oil pressure NISSAN LATIO 2007 Service Owner's Manual

AT-242
ON-VEHICLE SERVICE
Revision: June 20062007 Versa
ON-VEHICLE SERVICEPFP:00000
Control Valve Assembly and AccumulatorsUCS005VR
COMPONENTS
REMOVAL AND INSTALLATION
Removal
1. Disconnect the battery negative terminal.
2. Remove engine under cover and fender protector (LH). Refer to EI-22, "
Removal and Installation" .
3. Drain the A/T fluid. Refer to AT-16, "
A/T FLUID" .
4. Remove oil pan and oil pan gasket.
5. Check for foreign materials in oil pan to help determine cause of
malfunction. If the ATF is very dark, smell burned or contains for-
eign particles, friction material (clutches, band) may need
replacement. A tacky film that will not wipe clean indicates var-
nish build up. Varnish can cause valves, servo, and clutches to
stick and can inhibit pump pressure.

If ATF contains frictional material (clutch, bands, etc.),
replace radiator and flush cooler line using cleaning sol-
vent and compressed air after repair of A/T. Refer to CO-
11, "RADIATOR" .
6. Remove magnets from oil pan.
1. A/T 2. O-ring 3. Return spring
4. Control valve assembly 5. Oil pan gasket 6. Oil pan
7. Drain plug gasket 8. Drain plug 9. Magnet
10. Oil pan fitting bolt 11. Snap ring 12. O-ring
13. Servo release accumulator piston 14. N-D accumulator piston 15. O-ring
16. Return spring 17. Lip seal
SCIA8024E
SCIA8025E

AT-270
DISASSEMBLY
Revision: June 20062007 Versa
9. Set manual shaft (1) in “P” position.
10. Remove PNP switch (2) from transaxle case.
: Bolt (3)
11. Remove oil pan fitting bolts.
12. Remove oil pan and oil pan gasket.
13. Check foreign materials in oil pan to help determine causes of
malfunction. If the ATF is very dark, smells burned, or contains
foreign particles, frictional material (clutches, band) may need
replacement. A tacky film that will not wipe clean indicates var-
nish build up. Varnish can cause valves, servo, and clutches to
stick and can inhibit pump pressure.

If frictional material is detected, replace radiator after
repair of A/T. Refer to CO-11, "
RADIATOR" .
14. Remove magnets from oil pan.
15. Remove control valve assembly according to the following procedures.
a. Remove snap ring (1) from terminal body (2).
CAUTION:
Do not expand snap ring (1) excessively.
b. Push terminal body (2) into transaxle case.
c. Remove control valve assembly fitting bolts A , B and C .
Bolt length, number and location:
d. Remove control valve assembly from transaxle case.
CAUTION:
Be careful not to drop manual valve.
SCIA5904J
SCIA8025E
SCIA6030J
Bolt symbol A B C
Bolt length “ ” [mm (in)]
40.0 mm
(1.575 in)33.0 mm
(1.299 in)43.5 mm
(1.713 in)
Number of bolts 5 6 2
SCIA5 911 J

REPAIR FOR COMPONENT PARTS
AT-293
D
E
F
G
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MA
B
AT
Revision: June 20062007 Versa
Control Valve AssemblyUCS005W 5
COMPONENTS
1. Pilot filter 2. Control valve upper body 3. Steel ball
4. Separating plate 5. Control valve inter body 6. Steel ball
7. Support plate 8. Separating plate 9. Control valve lower body
10. Line pressure relief valve spring 11. Check ball 12. Torque converter pressure holding
spring
13. Solenoid valve assembly 14. Terminal body 15. O-ring
16. O-ring 17. O-ring 18. Oil strainer
Refer to GI section to make sure icons (symbol marks) in the figure. Refer to GI-10, "
Components" .
SCIA5967J

REPAIR FOR COMPONENT PARTS
AT-297
D
E
F
G
H
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K
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MA
B
AT
Revision: June 20062007 Versa
INSPECTION
Control Valve Lower and Upper Bodies
CAUTION:
Be careful not to lose these parts.

Check to see that retainer plates are properly positioned in con-
trol valve lower body.

Check to see that retainer plates are properly positioned in con-
trol valve upper body.
Oil Strainer
Check wire netting of oil strainer for damage. Replace if necessary.
Shift Solenoid Valves “A” and “B”, Line Pressure Solenoid Valve, Torque Converter Clutch
Solenoid Valve and Overrun Clutch Solenoid Valve
Measure resistance.

For shift solenoid valve A, refer to AT-155, "Component Inspec-
tion" .

For shift solenoid valve B, refer to AT-160, "Component Inspec-
tion" .

For line pressure solenoid valve, refer to AT-150, "Component
Inspection" .

For torque converter clutch solenoid valve, refer to AT-138,
"Component Inspection" .

For overrun clutch solenoid valve, refer to AT-165, "Component
Inspection" .
A/T Fluid Temperature Sensor
Measure resistance.
SCIA4978E
SCIA4979E
SCIA3291E
SCIA3485E

AT-298
REPAIR FOR COMPONENT PARTS
Revision: June 20062007 Versa

For A/T fluid temperature sensor, refer to AT-175, "Component
Inspection" .
Line Pressure Relief Valve Springs and Torque Converter Pressure Holding Spring

Check each spring for damage or deformation. Also measure
free length and outer diameter. Refer to AT-380, "
Control
Va l v e s" .

Replace springs if deformed or fatigued.
ASSEMBLY
1. Install control valve upper, inter and lower body.
a. Place oil circuit of control valve upper body face up. Install steel
balls in their proper positions.
b. Install reamer bolts (F) from bottom of control valve upper body
(1). Using reamer bolts (F) as guides, install separating plate (2)
as a set.
SCIA7533E
SAT1 3 8D
SAT8 7 1J
SCIA7010E

AT-328
REPAIR FOR COMPONENT PARTS
Revision: June 20062007 Versa
4. Set Tool A on spring retainer assembly, and remove snap ring
from transaxle case while compressing spring retainer assem-
bly.
CAUTION:
Set SST directly over return springs.
5. Remove spring retainer assembly from transaxle case.
CAUTION:
Do not remove return springs from spring retainer.
6. Apply compressed air into the oil hole on transaxle case as
shown in the figure to raise piston while strongly pressing the
whole low & reverse brake piston by hand. When applying com-
pressed air, strongly press the whole piston and adjust the pres-
sure so that it is raised evenly. Portion (A) (low & reverse brake
pressure) especially tends to tilt.
CAUTION:
Apply air gradually and allow low & reverse brake piston to
come out evenly.
7. Remove low & reverse brake piston from transaxle case by turn-
ing it.
8. Inspect transaxle case. Replace if damaged or worn.
9. Remove seal lip (1) and D-ring (2) from low & reverse brake pis-
ton (3).Tool number: KV31103200 (J-39186)
SCIA7990E
SCIA6346J
SCIA6516J

BCS-18
BCM (BODY CONTROL MODULE)
Revision: June 20062007 Versa
WORK SUPPORT
Display Item List
CAN Communication Inspection Using CONSULT-II (Self-Diagnosis)EKS00I88
1. SELF-DIAGNOSTIC RESULT CHECK
NOTE:
If CONSULT-II is used with no connection of CONSULT-II CONVERTER, malfunctions might be detected in
self-diagnosis depending on control unit which carries out CAN communication.
1. Connect CONSULT–II and CONSULT-II CONVERTER, and select “BCM” on “SELECT SYSTEM” screen.
2. Select “BCM” on “SELECT TEST ITEM” screen, and select “SELF-DIAG RESULTS”.
3. Check display content in self-diagnostic results.
Contents displayed
No malfunction>>Inspection End
Malfunction in CAN communication system>>After printing the monitor items, go to “CAN System”. Refer to
LAN-7, "
TROUBLE DIAGNOSIS" .
Oil pressure switch SIGNAL BUFFER××
Low tire pressure mon-
itorAIR PRESSURE
MONITOR×× × ×
Panic alarm PANIC ALARM× System and itemCONSULT-II dis-
playDiagnostic test mode (Inspection by part)
WORK
SUPPORTSELF−
DIAG
RESULTSCAN DIAG
SUPPORT
MNTRDATA
MONITORECU
PA R T
NUMBERACTIVE
TESTCON-
FIGU-
RATION
Item Description
RESET SETTING VALUE Return a value set with WORK SUPPORT of each system to a default value in factory shipment.
CONSULT-II display code Diagnosis item
U1000INITIAL DIAG
TRANSMIT DIAG
ECM
IPDM E/R
METER/M&A
I-KEY

CL-4
NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING
Revision: June 20062007 Versa
NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTINGPFP:00003
NVH Troubleshooting ChartECS00FSV
Use the chart below to help you find the cause of the symptom. The numbers indicate the order of the inspec-
tion. If necessary, repair or replace these parts.
Reference pageCL-5CL-8EM-73CL-11CL-13EM-103
SUSPECTED PARTS (Possible cause)
CLUTCH PEDAL (Inspection and adjustment)
CLUTCH LINE (Air in line)
ENGINE MOUNTING (Loose)
CSC (Concentric slave cylinder) (Worn, dirty or damaged)
CLUTCH DISC (Out of true)
CLUTCH DISC (Runout is excessive)
CLUTCH DISC (Lining broken)
CLUTCH DISC (Dirty or burned)
CLUTCH DISC (Oily)
CLUTCH DISC (Worn out)
CLUTCH DISC (Hardened)
CLUTCH DISC (Lack of spline grease)
DIAPHRAGM SPRING (Damaged)
DIAPHRAGM SPRING (Out of tip alignment)
PRESSURE PLATE (Distortion)
FLYWHEEL (Distortion)
SymptomClutch grabs/chatters 1 2 2 2 2 2
Clutch pedal spongy 1
Clutch noisy 1
Clutch slips 1 2 2 3 4 5
Clutch does not disengage 1 2 5 5 5 5 5 5 6 6 7

CLUTCH DISC, CLUTCH COVER AND FLYWHEEL
CL-13
D
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F
G
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B
CL
Revision: June 20062007 Versa
CLUTCH DISC, CLUTCH COVER AND FLYWHEELPFP:30100
Removal and InstallationECS00FT2
COMPONENTS
CAUTION:

If transaxle assembly is removed from the vehicle, always replace CSC (Concentric slave cylin-
der). Return CSC insert to original position to remove transaxle assembly. Dust on clutch disc
sliding parts may damage CSC seal and may cause clutch fluid leakage.

Be careful not to apply any grease to the clutch disc facing, pressure plate surface and flywheel
surface.
REMOVAL
1. Remove transaxle assembly from the vehicle. Refer to MT-15, "Removal and Installation" .
2. Loosen clutch cover bolts evenly. Then remove clutch cover and clutch disc.
INSPECTION AND ADJUSTMENT AFTER REMOVAL
Clutch Disc

Check clutch disc for backlash of spline and runout of facing.

Check clutch disc for burns, discoloration or oil or grease leak-
age. Replace if necessary.

Measure backlash to clutch disc spline and input shaft spline at
the circumference of clutch disc. If outside the specification,
replace clutch disc.
1. Flywheel 2. Clutch disc *1, *2 3. Clutch cover
Apply lithium-based grease including molybdenum disulphide.
*1. Do not clean in solvent. *2. When installing, be careful that grease applied to input shaft does not adhere to
clutch disc.
WCIA0637E
Maximum backlash of spline
(at outer edge of disc): 1.0 mm (0.039 in)
Distance of runout check point
(from hub center): 215 mm (8.46 in)
Maximum allowable spline backlash : 1.0 mm (0.039 in)
SCL221

RADIATOR
CO-13
C
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CO
Revision: June 20062007 Versa
Checking Radiator CapEBS00T7E

Check valve seat of radiator cap.
–Check if valve seat is swollen to the extent that the edge of the
plunger cannot be seen when watching it vertically from the top.
–Check if valve seat has no soil and damage.

Pull negative-pressure valve to open it, and make sure that it is
completely closed when released.
–Make sure that there is no dirt or damage on the valve seat of
radiator cap negative-pressure valve.
–Make sure that the valve operates properly in the opening and
closing conditions.

Check radiator cap relief pressure using Tool.
–When connecting the radiator cap to the tester, apply water or
coolant to the cap seal surface.
–Replace the radiator cap if there is an abnormality in the nega-
tive-pressure valve, or if the open-valve pressure is outside of
the standard values.

Replace radiator cap if there it does not comply to specifications to the above three checks.
CAUTION:
When installing radiator cap, thoroughly wipe out the radiator filler neck to remove any waxy residue
or foreign material.
Checking RadiatorEBS00T7F
Check radiator for mud or clogging. If necessary, clean radiator as follows.

Be careful not to bend or damage radiator fins.

When radiator is cleaned without removal, remove all surrounding parts such as cooling fan, radiator
shroud and horns. Then tape harness and connectors to prevent water from entering.
1. Apply water by hose to the back side of the radiator core vertically downward.
2. Apply water again to all radiator core surface once per minute.
3. Stop washing if any stains no longer flow out from radiator.
4. Blow air into the back side of radiator core vertically downward.

Use compressed air lower than 490 kPa (4.9 bar, 5 kg/cm2 , 71 psi) and keep distance more than 30 cm
(11.8 in).
PBIC2816E
SM A96 7B
Tool number : EG17650301 (J-33984-A)
Standard: 78 – 98 kPa (0.78 - 0.98 bar, 0.8 – 1.0 kg/cm
2 ,
11 – 14 psi)
Limit: 59 kPa (0.59 bar, 0.6 kg/cm
2 , 9 psi)
WBIA0570E