2002 NISSAN TERRANO engine control

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

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

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

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

DIAGNOSTIC WORKSHEET
1.lRead the Fail-safe and listen to customer complaints. AT-5
2.lA/T FLUID CHECK AT-27
lLeakage (Follow specified procedure)
lFluid condition
lFluid level
3.lPerform STALL TEST and LINE PRESSURE TEST. AT-27,
AT-30
lStall test Ð Mark possible damaged components/others.
lTorque converter one-way clutch
lReverse clutch
lForward clutch
lOverrun clutch
lForward one-way clutchlLow & reverse brake
lLow one-way clutch
lEngine
lLine pressure is low
lClutches and brakes except high
clutch and brake band are OK
lLine pressure test Ð Suspected parts:
4.lPerform all ROAD TEST and mark required procedures. AT-32
4-1. Check before engine is started. AT-33
lSELF-DIAGNOSTIC PROCEDURE Ð Mark detected items.
lVehicle speed sensor×A/T (Revolution sensor), AT-50.
lVehicle speed sensor×MTR, AT-54.
lThrottle (accelerator) position sensor, AT-60.
lShift solenoid valve A, AT-63.
lShift solenoid valve B, AT-66.
lOverrun clutch solenoid valve, AT-69.
lTorque converter clutch solenoid valve, AT-88.
lA/T fluid temperature sensor and TCM power source, AT-76.
lEngine speed signal, AT-80.
lLine pressure solenoid valve, AT-84.
lPark/neutral position, overdrive control, A/T check and throttle
(accelerator) position switches, AT-88.
lBattery
lOthers
4-2. Check at idle AT-35
l1. SPORT Indicator Lamp Does Not Come On, AT-92.
l2. SPORT or SNOW Indicator Lamp Does Not Come On, AT-95.
l3. O/D OFF Indicator Lamp Does Not Come On, AT-95.
l4. SPORT Indicator Lamp Does Not Come On, AT-96.
l5. Engine Cannot Be Started In ªPº And ªNº Position, AT-97.
l6. In ªPº Position, Vehicle Moves Forward Or Backward When Pushed, AT-97.
l7. In ªNº Position, Vehicle Moves, AT-98.
l8. Large Shock. ªNº,ªRº Position, AT-99.
l9. Vehicle Does Not Creep Backward In ªRº Position, AT-100.
l10. Vehicle Does Not Creep Forward In ªDº, ª2º Or ª1º Position, AT-101.
4-3. Cruise testAT-36,
AT-39
Part-1
l11. Vehicle Cannot Be Started From D
1, AT-102.
l12. A/T Does Not Shift: D
1,D2Or Does Not Kickdown: D4,D2, AT-103.
l13. A/T Does Not Shift: D
2,D3, AT-104.
l14. A/T Does Not Shift: D
3,D4, AT-105.
l15. A/T Does Not Perform Lock-up, AT-106.
l16. A/T Does Not Hold Lock-up Condition, AT-107.
l17. Lock-up Is Not Released, AT-107.
l18. Engine Speed Does Not Return To Idle (Light Braking D
4,D3), AT-108.
TROUBLE DIAGNOSIS Ð Introduction
Diagnostic Worksheet (Cont'd)
AT-24

4. Part-2
l19. Vehicle Does Not Start From D
1, AT-109.
l12. A/T Does Not Shift: D
1,D2Or Does Not Kickdown: D4,D2, AT-103.
l13. A/T Does Not Shift: D
2,D3, AT-104.
l14. A/T Does Not Shift: D
3,D4, AT-105.AT-41
Part-3
l20. A/T Does Not Shift: D
2,D1When Depressing Accelerator Pedal, AT-5.
l21. A/T Does Not Shift: D
4,D3When Overdrive Control Switch ªONº,
ªOFFº, AT-111.
l18. Engine Speed Does Not Return To Idle (Engine Brake In D
3), AT-108.
l22. A/T Does Not Shift: D
3,22, When Selector Lever ªDº,ª2º Position,
AT- 111 .
l18. Engine Speed Does Not Return To Idle (Engine Brake In 2
2), AT-108.
l23. A/T Does Not Shift: 2
2,11, When Selector Lever ª2º,ª1º Position,
AT-5.
l24. Vehicle Does Not Decelerate By Engine Brake, AT-112.
lSELF-DIAGNOSTIC PROCEDURE Ð Mark detected items.AT-42
lVehicle speed sensor×A/T (Revolution sensor), AT-50.
lVehicle speed sensor×MTR, AT-54.
lThrottle (accelerator) position sensor, AT-60.
lShift solenoid valve A, AT-63.
lShift solenoid valve B, AT-66.
lOverrun clutch solenoid valve, AT-69.
lTorque converter clutch solenoid valve, AT-69.
lA/T fluid temperature sensor and TCM power source, AT-76.
lEngine speed signal, AT-80.
lLine pressure solenoid valve, AT-84.
lPark/neutral position, overdrive control, A/T check and throttle
(accelerator) position switches, AT-88.
lBattery
lOthers
5.lFor self-diagnosis NG items, inspect each component. Repair or replace the
damaged parts.AT-14
6.lPerform all ROAD TEST and re-mark required procedures. AT-32
7.lPerform the Diagnostic Procedures for all remaining items marked NG. Repair or
replace the damaged parts.
Refer to the Symptom Chart when you perform the procedures. (The chart also
shows some other possible symptoms and the component inspection orders.)AT-46
AT-43
8.lErase self-diagnosis code from TCM memories. AT-19
TROUBLE DIAGNOSIS Ð Introduction
Diagnostic Worksheet (Cont'd)
AT-25

4. Set parking brake and block wheels.
IContinue to depress brake pedal fully while line pressure
test is being performed at stall speed.
5. Start engine and measure line pressure at idle and stall speed.
IWhen measuring line pressure at stall speed, follow the
stall test procedure.
Line pressure:
Refer to SDS, AT-196.
JUDGEMENT OF LINE PRESSURE TEST
Judgement Suspected parts
At idleLine pressure is low in all
positions.IOil pump wear
IControl piston damage
IPressure regulator valve or plug sticking
ISpring for pressure regulator valve damaged
IA/T fluid pressure leakage between oil strainer and pressure regulator valve
IClogged strainer
Line pressure is low in par-
ticular position.IFluid pressure leakage between manual valve and particular clutch
IFor example, line pressure is:
Ð Low in ªRº and ª1º positions,
Ð Normal in ªDº and ª2º positions.
Then, fluid leakage exists at or around low and reverse brake circuit.
Refer to ªCLUTCH AND BAND CHARTº, AT-11.
Line pressure is high.IMal-adjustment of throttle position sensor
IA/T fluid temperature sensor damaged
ILine pressure solenoid valve sticking
IShort circuit of line pressure solenoid valve circuit
IPressure modifier valve sticking
IPressure regulator valve or plug sticking
IOpen in dropping resistor circuit
At stall speedLine pressure is low.IMal-adjustment of throttle position sensor
ILine pressure solenoid valve sticking
IShort circuit of line pressure solenoid valve circuit
IPressure regulator valve or plug sticking
IPressure modifier valve sticking
IPilot valve sticking
SAT513G
SAT493G
TROUBLE DIAGNOSIS Ð Basic Inspection
Line Pressure Test (Cont'd)
AT-31

1. CHECK BEFORE ENGINE IS STARTED
1. Park vehicle on flat surface.
2. Turn ignition switch to ªOFFº position.
1. Set A/T mode switch to ªAUTOº posi-
tion.
2. Move selector lever to ªPº position.
3. Turn ignition switch to ªONº position.
(Do not start engine.)
4. 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.
Does SPORT indicator lamp flicker for
about 8 seconds?
No
EYe s
Perform self-diagnosis.
Refer to SELF-DIAGNO-
SIS PROCEDURE, AT-14.
1. Set A/T mode switch to ªSPORTº posi-
tion.
2. Does SPORT indicator lamp come on?
Ye s
ENo
Go to 2. SPORT or SNOW
(*) Indicator Lamp Does
Not Come On, AT-95.
Set overdrive control switch to ªOFFº posi-
tion.
Does O/D OFF indicator lamp come on?
Ye s
ENo
Go to 3. O/D OFF Indica-
tor Lamp Does Not Come
On, AT-95.
qA
(Go to next page.)
NAT309
SAT853E
NAT309
SAT857E
NAT232
H
H
H
H
H
H
TROUBLE DIAGNOSIS Ð Basic Inspection
Road Test (Cont'd)
AT-33