check engine NISSAN X-TRAIL 2003 Electronic Manual Online

TROUBLE DIAGNOSES FOR SYMPTOMS
AT-265
[EURO-OBD]
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6.CHECK THROTTLE POSITION SENSOR CIRCUIT (WITHOUT CONSULT-II)
Without CONSULT-II
1. Pefer to "SELF-DIAGNOSTIC PROCEDURE (Without CONSULT-II)",AT-273, "
Diagnostic Procedure
Without CONSULT-II"—Except for Euro-OBD/Refer to "TCM SELF-DIAGNOSTIC PROCEDURE (NO
TOOLS)",AT-51, "
TCM SELF-DIAGNOSTIC PROCEDURE (NO TOOLS)"—Euro-OBD
2. Turn ignition switch to "ON" position.
(Do not start engine.)
3. Check voltage between TCM terminals 41 and ground while
depressing, and releasing accelerator pedal slowly. (After warm-
ingupengine)
OK or NG
OK >> GOTO7
NG >> Check the following items:
lThrottle position sensor — Refer to “Component Inspection”,AT-265, "COMPONENT INSPEC-
TION".
lHarness for short or open between ignition switch and throttle position sensor (Main harness)
lHarness for short or open between throttle position sensor and TCM (Main harness)
7.CHECK DTC
Perform “DIAGNOSTIC PROCEDURE”,AT-261, "
DIAGNOSTIC PROCEDURE".
OK or NG
OK >>INSPECTION END
NG >>
lPerform TCM input/output signal inspection.
lIf NG, recheck TCM pin terminals for damage or loose connection with harness connector.
COMPONENT INSPECTION
Overdrive Control Switch
lCheck continuity between two terminals 7 and 8.
SCIA0710E
Switch position Continuity
ON No
OFF Yes
SCIA0779E

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION
AT-273
[EXC.F/EURO-OBD]
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3. Touch “SELF-DIAG RESULTS”.
4. Touch “ERASE”. (The self-diagnostic results will be erased.)
Diagnostic Procedure Without CONSULT-IIECS004NX
SELF-DIAGNOSTIC PROCEDURE (WITHOUT CONSULT-II)
1.CHECK O/D OFF INDICATOR LAMP
1. Start engine and warm it up to normal operating temperature.
2. Turn ignition switch to “OFF” position.
Wait 5 seconds.
3. Turn ignition switch to “ACC” position.
4. Set overdrive control switch to “ON” position.
5. Move selector lever to “P” position.
6. Turn ignition switch to “ON” position. (Do not start engine.)
7. Does O/D OFF indicator lamp come on for about 2 seconds?
Ye s o r N o
Yes >>GOTO2
No >> Go toAT-354, "
1. O/D OFF Indicator Lamp Does Not
Come On".
SAT971J
SAT970J
SAT774B
SCIA0693E

TROUBLE DIAGNOSIS — INTRODUCTION
AT-279
[EXC.F/EURO-OBD]
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TROUBLE DIAGNOSIS — INTRODUCTIONPFP:00000
IntroductionECS004TF
The TCM receives a signal from the vehicle speed sensor, throttle
position sensor or PNP switch and provides shift control or lock-up
control via A/T 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 oper-
ating condition and be free of valve seizure, solenoid valve malfunc-
tion, 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 replace-
ment 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 “Work Flow”. Refer toAT-284, "
Work Flow".
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 “Diagnostic Worksheet” like the exam-
ple (AT-280, "
DIAGNOSTIC WORKSHEET") should be used.
Start your diagnosis by looking for “conventional” problems first. This
will help troubleshoot driveability problems on an electronically con-
trolled engine vehicle.
Also check related Service bulletins for information.
SAT631IA
SAT632I
SEF234G

TROUBLE DIAGNOSIS — INTRODUCTION
AT-281
[EXC.F/EURO-OBD]
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Diagnostic Worksheet
1.oRead the Fail-safe and listen to customer complaints.AT- 8 , "Wiring
Diagrams
and Trouble
Diagnosis",
AT- 2 8 0 ,
"DIAGNOS-
TIC WORK-
SHEET"
2.oCHECK A/T FLUIDAT- 2 8 6 , "A/T
Fluid Check"oLeakage (Follow specified procedure)
oFluid condition
oFluid level
3.oPerform STALL TEST and LINE PRESSURE TEST.AT- 2 8 7 , "
St a l l
Te s t",AT-
290, "Line
Pressure
Te s t"
oStall test — Mark possible damaged components/others.
oTorque converter one-way clutch
oReverse clutch
oForward clutch
oOverrun clutch
oForward one-way clutchoLow & reverse brake
oLow one-way clutch
oEngine
oLine pressure is low
oClutches and brakes except high clutch and
brake band are OK
oLine Pressure test — Suspected parts:

AT-282
[EXC.F/EURO-OBD]
TROUBLE DIAGNOSIS — INTRODUCTION
4.oPerform all ROAD TEST and mark required procedures.AT-291,
"Road Test"
4-
1.Check before engine is started.AT-292, "1.
CHECK
BEFORE
ENGINE IS
STARTED"
oSELF-DIAGNOSTIC CONFIRMATION PROCEDURE — Mark detected items.
oVehicle speed sensor·A/T (Revolution sensor),AT-392, "
VEHICLE SPEED SENSOR·A/T (REVO-
LUTION SENSOR)".
oVehicle speed sensor·MTR,AT- 3 9 7 , "
DTC VEHICLE SPEED SENSOR MTR".
oAccelerator pedal position (App) sensor,AT-401, "
ACCELE RATOR PEDAL POSITION (APP)
SENSOR".
oShift solenoid valve A,AT-406, "
SHIFT SOLENOID VALVE A".
oShift solenoid valve B,AT-4 11 , "
SHIFT SOLENOID VALVE B".
oOverrun clutch solenoid valve,AT-416, "
OVERRUNCLUTCHSOLENOIDVALVE".
oTorque converter clutch solenoid valve,AT- 4 2 1 , "
TORQUE CONVERTER CLUTCH SOLENOID
VA LV E".
oA/T fluid temperature sensor and TCM power source,AT-426, "
BATT/FLUID TEMP SEN (A/T
FLUID TEMP SENSOR CIRCUIT AND TCM POWER SOURCE)".
oEngine speed signal,AT-432, "
ENGINE SPEED SIGNAL".
oLine pressure solenoid valve,AT- 4 3 6 , "
LINE PRESSURE SOLENOID VALVE".
oCAN communication line,AT-4 4 3 , "
CAN CAMMUNICATION LINE".
oControl unit (RAM), control unit (ROM),AT- 2 2 6 , "
DTC CONTROL UNIT (RAM), CONTROL UNIT
(ROM)".
oControl unit (EEP ROM),AT-228, "
DTC CONTROL UNIT(EEPROM)".
oPNP & overdrive control switches, and throttle position sensor,AT- 3 8 2 , "
21. TCM Self-diagnosis
Does Not Activate (PNP & Overdrive Control Switches, and Throttle Position Sensor Circuit Checks)"
.
oBattery
oOthers
4-
2.Check at idleAT-293, "
2.
CHECK AT
IDLE"o1. O/D OFF Indicator Lamp Does Not Come On,AT-354, "1. O/D OFF Indicator Lamp Does Not Come
On".
o2. Engine Cannot Be Started In “P” And “N” Position,AT- 3 5 5 , "
2. Engine Cannot Be Started In“P”and“N”
Position".
o3. In “P” Position, Vehicle Moves Forward Or Backward When Pushed,AT- 3 5 6 , "
3. In“P”Position, Vehi-
cle Moves Forward Or Backward When Pushed".
o4. In “N” Position, Vehicle Moves,AT- 3 5 6 , "
4. In“N”Position, Vehicle Moves".
o5. Large Shock. “N”®“R” Position,AT-358, "
5. Large Shock.“N”®“R”Position".
o6. Vehicle Does Not Creep Backward In “R” Position,AT- 3 5 9 , "
6. Vehicle Does Not Creep Backward In
“R”Position".
o7. Vehicle Does Not Creep Forward In “D”, “2” Or “1” Position,AT- 3 6 2 , "
7. Vehicle Does Not Creep For-
ward In“D”,“2”Or“1”Position".

TROUBLE DIAGNOSIS — INTRODUCTION
AT-283
[EXC.F/EURO-OBD]
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4. 4-
3.Cruise testAT- 2 9 6 , "3.
CRUISE
TEST"
AT- 3 0 0 ,
"Cruise Test
—Part 1"
Part-1
o8. Vehicle Cannot Be Started From D
1,AT- 3 6 4 , "8. Vehicle Cannot Be Started From D1".
o9. A/T Does Not Shift: D
1®D2Or Does Not Kickdown: D4®D2,AT- 3 6 6 , "9. A/T Does Not Shift: D1
®D2Or Does Not Kickdown: D4®D2".
o10. A/T Does Not Shift: D
2®D3,AT-368, "10. A/T Does Not Shift: D2®D3".
o11. A/T Does Not Shift: D
3®D4,AT-371, "11.A/TDoesNotShift:D3®D4".
o12. A/T Does Not Perform Lock-up,AT- 3 7 4 , "
12. A/T Does Not Perform Lock-up".
o13. A/T Does Not Hold Lock-up Condition,AT- 3 7 5 , "
13. A/T Does Not Hold Lock-up Condition".
o14. Lock-up Is Not Released,AT- 3 7 6 , "
14. Lock-up Is Not Released".
o15. Engine Speed Does Not Return To Idle (Light Braking D
4®D3),AT-377, "15. Engine Speed Does
Not Return To Idle (Light Braking D4®D3)".
Part-2AT- 3 0 3 ,
"Cruise Test
—Part 2"o16. Vehicle Does Not Start From D1,AT- 3 7 9 , "16. Vehicle Does Not Start From D1".
o9. A/T Does Not Shift: D
1®D2Or Does Not Kickdown: D4®D2,AT- 3 6 6 , "9. A/T Does Not Shift: D1
®D2Or Does Not Kickdown: D4®D2".
o10. A/T Does Not Shift: D
2®D3,AT-368, "10. A/T Does Not Shift: D2®D3".
o11. A/T Does Not Shift: D
3®D4,AT-371, "11.A/TDoesNotShift:D3®D4".
Part-3AT- 3 0 5 ,
"Cruise Test
—Part 3"o17.A/TDoesNotShift:D4®D3When Overdrive Control Switch “ON”®“OFF”,AT-380, "17. A/T Does
Not Shift: D4®D3, When Overdrive Control Switch“ON”®“OFF”".
o15. Engine Speed Does Not Return To Idle (Engine Brake In D
3),AT-377, "15. Engine Speed Does Not
Return To Idle (Light Braking D4®D3)".
o18. A/T Does Not Shift: D
3®22, When Selector Lever “D”®“2” Position,AT-380, "18. A/T Does Not
Shift: D3®22, When Selector Lever“D”®“2”Position".
o15. Engine Speed Does Not Return To Idle (Engine Brake In 2
2),AT- 3 7 7 , "15. Engine Speed Does Not
Return To Idle (Light Braking D4®D3)".
o19. A/T Does Not Shift: 2
2®11, When Selector Lever “2”®“1” Position,AT-381, "19. A/T Does Not
Shift: 22®11, When Selector Lever“2”®“1”Position".
o20. Vehicle Does Not Decelerate By Engine Brake,AT- 3 8 1 , "
20. Vehicle Does Not Decelerate By Engine
Brake".
o21. TCM Self-diagnosis Does Not Activate (PNP & Overdrive Control Switches , and throttle position sen-
sor Circuit Checks),AT-382, "
21. TCM Self-diagnosis Does Not Activate (PNP & Overdrive Control
Switches, and Throttle Position Sensor Circuit Checks)".
oSELF-DIAGNOSTIC PROCEDURE — Mark detected items.
oVehicle speed sensor·A/T (Revolution sensor),AT- 3 9 2 , "
VEHICLE SPEED SENSOR·A/T (REVO-
LUTION SENSOR)".
oVehicle speed sensor·MTR,AT-397, "
DTC VEHICLE SPEED SENSOR MTR".
oAccelerator pedal position(APP) sensor,AT- 4 0 1 , "
ACCELE RATOR PEDAL POSITION (APP)
SENSOR".
oShift solenoid valve A,AT-406, "
SHIFT SOLENOID VALVE A".
oShift solenoid valve B,AT-4 11 , "
SHIFT SOLENOID VALVE B".
oOverrun clutch solenoid valve,AT- 4 1 6 , "
OVERRUNCLUTCHSOLENOIDVALVE".
oTorque converter clutch solenoid valve,AT-421, "
TORQUE CONVERTER CLUTCH SOLENOID
VA LV E".
oBatt/fluid temp sen (A/T fluid temperature sensor and TCM power source),AT-426, "
BATT/FLUID
TEMP SEN (A/T FLUID TEMP SENSOR CIRCUIT AND TCM POWER SOURCE)".
oEngine speed signal,AT- 4 3 2 , "
ENGINE SPEED SIGNAL".
oLine pressure solenoid valve,AT-436, "
LINE PRESSURE SOLENOID VALVE".
oCAN communication line,AT-443, "
CAN CAMMUNICATION LINE".
oControl unit (RAM), control unit (ROM),AT- 2 2 6 , "
DTC CONTROL UNIT (RAM), CONTROL UNIT
(ROM)".
oControl unit (EEP ROM),AT- 2 2 8 , "
DTC CONTROL UNIT(EEPROM)".
oPNP & overdrive control switches, and throttle position sensor,AT- 3 8 2 , "
21. TCM Self-diagnosis
Does Not Activate (PNP & Overdrive Control Switches, and Throttle Position Sensor Circuit Checks)"
.
oBattery
oOthers

AT-286
[EXC.F/EURO-OBD]
TROUBLE DIAGNOSIS — BASIC INSPECTION
TROUBLE DIAGNOSIS — BASIC INSPECTION
PFP:00000
A/T Fluid CheckECS004VR
FLUID LEAKAGE CHECK
1. Clean area suspected of leaking. — for example, mating surface
of converter housing and transmission case.
2. Start engine, apply foot brake, place selector lever in “D” posi-
tion and wait a few minutes.
3. Stop engine.
4. Check for fresh leakage.
FLUID CONDITION CHECK
FLUID LEVEL CHECK
Refer to “Checking A/T Fluid”,AT-13, "A/T FLUID".
SAT767B
SAT288G
Fluid color Suspected problem
Dark or black with burned odor Wear of frictional material
Milky pink Water contamination — Road water
entering through filler tube or breather
Varnished fluid, light to dark brown and
tackyOxidation — Over or under filling, —
Overheating
SAT638A

TROUBLE DIAGNOSIS — BASIC INSPECTION
AT-287
[EXC.F/EURO-OBD]
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Stall TestECS004VS
STALL TEST PROCEDURE
1. Check A/T fluid and engine oil levels. If necessary, add.
2. Drive vehicle for approx. 10 minutes or until fluid and oil reach
operating temperature.
3. Set parking brake and block wheels.
4. Install a tachometer where it can be seen by driver during test.
lIt is good practice to mark the point of specified engine
rpm on indicator.
5. Start engine, apply foot brake, and place selector lever in D
position.
6. Accelerate to wide open throttle gradually while applying foot
brake.
7. Quickly note the engine stall revolution and immediately release
throttle.
lDuring test, never hold throttle wide open for less than 5
seconds.
Stall revolution:
8. Move selector lever to “N” position.
9. Cool off ATF.
lRun engine at idle for at least one minute.
10. Repeat steps 5 through 9 with selector lever in “2”, “1” and “R”
positions.ATF operating temperature:
50 - 80°C (122 - 176°F)
SAT647B
SAT513G
SAT514G
QR20DE 2,450 - 2,950 rpm
SAT771B

AT-290
[EXC.F/EURO-OBD]
TROUBLE DIAGNOSIS — BASIC INSPECTION
Line Pressure Test
ECS004VT
LINE PRESSURE TEST PORTS
Location of line pressure test ports are shown in the illustration.
lAlways replace pressure plugs as they are self-sealing
bolts.
LINE PRESSURE TEST PROCEDURE
1. Check A/T fluid and engine oil levels. If necessary, add fluid or
oil.
2. Drive vehicle for approx. 10 minutes or until engine oil and ATF
reach operating temperature.
3. Install pressure gauge to corresponding line pressure port.
4. Set parking brake and block wheels.
lContinue to depress brake pedal fully while line pressure
test is being performed at stall speed.
SCIA0709E
ATF operating temperature: 50 - 80°C (122 -176°F)
SAT647B
UAT008
UAT008

TROUBLE DIAGNOSIS — BASIC INSPECTION
AT-291
[EXC.F/EURO-OBD]
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5. Start engine and measure line pressure at idle and stall speed.
lWhen measuring line pressure at stall speed, follow the
stall test procedure.
Line pressure: Refer toAT-563, "
SERVICE DATA AND SPECIFI-
CATIONS (SDS)".
JUDGEMENT OF LINE PRESSURE TEST
Road TestECS004VU
DESCRIPTION
lThe purpose of the test is to determine overall performance of A/
T and analyze causes of problems.
lThe road test consists of the following three parts:
1. Check before engine is started
2. Check at idle
SAT493G
Judgement Suspected parts
At idleLine pressure is low in all positions.
lOil pump wear
lControl piston damage
lPressure regulator valve or plug sticking
lSpring for pressure regulator valve damaged
lFluid pressure leakage between oil strainer and pressure regulator valve
lClogged strainer
Line pressure is low in particular posi-
tion.
lFluid pressure leakage between manual valve and particular clutch
lFor example, line pressure is:
-Low in “R” and “1” positions, but
-Normal in “D” and “2” positions.
Therefore, fluid leakage exists at or around low and reverse brake circuit.
Refer to “CLUTCH AND BAND CHART”,AT-19, "
CLUTCH AND BAND
CHART".
Line pressure is high.
lMaladjustment of throttle position sensor
lA/T fluid temperature sensor damaged
lLine pressure solenoid valve sticking
lShort circuit of line pressure solenoid valve circuit
lPressure modifier valve sticking
lPressure regulator valve or plug sticking
lOpen in dropping resistor circuit
At stall
speedLine pressure is low.
lMaladjustment of throttle position sensor
lLine pressure solenoid valve sticking
lShort circuit of line pressure solenoid valve circuit
lPressure regulator valve or plug sticking
lPressure modifier valve sticking
lPilot valve sticking
SAT786A