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10. Performance Test
1. VEHICLE SET UP
In order to obtain meaningful test results, the vehicle must
be set up to meet the following conditions:
1) Vehicle in shade
2) No wind
3) All vehicle doors closed
4) Front windows opened
5) Hood opened
6) Engine speed set at 1,500 rpm.
7) A/C ON
8) Temperature control lever—Maximum cold
9) Air source—Recirculation
10) Blower speed—4th position (High)
11) Operate A/C for 10 minutes (Minimum) before taking
measurement.
2. MEASUREMENTS
After 10 minutes (Minimum) of A/C operation and using
accurate test equipment, take the following measurements
(in order):
1) Evaporator intake air temperature at recirculation door.
2) Evaporator discharge air temperature at center grill.
3) Condenser (Ambient) intake air temperature measured
0.9 m (3 ft) in front and in line with the center of the con-
denser.
4) Suction (Low) side pressure
5) Discharge (High) side pressure
NOTE:
If only one thermometer is available; 1) take the ambient
measurement first; then 2) the intake air; and 3) dis-
charge air temperature.
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4-7SERVICE PROCEDURE
10. Performance Test
Page 890 of 2248
3. MEASUREMENT STANDARD BY VERSES
Compare temperature and pressure measurements with
the established standards shown in the following charts.
B4M0371A
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4-7SERVICE PROCEDURE
10. Performance Test
Page 891 of 2248
11. Compressor
Compressor is a swash plate type. When trouble occurs,
replace compressor as a single unit.
B4M0090
A: COMPRESSOR CLUTCH INSPECTION
Compressor clutch trouble is often caused by clutch slip-
page and noise. Check and take corrective measures, as
required.
1) Remove belt cover.
2) Check that clearance between drive plate and pulley
over the entire perimeter is within specifications.
Clearance:
0.3 — 0.6 mm (0.012 — 0.024 in)
B4M0091
3) Check that voltage applied to magnetic coil is at least
10.5 volts.
4) When noise is noted, check that it originates in either
compressor or pulley bearing.
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4-7SERVICE PROCEDURE
11. Compressor
Page 892 of 2248
B4M0092A
B: REMOVAL
1) Disconnect ground cable from battery.
2) Discharge refrigerant using refrigerant recovery system.
(1) Fully close low-pressure valve of manifold gauge.
(2) Connect low-pressure charging hose of manifold
gauge to low-pressure service valve.
(3) Open low-pressure manifold gauge valve slightly,
and slowly discharge refrigerant from system.
CAUTION:
Do not allow refrigerant to rush out. Otherwise, com-
pressor oil will be discharged along with refrigerant.
B4M0093A
3) Remove low-pressure hose1(Flexible hose Ps) and
high-pressure hose
2(Flexible hose Pd).
CAUTION:
Be careful not to lose O-ring of low-pressure hose.
Plug the opening to prevent foreign matter from
entering.
G4M0624
4) Remove compressor belt cover and alternator belt
cover.
Remove bolts which secure belt covers.
G4M0625
5) Remove alternator V-belt.
Loosen lock bolt on alternator bracket. Turn adjusting bolt
and remove V-belt.
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4-7SERVICE PROCEDURE
11. Compressor
Page 893 of 2248
G4M0626
6) Remove compressor V-belt.
Loosen lock nut on idler pulley. Turn adjusting bolt and
remove V-belt.
G4M0627
7) Disconnect alternator harness.
G4M0628
8) Disconnect compressor harness.
Disconnect compressor harness from body harness.
9) Lower bracket.
Remove bolts which secure lower compressor bracket.
G4M0629
10) Remove compressor.
Remove bolt which secure compressor. Remove compres-
sor from bracket.
G4M0630
C: INSTALLATION
1) Install compressor.
Install compressor on bracket.
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4-7SERVICE PROCEDURE
11. Compressor
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2) Connect compressor harness.
3) Connect alternator harness.
4) Install compressor V-belt (Rear).
After adjusting belt tension, tighten tension pulley lock nut
securely.
G4M0632
5) Install alternator V-belt.
After adjusting V-belt tension, tighten alternator bracket
lock bolt securely.
6) Check drive belt tension and adjust it if necessary by
changing alternator position and/or idler pulley position.
Pulley arrangement Tension mm (in)/98N (10 kg, 22 lb)
G4M0939
AB
*New belt:
7.0—9.0
(0.276—0.354)
Existing belt:
9.0—11.0
(0.354—0.433)*New belt:
7.5—8.5
(0.295—0.335)
Existing belt:
9.0—10.0
(0.354—0.394)
* When replacing belts with new ones, adjust tensions to
specification and then readjust to the same specification
after running engine for 5 minutes.
Figures in table refer to the number of grooves in pulleys.
C/P : Crankshaft pulley
ALT : Alternator pulley
P/S : Power steering oil pump pulley
A/C : Air conditioner compressor pulley
I/P : Idler pulley
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4-7SERVICE PROCEDURE
11. Compressor
Page 895 of 2248
G4M0634
CAUTION:
Ensure that the V-belt is aligned correctly. If it is not,
check for loose bolts.
The V-belt should not be too tight or too loose.
A belt which is too tight may break bearing or cause
gas to leak from the shaft seal. A belt which is too
loose slips, thereby causing the belt cut.
After completing the compressor installation and
testing the system operation, check and adjust the ten-
sion of both V-belts again.
G4M0635
7) Install high-pressure hose (Flexible hose Pd).
Connect high-pressure hose with compressor.
CAUTION:
Be sure to apply compressor oil to the periphery of
O-ring.
B4M0094A
8) Install low-pressure hose1(Flexible hose Ps).
Connect low-pressure hose with compressor.
CAUTION:
Be sure to apply compressor oil to the periphery of
O-ring.
9) Install belt cover.
10) Connect ground cable to negative terminal of battery.
11) Charge refrigerant.
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4-7SERVICE PROCEDURE
11. Compressor
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B4M0095
12. Condenser
A: REMOVAL AND INSTALLATION
1) Disconnect battery negative terminal.
2) Discharge refrigerant using refrigerant recovery system.
3) Remove front grille.
G2M0375
4) Remove canister from bracket.
CAUTION:
Do not disconnect hose from canister.
Insert air vent hose of canister into the hole on body.
B4M0096A
5) Remove the radiator upper bracket of both side.
6) Disconnect high-pressure hose
1and high-pressure
pipe
2from condenser.
B4M0097
7) Remove the two bolts which secure condenser. While
lifting condenser, remove it through space between radia-
tor and radiator panel.
B4M0098A
8) The condenser should be installed in the reverse order
in which it was removed.
When installing the condenser, pay attention to the follow-
ing:
CAUTION:
Before connecting the pipe, be sure to apply oil to the
periphery of O-ring.
36
4-7SERVICE PROCEDURE
12. Condenser