2002 NISSAN TERRANO Service Repair Manual

SELF-DIAGNOSTIC PROCEDURE (Without
CONSULT-II)
DIAGNOSIS START
1. Start engine and warm it up to normal
engine operating temperature.
2. Turn ignition switch to ªOFFº position.
Wait at least 5 seconds.
1. Set A/T mode switch to ªAUTOº posi-
tion.
2. Set overdrive control switch in ªONº
position.
3. Move selector lever to ªPº position.
4. Turn ignition switch to ªONº position.
(Do not start engine.)
5. Does SPORT indicator lamp come on
for about 2 seconds?
Ye s
ENo
Go to 1. SPORT Indicator
Lamp Does Not Come On,
AT-92.
1. Turn ignition switch to ªACCº position.
2. Move selector lever to ªDº position.
qA
NAT309
SAT879E
SAT244I
H
H
H
H
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION
Self-diagnosis (Cont'd)
AT-15

qA
1. Set overdrive control switch in ªOFFº
position.
2. Depress accelerator pedal fully and
release it.
3. Turn ignition switch ªONº.
(Do not start engine.)
1. Move selector lever to ª2º position.
2. Set overdrive control switch in ªONº
position.
1. Move selector lever to ª1º position.
2. Set overdrive control switch in ªOFFº
position.
Depress accelerator pedal fully and
release it.
Check SPORT indicator lamp.
Refer to JUDGEMENT OF SELF-
DIAGNOSIS CODE, AT-17.
DIAGNOSIS END
SAT881E
FAT245I
SAT246I
SAT981F
NAT309
H
H
H
H
H
H
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION
Self-diagnosis (Cont'd)
AT-16

JUDGEMENT OF SELF-DIAGNOSIS CODE
SPORT indicator lamps
All judgement flickers are same.
SAT819H
All circuits that can be confirmed by self-diagnosis are OK.
4th judgement flicker is longer than others.
SAT797H
Shift solenoid valve A circuit is short-circuited or discon-
nected.
Go to SHIFT SOLENOID VALVE A, AT-63.
1st judgement flicker is longer than others.
SAT794H
Revolution sensor circuit is short-circuited or disconnected.
Go to VEHICLE SPEED SENSOR×A/T (REVOLUTION
SENSOR), AT-50.
5th judgement flicker is longer than others.
SAT798H
Shift solenoid valve B circuit is short-circuited or discon-
nected.
Go to SHIFT SOLENOID VALVE B, AT-66.
2nd judgement flicker is longer than others.
SAT795HVehicle speed sensor circuit is short-circuited or discon-
nected.
Go to VEHICLE SPEED SENSOR×MTR, AT-54.
6th judgement flicker is longer than others.
SAT799H
Overrun clutch solenoid valve circuit is short-circuited or dis-
connected.
Go to OVERRUN CLUTCH SOLENOID VALVE, AT-69.
3rd judgement flicker is longer than others.
SAT796H
Throttle (accelerator) position sensor circuit is short-circuited
or disconnected.
Go to THROTTLE (ACCELERATOR) POSITION
SENSOR, AT-60.
7th judgement flicker is longer than others.
SAT800H
Torque converter clutch solenoid valve circuit is short-cir-
cuited or disconnected.
Go to TORQUE CONVERTER CLUTCH SOLENOID
VALVE, AT-72.
t1= 2.5 seconds t2= 2.0 seconds t3= 1.0 second
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION
Self-diagnosis (Cont'd)
AT-17

SPORT indicator lamps
8th judgement flicker is longer than others.
SAT801H
A/T fluid temperature sensor is disconnected or TCM power
source circuit is damaged.
Go to A/T FLUID TEMPERATURE SENSOR AND TCM
POWER SOURCE, AT-76.
Flickers as shown below.
SAT804H
Battery power is low.
Battery has been disconnected for a long time.
Battery is connected conversely.
(When reconnecting TCM connectors. Ð This is not a prob-
lem.)
9th judgement flicker is longer than others.
SAT802H
Engine speed signal circuit is short-circuited or disconnected.
Go to ENGINE SPEED SIGNAL, AT-80.
Does not come on.
SAT805H
Park/neutral position, overdrive control or throttle (accelera-
tor) position switches circuit is disconnected or TCM is dam-
aged.
Go to PARK/NEUTRAL POSITION, OVERDRIVE CON-
TROL AND THROTTLE (ACCELERATOR) POSITION
SWITCHES, AT-88.
10th judgement flicker is longer than others.
SAT803H
Line pressure solenoid valve circuit is short-circuited or dis-
connected.
Go to LINE PRESSURE SOLENOID VALVE, AT-84.
t4= 1.0 second
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION
Self-diagnosis (Cont'd)
AT-18

HOW TO ERASE SELF-DIAGNOSTIC RESULTS
(With CONSULT-II)
1. If the ignition switch stays ªONº after repair work, be sure to turn
ignition switch ªOFFº once. Wait for at least 5 seconds and then
turn it ªONº again.
2. Turn CONSULT-II ªONº, and touch ªA/Tº.
3. Touch ªSELF-DIAG RESULTSº.
4. Touch ªERASEº. (The self-diagnostic results will be erased.)
HOW TO ERASE SELF-DIAGNOSTIC RESULTS
(Without CONSULT-II)
1. If the ignition switch stays ªONº after repair work, be sure to turn
ignition switch ªOFFº once. Wait for at least 5 seconds and then
turn it ªONº again.
2. Perform ªSELF-DIAGNOSTIC PROCEDURE (Without CON-
SULT-II)º. Refer to AT-15.
3. Turn ignition switch ªOFFº. (The self-diagnostic results will be
erased.)
SAT014K
SEF949Y
SAT970J
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION
Self-diagnosis (Cont'd)
AT-19

Diagnosis by CONSULT-II
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, mechanical parts (except solenoids, sensors, etc.) may be malfunctioning. Check mechanical
parts using applicable diagnostic procedures.
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:
IActual shift schedule has more or less tolerance or allowance,
IShift schedule indicated in Service Manual refers to the point where shifts start. 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 Operation Manual supplied with the CONSULT-II
unit.
SELF-DIAGNOSTIC RESULT TEST MODE
Refer to AT-14.
DATA MONITOR DIAGNOSTIC TEST MODE
Item DisplayMonitor item
Description Remarks ECU
input
signalsMain
signals
Vehicle speed sensor 1
(A/T)
(Revolution sensor)VHCL/S SE×A/T
[km/h] or [mph]
XÐIVehicle speed computed from signal
of revolution sensor is displayed.When racing engine in ªNº or ªPº posi-
tion with vehicle stationary, CON-
SULT-II data may not indicate
0 km/h (0 MPH).
Vehicle speed sensor 2
(Meter)VHCL/S SE×MTR
[km/h] or [mph]
XÐIVehicle speed computed from signal
of vehicle speed sensor is dis-
played.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 (accelerator)
position sensorTHRTL POS SEN
[V]XÐIThrottle (accelerator) position sen-
sor signal voltage is displayed.
A/T fluid temperature
sensorFLUID TEMP SE
[V]
XÐIA/T fluid temperature sensor signal
voltage is displayed.
ISignal voltage lowers as fluid tem-
perature rises.
Battery voltage BATTERY VOLT
[V]XÐISource voltage of TCM is displayed.
Engine speed ENGINE SPEED
[rpm]
XXIEngine speed, computed from
engine speed signal, is displayed.Engine speed display may not be
accurate under approx. 800 rpm. It
may not indicate 0 rpm even when
engine is not running.
Overdrive control switch OVERDRIVE SW
[ON/OFF]XÐION/OFF state computed from signal
of overdrive control SW is displayed.
P/N position switch P/N POSI SW
[ON/OFF]XÐION/OFF state computed from signal
of P/N position SW is displayed.
R position switch R POSITION SW
[ON/OFF]XÐION/OFF state computed from signal
of R position SW is displayed.
D position switch D POSITION SW
[ON/OFF]XÐION/OFF state computed from signal
of D position SW is displayed.
2 position switch 2 POSITION SW
[ON/OFF]XÐION/OFF status, computed from sig-
nal of 2 position SW, is displayed.
1 position switch 1 POSITION SW
[ON/OFF]XÐION/OFF status, computed from sig-
nal of 1 position SW, is displayed.
ASCD-cruise signal ASCD×CRUISE
[ON/OFF]
XÐIStatus of ASCD cruise signal is dis-
played.
ON ... Cruising state
OFF ... Normal running stateIThis is displayed even when no
ASCD is mounted.
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION
AT-20

Item DisplayMonitor item
Description Remarks ECU
input
signalsMain
signals
ASCD-OD cut signal ASCD×OD CUT
[ON/OFF]
XÐIStatus of ASCD×OD release signal is
displayed.
ON ... OD released
OFF ... OD not releasedIThis is displayed even when no
ASCD is mounted.
Kickdown switch KICKDOWN SW
[ON/OFF]XÐION/OFF status, computed from sig-
nal of kickdown SW, is displayed.IThis is displayed even when no
kickdown switch is equipped.
A/T mode switch POWER SHIFT SW
[ON/OFF]XÐION/OFF state computed from signal
of SPORT shift SW is displayed.
Closed throttle position
switchCLOSED THL/SW
[ON/OFF] X ÐION/OFF status, computed from sig-
nal of closed throttle (accelerator)
position SW, is displayed.
Wide open throttle posi-
tion switchW/O THRL/P-SW
[ON/OFF] X ÐION/OFF status, computed from sig-
nal of wide open throttle (accelera-
tor) position SW, is displayed.
A/T mode switch HOLD SW
[ON/OFF]XÐION/OFF status, computed from sig-
nal of SNOW shift SW, is displayed.
Gear position GEAR
ÐXIGear position data used for compu-
tation by TCM, is displayed.
Selector lever position SLCT LVR POSI
ÐXISelector lever position data, used
for computation by TCM, is dis-
played.IA specific value used for control is
displayed if fail-safe is activated due
to error.
Vehicle speed VEHICLE SPEED
[km/h] or [mph]ÐXIVehicle speed data, used for com-
putation by TCM, is displayed.
Throttle (accelerator)
positionTHROTTLE POSI
[/8] Ð XIThrottle (accelerator) position data,
used for computation by TCM, is
displayed.IA specific value used for control is
displayed if fail-safe is activated due
to error.
Line pressure duty LINE PRES DTY
[%] Ð XIControl value of line pressure sole-
noid valve, computed by TCM from
each input signal, is displayed.
Torque converter clutch
solenoid valve dutyTCC S/V DUTY
[%]
ÐXIControl value of torque converter
clutch solenoid valve, computed by
TCM from each input signal, is dis-
played.
Shift solenoid valve A SHIFT S/V A
[ON/OFF] Ð XIControl value of shift solenoid valve
A, computed by TCM from each
input signal, is displayed.Control value of solenoid is displayed
even if solenoid circuit is discon-
nected.
The ªOFFº signal is displayed if sole-
noid circuit is shorted. Shift solenoid valve B SHIFT S/V B
[ON/OFF] Ð XIControl value of shift solenoid valve
B, computed by TCM from each
input signal, is displayed.
Overrun clutch solenoid
valveOVERRUN/C S/V
[ON/OFF] Ð XIControl value of overrun clutch sole-
noid valve computed by TCM from
each input signal is displayed.
Self-diagnosis display
lamp
(SPORT indicator lamp)SELF-D DP LMP
[ON/OFF] Ð XIControl status of SPORT indicator
lamp is displayed.
X: Applicable
Ð: Not applicable
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION
Diagnosis by CONSULT-II (Cont'd)
AT-21

Introduction
The TCM receives a signal from the vehicle-speed sensor, throttle
(accelerator) position sensor or park/neutral position switch and
provides shift control or lock-up control via solenoid valves.
Input and output signals must always be correct and stable in the
operation of the A/T system. The A/T system must be in good
operating condition and be free of valve seizure, solenoid valve
malfunction, etc.
It is much more difficult to diagnose a problem that occurs intermit-
tently rather than continuously. Most intermittent problems are
caused by poor electric connections or improper wiring. In this
case, careful checking of suspected circuits may help prevent the
replacement of good parts.
A visual check only may not find the cause of the problems. A road
test with CONSULT-II or a circuit tester connected should be per-
formed. Follow the ªWork Flowº. Refer to AT-26.
Before undertaking actual checks, take a few minutes to talk with
a customer who approaches with a driveability complaint. The cus-
tomer can supply good information about such problems, especially
intermittent ones. Find out what symptoms are present and under
what conditions they occur. A ªDiagnostic Worksheetº like the
example (AT-24) should be used.
Start your diagnosis by looking for ªconventionalº problems first.
This will help troubleshoot driveability problems on an electronically
controlled engine vehicle.
SAT631IA
SAT632I
SEF234G
TROUBLE DIAGNOSIS Ð Introduction
AT-22