2007 NISSAN LATIO Therm

MTC-56
TROUBLE DIAGNOSIS
Revision: June 20062007 Versa
High-pressure Side is Too Low and Low-pressure Side is Too High
Both High- and Low-pressure Sides are Too Low
Gauge indication Refrigerant cycle Probable cause Corrective action
High-pressure side is too low
and low-pressure side is too
high.High- and low-pressure sides
become equal soon after com-
pressor operation stops.Compressor pressure operation
is improper.
↓
Damaged inside compressor
packings.Replace compressor.
No temperature difference
between high- and low-pres-
sure sides.Compressor pressure operation
is improper.
↓
Damaged inside compressor
packings.Replace compressor.
AC356A
Gauge indication Refrigerant cycle Probable cause Corrective action
Both high- and low-pressure
sides are too low.

There is a big temperature
difference between liquid tank
outlet and inlet. Outlet tem-
perature is extremely low.

Liquid tank inlet and expan-
sion valve are frosted.Liquid tank inside is slightly
clogged.

Replace liquid tank.

Check oil for contamination.

Temperature of expansion
valve inlet is extremely low as
compared with areas near liq-
uid tank.

Expansion valve inlet may be
frosted.

Temperature difference
occurs somewhere in high-
pressure side.High-pressure pipe located
between liquid tank and expan-
sion valve is clogged.

Check and repair malfunc-
tioning parts.

Check oil for contamination.
Expansion valve and liquid tank
are warm or only cool when
touched.Low refrigerant charge.
↓
Leaking fittings or componentsCheck refrigerant for leaks.
Refer to MTC-92, "
Checking
for Refrigerant Leaks" .
There is a big temperature dif-
ference between expansion
valve inlet and outlet while the
valve itself is frosted.Expansion valve closes a little
compared with the specifica-
tion.
↓
1. Improper expansion valve
adjustment.
2. Malfunctioning expansion
valve.
3. Outlet and inlet may be
clogged.

Remove foreign particles by
using compressed air.

Replace expansion valve.

Check oil for contamination.
An area of the low-pressure
pipe is colder than areas near
the evaporator outlet.Low-pressure pipe is clogged or
crushed.

Check and repair malfunc-
tioning parts.

Check oil for contamination.
Air flow volume is not enough or
is too low.Evaporator is frozen.

Check thermo control amp.
Refer to MTC-41, "
Magnet
Clutch Circuit (If Equipped)"
.

Replace compressor.

Repair evaporator fins.

Replace evaporator.

Refer to MTC-37, "Blower
Motor Circuit" .
AC353A

THERMO CONTROL AMPLIFIER
MTC-63
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MTC
Revision: June 20062007 Versa
THERMO CONTROL AMPLIFIERPFP:27675
Removal and InstallationEJS00582
REMOVAL
1. Remove evaporator. Refer to MTC-90, "Removal and Installation of Evaporator" .
CAUTION:
Cap or wrap the joint of the pipe with suitable material such as vinyl tape to avoid the entry of air.
2. Remove thermo control amp. (1) from evaporator (2).
INSTALLATION
Installation is in the reverse order of removal.
CAUTION:

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

Mark the mounting position of thermo control amp.

When recharging refrigerant, check for leaks.
ZJIA0798J

A/C UNIT ASSEMBLY
MTC-65
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MTC
Revision: June 20062007 Versa
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" .

MTC-66
A/C UNIT ASSEMBLY
Revision: June 20062007 Versa
Disassembly and AssemblyEJS00584
1. Blower case (right) 2. Foot duct (right) 3. Blower motor
4. Sub ventilator·defroster door lever 5. Sub ventilator·defroster door rod 6. Ventilator·defroster door lever
7. Ventilator·defroster door rod 8. Intake door lever 9. Ventilator·defroster door link
10. Main link 11. Thermo control amp. (TYPE 1*) 12. Heater pipe packing
13. Lower blower case 14. Heater pipe cover 15. Heater pipe clip
16. Intake door link 17. Blower fan resistor 18. Intake case (left)
19. Center defroster duct 20. Blower case (left) 21. Cover
22. Cover 23. Expansion valve cover 24. Foot door lever
25. Foot door link 26. Expansion valve 27. Air conditioner filter
28. Evaporator cover 29. Heater core 30. Spring
31. Water valve rod 32. Air mix door lever 33. Intake door
34. Intake case (right) 35. Foot duct (left) 36. Ventilator·defroster door
SJIA1515E

MTC-90
REFRIGERANT LINES
Revision: June 20062007 Versa
Removal and Installation of EvaporatorEJS0058M
REMOVAL
1. Remove A/C unit assembly. Refer to MTC-64, "A/C UNIT ASSEMBLY" .
CAUTION:
Cap or wrap the joint of the pipe with suitable material such as vinyl tape to avoid the entry of air.
2. Remove air conditioner filter. Refer to MTC-74, "
AIR CONDITIONER FILTER" .
3. Remove foot duct (right). Refer to MTC-78, "
Removal" .
4. Remove screws (A), and then remove expansion valve cover
(1).
5. Remove screws (A), and then remove evaporator cover (1).
6. Remove evaporator (1) with lower blower case (2) from A/C unit
assembly.
7. Remove thermo control amp. (3) from evaporator (1).
8. Remove evaporator (1) from lower blower case (2).
INSTALLATION
Installation is in the reverse order of removal.
CAUTION:

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

Mark the position of the thermo control amp.

When recharging refrigerant, check for leaks.
SJIA0673E
SJIA0674E
SJIA0599J

PG-16
POWER SUPPLY ROUTING CIRCUIT
Revision: June 20062007 Versa
Fuse EKS00I5I

If fuse is blown, be sure to eliminate cause of malfunction before
installing new fuse.

Use fuse of specified rating. Never use fuse of more than speci-
fied rating.

Do not partially install fuse; always insert it into fuse holder prop-
erly.

Remove fuse for “ELECTRICAL PARTS (BAT)” if vehicle is not
used for a long period of time.
Fusible Link EKS00I5J
A melted fusible link can be detected either by visual inspection or by
feeling with finger tip. If its condition is questionable, use circuit
tester or test lamp.
CAUTION:

If fusible link should melt, it is possible that critical circuit
(power supply or large current carrying circuit) is shorted.
In such a case, carefully check and eliminate cause of mal-
function.

Never wrap outside of fusible link with vinyl tape. Important:
Never let fusible link touch any other wiring harness, vinyl
or rubber parts.
Circuit Breaker (Built Into BCM)EKS00JLI
For example, when current is 30A, the circuit is broken within 8 to 20
seconds.
A circuit breaker is used for the following systems:

Power windows

Power sunroof
Circuit Breaker EKS00I5K
The PTC thermistor generates heat in response to current flow. The
temperature (and resistance) of the thermistor element varies with
current flow. Excessive current flow will cause the element's temper-
ature to rise. When the temperature reaches a specified level, the
electrical resistance will rise sharply to control the circuit current.
Reduced current flow will cause the element to cool. Resistance falls
accordingly and normal circuit current flow is allowed to resume.
CEL083
LKIA0830E
SBF 2 84 E
SEL109W

PG-42
HARNESS
Revision: June 20062007 Versa
G1 M1 W/16 : To R1 G1 M47 BR/2 : Front tweeter RH
B3 M2 B/5 : Passenger select unlock relay B2 M48 L/4 : Heated mirror relay
B2 M3 W/1 : Fuse block (J/B) E2 M52 W/40 : Intelligent key unit
B3 M4 W/1 : Fuse block (J/B) B2 M53 W/16 : EPS control unit
B3 M5 W/3 : Illumination control switch B3 M54 B/2 : EPS control unit
C2 M6 W/4 : Steering lock solenoid C3 M55 W/4 : Hazard switch
B3 M7 W/16 : Door mirror remote control switch B2 M57 — : Body ground
A3 M8 W/16 : To D2 F2 M59 W/2 : Glove box lamp
A3 M9 W/16 : To D1 C1 M60 L/2 : EPS control unit
E2 M10 GR/2 : Instrument panel antenna F1 M61 — : Body ground
G3 M11 W/4 : To B106 E2 M62 W/2 : Front blower motor
G4 M12 W/16 : To B101 C1 M63 W/4 : Torque sensor
G3 M13 W/24 : To B102 A2 M69 SMJ : To E7
G3 M14 W/24 : To B120 G3 M74 W/12 : To D102
B4 M15 W/16 : To B23 G3 M75 W/12 : To D101
B4 M16 W/24 : To B24 F2 M77 Y/4 : Front passenger air bag module
D5 M17 B/1 : Parking brake switch A2 M78 B/2 : To E11
F2 M18 W/40 : BCM (body control module) B1 M79 — : Body ground
F2 M19 W/15 : BCM (body control module) D3 M150 W/4 : To M32
F3 M20 B/15 : BCM (body control module) C3 M151 W/4 : Front blower motor resistor
C2 M21 W/4 : NATS antenna amp.
B3 M22 W/16 : Data link connector
E3 M23 W/4 : Remote keyless entry receiver
C1 M24 W/40 : Combination meter
C3 M25 /2 : Diode-1
B2 M26 W/6 : Ignition switch
C2 M27 GR/6 : Key switch and key lock solenoid
C2 M28 W/16 : Combination switch
C3 M29 Y/6 : Combination switch (spiral cable)
C3 M30 GR/8 : Combination switch (spiral cable)
E3 M32 W/4 : To M150
D2 M33 B/15 : Front air control
D4 M35 Y/28 : Air bag diagnosis sensor unit
D2 M36 W/3 : Front passenger air bag OFF indicator
D4 M38 W/6 : A/T device
D4 M38 W/6 : CVT device (without intelligent key)
D4 M38 W/8 : CVT device (with intelligent key)
B3 M39 W/2 : Tire pressure warning check connector
D2 M41 W/2 : Defrost A/C switch
D3 M42 W/3 : Thermo control amp.
D2 M43 W/20 : Audio unit
D2 M44 W/16 : Audio unit
D2 M45 W/12 : Audio unit
A1 M46 BR/2 : Front tweeter LH

BATTERY
SC-5
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Revision: June 20062007 Versa

Remove the cell plug using a suitable tool.

Add distilled water up to the MAX level.
Sulfation
A battery will be completely discharged if it is left unattended
for a long time and the specific gravity will become less than
1.100. This may result in sulfation on the cell plates.
To determine if a battery has been sulfated, note its voltage and
current when charging it. Less current and higher voltage are
observed in the initial stage of charging sulfated batteries, as
shown.
A sulfated battery may sometimes be brought back into service
by means of a long, slow charge, 12 hours or more, followed by
a battery capacity test.
SPECIFIC GRAVITY CHECK
1. Read hydrometer and thermometer indications at eye level.
2. Use the following chart to correct your hydrometer reading
according to electrolyte temperature.
Hydrometer Temperature Correction
MEL043F
WKIA4166E
MEL0 42 FA
Battery electrolyte temperature °C (°F) Add to specific gravity reading
71 (160) 0.032
66 (150) 0.028
60 (140) 0.024
54 (130) 0.020
49 (120) 0.016
43 (110) 0.012
38 (100) 0.008
32 (90) 0.004
27 (80) 0
21 (70)−0.004
16 (60)−0.008
10 (50)−0.012
4 (40)−0.016
−1 (30)−0.020
−7 (20)−0.024