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TROUBLE DIAGNOSIS — BASIC INSPECTION
AT-67
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Line Pressure TestECS004QS
LINE PRESSURE TEST PORTS
Location of line pressure test ports are shown in the illustration.
●Always 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 AT F
reach operating temperature.
3. Install pressure gauge to corresponding line pressure port.
4. Set parking brake and block wheels.
●Continue 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
Page 2146 of 3833
![NISSAN X-TRAIL 2001 Service Repair Manual AT-68
[EURO-OBD]
TROUBLE DIAGNOSIS — BASIC INSPECTION
5. Start engine and measure line pressure at idle and stall speed.
●When measuring line pressure at stall speed, follow the
stall test NISSAN X-TRAIL 2001 Service Repair Manual AT-68
[EURO-OBD]
TROUBLE DIAGNOSIS — BASIC INSPECTION
5. Start engine and measure line pressure at idle and stall speed.
●When measuring line pressure at stall speed, follow the
stall test](/manual-img/5/57405/w960_57405-2145.png)
AT-68
[EURO-OBD]
TROUBLE DIAGNOSIS — BASIC INSPECTION
5. Start engine and measure line pressure at idle and stall speed.
●When measuring line pressure at stall speed, follow the
stall test procedure.
Line pressure: Refer to AT- 5 2 1 , "
SERVICE DATA AND SPECIFI-
CATIONS (SDS)" .
JUDGEMENT OF LINE PRESSURE TEST
Road TestECS004QT
DESCRIPTION
●The purpose of the test is to determine overall performance of A/
T and analyze causes of problems.
●The 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.
●Oil pump wear
●Control piston damage
●Pressure regulator valve or plug sticking
●Spring for pressure regulator valve damaged
●Fluid pressure leakage between oil strainer and pressure regulator valve
●Clogged strainer
Line pressure is low in particular posi-
tion.
●Fluid pressure leakage between manual valve and particular clutch
●For 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 AT- 1 9 , "
CLUTCH AND BAND CHART" .
Line pressure is high.
●Maladjustment of throttle position sensor
●A/T fluid temperature sensor damaged
●Line pressure solenoid valve sticking
●Short circuit of line pressure solenoid valve circuit
●Pressure modifier valve sticking
●Pressure regulator valve or plug sticking
●Open in dropping resistor circuit
At stall
speedLine pressure is low.
●Maladjustment of throttle position sensor
●Line pressure solenoid valve sticking
●Short circuit of line pressure solenoid valve circuit
●Pressure regulator valve or plug sticking
●Pressure modifier valve sticking
●Pilot valve sticking
SAT786A
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TROUBLE DIAGNOSIS — BASIC INSPECTION
AT-69
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3. Cruise test
●Before road test, familiarize yourself with all test procedures and
items to check.
●Conduct tests on all items until specified symptom is found.
Troubleshoot items which check out No Good after road test.
Refer to the following items.
ON BOARD DIAGNOSTIC SYS-
TEM DESCRIPTIONTROUBLE DIAGNOSES FOR
SYMPTOMS
EURO-OBDAT- 3 7 , "
ON BOARD DIAGNOS-
TIC SYSTEM DESCRIPTION"
to AT-50, "Diagnostic Procedure
Without CONSULT-II"
AT- 2 0 9 , "O/D OFF Indicator
Lamp Does Not Come On" to AT-
241, "TCM Self-diagnosis Does
Not Activate"
SAT496G
Page 2148 of 3833
![NISSAN X-TRAIL 2001 Service Repair Manual AT-70
[EURO-OBD]
TROUBLE DIAGNOSIS — BASIC INSPECTION
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 NISSAN X-TRAIL 2001 Service Repair Manual AT-70
[EURO-OBD]
TROUBLE DIAGNOSIS — BASIC INSPECTION
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](/manual-img/5/57405/w960_57405-2147.png)
AT-70
[EURO-OBD]
TROUBLE DIAGNOSIS — BASIC INSPECTION
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 >> GO TO 2
No >> Stop Road Test. Go to “O/D OFF Indicator Lamp Does
Not Come On”, AT- 2 0 9
.
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)>>TCM is under fail-safe mode. Per-
form self-diagnosis and check NG items on the DIAG-
NOSTIC WORKSHEET, AT- 2 5 9 , "
DIAGNOSTIC
WORKSHEET" . Refer to AT- 2 5 3 , "SELF-DIAGNOSTIC
PROCEDURE (WITHOUT CONSULT-II)" .
No (Except for Euro-OBD)>>1.Turn ignition switch to “OFF” posi-
tion.
2. Perform self-diagnosis and note NG items.
Refer to AT- 2 5 3 , "
SELF-DIAGNOSTIC PROCEDURE
(WITHOUT CONSULT-II)" .
3. Go to “2. CHECK AT IDLE”, AT- 7 1
.
Yes (EURO-OBD)>>TCM is under fail-safe mode. Perform self-diagnosis and check NG items on the DIAG-
NOSTIC WORKSHEET, AT- 5 7 , "
DIAGNOSTIC WORKSHEET" . Refer to AT- 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 to AT- 5 1 , "
TCM SELF-DIAGNOSTIC PROCEDURE (NO TOOLS)" .
3. Go to “2. CHECK AT IDLE”, AT- 7 1
.
SAT774B
SCIA0693E
SCIA0693E
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TROUBLE DIAGNOSIS — BASIC INSPECTION
AT-71
[EURO-OBD]
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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
Ye s > > G O T O 2
No >> Stop Road Test. Mark the box on the DIAGNOSTIC
WORKSHEET.Go to “Engine Cannot Be Started In “P”
and “N” Position” AT- 2 11
.
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 >> Stop Road Test. Mark the box on the DIAGNOSTIC
WORKSHEET. Go To “Engine Cannot Be Started In “P”
and “N” Position”, AT- 2 11
. Continue Road Test.
No >> GO TO 3
SAT769B
SAT770B
Page 2150 of 3833
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 of “In “P” Position, Vehicle Moves Forward
Or Backward When Pushed” on the DIAGNOSTIC
WORKSHEET. 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 of “In “N” Position, Vehicle Moves” on the
DIAGNOSTIC WORKSHEET. Continue Road Test.
No >> GO TO 5
SAT768B
SAT796A
SAT771B
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![NISSAN X-TRAIL 2001 Service Repair Manual TROUBLE DIAGNOSIS — BASIC INSPECTION
AT-73
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5.CHECK SHIFT SHOCK
1. Apply foot brake.
2. Move selector lever to “R” position.
3. Is there large shock when chan NISSAN X-TRAIL 2001 Service Repair Manual TROUBLE DIAGNOSIS — BASIC INSPECTION
AT-73
[EURO-OBD]
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5.CHECK SHIFT SHOCK
1. Apply foot brake.
2. Move selector lever to “R” position.
3. Is there large shock when chan](/manual-img/5/57405/w960_57405-2150.png)
TROUBLE DIAGNOSIS — BASIC INSPECTION
AT-73
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5.CHECK SHIFT SHOCK
1. Apply foot brake.
2. Move selector lever to “R” position.
3. Is there large shock when changing from “N” to “R” position?
Ye s o r N o
Yes >> Mark the box of “Large Shock “N” → “R” Position” on the
DIAGNOSTIC WORKSHEET. Continue Road Test.
No >> GO TO 6
6.CHECK VEHICLE MOVE
1. Release foot brake for several seconds.
2. Does vehicle creep backward when foot brake is released?
Ye s o r N o
Ye s > > G O T O 7
No >> Mark the box of “Vehicle Does Not Creep Backward In
“R” Position” on the DIAGNOSTIC WORKSHEET. Con-
tinue Road Test.
7.CHECK VEHICLE MOVE
1. Move selector lever to “D”, “2” and “1” positions and check if
vehicle creeps forward.
2. Does vehicle creep forward in all three positions?
Ye s o r N o
Yes >> Go To “3. CRUISE TEST”, AT- 7 4 .
No >> Mark the box of “Vehicle Does Not Creep Forward In
“D”, “2” Or “1” Position” on the DIAGNOSTIC WORK-
SHEET. Continue Road Test.
SAT797A
SAT772B
SAT799A
SAT773B
Page 2152 of 3833
AT-74
[EURO-OBD]
TROUBLE DIAGNOSIS — BASIC INSPECTION
3. CRUISE TEST
●Check all items listed in Parts 1 through 3.
With CONSULT-II
●Using CONSULT-II, conduct a cruise test and record the result.
●Print the result and ensure that shifts and lock-ups take place as per Shift Schedule.
CONSULT-II Setting Procedure
1. Turn ignition switch “OFF”.
2. Connect CONSULT-II to data link connector, which is located in
left side lower dash panel.
3. Turn ignition switch “ON”.
4. Touch “START”.
SAT601J
SCIA0691E
SCIA0692E
SAT586J