2003 NISSAN X-TRAIL check engine

AT-68
[EURO-OBD]
TROUBLE DIAGNOSIS — BASIC INSPECTION
Line Pressure Test
ECS004QS
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-69
[EURO-OBD]
D
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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 TestECS004QT
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

AT-70
[EURO-OBD]
TROUBLE DIAGNOSIS — BASIC INSPECTION
3. Cruise test
lBefore road test, familiarize yourself with all test procedures and
items to check.
lConduct tests on all items until specified symptom is found.
Troubleshoot items which check out No Good after road test.
Refer to the following items.
1. CHECK BEFORE ENGINE IS STARTED
1.CHECK O/D OFF INDICATOR LAMP
1. Park vehicle on flat surface.
2. Turn ignition switch to “OFF” position.
3. Move selector lever to “P” position.
4. Set overdrive control switch to "ON" position.
5. Turn ignition switch to “ON” position. (Do not start engine.)
6. Does O/D OFF indicator lamp come on for about 2 seconds?
Ye s o r N o
Yes >>GOTO2
No >> Stop ROAD TEST. Go to “1. O/D OFF Indicator Lamp
Does Not Come On”,AT - 2 3 2 , "
1. O/D OFF Indicator
Lamp Does Not Come On".
ON BOARD DIAGNOSITC SYS-
TEM DESCRIPTIONTROUBLE DIAGNOSES FOR
SYMPTOMS
Except for
Euro-OBDAT- 2 6 7 , "
ON BOARD DIAG-
NOSTIC SYSTEM DESCRIP-
TION"toAT- 5 0 , "Diagnostic
Procedure Without CONSULT-
II"
AT- 2 3 2 , "1. O/D OFF Indicator
Lamp Does Not Come On"toAT-
260, "21. TCM Self-diagnosis
Does Not Activate (PNP & Over-
drive Control Switches, and
Throttle Position Sensor Circuit
Checks)"
EURO-OBDAT- 3 7 , "
ON BOARD DIAGNOS-
TIC SYSTEM DESCRIPTION"
toAT- 5 0 , "Diagnostic Procedure
Without CONSULT-II"
AT- 2 3 2 , "1. O/D OFF Indicator
Lamp Does Not Come On"toAT-
260, "21. TCM Self-diagnosis
Does Not Activate (PNP & Over-
drive Control Switches, and
Throttle Position Sensor Circuit
Checks)"
SAT496G
SAT774B
SCIA0693E

TROUBLE DIAGNOSIS — BASIC INSPECTION
AT-71
[EURO-OBD]
D
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2.CHECK O/D OFF INDICATOR LAMP
Does O/D OFF indicator lamp flicker for about 8 seconds?
Ye s o r N o
Yes (Except for Euro-OBD )>>Perform self-diagnosis and check
NG items on the DIAGNOSTIC WORKSHEET,AT-280,
"DIAGNOSTIC WORKSHEET". Refer toAT-273,
"SELF-DIAGNOSTIC PROCEDURE (WITHOUT CON-
SULT-II)".
No (Except for Euro-OBD)>>1.Turn ignition switch to “OFF” posi-
tion.
2. Perform self-diagnosis and note NG items.
Refer toAT-273, "
SELF-DIAGNOSTIC PROCEDURE
(WITHOUT CONSULT-II)".
3. Go to “2. CHECK AT IDLE”,AT-71, "
2. CHECK AT IDLE".
Yes (EURO-OBD)>>Perform self-diagnosis and check NG items on the DIAGNOSTIC WORKSHEET,AT-57,
"DIAGNOSTIC WORKSHEET". Refer toAT - 5 1 , "TCM SELF-DIAGNOSTIC PROCEDURE (NO
TOOLS)".
No (EURO-OBD)>>1.Turn ignition switch to “OFF” position.
2. Perform self-diagnosis and note NG items.
Refer toAT-51, "
TCM SELF-DIAGNOSTIC PROCEDURE (NO TOOLS)".
3. Go to “2. CHECK AT IDLE”,AT-71, "
2. CHECK AT IDLE".
2. CHECK AT IDLE
1.CHECK ENGINE START
1. Park vehicle on flat surface.
2. Turn ignition switch to “OFF” position.
3. Move selector lever to “P” or “N” position.
4. Turn ignition switch to “START” position.
5. Is engine started?
Ye s o r N o
Yes >>GOTO2
No >> Mark the box on the DIAGNOSTIC WORKSHEET.Go to
"2 Engine Cannot Be Started In “P” and “N” Position”,
AT-233, "
2. Engine Cannot Be Started In“P”and“N”
Position". Continue ROAD TEST.
2.CHECK ENGINE START
1. Turn ignition switch to “OFF” position.
2. Move selector lever to “D”, “1”, “2” or “R” position.
3. Turn ignition switch to “START” position.
4. Is engine started?
Ye s o r N o
Yes >> Mark the box on the DIAGNOSTIC WORKSHEET. Go
To "2. Engine Cannot Be Started In “P” and “N” Posi-
tion”,AT-233, "
2. Engine Cannot Be Started In“P”and
“N”Position". Continue ROAD TEST.
No >> GO TO 3
SCIA0693E
SAT769B
SAT770B

AT-72
[EURO-OBD]
TROUBLE DIAGNOSIS — BASIC INSPECTION
3.CHECK VEHICLE MOVE
1. Turn ignition switch to “OFF” position.
2. Move selector lever to “P” position.
3. Release parking brake.
4. Push vehicle forward or backward.
5. Does vehicle move when it is pushed forward or backward?
Ye s o r N o
Yes >> Mark the box on the DIAGNOSTIC WORKSHEET. Go
To "3. In “P” Position, Vehicle Moves Forward Or Back-
ward When Pushed”,AT-234, "
3. In“P”Position, Vehicle
Moves Forward Or Backward When Pushed". Continue
ROAD TEST.
No >> GO TO 4
4.CHECK VEHICLE MOVE
1. Apply parking brake.
2. Move selector lever to “N” position.
3. Turn ignition switch to “START” position and start engine.
4. Release parking brake.
5. Does vehicle move forward or backward?
Ye s o r N o
Yes >> Mark the box on the DIAGNOSTIC WORKSHEET. Go
To "4. In “N” Position, Vehicle Moves”,AT-234, "
4. In“N”
Position, Vehicle Moves". Continue ROAD TEST.
No >> GO TO 5
SAT768B
SAT796A
SAT771B

AT-78
[EURO-OBD]
TROUBLE DIAGNOSIS — BASIC INSPECTION
Cruise Test — Part 1
1.CHECKSTARTINGGEAR(D1) POSITION
1. Drive vehicle for approx. 10 minutes to warm engine oil and ATF up to operating
temperature.
2. Park vehicle on flat surface.
3. Set overdrive control switch to “ON” position.
4. Move selector lever to “P” position.
5. Start engine.
6. Move selector lever to “D” position.
7. Accelerate vehicle by constantly depressing accelerator pedal
halfway.
8. Does vehicle start from D
1?
Read gear position.
Ye s o r N o
Yes >>GOTO2
No >> Go To "8. Vehicle Cannot Be Started From D
1”,AT-242,
"8. Vehicle Cannot Be Started From D1". Continue
ROAD TEST. ATF operating temperature : 50 - 80°C (122 - 176°F)
SAT774B
SAT775B
SAT495G

AT-80
[EURO-OBD]
TROUBLE DIAGNOSIS — BASIC INSPECTION
5.CHECK LOCK-UP (D4TO D4L/U)
Does A/T perform lock-up at the specified speed?
Read vehicle speed, throttle position when lock-up duty becomes 94%.
Ye s o r N o
Yes >>GOTO6
No >> Go To "12. A/T Does Not Perform Lock-up”,AT-252, "
12.
A/T Does Not Perform Lock-up".ContinueROAD
TEST.
6.CHECK HOLD LOCK-UP
Does A/T hold lock-up condition for more than 30 seconds?
Ye s o r N o
Yes >>GOTO7
No >> Go To "13. A/T Does Not Hold Lock-up Condition”,AT-253, "
13. A/T Does Not Hold Lock-up Con-
dition".
7.CHECK SHIFT DOWN (D4L/U TO D4)
1. Release accelerator pedal.
2. Is lock-up released when accelerator pedal is released?
Ye s o r N o
Yes >>GOTO8
No >> Go To "14. Lock-up Is Not Released”,AT-254, "
14. Lock-
up Is Not Released". Continue ROAD TEST.
8.CHECK SHIFT DOWN (D4TO D3)
1. Decelerate vehicle by applying foot brake lightly.
2. Does engine speed return to idle smoothly when A/T is shifted from D
4to D3?
Read gear position and engine speed.
Ye s o r N o
Ye s > > 1 . St o p v e h i c l e .
2. Go To “Cruise test — Part 2”,AT-81, "
Cruise Test—
Part 2".
No >> Go To "15. Engine Speed Does Not Return To Idle (Light
Braking D
4®D3)”,AT-255, "15. Engine Speed Does
Not Return To Idle (Light Braking D4®D3)". Continue
ROAD TEST. Specified speed when lock-up occurs:
Refer to Shift schedule, $$$$$.
SAT957I
SAT958I
SAT959I

AT-82
[EURO-OBD]
TROUBLE DIAGNOSIS — BASIC INSPECTION
4.CHECK SHIFT UP (D3TO D4) AND ENGINE BRAKE
Release accelerator pedal after shifting from D
2to D3.
Does A/T shift from D
3to D4and does vehicle decelerate by engine brake?
Read gear position, throttle position and vehicle speed.
Ye s o r N o
Ye s > > 1 . St o p v e h i c l e .
2. Go To “Cruise test — Part 3”, $$$$$.
No >> Go To "11. A/T Does Not Shift: D
3®D4”,AT-249, "11 .
A/T Does Not Shift: D3®D4". Continue ROAD TEST.
SAT405H