o2 sensor NISSAN ALMERA 2001 User Guide

SAT007J
+Line pressure is increased to a maximum irrespective of the
throttle opening when fluid temperature drops to þ10ÉC (14ÉF).
This pressure rise is adopted to prevent a delay in clutch and
brake operation due to extreme drop of fluid viscosity at low
temperature.
SHIFT CONTROLNJAT0015S02The shift is regulated entirely by electronic control to accommodate
vehicle speed and varying engine operations. This is accomplished
by electrical signals transmitted by the revolution sensor and
throttle position sensor. This results in improved acceleration per-
formance and fuel economy.
SAT008J
Control of Shift Solenoid Valves A and BNJAT0015S0201The TCM activates shift solenoid valves A and B according to sig-
nals from the throttle position sensor and revolution sensor to
select the optimum gear position on the basis of the shift schedule
memorized in the TCM.
The shift solenoid valve performs simple ON-OFF operation. When
set to ªONº, the drain circuit closes and pilot pressure is applied to
the shift valve.
Relation Between Shift Solenoid Valves A and B and
Gear Positions
NJAT0015S0203
Shift solenoid valveGear position
D
1,21,11D2,22,12D3D4(OD) N-P
A ON (Closed) OFF (Open) OFF (Open) ON (Closed) ON (Closed)
B ON (Closed) ON (Closed) OFF (Open) OFF (Open) ON (Closed)
Control of Shift Valves A and BNJAT0015S0202
SAT009J
OVERALL SYSTEM
Control Mechanism (Cont'd)
AT-34

Pilot pressure generated by the operation of shift solenoid valves
A and B is applied to the end face of shift valves A and B.
The drawing above shows the operation of shift valve B. When the
shift solenoid valve is ªONº, pilot pressure applied to the end face
of the shift valve overcomes spring force, moving the valve upward.
LOCK-UP CONTROLNJAT0015S03The torque converter clutch piston in the torque converter is locked
to eliminate torque converter slip to increase power transmission
efficiency. The solenoid valve is controlled by an ON-OFF duty
signal sent from the TCM. The signal is converted to an oil pres-
sure signal which controls the torque converter clutch piston.
Conditions for Lock-up OperationNJAT0015S0301When vehicle is driven in 4th gear position, vehicle speed and
throttle opening are detected. If the detected values fall within the
lock-up zone memorized in the TCM, lock-up is performed.
Overdrive control switch ON OFF
Selector lever ªDº position
Gear position D
4D3
Vehicle speed sensor More than set value
Throttle position sensor Less than set opening
Closed throttle position switch OFF
A/T fluid temperature sensor More than 40ÉC (104ÉF)
SAT010J
Torque Converter Clutch Solenoid Valve ControlNJAT0015S0302The torque converter clutch solenoid valve is controlled by the
TCM. The plunger closes the drain circuit during the ªOFFº period,
and opens the circuit during the ªONº period. If the percentage of
OFF-time increases in one cycle, the pilot pressure drain time is
reduced and pilot pressure remains high.
The torque converter clutch piston is designed to slip to adjust the
ratio of ON-OFF, thereby reducing lock-up shock.
SAT011J
OFF-time INCREASING
¯
Amount of drain DECREASING
¯
Pilot pressure HIGH
¯
Lock-up RELEASING
OVERALL SYSTEM
Control Mechanism (Cont'd)
AT-35

CONSULT-IINJAT0022After performing ªSELF-DIAGNOSTIC PROCEDURE (WITH CON-
SULT-II)º (AT-39), place check marks for results on the ªDIAGNOS-
TIC WORKSHEETº, AT-71. Reference pages are provided follow-
ing the items.
NOTICE:
1) The CONSULT-II electrically displays shift timing and lock-up
timing (that is, operation timing of each solenoid).
Check for time difference between actual shift timing and the
CONSULT-II display. If the difference is noticeable, mechani-
cal parts (except solenoids, sensors, etc.) may be malfunction-
ing. Check mechanical parts using applicable diagnostic pro-
cedures.
2) Shift schedule (which implies gear position) displayed on
CONSULT-II and that indicated in Service Manual may differ
slightly. This occurs because of the following reasons:
+Actual shift schedule has more or less tolerance or allowance,
+Shift schedule indicated in Service Manual refers to the point
where shifts start, and
+Gear position displayed on CONSULT-II indicates the point
where shifts are completed.
3) Shift solenoid valve ªAº or ªBº is displayed on CONSULT-II at
the start of shifting. Gear position is displayed upon completion
of shifting (which is computed by TCM).
4) Additional CONSULT-II information can be found in the Opera-
tion Manual supplied with the CONSULT-II unit.
SAT580J
SELF-DIAGNOSTIC PROCEDURE (WITH CONSULT-II)NJAT0022S021. Turn on CONSULT-II and touch ªA/Tº for TCM self-diagnosis.
If A/T is not displayed, check TCM power supply and ground
circuit. Refer to AT-118. If result is NG, refer to EL-10, ªPOWER
SUPPLY ROUTINGº.
SAT970J
2. Touch ªSELF-DIAG RESULTSº.
Display shows malfunction experienced since the last erasing
operation.
CONSULT-II performs ªREAL TIME DIAGº.
Also, any malfunction detected while in this mode will be dis-
played at real time.
ON BOARD DIAGNOSTIC
SYSTEM DESCRIPTION
EXCEPT FOR EURO-OBD
CONSULT-II
AT-39

SELF-DIAGNOSTIC RESULT TEST MODENJAT0022S03
Detected items
(Screen terms for CONSULT-II, ªSELF-DIAG
RESULTSº test mode)Malfunction is detected when ... Remarks
Item Display
No failure
(NO SELF DIAGNOSTIC FAILURE INDICATED
FURTHER TESTING MAY BE REQUIRED**)+No failure has been detected.
Initial start+This is not a malfunction message (Whenever shut-
ting off a power supply to the TCM, this message
appears on the screen.) INITIAL START
Ð
Revolution sensor VHCL SPEED
SEN´A/T+TCM does not receive the proper voltage signal from
the sensor.
Vehicle speed sensor
(Meter)VHCL SPEED
SEN´MTR+TCM does not receive the proper voltage signal from
the sensor.
Throttle position sen-
sor
Throttle position switchTHROTTLE POSI
SEN+TCM receives an excessively low or high voltage
from the sensor.
Shift solenoid valve A SHIFT SOLENOID/V A+TCM detects an improper voltage drop when it tries
to operate the solenoid valve.
Shift solenoid valve B SHIFT SOLENOID/V B+TCM detects an improper voltage drop when it tries
to operate the solenoid valve.
Overrun clutch sole-
noid valveOVERRUN CLUTCH
S/V+TCM detects an improper voltage drop when it tries
to operate the solenoid valve.
T/C clutch solenoid
valveT/C CLUTCH SOL/V+TCM detects an improper voltage drop when it tries
to operate the solenoid valve.
A/T fluid temperature
sensorBATT/FLUID TEMP
SEN+TCM receives an excessively low or high voltage
from the sensor.To be displayed in
case of abnormality
and when no recording
is made.
Engine speed signal ENGINE SPEED SIG+TCM does not receive the proper voltage signal from
the ECM.
Line pressure solenoid
valveLINE PRESSURE S/V+TCM detects an improper voltage drop when it tries
to operate the solenoid valve.
TCM (RAM) CONTROL UNIT
(RAM)+TCM memory (RAM) is malfunctioning.
TCM (ROM) CONTROL UNIT
(ROM)+TCM memory (ROM) is malfunctioning.
TCM (EEP ROM) CONT UNIT (EEP
ROM)+TCM memory (EEP ROM) is malfunctioning.
DATA MONITOR MODE (A/T)NJAT0022S04
Item DisplayMonitor item
Description Remarks
ECU input
signalsMain sig-
nals
Vehicle speed sensor 1
(A/T)
(Revolution sensor)VHCL/S SE´A/T
[km/h] or [mph]
XÐ+Vehicle speed com-
puted from signal of
revolution sensor is dis-
played.When racing engine in ªNº
or ªPº position with vehicle
stationary, CONSULT-II
data may not indicate 0
km/h (0 mph).
ON BOARD DIAGNOSTIC
SYSTEM DESCRIPTION
EXCEPT FOR EURO-OBD
CONSULT-II (Cont'd)
AT-40

Item DisplayMonitor item
Description Remarks
ECU input
signalsMain sig-
nals
Vehicle speed sensor 2
(Meter)VHCL/S SE´MTR
[km/h] or [mph]
XÐ+Vehicle speed com-
puted from signal of
vehicle speed sensor is
displayed.Vehicle speed display may
not be accurate under
approx. 10 km/h (6 mph).
It may not indicate 0 km/h
(0 mph) when vehicle is
stationary.
Throttle position sensor THRTL POS SEN
[V] X Ð+Throttle position sensor
signal voltage is dis-
played.
A/T fluid temperature sen-
sorFLUID TEMP SE
[V]
XÐ+A/T fluid temperature
sensor signal voltage is
displayed.
+Signal voltage lowers as
fluid temperature rises.
Battery voltage BATTERY VOLT
[V]XÐ+Source voltage of TCM
is displayed.
Engine speed ENGINE SPEED
[rpm]
XX+Engine speed, com-
puted from engine
speed signal, is dis-
played.Engine speed display may
not be accurate under
approx. 800 rpm. It may
not indicate 0 rpm even
when engine is not run-
ning.
Overdrive control switch OVERDRIVE SW
[ON/OFF]
XÐ+ON/OFF state com-
puted from signal of
overdrive control SW is
displayed.
P/N position switch PN POSI SW
[ON/OFF]
XÐ+ON/OFF state com-
puted from signal of P/N
position SW is dis-
played.
R position switch R POSITION SW
[ON/OFF]
XÐ+ON/OFF state com-
puted from signal of R
position SW is dis-
played.
D position switch D POSITION SW
[ON/OFF]
XÐ+ON/OFF state com-
puted from signal of D
position SW is dis-
played.
2 position switch 2 POSITION SW
[ON/OFF]
XÐ+ON/OFF status, com-
puted from signal of 2
position SW, is dis-
played.
1 position switch 1 POSITION SW
[ON/OFF]
XÐ+ON/OFF status, com-
puted from signal of 1
position SW, is dis-
played.
ASCD cruise signal ASCD-CRUISE
[ON/OFF]
XÐ+Status of ASCD cruise
signal is displayed.
ON ... Cruising state
OFF ... Normal running
state+This is displayed even
when no ASCD is
mounted.
ON BOARD DIAGNOSTIC
SYSTEM DESCRIPTION
EXCEPT FOR EURO-OBD
CONSULT-II (Cont'd)
AT-41

6 CHECK SELF-DIAGNOSIS CODE
Check O/D OFF indicator lamp. Refer to JUDGEMENT OF SELF-DIAGNOSIS CODE, AT-47.
SAT123KA
©DIAGNOSIS END
JUDGEMENT OF SELF-DIAGNOSIS CODENJAT0230S02
O/D OFF indicator lamp:
All judgement flickers are the same.
SAT436F
All circuits that can be confirmed by self-diagnosis are OK.1st judgement flicker is longer than others.
SAT437F
Revolution sensor circuit is short-circuited or disconnected.
ÞGo to VEHICLE SPEED SENSOR´A/T (REVOLUTION SEN-
SOR).
General: AT-126
2nd judgement flicker is longer than others.
SAT439F
Vehicle speed sensor circuit is short-circuited or disconnected.
ÞGo to VEHICLE SPEED SENSOR´MTR.
General: AT-1313rd judgement flicker is longer than others.SAT441F
Throttle position sensor circuit is short-circuited or disconnected.
ÞGo to THROTTLE POSITION SENSOR.
General: AT-134
ON BOARD DIAGNOSTIC
SYSTEM DESCRIPTION
EXCEPT FOR EURO-OBD
Diagnostic Procedure Without CONSULT-II (Cont'd)
AT-47

O/D OFF indicator lamp:
4th judgement flicker is longer than others.
SAT443F
Shift solenoid valve A circuit is short-circuited or disconnected.
ÞGo to SHIFT SOLENOID VALVE A.
General: AT-1425th judgement flicker is longer than others.
SAT445F
Shift solenoid valve B circuit is short-circuited or disconnected.
ÞGo to SHIFT SOLENOID VALVE B.
General: AT-148
6th judgement flicker is longer than others.
SAT447F
Overrun clutch solenoid valve circuit is short-circuited or discon-
nected.
ÞGo to OVERRUN CLUTCH SOLENOID VALVE.
General: AT-1547th judgement flicker is longer than others.
SAT449F
Torque converter clutch solenoid valve circuit is short-circuited
or disconnected.
ÞGo to TORQUE CONVERTER CLUTCH SOLENOID
VA LV E .
General: AT-159
8th judgement flicker is longer than others.
SAT451F
A/T fluid temperature sensor is disconnected or TCM power
source circuit is damaged.
ÞGo to A/T FLUID TEMPERATURE SENSOR AND TCM
POWER SOURCE.
General: AT-1659th judgement flicker is longer than others.
SAT453F
Engine speed signal circuit is short-circuited or disconnected.
ÞGo to ENGINE SPEED SIGNAL.
General: AT-172
ON BOARD DIAGNOSTIC
SYSTEM DESCRIPTION
EXCEPT FOR EURO-OBD
Diagnostic Procedure Without CONSULT-II (Cont'd)
AT-48

IntroductionNJAT0251The A/T system has two self-diagnostic systems.
The first is the emission-related on board diagnostic system (EURO-OBD) performed by the TCM in combi-
nation with the ECM. The malfunction is indicated by the MI (malfunction indicator) and is stored as a DTC in
the ECM memory but not the TCM memory.
The second is the TCM original self-diagnosis indicated by the O/D OFF indicator lamp. The malfunction is
stored in the TCM memory. The detected items are overlapped with EURO-OBD self-diagnostic items. For
detail, refer to AT-55.
EURO-OBD Function for A/T SystemNJAT0252The ECM provides emission-related on board diagnostic (EURO-OBD) functions for the A/T system. One
function is to receive a signal from the TCM used with EURO-OBD-related parts of the A/T system. The sig-
nal is sent to the ECM when a malfunction occurs in the corresponding EURO-OBD-related part. The other
function is to indicate a diagnostic result by means of the MI (malfunction indicator) on the instrument panel.
Sensors, switches and solenoid valves are used as sensing elements.
The MI automatically illuminates in One or Two Trip Detection Logic when a malfunction is sensed in relation
to A/T system parts.
One or Two Trip Detection Logic of EURO-OBDNJAT0253ONE TRIP DETECTION LOGICNJAT0253S01If a malfunction is sensed during the first test drive, the MI will illuminate and the malfunction will be stored
in the ECM memory as a DTC. The TCM is not provided with such a memory function.
TWO TRIP DETECTION LOGICNJAT0253S02When a malfunction is sensed during the first test drive, it is stored in the ECM memory as a 1st trip DTC
(diagnostic trouble code) or 1st trip freeze frame data. At this point, the MI will not illuminate. Ð First Trip
If the same malfunction as that experienced during the first test drive is sensed during the second test drive,
the MI will illuminate. Ð Second Trip
A/T-related parts for which the MI illuminates during the first or second test drive are listed below.
ItemsMI
One trip detection Two trip detection
Shift solenoid valve A Ð DTC: P0750 X
Shift solenoid valve B Ð DTC: P0755 X
Throttle position sensor or switch Ð DTC: P1705 X
Except aboveX
The ªtripº in the ªOne or Two Trip Detection Logicº means a driving mode in which self-diagnosis is performed
during vehicle operation.
EURO-OBD Diagnostic Trouble Code (DTC)NJAT0254HOW TO READ DTC AND 1ST TRIP DTCNJAT0254S01DTC and 1st trip DTC can be read by the following methods.
(
with CONSULT-II orGST)CONSULT-II or GST (Generic Scan Tool) Examples: P0705, P0710, P0720,
P0725, etc.
These DTCs are prescribed by SAE J2012.
(CONSULT-II also displays the malfunctioning component or system.)
+1st trip DTC No. is the same as DTC No.
+Output of the diagnostic trouble code indicates that the indicated circuit has a malfunction.
However, in case of the Mode II and GST they do not indicate whether the malfunction is still
occurring or occurred in the past and returned to normal.
CONSULT-II can identify them as shown below. Therefore, using CONSULT-II (if available) is rec-
ommended.
A sample of CONSULT-II display for DTC is shown in the following page. DTC or 1st trip DTC of a malfunc-
tion is displayed in SELF DIAGNOSIS mode for ªENGINEº with CONSULT-II. Time data indicates how many
times the vehicle was driven after the last detection of a DTC.
ON BOARD DIAGNOSTIC SYSTEM
DESCRIPTION
EURO-OBD
Introduction
AT-50

SAT964I
Malfunction Indicator (MI)=NJAT02551. The malfunction indicator will light up when the ignition switch
is turned ON without the engine running. This is for checking
the lamp.
+If the malfunction indicator does not light up, refer to EL-185,
ªWarning Lampsº.
(Or see MI & CONSULT-II in EC section. Refer to EC-74,
ªDescriptionº, ªMalfunction Indicator (MI)º and EC-83, ªCON-
SULT-IIº.)
2. When the engine is started, the malfunction indicator should go
off.
If the lamp remains on, the on board diagnostic system has
detected an emission-related (EURO-OBD) malfunction. For
detail, refer to EC-59, ªON BOARD DIAGNOSTIC SYSTEM
DESCRIPTIONº.
CONSULT-IINJAT0256After performing ªSELF-DIAGNOSTIC PROCEDURE (WITH CON-
SULT-II)º (AT-55), place check marks for results on the ªDIAGNOS-
TIC WORKSHEETº, AT-76. Reference pages are provided follow-
ing the items.
NOTICE:
1) The CONSULT-II electrically displays shift timing and lock-up
timing (that is, operation timing of each solenoid).
Check for time difference between actual shift timing and the
CONSULT-II display. If the difference is noticeable, mechani-
cal parts (except solenoids, sensors, etc.) may be malfunction-
ing. Check mechanical parts using applicable diagnostic pro-
cedures.
2) Shift schedule (which implies gear position) displayed on
CONSULT-II and that indicated in Service Manual may differ
slightly. This occurs because of the following reasons:
+Actual shift schedule has more or less tolerance or allowance,
+Shift schedule indicated in Service Manual refers to the point
where shifts start, and
+Gear position displayed on CONSULT-II indicates the point
where shifts are completed.
3) Shift solenoid valve ªAº or ªBº is displayed on CONSULT-II at
the start of shifting. Gear position is displayed upon completion
of shifting (which is computed by TCM).
4) Additional CONSULT-II information can be found in the Opera-
tion Manual supplied with the CONSULT-II unit.
ON BOARD DIAGNOSTIC SYSTEM
DESCRIPTION
EURO-OBD
Malfunction Indicator (MI)
AT-54

SAT014K
SELF-DIAGNOSTIC PROCEDURE (WITH CONSULT-II)NJAT0256S011. Turn on CONSULT-II and touch ªENGINEº for EURO-OBD
detected items or touch ªA/Tº for TCM self-diagnosis.
If A/T is not displayed, check TCM power supply and ground
circuit. Refer to AT-118. If result is NG, refer to EL-10, ªPOWER
SUPPLY ROUTINGº.
SAT584J
2. Touch ªSELF DIAGNOSISº.
Display shows malfunction experienced since the last erasing
operation.
CONSULT-II performs ªreal time diagnosisº.
Also, any malfunction detected while in this mode will be dis-
played at real time.
SELF-DIAGNOSTIC RESULT TEST MODENJAT0256S02
Detected items
(Screen terms for CONSULT-II, ªSELF
DIAGNOSISº test mode)
Malfunction is detected when ...TCM self-diagnosis EURO-OBD (DTC)
Available by
O/D OFF
indicator lamp or
ªA/Tº on CONSULT-IIAvailable by
malfunction
indicator*2,
ªENGINEº on CON-
SULT-II or GST ªA/Tº ªENGINEº
PNP switch circuit+TCM does not receive the cor-
rect voltage signal (based on
the gear position) from the
switch.Ð P0705
ÐPNP SW/CIRC
Revolution sensor+TCM does not receive the
proper voltage signal from the
sensor.X P0720
VHCL SPEED
SEN´A/TVEH SPD SEN/CIR
AT
Vehicle speed sensor (Meter)+TCM does not receive the
proper voltage signal from the
sensor.XÐ
VHCL SPEED
SEN´MTRÐ
A/T 1st gear function+A/T cannot be shifted to the 1st
gear position even if electrical
circuit is good.Ð P0731*1
ÐA/T 1ST GR FNCTN
A/T 2nd gear function+A/T cannot be shifted to the 2nd
gear position even if electrical
circuit is good.Ð P0732*1
ÐA/T 2ND GR FNCTN
A/T 3rd gear function+A/T cannot be shifted to the 3rd
gear position even if electrical
circuit is good.Ð P0733*1
ÐA/T 3RD GR FNCTN
A/T 4th gear function+A/T cannot be shifted to the 4th
gear position even if electrical
circuit is good.Ð P0734*1
ÐA/T 4TH GR FNCTN
ON BOARD DIAGNOSTIC SYSTEM
DESCRIPTION
EURO-OBD
CONSULT-II (Cont'd)
AT-55