2007 NISSAN LATIO coolant

ENGINE MAINTENANCE
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ENGINE MAINTENANCE PFP:00100
Drive BeltsELS001XU
Checking Drive BeltsELS001XV
WA RN ING:
Be sure to perform this step when the engine is stopped.

Make sure that the indicator (notch on fixed side) of drive belt auto-tensioner is within the possible use
range (A).
NOTE:

Check the drive belt auto-tensioner indication when the engine is cold.

When new drive belt is installed, the indicator (notch on fixed side) should be within the range (B) in the
figure.

Visually check entire drive belt for wear, damage or cracks.

If the indicator (notch on fixed side) is out of the possible use range or belt is damaged, replace drive belt.
Tension AdjustmentELS001XW
Belt tension is not necessary, as it is automatically adjusted by drive belt auto-tensioner.
Changing Engine CoolantELS001XX
WA RN ING:

To avoid being scalded, do not change engine coolant when engine is hot.

Wrap a thick cloth around radiator cap and carefully remove the cap. First, turn the cap a quarter
of a turn to release built-up pressure. Then turn the cap all the way.

Be careful not to allow engine coolant to contact drive belt.
DRAINING ENGINE COOLANT
1. Open radiator drain plug (1) at the bottom of radiator, and then
remove radiator cap.

Vehicle front
When drain all of engine coolant in the system, open water
drain plug on cylinder block. Refer to EM-77, "
CYLINDER
BLOCK" .
CAUTION:

Perform this step when engine is cold.

Do not spill engine coolant on drive belt.
2. Remove reservoir tank as necessary, and drain engine coolant and clean reservoir tank before installing.
Refer to CO-11, "
RADIATOR" .
3. Check drained engine coolant for contaminants such as rust, corrosion or discoloration.
1. Alternator 2. Drive belt auto–tensioner 3. Crankshaft pulley
4.A/C compressor (models with A/C)
Idler pulley (models without A/C)5. Water pump 6. Drive belt
A. Possible use range B. Range when new drive belt is installed C. Indicator
PBIC3137J
PBIC3799E

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ENGINE MAINTENANCE
Revision: June 20062007 Versa
If contaminated, flush the engine cooling system. Refer to MA-15, "FLUSHING COOLING SYSTEM" .
REFILLING ENGINE COOLANT
1. Install reservoir tank if removed. Refer to CO-11, "RADIATOR" .
2. Install radiator drain plug.

If water drain plug on cylinder block is removed, close and tighten it. Refer to EM-77, "CYLIN-
DER BLOCK" .
CAUTION:
Be sure to clean radiator drain plug and install with new O-ring. Refer to CO-11, "
Components" .
3. Make sure that each hose clamp has been firmly tightened.
4. Remove air duct assembly. Refer to EM-16, "
AIR CLEANER AND AIR DUCT" .
5. Disconnect heater hose (1) at position ( ) as shown.

Front

Enhance heater hose as high as possible.
6. Fill radiator and reservoir tank to specified level.

Pour engine coolant through engine coolant filler neck
slowly of less than 2 (2 1/8 US qt, 1-3/4 lmp qt) a minute
to allow air in system to escape.

Use NISSAN Genuine Engine Coolant or equivalent
mixed with water (distilled or demineralized). Fill cooling
system to specification. Refer to MA-11, "
RECOM-
MENDED FLUIDS AND LUBRICANTS".

When engine coolant overflows disconnected heater hose,
connect heater hose, and continue filling the engine coolant, if
heater hose is disconnected.
7. Install radiator cap.
8. Install air duct assembly. Refer to EM-16, "
AIR CLEANER AND AIR DUCT" .
9. Warm up until opening thermostat. Standard for warming-up time is approximately 10 minutes at 3,000
rpm.

Make sure thermostat opening condition by touching radiator hose (lower) to see a flow of warm water.
CAUTION:
Watch water temperature gauge so as not to overheat the engine.
10. Stop engine and cool down to less than approximately 50°C (122°F).

Cool down using fan to reduce the time.

If necessary, refill radiator up to filler neck with engine coolant.
11. Refill reservoir tank to “MAX” level line with engine coolant.
12. Repeat steps 6 through 10 two or more times with radiator cap installed until engine coolant level no
longer drops.
13. Check cooling system for leaks with engine running.
14. Warm up engine, and check for sound of engine coolant flow while running engine from idle up to 3,000
rpm with heater temperature controller set at several position between “COOL” and “WARM”.

Sound may be noticeable at heater unit.
15. Repeat step 14 three times.
16. If sound is heard, bleed air from cooling system by repeating steps 6 through 10 until engine coolant level
no longer drops.
PBIC3802E
SM A18 2B

ENGINE MAINTENANCE
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FLUSHING COOLING SYSTEM
1. Install reservoir tank if removed. Refer to CO-11, "RADIATOR" .
2. Install radiator drain plug.

If water drain plug on cylinder block is removed, close and tighten it. Refer to EM-77, "CYLIN-
DER BLOCK" .
CAUTION:
Be sure to clean radiator drain plug and install with new O-ring. Refer to CO-11, "
Components" .
3. Fill radiator and reservoir tank with water and reinstall radiator cap.
4. Run engine and warm it up to normal operating temperature.
5. Rev engine two or three times under no-load.
6. Stop engine and wait until it cools down.
7. Drain water from the cooling system. Refer to MA-13, "
DRAINING ENGINE COOLANT" .
8. Repeat steps 1 through 7 until clear water begins to drain from radiator.
InspectionELS0020L
LEVEL CHECK

Check if the reservoir tank engine coolant level is within the
“MIN” to “MAX” range when engine is cool.

Adjust the engine coolant level as necessary.
CHECKING COOLING SYSTEM FOR LEAKS
To check for leaks, apply pressure to the cooling system using Tool.
WA RN ING:
Never remove the radiator cap when the engine is hot. Serious
burns could occur from high pressure coolant escaping from
the radiator.
CAUTION:
Higher pressure than specified may cause radiator damage.
Checking Fuel LinesELS001XZ
Inspect fuel lines, fuel filler cap and fuel tank for improper attach-
ment, leaks, cracks, damage, loose connections, chafing or deterio-
ration.
If necessary, repair or replace damaged parts.
SM A41 2B
Tool number : EG17650301 (J-33984-A)
Testing pressure
: 157 kPa (1.6 kg/cm
2 , 23 psi)
WBIA0568E
SM A80 3A

MTC-58
TROUBLE DIAGNOSIS
Revision: June 20062007 Versa
Insufficient HeatingEJS0057Q
SYMPTOM: Insufficient heating
INSPECTION FLOW
1. CONFIRM SYMPTOM BY PERFORMING OPERATIONAL CHECK - TEMPERATURE DECREASE
1. Turn temperature control dial clockwise to maximum heat position.
2. Check for hot air at discharge air outlets.
Can the symptom be duplicated?
YES >> GO TO 3.
NO >> GO TO 2.
2. CHECK FOR ANY SYMPTOMS
Perform a complete operational check for any symptoms. Refer to MTC-33, "
Operational Check" .
Does another symptom exist?
YES >> Refer to MTC-24, "SYMPTOM TABLE" .
NO >> System OK.
3. CHECK FOR SERVICE BULLETINS
Check for any service bulletins.
>> GO TO 4.
4. CHECK COOLANT SYSTEM
1. Check engine coolant level. Refer to CO-8, "
ENGINE COOLANT" .
2. Check hoses for leaks or kinks.
3. Check Radiator cap. Refer to CO-13, "
Checking Radiator Cap" .
OK or NG
OK >> GO TO 5.
NG >> Repair/replace as necessary.
5. CHECK AIR MIX DOOR CABLE
Check air mix door cable operation. Refer to MTC-70, "
Air Mix Door Cable Adjustment" .
OK or NG
YES >> GO TO 6.
NO >> Adjust or replace air mix door cable. Refer to MTC-70, "
Air Mix Door Cable Adjustment" .
6. CHECK AIR DUCTS
Check ducts for air leaks.
OK or NG
OK >> GO TO 7.
NG >> Repair air leaks.
7. CHECK HEATER HOSE TEMPERATURES
1. Start engine and warm it up to normal operating temperature.
2. Touch both the inlet and outlet heater hoses.
Is the inlet hose hot and the outlet hose warm? YES or NO
YES >> GO TO 8.
NO >> Both hoses warm: GO TO 9.

TROUBLE DIAGNOSIS
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8. CHECK ENGINE COOLANT TEMPERATURE SENSOR
Check engine control temperature sensor. Refer to EC-200, "
DTC P0117, P0118 ECT SENSOR" .
OK or NG
OK >> System OK.
NG >> Repair or replace as necessary. Retest.
9. CHECK HEATER HOSES
Check heater hoses for proper installation.
OK or NG
OK >> GO TO 10.
NG >> Repair /replace as necessary. Retest GO TO 7.
10. BACK FLUSH HEATER CORE
1. Back flush heater core.
2. Drain the water from the system.
3. Refill system with new engine coolant. Refer to CO-8, "
Changing Engine Coolant" .
4. Start engine and warm it up to normal operating temperature.
5. Touch both the inlet and outlet heater hoses.
Is the inlet hose hot and the outlet hose warm? YES or NO
YES >> System OK.
NO >> Replace heater core and refill engine coolant. Refer to MTC-73, "
HEATER CORE" .

MTC-64
A/C UNIT ASSEMBLY
Revision: June 20062007 Versa
A/C UNIT ASSEMBLYPFP:27110
Removal and InstallationEJS00583
REMOVAL
1. Use a recovery/recycling equipment (for HFC-134a) to discharge refrigerant.
2. Drain coolant from cooling system. Refer to CO-8, "
Changing Engine Coolant" .
3. Remove cowl top cover. Refer to EI-20, "
COWL TOP" .
4. Remove lower dash insulator.
5. Remove bolt (A), and then disconnect low-pressure flexible
hose (1) and high-pressure pipe (2) from evaporator.
CAUTION:
Cap or wrap the joint of the pipe with suitable material such
as vinyl tape to avoid the entry of air.
6. Remove clamps (A), and then disconnect heater hoses (1) from
heater core.
7. Remove console box assembly. Refer to IP-10, "
INSTRUMENT PANEL ASSEMBLY" .
A. A/C unit assembly bolts B. Steering member bolts C. Steering column nuts
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SJIA0644E
SJIA0645E

A/C UNIT ASSEMBLY
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8. Remove instrument stay nuts (A) and harness clamps (B), and
then remove instrument stay (1).
9. Disconnect thermo control amp. connector (1).
10. Remove instrument panel and pad. Refer to IP-10, "
INSTRUMENT PANEL ASSEMBLY" .
11. Remove side ventilator ducts. Refer to MTC-77, "
Removal" .
12. Remove center ventilator ducts. Refer to MTC-78, "
Removal" .
13. Remove side kicking plates. Refer to EI-32, "
BODY SIDE TRIM" .
14. Disconnect the fuel filler door cable and the rear hatch door cable.
15. Remove A/C unit assembly bolts, steering member bolts, steering column nuts and harness clips.
16. Remove steering member, and then remove A/C unit assembly.
INSTALLATION
Installation is in the reverse order of removal.

When filling radiator with coolant, refer to CO-8, "Changing Engine Coolant" .

Recharge the refrigerant.
CAUTION:

Replace O-rings for A/C piping with new ones, and apply compressor oil when installing.

When recharging refrigerant, check for leaks.
SJIA0646E
SJIA0647E
A/C unit assembly bolt : 6.9 N·m (0.7 kg-m, 61 in-lb)
Steering member bolt : 12 N·m (1.25 kg-m, 9 ft-lb)
Steering column nut : Refer to PS-9, "
STEERING COLUMN" .

PG-48
HARNESS
Revision: June 20062007 Versa
B4 F1 B/3 : Generator E4 F39 — : Fusible link box (battery)
B5 F2 — : Generator E4 F40 — : Fusible link box (battery)
B5 F3 B/1 : A/C compressor E2 F41 GR/2 : Vehicle speed sensor
B4 F4 — : Generator F5 F45 GR/3 : Turbine revolution sensor
A4 F5 — : Generator ground E5 F46 GR/22 : CVT unit
E3 F6 GR/2 : Engine coolant temperature sensor E5 F47 B/3 : Powertrain revolution sensor (with A/T)
D2 F7 B/6 : Electric throttle control actuator E3 F48 B/3 : Secondary speed sensor (with M/T)
G4 F8 SMJ : To E8
B4 F9 — : Engine ground
G2 F10 GR/32 : ECM
G2 F11 BR/48 : ECM
D3 F12 GR/4 : Air fuel ratio (A/F) sensor 1
E2 F13 B/4 : Heated oxygen sensor 2
C4 F14 B/2 : Knock sensor
D3 F15 B/3 : Crankshaft position sensor (POS)
C4 F16 — : Engine ground
B4 F17 GR/2 : Fuel injector No. 1
C4 F18 GR/2 : Fuel injector No. 2
C4 F19 GR/2 : Fuel injector No. 3
D4 F20 GR/2 : Fuel injector No. 4
D4 F21 B/3 : Camshaft position sensor (PHASE)
C3 F22 GR/2: EVAP canister purge volume control
solenoid valve
B3 F23 GR/2: Intake valve timing control solenoid
valve
E5 F24 G/3: Park/neutral position (PNP) switch
(with M/T)
F5 F25 B/10: Park/neutral position (PNP) switch
(with A/T)
C3 F26 W/2 : Condenser-2
C5 F27 — : Starter motor
C5 F28 — : Starter motor
F5 F30 B/8 : Terminal cord assembly
F2 F31 B/6 : Mass air flow sensor
C5 F32 GR/1 : Oil pressure switch
F5 F33 GR/6 : To E19
C3 F34 GR/3: Ignition coil No. 1 (with power tran-
sistor)
C3 F35 GR/3: Ignition coil No. 2 (with power tran-
sistor)
C3 F36 GR/3: Ignition coil No. 3 (with power tran-
sistor)
C3 F37 GR/3: Ignition coil No. 4 (with power tran-
sistor)
E5 F38 BR/3 : Revolution sensor