2002 NISSAN TERRANO Service Repair Manual

Compressor Clutch
REMOVAL
IWhen removing center bolt, hold clutch disc with clutch disc
wrench.
IRemove the drive plate using the drive plate puller.
Insert the holder's three pins into the holes in the drive plate,
and rotate the holder clockwise to hook it onto the plate. Then,
tighten the center bolt to remove the drive plate.
When tightening the center bolt, insert a round bar (screwdriver,
etc.) between two of the pins (as shown in the left-hand figure)
to prevent drive plate rotation. After removing the drive plate,
remove the shims from either the drive shaft or the drive plate.
YHA403
RHA070C
RHA071C
COMPRESSOR Ð Model DKV-14C (ZEXEL make)
HA-24

IRemove the snap ring using external snap ring pliers.
IPulley removal
Position the center pulley puller on the end of the drive shaft,
and remove the pulley assembly using any commercially avail-
able pulley puller.
For pressed pulleys:
To prevent deformation of the pulley groove, the puller
claws should be hooked into (not under) the pulley groove.
For machine latched pulleys:
Align the pulley puller groove with the pulley groove, and
then remove the pulley assembly.
IRemove the field coil harness clip using a screwdriver.
IRemove the three field coil fixing screws and remove the field
coil.
INSPECTION
Clutch disc:If the contact surface shows signs of damage due to
excessive heat, the clutch disc and pulley should be replaced.
Pulley:Check the appearance of the pulley assembly. If the con-
tact surface of the pulley shows signs of excessive grooving due
to slippage, both the pulley and clutch disc should be replaced. The
contact surfaces of the pulley assembly should be cleaned with a
suitable solvent before reinstallation.
Coil:Check coil for loose connection or cracked insulation.
INSTALLATION
IInstall the field coil.
Be sure to align the coil's pin with the hole in the compres-
sor's front head.
IInstall the field coil harness clip using a screwdriver.
RHA072C
RHA073C
RHA074C
RHA075C
RHA076C
COMPRESSOR Ð Model DKV-14C (ZEXEL make)
Compressor Clutch (Cont'd)
HA-25

IInstall the pulley assembly using the installer and a hand press,
and then install the snap ring using snap ring pliers.
IInstall the drive plate on the drive shaft, together with the origi-
nal shim(s). Press the drive plate down by hand.
IUsing the holder to prevent drive plate rotation, tighten the bolt
to 12 to 15 N×m (1.2 to 1.5 kg-m, 9 to 11 ft-lb) torque.
After tightening the bolt, check that the pulley rotates
smoothly.
ICheck clearance around the entire periphery of clutch disc.
Disc-to-pulley clearance:
0.3 - 0.6 mm (0.012 - 0.024 in)
If the specified clearance is not obtained, replace adjusting
spacer and readjust.
BREAK-IN OPERATION
When replacing compressor clutch assembly, do not forget break-in
operation, accomplished by engaging and disengaging the clutch
about thirty times. Break-in operation raises the level of transmit-
ted torque.
RHA077C
RHA078C
RHA079C
RHA080C
COMPRESSOR Ð Model DKV-14C (ZEXEL make)
Compressor Clutch (Cont'd)
HA-26

How to Perform Trouble Diagnoses for Quick
and Accurate Repair
WORK FLOW
CHECK INFReference item
LISTEN TO CUSTOMER COMPLAINT AND CON-
FIRM BY PERFORMING OPERATIONAL CHECK.
Can be
confirmedCannot be
confirmed
EDUCATE CUSTOMER ON
CORRECT OPERATION OF
SYSTEM.
LISTEN TO CUSTOMER COMPLAINTS AND
CONFIRM.FSymptom Chart
(See page HA-36.)
INVESTIGATE ITEMS YOU SHOULD CARRY
OUT RELATED TO EACH SYMPTOM.FSymptom Chart
(See page HA-36.)
EELIMINATE GOOD SYSTEM(S)/PART(S).FPreliminary Check
(See pages HA-37.)
CHECK MAIN POWER SUPPLY AND GROUND
CIRCUITS.FMain Power Supply and Ground Circuit
Check
(See page HA-51.)
Diagnostic
Procedure(s)
(See pages HA-52 -
54.)EELIMINATE GOOD PART(S)/HARNESS(ES)/
CONNECTOR(S) ELECTRICALLY.FHarness Layout for A/C System
(See page HA-39.)
Malfunctioning
harness(es)/
connector(s)Malfunctioning
part(s)
INSPECT EACH
COMPONENT.
FElectrical Components Inspection
(See page HA-60.)
REPAIR.
H
REPAIR/REPLACE.
NG
FINAL CHECK
OK
CHECK OUT
H
H
H
H
H
H
H
H
HH
H
H
DIAGNOSES Ð Overall System
HA-27

Operation Check
The purpose of the operational check is to confirm that the system
is as it should be. The systems which will be checked are the
blower, mode (discharge air), intake air, temperature decrease,
temperature increase and A/C switch system.
CONDITIONS:
Engine running and at normal operating temperature.
PROCEDURE:
1. Check blower
1) Turn FAN CONTROL DIAL to 1.
Blower should operate at speed 1.
2) Then turn the DIAL to speed 2.
3) Continue checking blower speed until all speeds are checked.
4) Leave blower on speed 4.
2. Check discharge air
1) Turn AIR CONTROL DIAL toposition.
2) Confirm that all discharge air comes out of face vents.
3) Turn AIR CONTROL DIAL to
position.
4) Confirm that discharge air comes out of face vents and foot
vents.
5) Turn AIR CONTROL DIAL to
position.
6) Confirm that discharge air comes out of foot vents, with some
air from face vents.
7) Turn AIR CONTROL DIAL to
position.
8) Confirm that discharge air comes out of foot vents with some
air from defroster vents.
9) Turn AIR CONTROL DIAL to
position.
10) Confirm that all discharge air comes out of defroster vents, with
some air from face vents.
3. Check recirculation
1) Switch AIR RECIRCULATION SWITCH to ON position (Indica-
tor light ON).
2) Listen for intake door position change (you should hear sound
change slightly).
NHA333
NHA334
RHA035E
NHA335
DIAGNOSES Ð Overall System
HA-28

4. Check temperature decrease
1) Turn TEMPERATURE CONTROL DIAL to full cold (counter-
clockwise).
2) Check for cold air at discharge air outlets.
5. Check temperature increase
1) Turn TEMPERATURE CONTROL DIAL to full hot (clockwise).
2) Check for hot air at discharge air outlets.
6. Check A/C switch
Turn FAN CONTROL DIAL to the desired position (1 to 4) and
switch AIR CONDITIONER SWITCH to turn ON air conditioner.
Indicator light will come on when air conditioner is ON.
NHA336
NHA337
NHA338
DIAGNOSES Ð Overall System
Operation Check (Cont'd)
HA-29

Performance Chart
TEST CONDITION
Testing must be performed as follows:
Vehicle location: Indoors or in the shade (in a well-ventilated place)
Doors: Closed
Door window: Open (Front driver side only)
Hood: Open
TEMP. control lever position: Max. COLD
AIR control lever position:
(Ventilation)
INTAKE lever position:
(Recirculation)
FAN lever: 4
Engine speed: 1,500 rpm
Time required before starting testing
after air conditioner starts operating:More than 10 minutes
TEST READING
Recirculating-to-discharge air temperature table
Inside air (Recirculating air)
at blower assembly inlet
Discharge air temperature at center ventilator
ÉC (ÉF)
Relative humidity
%Air temperature
ÉC (ÉF)
40-6025 (77) 9.8 - 11.5 (50 - 53)
30 (86) 13.8 - 15.9 (57 - 61)
35 (95) 17.9 - 20.3 (64 - 69)
60-8025 (77) 11.5 - 13.3 (53 - 56)
30 (86) 15.9 - 18.0 (61 - 64)
35 (95) 20.3 - 22.7 (69 - 73)
Ambient air temperature-to-compressor pressure table
Ambient air
High-pressure (Discharge side)
kPa (bar, kg/cm
2, psi)Low-pressure (Suction side)
kPa (bar, kg/cm2, psi) Relative humidity
%Air temperature
ÉC (ÉF)
40-8025 (77)1,451 - 1,608 (14.51 - 16.08,
14.8 - 16.4, 210 - 233)157 - 186 (1.57 - 1.86, 1.6 - 1.9,
23 - 27)
30 (86)1,569 - 1,804 (15.69 - 18.04,
16.0 - 18.4, 228 - 262)176 - 235 (1.76 - 2.35, 1.8 - 2.4,
26 - 34)
35 (95)1,834 - 2,138 (18.34 - 21.38,
18.7 - 21.8, 266 - 310)226 - 304 (2.26 - 3.04, 2.3 - 3.1,
33 - 44)
DIAGNOSES Ð Overall System
HA-30

Performance Test Diagnoses
INSUFFICIENT COOLING
MHA176B
DIAGNOSES Ð Overall System
HA-31