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TROUBLE DIAGNOSIS
AT-57
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5. Start engine and measure line pressure at idle and 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-53, "
STALL TEST" .
Line Pressure
Judgement of Line Pressure Test
SAT4 9 3G
Engine speedLine pressure [kPa (kg/cm2 , psi)]
D, 2nd and 1st positions R position
Idle speed 500 (5.1, 73) 778 (7.9, 113)
Stall speed 1,173 (12.0, 170) 1,825 (18.6, 265)
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 - 2 2 , "
CLUTCH AND BAND CHART" .
Line pressure is high.
Accelerator pedal position signal malfunction
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.
Accelerator pedal position signal malfunction
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
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AT-58
TROUBLE DIAGNOSIS
Revision: June 20062007 Versa
Road TestUCS005MR
DESCRIPTION
The purpose of the test is to determine overall performance of A/
T and analyze causes of malfunctions.
The road test consists of the following three parts:
1. Check before engine is started. Refer to AT- 5 8
.
2. Check at idle. Refer to AT- 5 9
.
3. Cruise test
Inspection all the item from Part 1 to Part 3. Refer to AT - 6 1 ,
AT- 6 4
and AT- 6 5 .
Before road test, familiarize yourself with all test procedures and
items to check.
Perform tests on all items until specified symptom is found.
Troubleshoot the items which are checked out to be no good
after road test. Refer to AT-80, "
CONSULT-II Function (A/T)" ,
AT- 9 0 , "
Diagnostic Procedure Without CONSULT-II" and AT-
193, "TROUBLE DIAGNOSIS FOR SYMPTOMS" .
Check Before Engine is StartedUCS005MS
1. CHECK OD OFF INDICATOR LAMP
1. Park vehicle on flat surface.
2. Move selector lever to “P” position.
3. Turn ignition switch OFF. Wait at least 5 seconds.
4. Turn ignition switch ON. (Do not start engine.)
Does OD OFF indicator lamp come on for about 2 seconds?
YES >> 1. Turn ignition switch OFF.
2. Perform self-diagnosis and note NG items.
Refer to AT- 8 2 , "
SELF-DIAGNOSTIC RESULT
MODE" , AT - 9 0 , "Diagnostic Procedure Without CON-
SULT-II" .
3. Go to AT- 5 9 , "
Check at Idle" .
NO >> Stop “Road Test”. Go to AT-198, "
OD OFF Indicator
Lamp Does Not Come On" .
SAT7 8 6A
SAT4 9 6G
SAT7 7 2B
SCIA7140E
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TROUBLE DIAGNOSIS
AT-59
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Check at IdleUCS005M T
1. CHECK ENGINE START
1. Park vehicle on flat surface.
2. Turn ignition switch ON. (Do not start engine.)
3. Move selector lever to “P” or “N” position.
4. Turn ignition switch to “START” position.
Is engine started?
YES >> GO TO 2.
NO >>
Stop “Road Test”. Mark the box on the AT-47, "DIAG-
NOSTIC WORKSHEET" .
Go to AT-200, "Engine Cannot Be Started in “P” and
“N” Position" .
2. CHECK ENGINE START
1. Turn ignition switch ON. (Do not start engine.)
2. Move selector lever to “R”, “D”, “2” or “1” position.
3. Turn ignition switch to “START” position.
Is engine started?
YES >>Stop “Road Test”. Mark the box on the AT-47, "DIAG-
NOSTIC WORKSHEET" .
Go to AT-200, "Engine Cannot Be Started in “P” and
“N” Position" .
Continue “Road Test”.
NO >> GO TO 3.
3. CHECK VEHICLE MOVE
1. Move selector lever to “P” position.
2. Turn ignition switch OFF.
3. Release parking brake.
4. Push vehicle forward or backward.
Does vehicle move when it is pushed forward or backyard?
YES >>Mark the box on the AT-47, "DIAGNOSTIC WORK-
SHEET" .
Go to AT-201, "In “P” Position, Vehicle Moves For-
ward or Backward When Pushed" .
Continue “Road Test”.
NO >> GO TO 4.
SAT7 6 9B
SAT7 7 0B
SAT7 6 8B
SAT7 9 6A
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AT-60
TROUBLE DIAGNOSIS
Revision: June 20062007 Versa
4. CHECK VEHICLE MOVE
1. Apply parking brake.
2. Start engine.
3. Move selector lever to “N” position.
4. Release parking brake.
Does vehicle move forward or backward?
YES >>Mark the box on the AT - 4 7 , "DIAGNOSTIC WORK-
SHEET" .
Go to AT- 2 0 1 , "In “N” Position, Vehicle Moves" .
Continue “Road Test”.
NO >> GO TO 5.
5. CHECK SHIFT SHOCK
1. Apply foot brake.
2. Move selector lever to “R” position.
Is there large shock when changing from
“N” to “R” position?
YES >>Mark the box on the AT - 4 7 , "DIAGNOSTIC WORK-
SHEET" .
Go to AT- 2 0 2 , "Large Shock “N” → “R” Position" .
Continue “Road Test”.
NO >> GO TO 6.
6. CHECK VEHICLE MOVE
Release foot brake for several seconds.
Does vehicle creep backward when foot brake is released?
YES >> GO TO 7.
NO >>
Mark the box on the AT - 4 7 , "DIAGNOSTIC WORK-
SHEET" .
Go to AT-203, "Vehicle Does Not Creep Backward in
“R” Position" .
Continue “Road Test”.
SAT7 7 1B
SAT7 9 7A
SAT7 7 2B
SAT7 9 9A
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TROUBLE DIAGNOSIS
AT-61
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7. CHECK VEHICLE MOVE
Move selector lever to “D”, “2” and “1” positions and check if vehicle
creeps forward.
Does vehicle creep forward in all three positions?
YES >> Go to AT- 6 1 , "Cruise Test — Part 1" .
NO >>
Mark the box on the AT-47, "DIAGNOSTIC WORK-
SHEET" .
Go to AT-205, "Vehicle Does Not Creep Forward in
“D”, “2” or “1” Position" .
Continue “Road Test”.
Cruise Test — Part 1UCS005M U
1. CHECK STARTING GEAR (D1 ) POSITION
1. Drive vehicle for approximately 10 minutes to warm engine oil and ATF up to operating temperature.
2. Park vehicle on flat surface.
3. Push overdrive control switch. (OD OFF indicator lamp is off.)
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
half-way.
Read gear position. Refer to AT- 8 4 , "
DATA MONITOR
MODE" .
Does vehicle start from D
1 ?
YES >> GO TO 2.
NO >>
Mark the box on the AT-47, "DIAGNOSTIC WORK-
SHEET" .
Go to AT-206, "Vehicle Cannot Be Started from D1" .
Continue “Road Test”.
SAT7 7 3B
ATF operating temperature: 50 - 80°C (122 - 176°F)
SCIA5472E
SAT7 7 5B
SAT4 9 5G
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TROUBLE DIAGNOSIS
AT-63
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5. CHECK LOCK-UP (D4 TO D4 L/U)
Check lock-up (D
4 to D4 L/U).
Specified speed when lock-up occurs. Refer to AT-67, "
Vehicle Speed at Which Lock-up Occurs/Releases" .
Read vehicle speed, throttle opening when lock-up duty
becomes 94%. Refer to AT- 8 4 , "
DATA MONITOR MODE" .
Does A/T perform lock-up at the specified speed?
YES >> GO TO 6.
NO >>
Mark the box on the AT-47, "DIAGNOSTIC WORK-
SHEET" .
Go to AT-214, "A/T Does Not Perform Lock-up" .
Continue “Road Test”.
6. CHECK LOCK-UP HOLD
Check lock-up hold.
When lock-up duty becomes 94%. Refer to AT-84, "
DATA MONITOR MODE" .
Does A/T hold lock-up condition for more than 30 seconds?
YES >> GO TO 7.
NO >>
Mark the box on the AT - 4 7 , "DIAGNOSTIC WORKSHEET" .
Go to AT-215, "A/T Does Not Hold Lock-up Condition" .
Continue “Road Test”.
7. CHECK SHIFT-DOWN (D4 L/U TO D4 )
Release accelerator pedal.
When lock-up duty becomes 4%. Refer to AT-8 4, "
DATA MONITOR MODE" .
Is lock-up released when accelerator pedal is released?
YES >> GO TO 8.
NO >>
Mark the box on the AT - 4 7 , "DIAGNOSTIC WORKSHEET" .
Go to AT-216, "Lock-up Is Not Released" .
Continue “Road Test”.
8. CHECK SHIFT-DOWN (D4 TO D3 )
Decelerate vehicle by applying foot brake lightly.
Read gear position and engine speed. Refer to AT- 8 4 , "
DATA
MONITOR MODE" .
Does engine speed return to idle smoothly when A/T is shifted from
D4 to D3 ?
YES >> 1. Stop vehicle.
2. Go to AT- 6 4 , "
Cruise Test — Part 2" .
NO >>
Mark the box on the AT-47, "DIAGNOSTIC WORK-
SHEET" .
Go to AT-217, "Engine Speed Does Not Return to Idle
(Light Braking D4 → D3 )" .
Continue “Road Test”.
SCIA7191E
SAT9 5 9I
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TROUBLE DIAGNOSIS
AT-65
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4. CHECK SHIFT-UP (D3 TO D4 ) AND ENGINE BRAKE
Release accelerator pedal after shifting from D
2 to D3 .
Read gear position, throttle opening and vehicle speed.
Refer to AT-8 4, "
DATA MONITOR MODE" .
Does A/T shift from D
3 to D4 and does vehicle decelerate by engine
brake?
YES >> 1. Stop vehicle.
2. Go to AT- 6 5 , "
Cruise Test — Part 3" .
NO >>
Mark the box on the AT-47, "DIAGNOSTIC WORK-
SHEET" .
Go to AT-212, "A/T Does Not Shift: D3 → D4" .
Continue “Road Test”.
Cruise Test — Part 3UCS005MW
1. CHECK SHIFT-DOWN (D4 TO D3 )
1. Push overdrive control switch. (OD OFF indicator lamp is off.)
2. Move selector lever to “D” position.
3. Accelerate vehicle using half throttle to D
4 .
4. Release accelerator pedal.
5. Push overdrive control switch. (OD OFF indicator lamp is on.)
Read gear position and vehicle speed. Refer to AT- 8 4 ,
"DATA MONITOR MODE" .
Does A/T shift from D
4 to D3 (OD OFF)?
YES >> GO TO 2.
NO >>
Mark the box on the AT-47, "DIAGNOSTIC WORK-
SHEET" .
Go to AT-218, "A/T Does Not Shift: D4 → D3 , When
OD OFF" .
Continue “Road Test”.
SAT4 0 5H
SAT8 1 2A
SAT8 1 3A
SCIA5469E
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AT-66
TROUBLE DIAGNOSIS
Revision: June 20062007 Versa
2. CHECK ENGINE BRAKE
Check engine brake.
Does vehicle decelerate by engine brake?
YES >> GO TO 3.
NO >>
Mark the box on the AT - 4 7 , "DIAGNOSTIC WORK-
SHEET" .
Go to AT-223, "Vehicle Does Not Decelerate by
Engine Brake" .
Continue “Road Test”.
3. CHECK SHIFT-DOWN (D3 TO 22 )
Move selector lever from “D” to “2” position while driving in D
3 (OD
OFF).
Read gear position. Refer to AT-84, "
DATA MONITOR MODE"
.
Does A/T shift from D
3 (OD OFF) to 22 ?
YES >> GO TO 4.
NO >>
Mark the box on the AT - 4 7 , "DIAGNOSTIC WORK-
SHEET" .
Go to AT-219, "A/T Does Not Shift: D3 → 22 , When
Selector Lever “D” → “2” Position" .
Continue “Road Test”.
4. CHECK ENGINE BRAKE
Check engine brake.
Does vehicle decelerate by engine brake?
YES >> GO TO 5.
NO >>
Mark the box on the AT - 4 7 , "DIAGNOSTIC WORK-
SHEET" .
Go to AT-223, "Vehicle Does Not Decelerate by
Engine Brake" .
Continue “Road Test”.
5. CHECK SHIFT-DOWN (22 TO 11 )
Move selector lever from “2” to “1” position while driving in 2
2 .
Read gear position. Refer to AT-84, "
DATA MONITOR MODE"
.
Does A/T shift from 2
2 to 11 position?
YES >> GO TO 6.
NO >>
Mark the box on the AT - 4 7 , "DIAGNOSTIC WORK-
SHEET" .
Go to AT- 2 2 1 , "A/T Does Not Shift: 22 → 11 , When
Selector Lever “2” → “1” Position" .
Continue “Road Test”.
SCIA5469E
SAT7 9 1GA
SAT7 9 1GA
SAT7 7 8B