Page 2465 of 2898
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.
NHA490
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-67.
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.
NHA491
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-65
Page 2466 of 2898
14 CHECK FAN SWITCH
Refer to HA-54.
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.
RHA778H
Continuity should exist.
If OK, check harness for short.
OK or NG
OK©INSPECTION END.
NG©Repair harness or connector.
RHA638H
ELECTRICAL COMPONENT INSPECTIONNJHA0192A/C RelayNJHA0192S01Check 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-66
Page 2467 of 2898
RHA639H
SHA315FD
Refrigerant Pressure SensorNJHA0192S02Make 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 SwitchNJHA0192S03
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)
NHA492
A/C SwitchNJHA0192S04Check continuity between terminals.
A/C switch Terminals Continuity
For EuropeON1-7
Ye s
1-8
OFF1-7
No
1-8
TROUBLE DIAGNOSES
Magnet Clutch (Cont'd)
HA-67
Page 2468 of 2898
Insufficient Cooling
TROUBLE DIAGNOSIS PROCEDURE FOR INSUFFICIENT COOLING=NJHA0148SYMPTOM:
+Insufficient Cooling.
INSPECTION FLOW
NHA390
*1: HA-42
*2: HA-72
*3: HA-69*4: HA-34
*5: HA-33
*6: HA-83*7: EM-16 (QG),
EM-85 (YD)
*8: EC-406 (QG) Europe,
EC-730 (YD) Europe
TROUBLE DIAGNOSES
Insufficient Cooling
HA-68
Page 2469 of 2898
PERFORMANCE TEST DIAGNOSESNJHA0149
SHA419F
*1: HA-71
*2: HA-71*3: HA-72 *4: HA-43
TROUBLE DIAGNOSES
Insufficient Cooling (Cont'd)
HA-69
Page 2470 of 2898
SHA361FA
*1: HA-86 *2: HA-48 *3: EM-16 (QG),
EM-85 (YD)
TROUBLE DIAGNOSES
Insufficient Cooling (Cont'd)
HA-70
Page 2471 of 2898
PERFORMANCE CHART=NJHA0150Test ConditionNJHA0150S01Testing 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 ReadingNJHA0150S02Recirculating-to-discharge Air Temperature TableNJHA0150S0201
Inside air (Recirculating air) at blower assembly inlet
Discharge air temperature at center venti-
lator
ÉC (ÉF) Relative humidity
%Air temperature
ÉC (ÉF)
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-71
Page 2472 of 2898

Ambient Air Temperature-to-operating Pressure Table=NJHA0150S0202
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)
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,
28.9 - 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 - 3.40,
39.5 - 48.3)
TROUBLE DIAGNOSES FOR ABNORMAL PRESSURENJHA0151Whenever 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-72 (ªAmbient air temperature-to-
operating pressure tableº).
TROUBLE DIAGNOSES
Insufficient Cooling (Cont'd)
HA-72