Owner's Manual

TROUBLE DIAGNOSIS
MTC-67
C
D
E
F
G
H
I
K
L
M
A
B
MTC
Revision: March 2005 2005 Altima
PERFORMANCE CHART
Test Condition
Testing must be performed as follows:
Test Reading
Recirculating-to-discharge Air Temperature Table
Ambient Air Temperature-to-operating Pressure Table
TROUBLE DIAGNOSIS FOR ABNORMAL PRESSURE
Whenever system's high and/or low side pressure is abnormal, diagnose using a manifold gauge. The marker
above the gauge scale in the following tables indicates the standard (normal) pressure range. Since the stan-
dard (normal) pressure differs from vehicle to vehicle, refer to Ambient Air Temperature-to-operating Pressure
Table above.
Vehicle location Indoors or in the shade (in a well-ventilated place)
Doors Closed
Door windows Open
Hood Open
TEMP. Max. COLD
Mode switch
(Ventilation) set
Intake switch
(Recirculation) set
(blower) speed
Max. speed set
Engine speed Idle speed
Operate the air conditioning system for 10 minutes before taking measurements.
Inside air (Recirculating air) at blower assembly inlet
Discharge air temperature at center ventilator
°C (°F)
Relative humidity
%
Air temperature
°C (°F)
50 - 60
25 (77) 10.0 - 12.3 (50 - 54)
30 (86) 13.2 - 15.3 (56 - 60)
35 (95) 17.2 - 21.0 (63 - 70)
60 - 70
25 (77) 12.3 - 14.9 (54 - 59)
30 (86) 15.3 - 19.3 (60 - 67)
35 (95) 21.0 - 24.4 (70 - 76)
Ambient air
High-pressure (Discharge side)
kPa (kg/cm2, psi)
Low-pressure (Suction side)
kPa (kg/cm2, psi)
Relative humidity
%
Air temperature
°C (°F)
50 - 70
30 (86)
1,220 - 1,500
(12.44 - 15.30, 176.9 - 217.5)
240 - 295
(2.45 - 3.01, 34.8 - 42.8)
35 (95)
1,360 - 1,690
(13.87 - 17.24, 197.2 - 245.1)
275 - 335
(2.81 - 3.42, 39.9 - 48.6)
40 (104)
1,500 - 1,830
(12.44 - 18.67, 176.9 - 265.4)
310 - 375
(3.16 - 3.83, 45.0 - 54.4)