engine oil NISSAN VERSA 2006 Workshop Service User Guide

TROUBLE DIAGNOSIS
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Inspections Before Trouble DiagnosisUCS005MQ
A/T FLUID CHECK
Fluid Leakage and Fluid Level Check
Check fluid leakage and check the fluid level. Refer to AT-16, "Checking A/T Fluid" .
Fluid Condition Check
Check the A/T fluid condition.
STALL TEST
Stall Test Procedure
1. Check ATF and engine oil levels. If necessary, add ATF and
engine oil.
2. Drive vehicle for approximately 10 minutes or until ATF and
engine oil reach operating temperature.
3. Set parking brake and block wheels.
4. Install a tachometer where it can be seen by driver during test.

It 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.
Fluid status Conceivable Cause Required Operation
Varnished (viscous
varnish state)Clutch, brake
scorchedReplace the ATF and check the A/T
main unit and the vehicle for mal-
functions (wire harnesses, cooler
pipes, etc.)
Milky white or
cloudyWater in the ATFReplace the ATF and check for
places where water is getting in.
Large amount of
metal powder mixed
inUnusual wear of
sliding parts within
A/TReplace the ATF and check for
improper operation of the A/T.
SAT6 3 8A
ATF operating temperature: 50 - 80°C (122 - 176°F)
SAT6 4 7B
SAT5 1 3G
SAT7 7 5B

AT-56
TROUBLE DIAGNOSIS
Revision: June 20062007 Versa
LINE PRESSURE TEST
Line Pressure Test Ports
Location of line pressure test ports are shown in the figure.

Always replace pressure plugs as they are self-sealing
bolts.
Line Pressure Test Procedure
1. Check ATF and engine oil levels. If necessary, add ATF or
engine oil.
2. Drive vehicle for approx. 10 minutes or until engine oil and ATF
reach operating temperature.
3. Install oil pressure gauge to corresponding line pressure test
port.
4. Set parking brake and block wheels.
SCIA7187E
ATF operating temperature: 50 - 80°C (122 -176°F)
SAT6 4 7B
SCIA6528J
SAT5 1 3G

TROUBLE DIAGNOSIS
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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

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

AT-74
TROUBLE DIAGNOSIS
Revision: June 20062007 Versa
Slips/Will Not EngageRaces extremely fast
or slips in changing
from D
3 to D2 when
depressing accelera-
tor pedal. ON vehicle1. A/T fluid levelAT- 1 6
2. Accelerator pedal position sensor EC-532
3. Line pressure testAT- 5 6
4. Line pressure solenoid valveAT- 1 4 5
5. Shift solenoid valve BAT- 1 5 6
6. Control valve assemblyAT- 2 4 2
OFF vehicle7. Brake bandAT- 3 4 38. High clutchAT- 3 1 4
Races extremely fast
or slips in changing
from D
4 or D3 to D 1
when depressing
accelerator pedal.ON vehicle1. A/T fluid levelAT- 1 6
2. Accelerator pedal position sensorEC-532
3. Line pressure testAT- 5 6
4. Line pressure solenoid valveAT- 1 4 5
5. Shift solenoid valve AAT- 1 5 1
6. Shift solenoid valve BAT- 1 5 6
7. Control valve assemblyAT- 2 4 2
OFF vehicle8. Forward clutchAT- 3 2 09. Forward one-way clutchAT- 3 3 2
10. Low one-way clutchAT- 2 6 8
Vehicle will not run in
any position.ON vehicle1. A/T fluid levelAT- 1 6
2. Control cable adjustmentAT- 2 3 3
3. Line pressure testAT- 5 6
4. Line pressure solenoid valveAT- 1 4 5
OFF vehicle5. Oil pumpAT- 2 8 9
6. High clutchAT- 3 1 4
7. Brake bandAT- 3 4 3
8. Low & reverse brakeAT- 3 2 7
9. Torque converterAT- 2 6 8
10. Parking componentsAT- 2 5 7
OthersEngine cannot be
started in “P” and “N”
positions.
AT- 2 0 0
ON vehicle1. Ignition switch and starterPG-4
, SC-10
2. Control cable adjustmentAT- 2 3 3
3. PNP switch adjustmentAT- 2 4 7
Engine starts in posi-
tions other than “P”
and “N”.ON vehicle1. Control cable adjustmentAT- 2 3 3
2. PNP switch adjustmentAT- 2 4 7
Transaxle noise in“ P”
and “N” positions.ON vehicle1. A/T fluid levelAT- 1 6
2. Line pressure testAT- 5 6
3. Accelerator pedal position sensorEC-532
4. Vehicle speed sensor·A/T (Revolution sensor)
and vehicle speed sensor·MTRAT- 1 0 7, AT- 1 6 6
OFF vehicle5. Oil pumpAT- 2 8 96. Torque converterAT- 2 6 8
Items Symptom Condition Diagnostic item Reference page

AT-76
TROUBLE DIAGNOSIS
Revision: June 20062007 Versa
OthersMaximum speed not
attained. Poor accel-
eration.ON vehicle1. A/T fluid levelAT- 1 6
2. PNP switch adjustmentAT- 2 4 6
3. Overdrive control switchAT- 1 8 6
4. Accelerator pedal position sensorEC-532
5. Vehicle speed sensor·A/T (Revolution sensor)
and vehicle speed sensor·MTRAT- 1 0 7, AT- 1 6 6
6. Shift solenoid valve AAT- 1 5 1
7. Shift solenoid valve BAT- 1 5 6
8. Control valve assemblyAT- 2 4 2
OFF vehicle9. Reverse clutchAT- 3 0 9
10. High clutchAT- 3 1 4
11. Brake bandAT- 3 4 3
12. Low & reverse brakeAT- 3 2 7
13. Oil pumpAT- 2 8 9
14. Torque converterAT- 2 6 8
Transaxle noise in
“D”, “2”, “1” and “R”
positions.ON vehicle 1. A/T fluid levelAT- 1 6
OFF vehicle 2. Torque converterAT- 2 6 8
Engine brake does
not operate in “1”
position.ON vehicle1. PNP switch adjustmentAT- 2 4 6
2. Control cable adjustmentAT- 2 3 3
3. Vehicle speed sensor·A/T (Revolution sensor)
and vehicle speed sensor·MTRAT- 1 0 7, AT- 1 6 6
4. Control valve assemblyAT- 2 4 2
5. Overrun clutch solenoid valveAT- 1 6 1
OFF vehicle6. Overrun clutchAT- 3 2 07. Low & reverse brakeAT- 3 2 7
Transaxle overheats.ON vehicle1. A/T fluid levelAT- 1 6
2. Engine idling speedEC-75
3. Accelerator pedal position sensorEC-532
4. Line pressure testAT- 5 6
5. Line pressure solenoid valveAT- 1 4 5
6. Control valve assemblyAT- 2 4 2
OFF vehicle7. Oil pumpAT- 2 8 9
8. Reverse clutchAT- 3 0 9
9. High clutchAT- 3 1 4
10. Brake bandAT- 3 4 3
11. Forward clutchAT- 3 2 0
12. Overrun clutchAT- 3 2 0
13. Low & reverse brakeAT- 3 2 7
14. Torque converterAT- 2 6 8
Items Symptom Condition Diagnostic item Reference page

AT-128
DTC P0734 A/T 4TH GEAR FUNCTION
Revision: June 20062007 Versa
DTC P0734 A/T 4TH GEAR FUNCTIONPFP:31940
DescriptionUCS005ON

This malfunction will not be detected while the OD OFF indicator lamp is indicating another self-diagnosis
malfunction.

This malfunction is detected when the A/T does not shift into fourth gear position or the torque converter
clutch does not lock up as instructed by the TCM. This is not caused by electrical malfunction (circuits
open or shorted) but by mechanical malfunction such as control valve sticking, improper solenoid valve
operation, malfunctioning oil pump or torque converter clutch, etc.
CONSULT-II Reference ValueUCS005OO
Remarks: Specification data are reference values.
On Board Diagnosis LogicUCS005OP

This is an OBD-II self-diagnostic item.

Diagnostic trouble code “P0734 A/T 4TH GR FNCTN” with CONSULT-II is detected when A/T cannot be
shifted to the 4th gear position even if electrical circuit is good.

This diagnosis monitors actual gear position by checking the torque converter slip ratio calculated by TCM
as follows:
Torque converter slip ratio = A x C/B
A: Output shaft revolution signal from revolution sensor
B: Engine speed signal from ECM
C: Gear ratio determined as gear position which TCM supposes
If the actual gear position is much lower than the position (4th) supposed by TCM, the slip ratio will be
much less than normal. In case the ratio does not reach the specified value, TCM judges this diagnosis
malfunction.
This malfunction will be caused when shift solenoid valve A is stuck open or shift solenoid valve B is stuck
closed.

Gear positions supposed by TCM are as follows.
In case of gear position with no malfunctions: 1, 2, 3 and 4 positions
In case of gear position with shift solenoid valve A stuck open: 2, 2, 3 and 3* positions
In case of gear position with shift solenoid valve B stuck closed: 1, 2, 2 and 1* positions to each gear
position above
*: “P0734 A/T 4TH GR FNCTN” is detected.
Possible CauseUCS005OQ

Shift solenoid valve A

Shift solenoid valve B

Line pressure solenoid valve

Each clutch

Hydraulic control circuit
Gear position 1 2 3 4
Shift solenoid valve A ON (Closed) OFF (Open) OFF (Open) ON (Closed)
Shift solenoid valve B ON (Closed) ON (Closed) OFF (Open) OFF (Open)
Item name Condition Display value (Approx.)
LINE PRES DTYSmall throttle opening (Low line pressure) ⇔ Large
throttle opening (High line pressure)0% ⇔ 94%

DTC P0744 A/T TCC S/V FUNCTION (LOCK-UP)
AT-139
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DTC P0744 A/T TCC S/V FUNCTION (LOCK-UP)PFP:31940
DescriptionUCS005P1

This malfunction will not be detected while the OD OFF indicator lamp is indicating another self-diagnosis
malfunction.

This malfunction is detected when the A/T does not shift into fourth gear position or the torque converter
clutch does not lock-up as instructed by the TCM. This is not caused by electrical malfunction (circuits
open or shorted) but by mechanical malfunction such as control valve sticking, improper solenoid valve
operation, malfunctioning oil pump or torque converter clutch, etc.
CONSULT-II Reference ValueUCS005P2
Remarks: Specification data are reference values.
On Board Diagnosis LogicUCS005P3

This is an OBD-II self-diagnostic item.

Diagnostic trouble code “P0744 A/T TCC S/V FNCTN” with CONSULT-II is detected when A/T cannot per-
form lock-up even if electrical circuit is good.

This diagnosis monitors actual gear position by checking the torque converter slip ratio calculated by TCM
as follows:
Torque converter slip ratio = A x C/B
A: Output shaft revolution signal from revolution sensor
B: Engine speed signal from ECM
C: Gear ratio determined as gear position which TCM supposes
If the actual gear position is much lower than the position (4th) supposed by TCM, the slip ratio will be
much less than normal. In case the ratio does not reach the specified value, TCM judges this diagnosis
malfunction.
This malfunction will be caused when shift solenoid valve B is stuck closed.

Gear positions supposed by TCM are as follows.
In case of gear position with no malfunctions: 1, 2, 3 and 4 positions
In case of gear position with shift solenoid valve B stuck closed: 1, 2, 2 and 1* positions to each gear posi-
tion above
*: “P0744 A/T TCC S/V FNCTN” is detected.
Possible CauseUCS005P4

Line pressure solenoid valve

Torque converter clutch solenoid valve

Each clutch

Hydraulic control circuit
Item name Condition Display value (Approx)
TCC S/V DUTY Lock-up OFF ⇔ Lock-up ON 4% ⇔ 94%

DTC P0745 LINE PRESSURE SOLENOID VALVE
AT-145
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DTC P0745 LINE PRESSURE SOLENOID VALVEPFP:31940
DescriptionUCS005P7
The line pressure solenoid valve regulates the oil pump discharge pressure to suit the driving condition in
response to signals sent from the TCM.
The line pressure duty cycle value is not constant when the closed throttle position switch is ON. To
confirm the line pressure duty cycle at low-pressure, the accelerator (throttle) should be open until the
closed throttle position switch is OFF.
CONSULT-II Reference ValueUCS005P8
Remarks: Specification data are reference values.
On Board Diagnosis LogicUCS005P9

This is an OBD-II self-diagnostic item.

Diagnostic trouble code “P0745 LINE PRESSURE S/V” with CONSULT-II or 11th judgement flicker with-
out CONSULT-II is detected when TCM detects an improper voltage drop while it tries to operate the sole-
noid valve.
Possible CauseUCS005PA

Harness or connector
(The solenoid circuit is open or shorted.)

Line pressure solenoid valve
DTC Confirmation ProcedureUCS005PB
CAUTION:
If performing this “DTC Confirmation Procedure” again, always turn ignition switch OFF and wait at
least 10 seconds before continuing.
After the repair, perform the following procedure to confirm the malfunction is eliminated.
WITH CONSULT-II
1. Turn ignition switch ON and select “DATA MONITOR” mode for
“A/T” with CONSULT-II.
2. Touch “START”.
3. Depress accelerator pedal completely and wait at least 1 sec-
ond.
4. If the check result is NG, go to AT-147, "
Diagnostic Procedure" .
WITH GST
Follow the procedure “WITH CONSULT-II”.
WITHOUT CONSULT-II
1. Start engine.
2. With brake pedal depressed, shift the lever from “P” → “N” → “D” → “N” → “P” positions.
3. Perform self-diagnosis. Refer to AT- 9 0 , "
Diagnostic Procedure Without CONSULT-II" .
4. If the check result is NG, go to AT-147, "
Diagnostic Procedure" .
Item name Condition Display value (Approx.)
LINE PRES DTYSmall throttle opening (Low line pressure) ⇔ Large
throttle opening (High line pressure)0% ⇔ 94%
BCIA0031E

TROUBLE DIAGNOSIS FOR SYMPTOMS
AT-217
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Engine Speed Does Not Return to Idle (Light Braking D4 → D3 )UCS005VA
SYMPTOM:
Engine speed does not smoothly return to idle when A/T shifts from D4 to D3 on “Cruise Test — Part
1”.
DIAGNOSTIC PROCEDURE
1. CHECK SELF-DIAGNOSTIC RESULTS
Perform self-diagnosis. Refer to AT-82, "
SELF-DIAGNOSTIC RESULT MODE" or AT-90, "Diagnostic Proce-
dure Without CONSULT-II" .
Is any malfunction detected by self-diagnostic results?
YES >> Check the malfunctioning system. Refer to AT- 8 2 , "SELF-DIAGNOSTIC RESULT MODE" or AT-
91, "Judgement of Self-diagnosis Code" .
NO >> GO TO 2.
2. CHECK ACCELERATOR PEDAL POSITION SENSOR
Check accelerator pedal position sensor. Refer to EC-532, "
DTC P2138 APP SENSOR" .
OK or NG
OK >> GO TO 3.
NG >> Repair or replace accelerator pedal position sensor.
3. CHECK A/T FLUID CONDITION
1. Remove oil pan. Refer to AT-257, "
Components" .
2. Check A/T fluid condition. Refer to AT-53, "
Fluid Condition Check" .
OK or NG
OK >> GO TO 5.
NG >> GO TO 4.
4. DETECT MALFUNCTIONING ITEM
1. Remove control valve assembly. Refer to AT-242, "
Control Valve Assembly and Accumulators" .
2. Check the following items:
–Overrun clutch control valve
–Overrun clutch reducing valve
–Overrun clutch solenoid valve
3. Disassemble A/T. Refer to AT- 2 6 8 , "
Disassembly" .
4. Check the following items:
–Overrun clutch assembly. Refer to AT-320, "Forward and Overrun Clutches" .
OK or NG
OK >> GO TO 6.
NG >> Repair or replace damaged parts.
5. DETECT MALFUNCTIONING ITEM
1. Remove control valve assembly. Refer to AT-242, "
Control Valve Assembly and Accumulators" .
2. Check the following items:
–Overrun clutch control valve
–Overrun clutch reducing valve
–Overrun clutch solenoid valve
OK or NG
OK >> GO TO 6.
NG >> Repair or replace damaged parts.