1995 NISSAN ALMERA N15 Thermo

Note

CHECK CIRCUIT CONTINUITY BETWEEN
ECM (ECCS CONTROL MODULE)HAR-
NESS TERMINAL
@
AND THERMO
CONTROL AMP.HARNESS TERMINAL

@.

Continuity shouldexist.

If OK, check harness forshort.

TROUBLE
DIAGNOSES
Diagnostic Procedure3(Cont'd)

@

t

RIL

EGM
(EGGS control
module) connector@
EGM
ECONNECTORII

44

RIL

Thermo
control
amp. connector ~

~ II

~OK

Reconnect thermocontrol amp.harness
connector.
Thermo control

,mp;""",,,
@~

LHD:
G/S'~
rrIDl
rJ.

RHD: GY
L-.D--J
1

Replacethermocontrol
amp.
Note

No

CHECK CIRCUIT CONTINUITY BETWEEN
THERMO CONTROL AMP.HARNESS
TERMINAL
@
AND AICSWITCH HAR-
NESS TERMINAL
@.

Continuity shouldexist.

If
OK.
check harness forshort. Note
Disconnect
AIC
switch harness connec-
tor.

CHECK
BODYGROUND CIRCUITFOR
THERMO CONTROL AMP.

Disconnect thermocontrol amp.harness
connector. Does continuity existbetween thermo
control amp.harness terminal @and
body ground?

CHECK
POWER SUPPLY FORTHERMO
CONTROL AMP.

Refer toHA-49.

LHD:
GIS

RHD: GY

RHA365F
RHA364F

A/G
switch
connector @

i55lJ

Thermo
control
amp. connector
@)

~

LHD:
GIS

RHD: GY

NG
switch
connector@

62J

LHD: G/Y
RHD: LG/S
Fan
switch
connector@

~
LHD: G/Y

RHD: LG/B

RHA366F OK
CHECK AICSWITCH.

Refer toHA-63.

OK

Disconnect fanswitch harness connec-
tor.
NoteReplace

AIC
switch.

•

CHECK CIRCUIT CONTINUITY BETWEEN
AIC SWITCH HARNESS TERMINAL
@

AND FANSWITCH HARNESS TERMINAL

@.

OK

Note:
If
the result isNG orNo alter checking circuitcontinuity, repairharness or
connector.

HA-57

DisconnectECM(Engine
control module) harness
connector. Disconnect dual-pressure
switch harness connector .

Ii

~i)~@
ECM (Engine control
module) connector
@

II
ECM
E[CONNECTORII

8

G TROUBLE
DIAGNOSES
Diagnostic Procedure3(Cont'd)

@

+
I
Reconnect AICrelay.

Ii
r---

CHECK COILSIDECIRCUIT OFAIC No
RELAY.
Do approx. 12Yolts existbetween ECM
(Engine controlmodule) harnesstermi-
nal
@
and body ground?
G
G
ECM
(Engine control Dual-pressure
module) connector ~switch connector
@)

II
ECM
HCONNECTORII ~

8
[iJ
Note
CHECK CIRCUIT CONTINU-
ITY BETWEEN ECM
(ENGINE CONTROL MOD-
ULE) HARNESS TERMINAL
@ AND DUAL-PRESSURE
SWITCH HARNESS TERMI-
NAL G).
Continuity shouldexist.
If OK, check harness for
short.
Yes
....
RHA370F
OK
Dual-pressure switch
connector@ RHA368F
AlC relay
connector@ CHECK
DUAL-
PRES-
SURE
SWITCH. Refer to
HA-64.
NG

Replace
dual-
pressure
switch.
Note
~i5~~
ECM
11
CONNECTOR
II

31

o
L

II

ECM
(Engine control
AIL

module)@ L
RHA414F

o
CHECK VOLTAGE FORECM (Engine
control unit).
Do approx. 12YOIts exist between ECM
(Engine controlmodule) Ilarnesstermi-
nal No.
@
and body ground?
Yes

-=
Disconnect ECM(Engine controlmod-
ZHA158AA ule)harness connector.
Disconnect thermocontrolamp.har-
ness connector. No
CHECK
CIRCUIT CONTINU-
ITY BETWEEN AICRELAY
HARNESS TERMINAL
@

AND DUAL-PRESSURE
SWITCH HARNESS TERMI-
NAL
@.

Continuity shouldexist.
If OK, check harness for
short.
CHECK ECM(Engine con-
trol module). (RefertoEC
section.)
@
(Go tonext page.)
Note:
If the result isNG orNo after checking circuitcontinuity, repairharness or
connector.
HA-60

Replacethermocontrol
amp.
Note
No Note
CHECK POWER SUPPLY FORTHERMO
Co"NTROL AMP.
Refer toHA-49.
Reconnect
thermocontrolamp.harness
connector.
CHECK BODYGROUND CIRCUITFOR
THERMO CONTROL AMP.
Disconnect thermocontrolamp.harness
connector.
Does continuity existbetween thermo
control amp.harness terminal
@
and
body ground? OK
CHECK
CIRCUIT CONTINUITY BETWEEN
ECM (ENGINE CONTROL MODULE)
HARNESS TERMINAL @AND THERMO
CONTROL AMP.HARNESS TERMINAL
@.
Continuity shouldexist.
If OK, check harness forshort.

II

TROUBLE
DIAGNOSES
Diagnostic Procedure3(Conl'd)

(!)
~

RHA364F

:~~~~~;;:~:
@)~

LHO:
G/S'~
rn
(l

RHO: GY'L-.D--J
1

Thermo
control ECM(Engine control
amp. connector@) module)connector
@

~ II
ECM ?,CONNECTOOII

I
AIL ~_tR/L

II

II
DisconnectAICswitch harness connec-

tor.

Thermo
control
amp. connector @)
~
A/C

switch
connector
@

~
II
Note
LHO: GIS
RHO: GY LHO:
GIS
RHO: GY
RHA365F CHECK
CIRCUIT CONTINUITY BETWEEN
THERMO CONTROL AMP.HARNESS
TERMINAL
@
AND AICSWITCH HAR-
NESS TERMINAL
@.

Continuity shouldexist.
If OK, check harness forshort.

•

Replace
AICswitch.
Note
OK
OK
CHECK
AICSWITCH.
Refer toHA-63.
Disconnect fanswitch harness connec-
tor.
LHO: G/Y
RHO: LG/S
Fan
switch
connector
@ID

~
RHA366F CHECKCIRCUIT CONTINUITY BETWEEN
AIC SWITCH HARNESS TERMINAL @
AND FANSWITCH HARNESS TERMINAL

@.

Continuity shouldexist.
If OK, check harness forshort.
NC
switch
connector@

[ij

LHO: G/Y
RHO: LG/S
OK

@

(Go tonext page.)
Note:

If
the result isNG orNo after checking circuitcontinuity, repairharness or
connector.
HA-61

Circuitcheck
~
AlC switch
connector TROUBLE
DIAGNOSES
Electrical Components Inspection(Cont'd)
BLOWER RESISTOR

Check resistance betweenterminals.

Terminal No.
Resistance

EB
8

@
Approx.1.4-1.6Q

@
(1)

Approx.2.5-2.8Q

@
Approx.0.5-0.6Q

AIC SWITCH

Check continuity betweenterminals ateach switch position.

.
Switch
condition TerminalNo.
Continuity

A/C
EB
e

ON Yes

@
@

OFF No

RHA328F RECIRCULATION SWITCH

Check continuity betweenterminals ateach switch position.

I
I
I
I
I

'-

SHA732E
Terminal
No.
Recirculation
switch condition Continuity

EB
e

ON Yes

(1)
@

OFF No
ON No

@ @

OFF Yes

THERMAL PROTECTOR

THERMO CONTROL AMP.

1. Run engine, andoperate
AIC
system.
2. Connect thevoltmeter fromharness side.
3. Check thermo controlamp.operation showninthe table.

Evaporator outletairtemperature Thermoamp.
Tester
°C CF) operation
Decreasing to2.5 -3.5 (37-38) TurnOFF Approx.
12V
Increasing to4.0 -5.0 (39-41) Turn
On Approx.OV
Temperature
ofcompressor

°C
(OF)

Increasing toapprox. 145-155 (293 -311)
Decreasing toapprox. 130-140 (266 -284) Compressor
operation
Turn OFF
Turn ON

•

HA-63

SERVICEPROCEDURES
Refrigerant Lines(Cont'd)

GA ENGINE lHDMODEL

SEC. 271.274.276

Low-pressure (Suction)servicevalve

~
10-20 (1.0 -2.0, 87-174)
6 mm (0.24 in)dia.

Thermo controlamp.

•

Dual-pressure
switch
~ Liquid tank
High-pressure
(Discharge) servicevalve
High-pressure
(Discharge) servicevalve

o
(Tightening torque)
D D (Wrench size)
D (O-ring size)
~ :N'm (kg-m, ft-lb)

~ :25 -34 (2.5 -3.5, 18-25)

~ :N'm (kg-m, in-Ib)

rm :
10 -20 (1.0 -2.0, 87-174)
~ :8 •11 (0.8 •1.1, 69•95)
~ :2.9 •3.9 (0.3 -0.4, 26•35)
~
15•20 (1.5 -2.0, 11-14)
~ 8
mm
(0.31
in)
die.

___ ==- - ~
20-25

(2.0 -2.5, 14-18)

."""\ ~t;,
12mm (0.47 in)dia.

Expansion valve
RHA334F
HA-73

SERVICEPROCEDURES
Refrigerant Lines
(Cont'd)

CD ENGINE LHDMODEL
SEC. 271'274'276

[O.J
15. 20(1.5 -2.0, 11-14)
8
mm
(0.31
in)
dia.

[O.J
20-25 (2.0 -2.5, 14-18)
12 mm (0.47 in)dia.
~ 10•20 (1.0 -2.0, 87•174)
6 mm (0.24 in)dia.

Thermo controlamp.
High-pressure (Discharge)servicevalve

o
(Tightening torque)

o
0
(Wrench size)

o
(O-ring size)

[O.J :
N'm (kg-m, It-Ib)

B :
25 -34 (2.5 -3.5, 18-25)

~ :N'm (kg-m, in-Ib)

[SJ
:10 -20 (1.0 -2.0,87 -174)

[Q :
8 -11 (0.8 -1.1, 69-95)

[Q] :
2.9 •3.9 (0.3 -0.4, 26-35)

HA-74
Cooling
unit
Low-pressure (Suction)service
valve

Liquid tank

RHA335F