 IMPROPER SHIFTING TO 3RD GEAR POSITION
Diagnostic Procedure
AT-136
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