NISSAN X-TRAIL 2003 Electronic Repair Manual

DTC P0731 A/T 1ST GEAR FUNCTION
AT-155
[EURO-OBD]
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Diagnostic ProcedureECS004RC
1.CHECK SHIFT SOLENOID VALVE
1. Remove control valve assembly. Refer toAT-454, "
Control Valve Assembly and Accumulators".
2. Check shift solenoid valve operation.
lShift solenoid valve A
lShift solenoid valve B
Refer to “Component Inspection”,AT- 1 5 6 , "
Component Inspection".
OK or NG
OK >> GOTO2
NG >> Repair or replace shift solenoid valve assembly.
2.CHECK CONTROL VALVE
1. Disassemble control valve assembly. Refer to “Control Valve Assembly”,AT-489, "
Control Valve Assem-
bly".
2. Check to ensure that:
lValve, sleeve and plug slide along valve bore under their own weight.
lValve, sleeve and plug are free from burrs, dents and scratches.
lControl valve springs are free from damage, deformation and fatigue.
lHydraulic line is free from obstacles.
OK or NG
OK >> GOTO3
NG >> Repair control valve assembly.
SCIA0755E
SAT367H

AT-156
[EURO-OBD]
DTC P0731 A/T 1ST GEAR FUNCTION
3.CHECK DTC
Perform Diagnostic Trouble Code (DTC) confirmation procedure,AT- 1 5 2 , "
DIAGNOSTIC TROUBLE CODE
(DTC) CONFIRMATION PROCEDURE".
OK or NG
OK >>INSPECTION END
NG >> Check control valve again. Repair or replace control valve assembly.
Component InspectionECS004RD
SHIFT SOLENOID VALVE A AND B
lFor removal, refer toAT-454, "REMOVAL".
Resistance Check
lCheck resistance between two terminals.
SCIA0756E
Solenoid valve Terminal No.Resistance
(Approx.)
Shift solenoid
valve A2
Ground20 - 30W
Shift solenoid
valve B15-20W

DTC P0731 A/T 1ST GEAR FUNCTION
AT-157
[EURO-OBD]
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Operation Check
lCheck solenoid valve by listening for its operating sound while
applying battery voltage to the terminal and ground.
SCIA0757E

AT-158
[EURO-OBD]
DTCP0732A/T2NDGEARFUNCTION
DTC P0732 A/T 2ND GEAR FUNCTION
PFP:31940
DescriptionECS004RE
lThis is an OBD-II self-diagnostic item and not available in TCM self-diagnosis.
lThis malfunction will not be detected while the O/D OFF indicator lamp is indicating another self-diagnosis
malfunction.
lThis malfunction is detected when the A/T does not shift into second gear position as instructed by the
TCM. This is not caused by electrical malfunction (circuits open or shorted) but by mechanical malfunction
such as control valve sticking, improper solenoid valve operation, etc.
TCM TERMINALS AND REFERENCE VALUE
Remarks: Specification data are reference values.
ON BOARD DIAGNOSTIC LOGIC
This diagnosis monitors actual gear position by checking the torque converter slip ratio calculated by TCM as
follows:
Torque converter slip ratio = A x C/B
A: Output shaft revolution signal from revolution sensor
B: Engine speed signal from ECM
C: Gear ratio determined as gear position which TCM supposes
If the actual gear position is higher than the position (2nd) supposed by TCM, the slip ratio will be more than
normal. In case the ratio exceeds the specified value, TCM judges this diagnosis malfunction.
This malfunction will be caused when shift solenoid valve B is stuck open.
*: P0732 is detected.Gear position 1 2 3 4
Shift solenoid valve A ON (Closed) OFF (Open) OFF (Open) ON (Closed)
Shift solenoid valve B ON (Closed) ON (Closed) OFF (Open) OFF (Open)
Te r m i -
nal No.Wire color Item ConditionJudgement stan-
dard
(Approx.)
12 L/YShift solenoid
valve BWhen shift solenoid valve B oper-
ates.
(When driving in “D
1”or“D2”.)Battery voltage
When shift solenoid valve B does not
operate.
(When driving in “D
3”or“D4”.)0V
Gear position supposed by TCM 1 2 3 4
In case of gear position with no malfunctions 1 2 3 4
In case of gear position with shift solenoid valve B stuck open 4 3* 3 4
Diagnostic trouble code Malfunction is detected when ... Check items (Possible cause)
:A/T2NDGRFNCTN
A/T cannot be shifted to the 2nd gear
position even if electrical circuit is good.
lShift solenoid valve B
lEach clutch
lHydraulic control circuit : P0732

DTC P0732 A/T 2ND GEAR FUNCTION
AT-159
[EURO-OBD]
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DIAGNOSTIC TROUBLE CODE (DTC) CONFIRMATION PROCEDURE
CAUTION:
lAlways drive vehicle at a safe speed.
lBe 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 mal-
function 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 “2ND GR FNCTN P0732” of “DTC WORK SUPPORT”
mode for “A/T” with CONSULT-II and touch “START”.
4. Accelerate vehicle to 35 to 40 km/h (22 to 25 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”)
lCheck that “GEAR” shows “3” or “4” after releasing pedal.
5. Depress accelerator pedal to WOT (more than 7.0/8 of “THROT-
TLE POSI”) quickly from a speed of 35 to 40 km/h (22 to 25
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-162,
"Diagnostic Procedure".
If “STOP VEHICLE” appears on CONSULT-II screen, go to following step.
lCheck that “GEAR” shows “2” when depressing accelerator pedal to WOT.
lIf “TESTING” does not appear on CONSULT-II for a long time, select “SELF-DIAGNOSIS” for
“ENGINE”. In case a 1st trip DTC other than P0732 is shown, refer to applicable “TROUBLE DIAG-
NOSIS FOR DTC”.
6. Stop vehicle.
7. Follow the instruction displayed. (Check for normal shifting referring to the table below.)
SAT014K
SAT971J
SAT021J

AT-160
[EURO-OBD]
DTCP0732A/T2NDGEARFUNCTION
8. Make sure that “OK” is displayed. (If “NG” is displayed, refer to “DIAGNOSTIC PROCEDURE”.)
Refer to “DIAGNOSTIC PROCEDURE”,AT - 1 6 2 , "
Diagnostic Procedure".
Refer to shift schedule,AT-563, "
Shift Schedule".
With GST
Follow the procedure “With CONSULT-II”.
Vehicle conditionGear on actual transmission shift pattern when
screen is changed to 1®2®3®4
No malfunction exists 1®2®3®4
Malfunction for P0732
exists.4®3®3®4

DTC P0732 A/T 2ND GEAR FUNCTION
AT-161
[EURO-OBD]
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Wiring Diagram — AT — 2NDECS004RF
TCWA0050E

AT-162
[EURO-OBD]
DTCP0732A/T2NDGEARFUNCTION
Diagnostic Procedure
ECS004RG
1.CHECK SHIFT SOLENOID VALVE
1. Remove control valve assembly. Refer toAT-454, "
REMOVAL".
2. Check shift solenoid valve operation.
lShift solenoid valve B
Refer to “Component Inspection”,AT-163, "
Component Inspection".
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-489, "
Control Valve Assem-
bly".
2. Check to ensure that:
lValve, sleeve and plug slide along valve bore under their own weight.
lValve, sleeve and plug are free from burrs, dents and scratches.
lControl valve springs are free from damage, deformation and fatigue.
lHydraulic line is free from obstacles.
OK or NG
OK >> GO TO 3
NG >> Repair control valve assembly.
SCIA0758E
SAT367H

DTC P0732 A/T 2ND GEAR FUNCTION
AT-163
[EURO-OBD]
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3.CHECK DTC
Perform Diagnostic Trouble Code (DTC) confirmation procedure,AT-159, "
DIAGNOSTIC TROUBLE CODE
(DTC) CONFIRMATION PROCEDURE".
OK or NG
OK >>INSPECTION END
NG >> Check control valve again. Repair or replace control valve assembly.
Component InspectionECS004RH
SHIFT SOLENOID VALVE B
lFor removal, refer toAT-454, "REMOVAL".
Resistance Check
lCheck resistance between two terminals.
SCIA0725E
Solenoid valve Terminal No.Resistance
(Approx.)
Shift solenoid
valve B1 Ground 5 - 20W

AT-164
[EURO-OBD]
DTCP0732A/T2NDGEARFUNCTION
Operation Check
lCheck solenoid valve by listening for its operating sound while
applying battery voltage to the terminal and ground.
SCIA0758E