NISSAN ALMERA TINO 2001 Service Repair Manual

4 CHECK POWER SUPPLY FOR A/C RELAY
Disconnect A/C relay.
Do approx. 12 volts exist between A/C relay harness terminal Nos. 1, 5 and body ground?
RHA635H
YesorNo
Ye s©GO TO 5.
No©Check power supply circuit and 10A (No. 15) fuse at fuse block. Refer to EL-10,“Wiring
Diagram—POWER—”.
5 CHECK A/C RELAY AFTER DISCONNECTING IT
Refer to HA-73.
OK or NG
OK©Reconnect A/C relay. GO TO 6.
NG©Replace A/C relay.
6 CHECK COIL SIDE CIRCUIT OF A/C RELAY
Do approx. 12 volts exist between ECM harness terminal No. 204 and body ground?
NHA429
YesorNo
Ye s©GO TO 8.
No©Disconnect A/C relay. Disconnect ECM harness connector. GO TO 7.
TROUBLE DIAGNOSES
Magnet Clutch (Cont’d)
HA-70

7 CHEC KCIRCUI TCONTINUIT YBETWEE NA/C REL AY AN DEC MHARNESS
NHA430
8 CHEC KVO LTAG EFO RECM
NHA431
9 CHEC KPOWE RSUPP LY FO RDUAL-PRESSUR ESWITCH
NHA432
Magne tClutc h(Cont ’d)

10 CHECK DUAL-PRESSURE SWITCH
Refer to HA-74.
OK or NG
OK©GO TO 11.
No©Replace dual-pressure switch.
11 CHECK CIRCUIT CONTINUITY BETWEEN DUAL-PRESSURE SWITCH AND HEATER CONTROL PANEL
(A/C SWITCH)
Check circuit continuity between dual-pressure switch harness terminal No. 1 and heater control panel harness terminal
No. 7.
NHA475
Continuity should exist.
If OK, check harness for short.
OK or NG
OK©GO TO 12.
NG©Repair harness or connector.
12 CHECK A/C SWITCH
Refer to HA-74.
OK or NG
OK©GO TO 13.
NG©Replace A/C switch.
13 CHECK HEATER CONTROL PANEL CIRCUIT
Check circuit continuity between heater control panel harness terminal No. 8 and No. 18.
NHA474
Continuity should exist.
If OK, check harness for short.
OK or NG
OK©GO TO 14.
NG©Repair harness or connector.
TROUBLE DIAGNOSES
Magnet Clutch (Cont’d)
HA-72

14 CHECK FAN SWITCH
Refer to HA-61.
OK or NG
OK©GO TO 15.
NG©Replace fan switch.
15 CHECK BODY GROUND CIRCUIT
Check circuit continuity between heater control panel harness terminal No. 13 and body ground.
NHA428
Continuity should exist.
If OK, check harness for short.
OK or NG
OK©INSPECTION END.
NG©Repair harness or connector.
RHA638H
ELECTRICAL COMPONENT INSPECTIONNLHA0192A/C RelayNLHA0192S01Check continuity between terminal Nos. 3 and 5.
Conditions Continuity
12V direct current supply between terminal Nos. 1 and 2 Yes
No current supply No
If NG, replace relay.
TROUBLE DIAGNOSES
Magnet Clutch (Cont’d)
HA-73

RHA639H
SHA315F
Refrigerant Pressure SensorNLHA0192S02Make sure that the A/C refrigerant pressure and the sensor output
voltage are within the specified range as shown in the A/C operat-
ing condition figure.
Check voltage between ECM harness terminal No. 74 and body
ground.
RHA715H
Dual-pressure SwitchNLHA0192S03
ON
kPa (bar, kg/cm2, psi)OFF
kPa (bar, kg/cm2, psi)
Low-pressure
sideIncreasing to 157 - 216 (1.57
- 2.16, 1.6 - 2.2, 23 - 31)Decreasing to 157 - 196 (1.57
- 1.96, 1.6 - 2.0, 23 - 28)
High-pressure
sideDecreasing to 1,863 - 2,256
(18.6 - 22.6, 19 - 23, 270 -
327)Increasing to 2,452 - 2,844
(24.5 - 28.4, 25 - 29, 356 -
412)
NHA388
A/C SwitchNLHA0192S04Check continuity between terminals.
A/C switch Terminals Continuity
ON1-7
Ye s
1-8
OFF1-7
No
1-8
TROUBLE DIAGNOSES
Magnet Clutch (Cont’d)
HA-74

InsufficientCooling
NHA390
Insufficien tCooling

PERFORMANCE TEST DIAGNOSESNLHA0149
SHA419F
*1: HA-78
*2: HA-78*3: HA-79 *4: HA-50
TROUBLE DIAGNOSES
Insufficient Cooling (Cont’d)
HA-76

SHA361FA
*1:—*2: HA-55 *3: EM-17 (QG), EM-86 (SR),
EM-166 (YD)
TROUBLE DIAGNOSES
Insufficient Cooling (Cont’d)
HA-77

PERFORMANCE CHART=NLHA0150Test ConditionNLHA0150S01Testing must be performed as follows:
Vehicle location: Indoors or in the shade (in a well-ventilated place)
Doors: Closed
Door window: Open
Hood: Open
TEMP.: Max. COLD
Discharge Air: Face Vent
REC switch: (Recirculation) set
FAN speed: High speed
Engine speed: Idle speed
Operate the air conditioning system for 10 minutes before taking
measurements.
Test ReadingNLHA0150S02Recirculating-to-discharge Air Temperature TableNLHA0150S0201
Inside air (Recirculating air) at blower assembly inlet
Discharge air temperature at center venti-
lator
°C(°F) Relative humidity
%Air temperature
°C(°F)
50-6020 (68) 6.0 - 8.8 (43 - 48)
25 (77) 9.5 - 12.8 (49 - 55)
30 (86) 14.1 - 17.7 (57 - 64)
60-7020 (68) 8.8 - 11.6 (48 - 53)
25 (77) 12.8 - 16.2 (55 - 61)
30 (86) 17.7 - 21.1 (64 - 70)
TROUBLE DIAGNOSES
Insufficient Cooling (Cont’d)
HA-78

Ambient Air Temperature-to-operating Pressure Table=NLHA0150S0202
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
°C(°F)
50-7020 (68)659 - 805
(6.590 - 8.052, 6.72 - 8.21,
95.6 - 116.7)171 - 214
(1.706 - 213.8, 1.74 - 2.18,
24.7 - 31.0)
25 (77)799 - 980
(7.993 - 9.797, 8.15 - 9.99,
115.9 - 142.1)185 - 220
(1.854 - 2.197, 1.89 - 2.24,
26.9 - 31.9)
30 (86)953 - 1,170
(9.532 - 11.700, 9.72 - 11.93,
138.2 - 169.6)199 - 240
(1.991 - 2.403, 2.03 - 2.45,
2.89 - 34.8)
35 (95)1,121 - 1,363
(11.209 - 13.632, 11.43 -
13.90, 162.5 - 197.7)228 - 282
(2.275 - 2.824, 2.32 - 2.88,
33.0 - 41.0)
40 (104)1,298 - 1,584
(12.984 - 15.838, 13.24 -
16.15, 188.3 - 229.7)273 - 333
(2.726 - 3.334, 2.78 - 34.0,
39.5 - 48.3)
TROUBLE DIAGNOSES FOR ABNORMAL PRESSURENLHA0151Whenever 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, however, differs from vehicle to vehicle, refer to HA-79 (“Ambient air temperature-to-
operating pressure table”).
TROUBLE DIAGNOSES
Insufficient Cooling (Cont’d)
HA-79