2009 NISSAN LATIO checking oil

AT
N
O P
• The valve body contains precision parts and requires extreme care when parts are removed and serviced.
Place disassembled valve body parts in order for easier and proper assembly. Care will also prevent springs
and small parts from becoming scattered or lost.
• Properly installed valves, sleeves, plugs, etc. will slide along bores in valve body under their own weight.
• Before assembly, apply a coat of recommended ATF to all parts. Apply petroleum jelly to protect O-rings and
seals, or hold bearings and washers in pl ace during assembly. Do not use grease.
• Extreme care should be taken to avoid damage to O-rings, seals and gaskets when assembling.
• Clean or replace ATF cooler if excessive foreign material is found in oil pan or clogging strainer. Refer to AT-18, " A/T Fluid Cooler Cleaning " .
• After overhaul, refill the A/T with new ATF.
• When the A/T drain plug is removed, only some of the fluid is drained. Old A/T fluid will remain in torque con- verter and ATF cooling system.
Always follow the procedures under “Changing A/T Fluid” in the AT section when changing A/T fluid. Refer to
AT-17, " Changing A/T Fluid " ,
AT-17, " Checking A/T Fluid " .
Service Notice or Precaution INFOID:0000000004305292
ATF COOLER SERVICE If A/T fluid contains frictional material (clutches, bands, etc.), or if an A/T is repaired, overhauled, or replaced,
inspect and clean the A/T oil cooler mounted in the radiator or replace the radiator. Flush cooler lines using
cleaning solvent and compressed air after repair. Check Serv ice Bulletins for latest A/T oil cooler cleaning pro-
cedure. For radiator replacement, refer to CO-16, " Removal and Installation " (HR16DE engine models),
CO-38, " Removal and Installation " (MR18DE engine models).
TORQUE CONVERTER SERVICE The torque converter should be replaced under any of the following conditions:
• External leaks in the hub weld area.
• Converter hub is scored or damaged.
• Converter pilot is broken, damaged or fits poorly into crankshaft.
• Steel particles are found after flushing the cooler and cooler lines.
• Pump is damaged or steel particles are found in the converter.
• Vehicle has TCC shudder and/or no TCC apply. Replace only after all hydraulic and electrical diagnoses
have been made. (Converter clutch material may be glazed.)
• Converter is contaminated with engi ne coolant containing antifreeze.
• Internal malfunction of stator roller clutch.
• Heavy clutch debris due to overheating (blue converter).
• Steel particles or clutch lining material found in flui d filter or on magnet when no internal parts in unit are
worn or damaged — indicates that lining material came from converter.
The torque converter should not be replaced if:
• The fluid has an odor, is discolored, and there is no evidence of metal or clutch facing particles.
• The threads in one or more of the converter bolt holes are damaged.
• A/T malfunction did not display evidence of damaged or worn internal parts, steel particles or clutch plate lin-
ing material in unit and inside the fluid filter.
• Vehicle has been exposed to high mileage (only). The e xception may be where the torque converter clutch
dampener plate lining has seen excess wear by vehicles operated in heavy and/or constant traffic, such as
taxi, delivery or police use.
OBD-II SELF-DIAGNOSIS • A/T self-diagnosis is performed by the TCM in combination with the ECM. The results can be read through the blinking pattern of the OD OFF indicator lamp or the malfunction indicator lamp (MIL). Refer to the table
on AT-83, " Diagnosis Procedure without CONSULT-III " for the indicator used to display each self-diagnostic
result.
• The self-diagnostic results indicated by the MIL ar e automatically stored in both the ECM and TCM memo-
ries.
Always perform the procedure “HOW TO ERASE DTC” on AT-39, " OBD-II Diagnostic Trouble Code
(DTC) " to complete the repair and avo
id unnecessary blinking of the MIL.
• The following self-diagnostic items can be detected us ing ECM self-diagnostic results mode* only when the
OD OFF indicator lamp does not indicate any malfunctions.
- PNP switch
- A/T 1st, 2nd, 3rd, or 4th gear function
*: For details of OBD-II, refer to AT-39 .

Checking A/T Fluid " .
A/T Fluid Cooler Cleaning INFOID:0000000004305297
Whenever the A/T is repaired, overhauled, or replaced, the A/T fluid cooler mounted in the radiator must be
inspected and cleaned.
Metal debris and friction material, if present, can becom e trapped in the A/T fluid cooler. This debris can con-
taminate the newly serviced A/T or, in severe cases, can bloc k or restrict the flow of A/T fluid. In either case,
malfunction of the newly serviced A/T may result.
Debris, if present, may build up as A/T fluid enters the c ooler inlet. It will be necessary to back flush the cooler
through the cooler outlet in order to flush out any built up debris.
A/T FLUID COOLER CLEANING PROCEDURE
1. Identify the A/T inlet and outlet fluid cooler hoses.
2. Position an oil pan under the A/T inlet and outlet fluid cooler hoses.
3. Disconnect the A/T fluid cooler inlet and outlet rubber hoses from the steel cooler tubes or bypass valve.
NOTE:
Replace the cooler hoses if rubber material from the hose
remains on the tube fitting.
4. Allow any A/T fluid that remains in the cooler hoses to drain into
the oil pan.
5. Insert the extension adapter hose of a can of Transmission
Cooler Cleaner (Nissan P/N 999MP-AM006) into the cooler out-
let hose.
CAUTION:
• Wear safety glasses and rubber gloves when spraying the Transmission Cooler Cleaner.
• Spray Transmission Cooler Cleaner only with adequate
ventilation.
• Avoid contact with eyes and skin.
• Do not breathe vapors or spray mist.
6. Hold the hose and can as high as possible and spray Transmis- sion Cooler Cleaner in a continuous stream into the cooler outlet
hose until A/T fluid flows out of t he cooler inlet hose for 5 seconds.
7. Insert the tip of an air gun into the end of the cooler outlet hose.
8. Wrap a shop rag around the air gun tip and end of cooler outlet hose.
9. Blow compressed air regulated to 5 - 9 kg/cm 2
(71 - 128 psi) through the cooler outlet hose for 10 seconds
to force out any remaining A/T fluid.
10. Repeat steps 5 through 9 three additional times.
11. Position an oil pan under the banjo bolts that connec t the A/T fluid cooler steel lines to the A/T.
12. Remove the banjo bolts. Fluid grade and capacity: Refer to
MA-14 .
SCIA5630E

AT
N
O P
z
: Solenoid ON
× : Solenoid OFF
–: Non-standard condition
Line Pressure Solenoid Valve If non-standard solenoid signal is sent to TCM, line pre ssure solenoid valve is turned OFF to achieve maxi-
mum oil pressure.
Torque Converter Clutch Solenoid Valve If non-standard solenoid signal is sent to TCM, torque conv erter clutch solenoid valve is turned OFF to release
lock-up.
Overrun Clutch Solenoid Valve If non-standard solenoid signal is sent to TCM, overr un clutch solenoid valve is turned OFF to engage overrun
clutch. This will result in more effective engine brake during deceleration.
How to Perform Trouble Diagnosis for Quick and Accurate Repair INFOID:0000000004305316
INTRODUCTION The TCM receives a signal from the vehicle speed sensor, accelera-
tor pedal position sensor or PNP switch and provides shift control or
lock-up control via A/T solenoid valves.
The TCM also communicates with the ECM by means of a signal
sent from sensing elements used wit h the OBD-related parts of the
A/T system for malfunction-diagnostic purposes. The TCM is capa-
ble of diagnosing malfunctioning parts while the ECM can store mal-
functions in its memory.
Input and output signals must always be correct and stable in the
operation of the A/T system. T he A/T system must be in good oper-
ating condition and be free of valve seizure, solenoid valve malfunc-
tion, etc.
It is much more difficult to diagnose a malfunction t hat occurs intermittently rather than continuously. Most
intermittent malfunctions are caused by poor electric c onnections or improper wiring. In this case, careful
checking of suspected circuits may hel p prevent the replacement of good parts.
Shift position
Normal
Malfunction in solenoid
valve A Malfunction in solenoid
valve B Malfunction in solenoid
valves A and B
A B Gear A B Gear A B Gear A B Gear
“D” position z z
1st –z→×
3rd z
→× –
3rd – –
3rd
×
z2nd – z→× × – – –
× × 3rd – x ×– – –
z ×4th – x z→× – – –
“2” position z z
1st –z→× z→× – – –
× z2nd – z→× × – – –
× × 3rd – x ×– – –
“1” position z z
1st –z→× z→× – – –
× z2nd – z→× × – – –
× × 3rd – x ×– – –

AT
N
O P
Inspections Before Trouble Diagnosis
INFOID:0000000004305319
A/T FLUID CHECK
Fluid Leakage and Fluid Level Check Check fluid leakage and check the fluid level. Refer to AT-17, " 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
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 ATFReplace the ATF and check for plac-
es 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 im-
proper operation of the A/T. SAT775B

Check at Idle " .
OK or NG OK >>
INSPECTION END
NG >> GO TO 5. TCM Terminal and Reference Value " .
2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector.
OK or NG OK >>
INSPECTION END
NG >> Repair or replace damaged parts.
Vehicle Does Not Creep Ba ckward in "R" Position INFOID:0000000004305477
SYMPTOM:
Vehicle does not creep backward when selecting “R” position.
DIAGNOSTIC PROCEDURE Checking A/T Fluid " .
OK or NG OK >> GO TO 2.
NG >> Refill ATF. Inspections Before Trouble
Diagnosis " .
OK or NG OK >> GO TO 4.
NG >> GO TO 3. Control Valve Assembly and Accumulators " .
2. Check the following items:
- Valves to control line pressure (Pressure regulator valve, pressure modifier valve, pilot valve and pilot fil- ter)
- Line pressure solenoid valve
3. Disassemble A/T. Refer to AT-256, " Disassembly " .
4. Check the following item:
- Oil pump assembly. Refer to AT-277, " Oil Pump " .
OK or NG OK >> GO TO 4.
NG >> Repair or replace damaged parts. Inspections Before Trouble
Diagnosis " .
OK or NG OK >> GO TO 6.
OK in “1” position, NG in “R” position>>GO TO 5.
NG in both “1” and “R” positions>>GO TO 7. Disassembly " .

Check at Idle " and
AT-58, " Cruise Test - Part 1 " .
Are “ Vehicle Does Not Creep Forward in “ D ” , “ 2 ” or “ 1 ” Position ” and “ Vehicle Cannot Be Started from D OK?
YES >> GO TO 2.
NO >> Go to AT-187, " Vehicle Does Not Creep Forward in "D", "2" or "1" Position " and
AT-188, " Vehicle
Cannot Be Started from D .
Checking of A/T Position " .
OK or NG OK >> GO TO 3.
NG >> Adjust A/T position. Refer to AT-216, " Adjustment of A/T Position " .
and
AT-154 .
OK or NG OK >> GO TO 4.
NG >> Repair or replace vehicle speed sensor·A/T (revolution sensor) and vehicle speed sensor·MTR circuits. Description " (HR16DE),
EC-959, " Component
Description " (MR Type 1) or
EC-1481, " Component Description " (MR Type 2).
OK or NG OK >> GO TO 5.
NG >> Repair or replace accelerator pedal position sensor. Component " .
2. Check A/T fluid condition. Refer to AT-51, " Inspections Before Trouble Diagnosis " .
OK or NG OK >> GO TO 7.
NG >> GO TO 6. Control Valve Assembly and Accumulators " .
2. Check the following items:
- Shift valve B
- Shift solenoid valve B
- Pilot valve
- Pilot filter
3. Disassemble A/T. Refer to AT-256, " Disassembly " .
4. Check the following items:
- Servo piston assembly
- High clutch assembly. Refer to AT-301, " High Clutch " .
- Oil pump assembly. Refer to AT-277, " Oil Pump " .
OK or NG OK >> GO TO 8.
NG >> Repair or replace damaged parts.

TROUBLE DIAGNOSIS FOR SYMPTOMS
AT-201
< SERVICE INFORMATION >
D
E
F
G H
I
J
K L
M A
B AT
N
O P
OK >> GO TO 3
NG >> Check PNP switch. Refer to AT-176, " Component Inspection " .
2.
CHECK PNP SWITCH CIRCUIT
Without CONSULT-III
1. Turn ignition switch ON. (Do not start engine.)
2. Check voltage between TCM connector terminals and ground
while moving selector lever through each position. Refer to AT-92, " Wiring Diagram - AT - PNP/SW " .
B: Battery voltage
0: 0V
OK or NG OK >> GO TO 3
NG >> Check PNP switch. Refer to AT-176, " Component Inspection " .
3.
CHECK A/T POSITION
Check A/T position. Refer to AT-216, " Checking of A/T Position " .
OK or NG OK >> GO TO 4.
NG >> Adjust A/T position. Refer to AT-216, " Adjustment of A/T Position " .
4.
CHECK VEHICLE SPEED SENS OR·A/T AND VEHICLE SPEED SENSOR·MTR CIRCUIT
Check vehicle speed sensor·A/T (re volution sensor) and vehicle speed sensor·MTR circuit. Refer to AT-101and/or
AT-154 .
OK or NG OK >> GO TO 5.
NG >> Repair or replace vehicle speed sensor·A/T (revolution sensor) and/or vehicle speed sensor·MTR
circuits. 5.
CHECK A/T FLUID CONDITION
1. Remove oil pan. Refer to AT-236, " Component " .
2. Check A/T fluid condition. Refer to AT-51, " Inspections Before Trouble Diagnosis " .
OK or NG OK >> GO TO 7.
NG >> GO TO 6. 6.
DETECT MALFUNCTIONING ITEM
1. Remove control valve assembly. Refer to AT-221, " Control Valve Assembly and Accumulators " .
2. Check the following items: Selector lever position
Terminal
36 35 34 27 26
“P”, “N” B 0 0 0 0 “R” 0 B 0 0 0
“D” 0 0 B 0 0 “2” 0 0 0 B 0
“1” 0 0 0 0 B SCIA7162E

AT-204< SERVICE INFORMATION >
TROUBLE DIAGNOSIS FOR SYMPTOMS
2. Check voltage between TCM connector terminals and ground while moving selector lever through each position. Refer to AT-92, " Wiring Diagram - AT - PNP/SW " .
B: Battery voltage
0: 0V
OK or NG OK >> GO TO 5
NG >> Check PNP switch. Refer to AT-176, " Component Inspection " .
5.
CHECK A/T POSITION
Check A/T position. Refer to AT-216, " Checking of A/T Position " .
OK or NG OK >> GO TO 6.
NG >> Adjust A/T position. Refer to AT-216, " Adjustment of A/T Position " .
6.
CHECK VEHICLE SPEED SENSOR·A/T A ND VEHICLE SPEED SENSOR·MTR CIRCUIT
Check vehicle speed sensor·A/T (revolution senso r) and vehicle speed sensor·MTR circuit. Refer to AT-101and/or
AT-154 .
OK or NG OK >> GO TO 7.
NG >> Repair or replace vehicle speed sensor·A/T (revolution sensor) and/or vehicle speed sensor·MTR
circuits. 7.
CHECK ACCELERATOR PEDAL POSITION SENSOR
Check accelerator pedal position sensor. Refer to EC-412, " Description " (HR16DE),
EC-959, " Component
Description " (MR Type 1) or
EC-1481, " Component Description " (MR Type 2).
OK or NG OK >> GO TO 8.
NG >> Repair or replace accelerator pedal position sensor. 8.
CHECK A/T FLUID CONDITION
1. Remove oil pan. Refer to AT-236, " Component " .
2. Check A/T fluid condition. Refer to AT-51, " Inspections Before Trouble Diagnosis " .
OK or NG OK >> GO TO 10.
NG >> GO TO 9. 9.
DETECT MALFUNCTIONING ITEM
1. Remove control valve assembly. Refer to AT-221, " Control Valve Assembly and Accumulators " .
Selector lever position
Terminal
36 35 34 27 26
“P”, “N” B 0 0 0 0 “R” 0 B 0 0 0
“D” 0 0 B 0 0 “2” 0 0 0 B 0
“1” 0 0 0 0 B SCIA7162E