Nissan Pathfinder (2007 year). Manual - part 10

TROUBLE DIAGNOSIS

AT-51

D

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2007 Pathfinder

Schematic

ECS00EF5

BCWA0575E

AT-52

TROUBLE DIAGNOSIS

2007 Pathfinder

Inspections Before Trouble Diagnosis

ECS00EF6

A/T FLUID CHECK
Fluid Leakage and Fluid Level Check 

●

Inspect for fluid leakage and check the fluid level. Refer to 

AT-14, "Changing the A/T Fluid (ATF)"

 .

Fluid Condition Check

Inspect the fluid condition.

STALL TEST
Stall Test Procedure

1.

Inspect the amount of engine oil. Replenish the engine oil if necessary.

2.

Drive for about 10 minutes to warm up the vehicle so that the A/
T fluid temperature is 50 to 80

°

C (122 to 176

°

F). Inspect the

amount of ATF. Replenish if necessary.

3.

Securely engage the parking brake so that the tires do not turn.

4.

Engine start, apply foot brake, and place selector lever in “D”
position.

5.

While holding down the foot brake, gradually press down the
accelerator pedal.

6.

Quickly read off the stall speed, then quickly remove your foot
from the accelerator pedal.

CAUTION:

Do not hold down the accelerator pedal for more than 5 sec-
onds during this test.

Fluid condition

Conceivable Cause

Required Operation

Varnished (viscous 
varnish state)

Clutch, brake 
scorched

Replace the ATF and check the A/T 
main unit and the vehicle for mal-
functions (wire harnesses, cooler 
pipes, etc.)

Milky white or 
cloudy

Water in the fluid

Replace the ATF and check for 
places where water is getting in.

Large amount of 
metal powder mixed 
in

Unusual wear of 
sliding parts within 
A/T

Replace the ATF and check for 
improper operation of the A/T.

SAT638A

SAT647B

SCIA7463E

Stall speed:

2,200 - 2,500 rpm

SAT514G

TROUBLE DIAGNOSIS

AT-53

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AT

2007 Pathfinder

7.

Move the selector lever to the “N” position.

8.

Cool down the ATF.

CAUTION:

Run the engine at idle for at least one minute.

9.

Repeat steps 5 through 8 with selector lever in “3”, “2”, “1” and “R” positions.

Judgement of Stall Test

O: Stall speed within standard value position
H: Stall speed higher than standard value
L: Stall speed lower than standard value

Stall test standard value position

LINE PRESSURE TEST
Line Pressure Test Port

Line Pressure Test Procedure

1.

Inspect the amount of engine oil and replenish if necessary.

2.

Drive the car for about 10 minutes to warm it up so that the ATF reaches in range of 50 to 80

°

C (122 to

176

°

F), then inspect the amount of ATF and replenish if necessary.

NOTE:
The automatic fluid temperature rises in range of 50 to 80

°

C (122 to 176

°

F) during 10 minutes of

driving.

Selector lever position

Expected problem location

D, 3, 2, 1

R

Stall rotation 

H

O

●

Forward brake

●

Forward one-way clutch

●

1st one-way clutch

●

3rd one-way clutch

O

H

●

Reverse brake 

L

L

●

Engine and torque converter one-way clutch

H

H

●

Line pressure low

Does not shift-up D position 1 

→

 2

Slipping in 2nd, 3rd, 4th gears

Direct clutch slippage

Does not shift-up D position 2 

→

 3

Slipping in 3rd, 4th, 5th gears

High and low reverse clutch slippage

Does not shift-up D position 3 

→

 4

Slipping in 4th, 5th gears

Input clutch slippage

Does not shift-up D position 4 

→

 5

Slipping in 5th gear

Front brake slippage

SCIA2187E

AT-54

TROUBLE DIAGNOSIS

2007 Pathfinder

3.

After warming up remove the oil pressure detection plug and
install the oil pressure gauge [ST2505S001(J-34301-C)].

CAUTION:

When using the oil pressure gauge, be sure to use the O-
ring attached to the oil pressure detection plug.

4.

Securely engage the parking brake so that the tires do not turn.

5.

Start the engine, then measure the line pressure at both idle and
the stall speed.

CAUTION:

●

Keep the brake pedal pressed all the way down during
measurement.

●

 When measuring the line pressure at the stall speed,
refer to 

AT-52, "STALL TEST"

 .

6.

After the measurements are complete, install the oil pressure
detection plug and tighten to the regulation torque below.

CAUTION:

●

 Do not reuse the O-ring.

●

Apply ATF to O-ring.

Line Pressure

SCIA5309E

SCIA7463E

:7.3 N·m (0.74 kg-m, 65 in-lb)

SAT493G

Engine speed

Line pressure [kPa (kg/cm

2

 , psi)]

“R” position

“D” position

At idle speed

425-465 (4.3 - 4.7, 62 - 67)

379 - 428 (3.9 - 4.4, 55 - 62)

At stall speed

1,605 - 1,905 (16.4 - 19.9, 233 - 283)

1,310 - 1,500 (13.4 - 15.3, 190 - 218)

TROUBLE DIAGNOSIS

AT-55

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2007 Pathfinder

Judgement of Line Pressure Test

ROAD TEST
Description

●

The road test inspects overall performance of the A/T and analyzes possible malfunction causes.

●

The road test is carried out in the following three stages.

1.

Check before engine is started. Refer to 

AT-56

 .

2.

Check at idle. Refer to 

AT-56

 .

3.

Cruise test

●

Inspect all the items from Part 1 to Part 3. Refer to 

AT-57

 , 

AT-59

 , 

AT-60

 .

●

Before beginning the road test, check the test procedure and inspection items.

●

Test all inspection items until the symptom is uncovered. Diagnose NG items when all road tests are com-
plete.

Judgement Possible 

cause

Idle speed

Low for all positions 
(P, R, N, D)

Possible causes include malfunctions in the pressure supply system and low oil pump output.
For example

●

Oil pump wear

●

Pressure regulator valve or plug sticking or spring fatigue

●

Oil strainer 

Þ

 oil pump 

Þ

 pressure regulator valve passage oil leak

●

Engine idle speed too low

Only low for a spe-
cific position

Possible causes include an oil pressure leak in a passage or device related to the position after 
the pressure is distributed by the manual valve.

High

Possible causes include a sensor malfunction or malfunction in the line pressure adjustment func-
tion.
For example

●

Accelerator pedal position signal malfunction

●

ATF temperature sensor malfunction

●

Line pressure solenoid malfunction (sticking in “OFF” state, filter clog, cut line)

●

Pressure regulator valve or plug sticking

Stall speed

Oil pressure does 
not rise higher than 
the oil pressure for 
idle.

Possible causes include a sensor malfunction or malfunction in the pressure adjustment function.
For example

●

Accelerator pedal position signal malfunction

●

TCM breakdown

●

Line pressure solenoid malfunction (shorting, sticking in“ ON” state)

●

Pressure regulator valve or plug sticking

●

Pilot valve sticking or pilot filter clogged

The pressure rises, 
but does not enter 
the standard posi-
tion.

Possible causes include malfunctions in the pressure supply system and malfunction in the pres-
sure adjustment function.
 For example

●

Accelerator pedal position signal malfunction

●

Line pressure solenoid malfunction (sticking, filter clog)

●

Pressure regulator valve or plug sticking

●

Pilot valve sticking or pilot filter clogged

Only low for a spe-
cific position

Possible causes include an oil pressure leak in a passage or device related to the position after 
the pressure is distributed by the manual valve.

AT-56

TROUBLE DIAGNOSIS

2007 Pathfinder

Check Before Engine is Started

ECS00EF7

1. 

CHECK O/D OFF INDICATOR LAMP

1.

Park vehicle on level surface.

2.

Move selector lever to “P” position.

3.

Turn ignition switch to “OFF” position and wait at least 10 seconds.

4.

Turn ignition switch to “ON” position. (Do not start engine.)

Does O/D OFF indicator lamp light up for about 2 seconds?

YES

>> 1. Turn ignition switch “OFF”.

2. Perform self-diagnostics and record all NG items on the 

AT-47, "DIAGNOSTIC WORKSHEET"

. Refer to 

AT-88, "SELF-DIAGNOSTIC RESULT MODE"

 , 

AT-95, "Diagnostic Procedure With-

out CONSULT-II"

 .

3. Go to 

AT-56, "Check at Idle"

 .

NO

>> Stop the test and go to 

AT-177, "O/D OFF Indicator Lamp Does Not Come On"

 .

Check at Idle

ECS00EF8

1. 

CHECK STARTING THE ENGINE

1.

Park vehicle on level surface.

2.

Move selector lever to “P” or “N” position.

3.

Turn ignition switch to “OFF” position.

4.

Turn ignition switch to “START” position.

Does the engine start?

YES

>> GO TO 2.

NO

>> Stop the road test and go to 

AT-178, "Engine Cannot Be Started In “P” or “N” Position"

 .

2. 

CHECK STARTING THE ENGINE

1.

Turn ignition switch to “ON” position.

2.

Move selector lever in “D”, “3”, “2”, “1” or “R” position.

3.

Turn ignition switch to “START” position.

Does the engine start in either position?

YES

>> Stop the road test and go to 

AT-178, "Engine Cannot Be Started In “P” or “N” Position"

 .

NO

>> GO TO 3.

3. 

CHECK “P” POSITION FUNCTIONS

1.

Move selector lever to “P” position.

2.

Turn ignition switch to “OFF” position.

3.

Release the parking brake.

4.

Push the vehicle forward or backward.

5.

Engage the parking brake.

When you push the vehicle with disengaging the parking brake, does it move?

YES

>> Enter a check mark at “In “P” Position Vehicle Moves When Pushed” on the diagnostics work-

sheet, then continue the road test.

NO

>> GO TO 4. 

TROUBLE DIAGNOSIS

AT-57

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2007 Pathfinder

4. 

CHECK “N” POSITION FUNCTIONS

1.

Start the engine.

2.

Move selector lever to “N” position.

3.

Release the parking brake.

Does vehicle move forward or backward?

YES

>> Enter a check mark at “In “N” Position Vehicle Moves” on the diagnostics worksheet, then con-

tinue the road test. 

NO

>>  GO TO 5.

5. 

CHECK SHIFT SHOCK

1.

Engage the brake.

2.

Move selector lever to “D” position.

When the transmission is shifted from “N” to “D”, is there an excessive shock?

YES

>> Enter a check mark at “Large Shock (“N” to “D” Position)” on the diagnostics worksheet, then con-

tinue the road test.

NO

>> GO TO 6.

6. 

CHECK “R” POSITION FUNCTIONS

1.

Engage the brake.

2.

Move selector lever to “R” position.

3.

Release the brake for 4 to 5 seconds.

Does the vehicle creep backward?

YES

>> GO TO 7.

NO

>> Enter a check mark at “Vehicle Does Not Creep Backward In “R” Position” on the diagnostics

worksheet, then continue the road test.

7. 

CHECK “D” POSITION FUNCTIONS 

Inspect whether the vehicle creep forward when the transmission is put into the “D” position.

Does the vehicle creep forward in the “D” positions?

YES

>> Go to 

AT-57, "Cruise Test - Part 1"

 , 

AT-59, "Cruise Test - Part 2"

 and 

AT-60, "Cruise Test - Part 3"

.

NO

>> Enter a check mark at “Vehicle Does Not Creep Forward In “D” Positions” on the diagnostics

worksheet, then continue the road test. 

Cruise Test - Part 1

ECS00EF9

1. 

CHECK STARTING OUT FROM D1

1.

Drive the vehicle for about 10 minutes to warm up the engine oil and ATF.
Appropriate temperature for the ATF: 50 - 80

°

C (122 - 176

°

F)

2.

Park the vehicle on a level surface.

3.

Move selector lever to “P” position.

4.

Start the engine.

5.

Set overdrive control switch to ON position.

6.

Move selector lever to “D” position.

7.

Press the accelerator pedal about half way down to accelerate the vehicle.

 With CONSULT-II

Read off the gear positions.

Starts from D1?

YES

>> GO TO 2.

NO

>> Enter a check mark at “Vehicle Cannot Be Started From D1” on the diagnostics worksheet, then

continue the road test.

AT-58

TROUBLE DIAGNOSIS

2007 Pathfinder

2. 

CHECK SHIFT-UP D1 

→

 D2

Press down the accelerator pedal about half way and inspect if the vehicle shifts up (D1 

→

 D2) at the appropri-

ate speed.

●

Refer to 

AT-62, "Vehicle Speed at Which Gear Shifting Occurs"

 .

 With CONSULT-II

Read the gear position, throttle degree of opening, and vehicle speed.

Does the A/T shift-up D1 

→

 D2 at the correct speed?

YES

>> GO TO 3.

NO

>> Enter a check mark at “A/T Does Not Shift: D1 

→

 D2” on the diagnostics worksheet, then continue

the road test.

3. 

CHECK SHIFT-UP D2 

→

 D3

Press down the accelerator pedal about half way and inspect if the vehicle shifts up (D2 

→

 D3) at the appropri-

ate speed.

●

Refer to 

AT-62, "Vehicle Speed at Which Gear Shifting Occurs"

 .

 With CONSULT-II

Read the gear position, throttle degree of opening, and vehicle speed.

Does the A/T shift-up D2 

→

 D3 at the correct speed?

YES

>> GO TO 4.

NO

>> Enter a check mark at “A/T Does Not Shift: D2 

→

 D3” on the diagnostics worksheet, then continue

the road test.

4. 

CHECK SHIFT-UP D3 

→

 D4

Press down the accelerator pedal about half way and inspect if the vehicle shifts up (D3 

→

 D4) at the appropri-

ate speed.

●

Refer to 

AT-62, "Vehicle Speed at Which Gear Shifting Occurs"

 .

 With CONSULT-II

Read the gear position, throttle degree of opening, and vehicle speed.

Does the A/T shift-up D3 

→

 D4 at the correct speed?

YES

>> GO TO 5.

NO

>> Enter a check mark at “A/T Does Not Shift: D3 

→

 D4” on the diagnostics worksheet, then continue

the road test.

5. 

CHECK SHIFT-UP D4 

→

 D5

Press down the accelerator pedal about half way and inspect if the vehicle shifts up (D4 

→

 D5) at the appropri-

ate speed.

●

Refer to 

AT-62, "Vehicle Speed at Which Gear Shifting Occurs"

 .

 With CONSULT-II

Read the gear position, throttle degree of opening, and vehicle speed.

Does the A/T shift-up D4 

→

 D5 at the correct speed?

YES

>> GO TO 6.

NO

>> Enter a check mark at “A/T Does Not Shift: D4 

→

 D5” on the diagnostics worksheet, then continue

the road test.