Content .. 165 166 167 168 ..

Nissan Almera Tino V10 (2001 year). Manual - part 167

CHECK POWER SUPPLY FOR HEATER CONTROL PANEL (A/C SWITCH)

Do approx. 12 volts exist between heater control panel harness terminal No. 7 and body ground?

NHA472

Yes or No

Yes

GO TO 12.

For Europe: GO TO 11.

CHECK CIRCUIT CONTINUITY BETWEEN HEATER CONTROL PANEL AND ECM

Check circuit continuity between heater control panel harness terminal No. 7 and ECM harness terminal No. 44.

NHA473

Continuity should exist.

If OK, check harness for short.

OK or NG

Check ECM. Refer to EC-134 (QG), EC-659 (SR), “ECM Terminals and Reference
Value”.

Repair harness or connector.

TROUBLE DIAGNOSES

Magnet Clutch (Cont’d)

HA-66

CHECK HEATER CONTROL PANEL CIRCUIT

Check circuit continuity between heater control panel harness terminal No. 8 and 18.

NHA474

Continuity should exist.

If OK, check harness for short.

OK or NG

GO TO 13.

Repair harness or connector.

CHECK CIRCUIT CONTINUITY BETWEEN ECM AND HEATER CONTROL PANEL

Check circuit continuity between ECM harness terminal No. 51 and heater control panel harness terminal No. 18.

NHA427

Continuity should exist.

If OK, check harness for short.

OK or NG

GO TO 14.

Repair harness or connector.

CHECK FAN SWITCH

Refer to HA-61.

Yes or No

Yes

GO TO 15.

Replace heater control panel.

TROUBLE DIAGNOSES

Magnet Clutch (Cont’d)

HA-67

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

INSPECTION END

Repair harness or connector.

TROUBLE DIAGNOSES

Magnet Clutch (Cont’d)

HA-68

MAGNET CLUTCH CIRCUIT (FOR YD ENGINE)

=NLHA0203

SYMPTOM:

Magnet clutch does not engage when A/C switch and fan
switch are ON.

CHECK POWER SUPPLY FOR COMPRESSOR

Disconnect compressor harness connector.
Do approx. 12 volts exist between compressor harness terminal No. 1 and body ground?

NHA419

Yes or No

Yes

GO TO 2.

Disconnect A/C relay. GO TO 3.

CHECK MAGNET CLUTCH COIL

OK or NG

Replace magnet clutch.Refer to HA-92

CHECK CIRCUIT CONTINUITY BETWEEN A/C RELAY AND COMPRESSOR HARNESS

Check circuit continuity between A/C relay harness terminal No. 3 and compressor harness terminal No. 1.

NHA420

Continuity should exist.

If OK, check harness for short.

OK or NG

GO TO 4.

Repair harness or connector.

TROUBLE DIAGNOSES

Magnet Clutch (Cont’d)

HA-69

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

Yes or No

Yes

GO TO 5.

Check power supply circuit and 10A (No. 15) fuse at fuse block. Refer to EL-10, “Wiring
Diagram — POWER —”.

CHECK A/C RELAY AFTER DISCONNECTING IT

Refer to HA-73.

OK or NG

Reconnect A/C relay. GO TO 6.

Replace A/C relay.

CHECK COIL SIDE CIRCUIT OF A/C RELAY

Do approx. 12 volts exist between ECM harness terminal No. 204 and body ground?

NHA429

Yes or No

Yes

GO TO 8.

Disconnect A/C relay. Disconnect ECM harness connector. GO TO 7.

TROUBLE DIAGNOSES

Magnet Clutch (Cont’d)

HA-70

7 CHECK CIRCUIT CONTINUITY BETWEEN A/C RELAY AND ECM HARNESS

Check circuit continuity between A/C relay harness terminal No. 2 and ECM harness terminal No. 204.

NHA430

Continuity should exist.

If OK, check harness for short.

OK or NG

Check ECM. Refer to EC-1129 (YD), “ECM Terminals and Reference Value”.

Repair harness or connector.

8 CHECK VOLTAGE FOR ECM

Do approx. 12 volts exist between ECM harness terminal No. 403 and body ground?

NHA431

Yes or No

Yes

GO TO 9.

Check ECM. Refer to EC-1129 (YD), “ECM Terminals and Reference Value”.

9 CHECK POWER SUPPLY FOR DUAL-PRESSURE SWITCH

Do approx. 12 volts exist between dual-pressure switch harness terminal No. 2 and body ground?

NHA432

Yes or No

Yes

GO TO 10.

Repair harness or connector.

TROUBLE DIAGNOSES

Magnet Clutch (Cont’d)

HA-71

CHECK DUAL-PRESSURE SWITCH

Refer to HA-74.

OK or NG

GO TO 11.

Replace dual-pressure switch.

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

GO TO 12.

Repair harness or connector.

CHECK A/C SWITCH

Refer to HA-74.

OK or NG

GO TO 13.

Replace A/C switch.

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

GO TO 14.

Repair harness or connector.

TROUBLE DIAGNOSES

Magnet Clutch (Cont’d)

HA-72

CHECK FAN SWITCH

Refer to HA-61.

OK or NG

GO TO 15.

Replace fan switch.

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

INSPECTION END.

Repair harness or connector.

RHA638H

ELECTRICAL COMPONENT INSPECTION

NLHA0192

A/C Relay

NLHA0192S01

Check continuity between terminal Nos. 3 and 5.

Conditions

Continuity

12V direct current supply between terminal Nos. 1 and 2

Yes

No current supply

If NG, replace relay.

TROUBLE DIAGNOSES

Magnet Clutch (Cont’d)

HA-73

RHA639H

SHA315F

Refrigerant Pressure Sensor

NLHA0192S02

Make 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 Switch

NLHA0192S03

kPa (bar, kg/cm

, psi)

OFF

kPa (bar, kg/cm

, psi)

Low-pressure
side

Increasing 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
side

Decreasing 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 Switch

NLHA0192S04

Check continuity between terminals.

A/C switch

Terminals

Continuity

1 - 7

Yes

1 - 8

OFF

1 - 7

1 - 8

TROUBLE DIAGNOSES

Magnet Clutch (Cont’d)

HA-74

Insufficient Cooling

TROUBLE DIAGNOSIS PROCEDURE FOR INSUFFICIENT COOLING

=NLHA0148

SYMPTOM:

Insufficient Cooling.

INSPECTION FLOW

NHA390

*1: HA-49
*2: HA-79
*3: HA-76

*4: HA-41
*5: HA-40
*6: HA-90

*7: EM-17 (QG), EM-86 (SR),

EM-166 (YD)

*8: EC-373 (QG), EC-882 (SR),

EC-1202 (YD)

TROUBLE DIAGNOSES

Insufficient Cooling

HA-75

PERFORMANCE TEST DIAGNOSES

NLHA0149

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

=NLHA0150

Test Condition

NLHA0150S01

Testing 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 Reading

NLHA0150S02

Recirculating-to-discharge Air Temperature Table

NLHA0150S0201

Inside air (Recirculating air) at blower assembly inlet

Discharge air temperature at center venti-

lator

°C (°F)

Relative humidity

Air temperature

°C (°F)

50 - 60

20 (68)

6.0 - 8.8 (43 - 48)

25 (77)

9.5 - 12.8 (49 - 55)

30 (86)

14.1 - 17.7 (57 - 64)

60 - 70

20 (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

, psi)

Low-pressure (Suction side)

kPa (bar, kg/cm

, psi)

Relative humidity

Air temperature

°C (°F)

50 - 70

20 (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 PRESSURE

NLHA0151

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, 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

Both High and Low-pressure Sides are Too High.

NLHA0151S01

Gauge indication

Refrigerant cycle

Probable cause

Corrective action

Both high and low-pressure sides
are too high.

AC359A

Pressure is reduced soon
after water is splashed on
condenser.

Excessive refrigerant charge
in refrigeration cycle

Reduce refrigerant until speci-
fied pressure is obtained.

Air suction by cooling fan is
insufficient.

Insufficient condenser cooling
performance

↓

1. Condenser fins are

clogged.

2. Improper fan rotation of

cooling fan

Clean condenser.

Check and repair cooling
fan as necessary.

Low-pressure pipe is not
cold.

When compressor is
stopped high-pressure
value quickly drops by
approximately 196 kPa
(2.0 bar, 2 kg/cm

, 28 psi).

It then decreases gradually
thereafter.

Poor heat exchange in con-
denser
(After compressor operation
stops, high pressure
decreases too slowly.)

↓

Air in refrigeration cycle

Evacuate repeatedly and
recharge system.

Engine tends to overheat.

Engine cooling systems mal-
function.

Check and repair each
engine cooling system.

An area of the low-pres-
sure pipe is colder than
areas near the evaporator
outlet.

Plates are sometimes cov-
ered with frost.

Excessive liquid refrigerant
on low-pressure side

Excessive refrigerant dis-
charge flow

Expansion valve is open a
little compared with the
specification.

↓

1. Improper thermal valve

installation

2. Improper expansion valve

adjustment

Replace expansion valve.

High-pressure Side is Too High and Low-pressure Side is Too Low.

NLHA0151S02

Gauge indication

Refrigerant cycle

Probable cause

Corrective action

High-pressure side is too high and
low-pressure side is too low.

AC360A

Upper side of condenser and
high-pressure side are hot,
however, liquid tank is not so
hot.

High-pressure tube or parts
located between compressor
and condenser are clogged
or crushed.

Check and repair or
replace malfunctioning
parts.

Check lubricant for con-
tamination.

TROUBLE DIAGNOSES

Insufficient Cooling (Cont’d)

HA-80

High-pressure Side is Too Low and Low-pressure Side is Too High.

NLHA0151S03

Gauge indication

Refrigerant cycle

Probable cause

Corrective action

High-pressure side is too low and
low-pressure side is too high.

AC356A

High and low-pressure sides
become equal soon after
compressor operation stops.

Compressor pressure opera-
tion is improper.

↓

Damaged inside compressor
packings

Replace compressor.

No temperature difference
between high and low-pres-
sure sides

Compressor pressure opera-
tion is improper.

↓

Damaged inside compressor
packings.

Replace compressor.

Both High- and Low-pressure Sides are Too Low.

NLHA0151S04

Gauge indication

Refrigerant cycle

Probable cause

Corrective action

Both high- and low-pressure sides
are too low.

AC353A

There is a big temperature
difference between
receiver drier outlet and
inlet. Outlet temperature is
extremely low.

Liquid tank inlet and
expansion valve are
frosted.

Liquid tank inside is slightly
clogged.

Replace liquid tank.

Check lubricant for con-
tamination.

Temperature of expansion
valve inlet is extremely
low as compared with
areas near liquid tank.

Expansion valve inlet may
be frosted.

Temperature difference
occurs somewhere in
high- pressure side

High-pressure pipe located
between receiver drier and
expansion valve is clogged.

Check and repair malfunc-
tioning parts.

Check lubricant for con-
tamination.

Expansion valve and liquid
tank are warm or only cool
when touched.

Low refrigerant charge

↓

Leaking fittings or compo-
nents

Check refrigerant for leaks.
Refer to “Checking Refriger-
ant Leaks”, HA-100.

There is a big temperature
difference between expan-
sion valve inlet and outlet
while the valve itself is
frosted.

Expansion valve closes a
little compared with the
specification.

↓

1. Improper expansion valve

adjustment

2. Malfunctioning thermal

valve

3. Outlet and inlet may be

clogged.

Remove foreign particles
by using compressed air.

Check lubricant for con-
tamination.

An area of the low-pressure
pipe is colder than areas
near the evaporator outlet.

Low-pressure pipe is clogged
or crushed.

Check and repair malfunc-
tioning parts.

Check lubricant for con-
tamination.

Air flow volume is not
enough or is too low.

Evaporator is frozen.

Check thermo control
amp. operation.

Replace compressor.

TROUBLE DIAGNOSES

Insufficient Cooling (Cont’d)

HA-81

Content .. 165 166 167 168 ..