2001 NISSAN ALMERA N16 Electronic Repair Manual

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Page 1385 of 2493

NISSAN ALMERA N16 2001 Electronic Repair Manual Wiring Diagram Ð AT Ð ENGSSNJAT0277
YAT234
DTC P0725 ENGINE SPEED SIGNALEURO-OBD
Wiring Diagram Ð AT Ð ENGSS
AT-199

Page 1386 of 2493

NISSAN ALMERA N16 2001 Electronic Repair Manual Diagnostic ProcedureNJAT0278
1 CHECK DTC WITH ECM
Perform diagnostic test mode II (self- diagnostic results) for engine control. Check ignition signal circuit condition.
OK or NG
OK (With CONSULT-II)�

Page 1387 of 2493

NISSAN ALMERA N16 2001 Electronic Repair Manual 3 CHECK INPUT SIGNAL (Without CONSULT-II)
Without CONSULT-II
1. Start engine.
2. Check voltage between TCM terminal 39 and ground.
Voltage (Idle speed):
Refer to EC-489, ªIdle Speed and Ignition Timi

Page 1388 of 2493

NISSAN ALMERA N16 2001 Electronic Repair Manual DescriptionNJAT0279+This is an OBD-II self-diagnostic item and not available in TCM
self-diagnosis.
+This malfunction will not be detected while the O/D OFF indi-
cator lamp is indicating another self

DescriptionNJAT0279+This is an OBD-II self-diagnostic item and not available in TCM
self-diagnosis.
+This malfunction will not be detected while the O/D OFF indi-
cator lamp is indicating another self-diagnosis malfunction.
+This malfunction is detected when the A/T does not shift into
first 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.
Gear position1234
Shift solenoid valve A ON (Closed) OFF (Open) OFF (Open) ON (Closed)
Shift solenoid valve B ON (Closed) ON (Closed) OFF (Open) OFF (Open)
TCM TERMINALS AND REFERENCE VALUENJAT0279S01Remarks: Specification data are reference values.
Terminal
No.Wire color Item ConditionJudgement stan-
dard
11 L/WShift solenoid
valve A
When shift solenoid valve A oper-
ates.
(When driving in ªD
1ºorªD4º.)Battery voltage
When shift solenoid valve A does
not operate.
(When driving in ªD
2ºorªD3º.)1V or less
12 L/YShift solenoid
valve BWhen shift solenoid valve B oper-
ates.
(When driving in ªD
1ºorªD2º.)Battery voltage
When shift solenoid valve B does
not operate.
(When driving in ªD
3ºorªD4º.)1V or less
ON BOARD DIAGNOSTIC LOGICNJAT0279S02This 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 (1st) supposed
by TCM, the slip ratio will be more than normal. In case the ratio
exceeds the specified value, TCM judges this diagnosis malfunc-
tion.
This malfunction will be caused when either shift solenoid valve A
is stuck open or shift solenoid valve B is stuck open.
Gear position supposed by TCM1234
In case of gear position with no malfunctions1234
In case of gear position with shift solenoid valve A stuck open 2* 2 3 3
In case of gear position with shift solenoid valve B stuck open 4* 3 3 4
*: P0731 is detected.
DTC P0731 A/T 1ST GEAR FUNCTIONEURO-OBD
Description
AT-202

Page 1389 of 2493

NISSAN ALMERA N16 2001 Electronic Repair Manual Diagnostic trouble code Malfunction is detected when ... Check items (Possible cause)
: A/T 1ST GR FNCTN
A/T cannot be shifted to the 1st gear
position even if electrical circuit is good.+Shift soleno

Diagnostic trouble code Malfunction is detected when ... Check items (Possible cause)
: A/T 1ST GR FNCTN
A/T cannot be shifted to the 1st gear
position even if electrical circuit is good.+Shift solenoid valve A
+Shift solenoid valve B
+Each clutch
+Hydraulic control circuit
: P0731
SAT014K
SAT971J
SAT021J
DIAGNOSTIC TROUBLE CODE (DTC) CONFIRMATION
PROCEDURE
NJAT0279S03CAUTION:
+Always drive vehicle at a safe speed.
+Be careful not to rev engine into the red zone on the
tachometer.
NOTE:
If ªDIAGNOSTIC TROUBLE CODE CONFIRMATION PROCE-
DUREº has been previously conducted, always turn ignition
switch ªOFFº 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 ªDATA MONITORº mode for ªA/Tº 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 ª1ST GR FNCTN P0731º of ªDTC WORK SUPPORTº
mode for ªA/Tº with CONSULT-II and touch ªSTARTº.
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 (OD ªONº)
+Check that ªGEARº shows ª2º after releasing pedal.
5) Depress accelerator pedal to WOT (more than 7.0/8 of
ªTHROTTLE POSIº) quickly from a speed of 20 to 25 km/h (12
to 16 MPH) until ªTESTINGº changes to ªSTOP VEHICLEº or
ªCOMPLETEDº. (It will take approximately 3 seconds.)
If the check result NG appears on CONSULT-II screen, go to
ªDIAGNOSTIC PROCEDUREº, AT-206.
If ªSTOP VEHICLEº appears on CONSULT-II screen, go to the
following step.
+Check that ªGEARº shows ª1º when depressing accelera-
tor pedal to WOT.
+If ªTESTINGº does not appear on CONSULT-II for a long
time, select ªSELF-DIAGNOSISº for ªENGINEº. In case a
DTC P0731 A/T 1ST GEAR FUNCTIONEURO-OBD
Description (Cont'd)
AT-203

Page 1390 of 2493

NISSAN ALMERA N16 2001 Electronic Repair Manual 1st trip DTC other than P0731 is shown, refer to applicable
ªTROUBLE DIAGNOSIS FOR DTCº.
6) Stop vehicle.
7) Follow the instruction displayed. (Check for normal shifting
referring to the table below

Page 1391 of 2493

NISSAN ALMERA N16 2001 Electronic Repair Manual Wiring Diagram Ð AT Ð 1STNJAT0280
YAT235
DTC P0731 A/T 1ST GEAR FUNCTIONEURO-OBD
Wiring Diagram Ð AT Ð 1ST
AT-205

Page 1392 of 2493

NISSAN ALMERA N16 2001 Electronic Repair Manual Diagnostic ProcedureNJAT0281
1 CHECK SHIFT SOLENOID VALVE
1. Remove control valve assembly. Refer to AT-343.
2. Check shift solenoid valve operation.
+Shift solenoid valve A
+Shift solenoid valve B
Re

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