2007 NISSAN TIIDA Evaporator

INSUFFICIENT COOLING
HAC-305
< SYMPTOM DIAGNOSIS >[AUTO AIR CONDITIONER (W/NAVI)]
C
D
E
F
G
H
J
K
L
MA
B
HAC
N
O
P Both High- and Low-pressure Sides are Too Low
Low-pressure Side Sometimes Becomes Negative
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 be-
tween high- and low-pressure
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 dif-
ference 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 oc-
curs somewhere in high-pres-
sure side.High-pressure pipe located be-
tween liquid tank and expansion
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 HA-22, "
Checking of
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 specification.
↓
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 intake sensor circuit.
Refer to HAC-229, "
Intake
Door Motor Component
Function Check".
 Replace compressor.
 Repair evaporator fins.
 Replace evaporator.
 Refer to HAC-233, "
Front
Blower Motor Component
Function Check".
AC353A

VTL-1
VENTILATION, HEATER & AIR CONDITIONER
C
D
E
F
G
H
J
K
L
M
SECTION VTL
A
B
VTL
N
O
P
CONTENTS
VENTILATION SYSTEM
AUTOMATIC AIR CONDITIONER
PRECAUTION ...............................................
3
PRECAUTIONS ...................................................3
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ...................................................................
3
Precaution for Working with HFC-134a (R-134a) ......3
PREPARATION ............................................4
PREPARATION ...................................................4
Commercial Service Tool ..........................................4
FUNCTION DIAGNOSIS ...............................5
AIR CONDITIONER FILTER ...............................5
Description ................................................................5
ON-VEHICLE MAINTENANCE .....................6
AIR CONDITIONER FILTER ...............................6
Removal and Installation ...........................................6
ON-VEHICLE REPAIR ..................................7
CONTROLLER ....................................................7
Removal and Installation ...........................................7
Disassembly and Assembly ......................................7
IN-VEHICLE SENSOR ........................................9
Removal and Installation ...........................................9
SUNLOAD SENSOR ..........................................10
Removal and Installation .........................................10
INTAKE SENSOR ..............................................11
Removal and Installation .........................................11
A/C UNIT ASSEMBLY .......................................12
Removal and Installation .........................................12
Disassembly and Assembly ....................................14
EVAPORATOR .................................................16
Removal and Installation .........................................16
HEATER CORE .................................................17
Removal and Installation .........................................17
BLOWER MOTOR ............................................18
Removal and Installation .........................................18
FAN CONTROL AMPLIFIER ............................19
Removal and Installation .........................................19
INTAKE DOOR MOTOR ...................................20
Removal and Installation .........................................20
AIR MIX DOOR MOTOR ...................................21
Removal and Installation .........................................21
MODE DOOR MOTOR ......................................22
Removal and Installation .........................................22
DUCTS AND GRILLES .....................................23
Removal and Installation .........................................23
PTC HEATER ....................................................28
Removal and Installation of PTC Control Unit .........28
Removal and Installation of PTC Heater .................28
Removal and Installation of Water Temperature
Sensor .....................................................................
28
MANUAL AIR CONDITIONER
PRECAUTION ..............................................
30
PRECAUTIONS .................................................30
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" .................................................................
30
Precaution for Working with HFC-134a (R-134a) ....30
PREPARATION ...........................................31
PREPARATION .................................................31
Commercial Service Tool ........................................31

VTL-2
FUNCTION DIAGNOSIS .............................32
AIR CONDITIONER FILTER .............................32
Description ..............................................................32
ON-VEHICLE MAINTENANCE ...................33
AIR CONDITIONER FILTER .............................33
Removal and Installation ........................................33
ON-VEHICLE REPAIR ................................34
CONTROLLER ..................................................34
Removal and Installation ........................................34
Disassembly and Assembly ....................................35
INTAKE SENSOR ..............................................36
Removal and Installation ........................................36
A/C UNIT ASSEMBLY .......................................37
Removal and Installation ........................................37
Disassembly and Assembly ....................................39
EVAPORATOR ..................................................41
Removal and Installation of Evaporator ..................41
HEATER CORE .................................................42
Removal and Installation .........................................42
BLOWER MOTOR .............................................43
Removal and Installation .........................................43
BLOWER FAN RESISTOR ...............................44
Removal and Installation .........................................44
INTAKE DOOR ..................................................45
Intake Door Cable Adjustment ................................45
AIR MIX DOOR ..................................................46
Air Mix Door Cable Adjustment ...............................46
MODE DOOR .....................................................47
Mode Door Cable Adjustment .................................47
DUCTS AND GRILLES .....................................48
Removal and Installation .........................................48
PTC HEATER ....................................................53
Removal and Installation of PTC Control Unit ........53
Removal and Installation of PTC Heater .................53
Removal and Installation of Water Temperature
Sensor .....................................................................
53

AIR CONDITIONER FILTER
VTL-5
< FUNCTION DIAGNOSIS >[AUTOMATIC AIR CONDITIONER]
C
D
E
F
G
H
J
K
L
MA
B
VTL
N
O
P
FUNCTION DIAGNOSIS
AIR CONDITIONER FILTER
DescriptionINFOID:0000000001696277
FUNCTION
The fresh air (A) and the recirculated air (B) drawn inside the pas-
senger compartment by the front blower motor (1) is kept clean (C)
on either mode by the air conditioner filter (2), located before the
evaporator (3), in the A/C unit assembly.
WJIA2253E

INTAKE SENSOR
VTL-11
< ON-VEHICLE REPAIR >[AUTOMATIC AIR CONDITIONER]
C
D
E
F
G
H
J
K
L
MA
B
VTL
N
O
P
INTAKE SENSOR
Removal and InstallationINFOID:0000000001696284
REMOVAL
1. Remove the evaporator. Refer to VTL-16, "Removal and Installation".
CAUTION:
Cap or wrap the joint of the pipe with suitable material such as vinyl tape to avoid the entry of air.
2. Remove the intake sensor (1) from the evaporator (2).
CAUTION:
Mark the position of intake sensor on the evaporator for
installation.
INSTALLATION
Installation is in the reverse order of removal.
CAUTION:
 Replace O-rings for A/C piping with new ones, and then apply compressor oil to it when installing it.
 Install the intake sensor in the same position as the original intake sensor.
 When recharging refrigerant, check for leaks.
ZJIA0798J

VTL-12
< ON-VEHICLE REPAIR >[AUTOMATIC AIR CONDITIONER]
A/C UNIT ASSEMBLY
A/C UNIT ASSEMBLY
Removal and InstallationINFOID:0000000001696285
NOTE:
A LHD model shown, RHD model similar.
REMOVAL
1. Use the recovery/recycling equipment (for HFC-134a) to discharge the refrigerant. Refer to HA-29, "HFC-
134a (R-134a) Service Procedure".
2. Drain the coolant from the cooling system. Refer to CO-11, "
Changing Engine Coolant" (HR16DE), CO-
35, "Changing Engine Coolant" (MR18DE), CO-58, "Draining" (K9K).
3. Remove cowl top cover. Refer to EXT-20, "
Removal and Installation".
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.
SJIA0648E
A. A/C unit assembly bolts B. Steering member bolts C. Steering column nuts
SJIA0644E
SJIA0645E

A/C UNIT ASSEMBLY
VTL-15
< ON-VEHICLE REPAIR >[AUTOMATIC AIR CONDITIONER]
C
D
E
F
G
H
J
K
L
MA
B
VTL
N
O
P
CAUTION:
After installing door motor, perform door motor starting position reset by following self-diagnosis
STEP-3. Refer to HAC-213, "
Front Air Control Self-Diagnosis".
25. Intake case (left) 26. Center defroster duct 27. Air mix door motor
28. Air mix door rod 29. Blower case (left) 30. Aspirator
31. Cover 32. Cover 33. Cooling hose
34. Expansion valve cover 35. Foot door lever 36. Foot door link
37. Expansion valve 38. Bolt 39. Air conditioner filter
40. Evaporator cover 41. Heater core 42. Spring
43. Air mix door lever 44. Water valve rod 45. Intake door
46. Intake case (right) 47. Foot duct (left) 48. Ventilator·defroster door
49. Foot door 50. Air mix door 51. Seal
52. Expansion valve grommet 53. O-ring 54. Evaporator
55. Bolt 56. Cooler pipe assembly 57. Water temperature sensor
58. Full hot switch 59. PTC heater 60. PTC control unit

VTL-16
< ON-VEHICLE REPAIR >[AUTOMATIC AIR CONDITIONER]
EVAPORATOR
EVAPORATOR
Removal and InstallationINFOID:0000000001696371
REMOVAL
1. Remove the A/C unit assembly. Refer to VTL-12, "Removal and Installation".
CAUTION:
Cap or wrap the joint of the pipe with suitable material such as vinyl tape to avoid the entry of air.
2. Remove the air conditioner filter.
3. Remove foot duct (right). Refer to VTL-23, "
Removal and Installation".
4. Remove screws (A), and then remove expansion valve cover
(1).
NOTE:
Manual A/C system shown, automatic A/C system similar.
5. Remove screws (A), and then remove evaporator cover (1).
NOTE:
Manual A/C system shown, automatic A/C system similar.
6. Remove the evaporator (1) with lower blower case (2) from the
A/C unit assembly.
7. Remove the intake sensor (3) from the evaporator (1).
CAUTION:
Note the position of the intake sensor on the evaporator for
installation.
8. Remove the evaporator (1) from the 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 then apply compressor oil to it when installing it.
 Install the intake sensor in the same position on the evaporator.
 When recharging refrigerant, check for leaks.
SJIA0673E
SJIA0674E
SJIA0599J