Nissan Terrano r20e. Instruction — part 339
Grade
Bolt size
Bolt diam-
eter*
mm
Pitch
mm
Tightening torque (Without lubricant)
Hexagon head bolt
Hexagon flange bolt
N
⋅
m
kg-m
ft-lb
N
⋅
m
kg-m
ft-lb
4T
M6
6.0
1.0
5.1
0.52
3.8
6.1
0.62
4.5
M8
8.0
1.25
13
1.3
9
15
1.5
11
1.0
13
1.3
9
16
1.6
12
M10
10.0
1.5
25
2.5
18
29
3.0
22
1.25
25
2.6
19
30
3.1
22
M12
12.0
1.75
42
4.3
31
51
5.2
38
1.25
46
4.7
34
56
5.7
41
M14
14.0
1.5
74
7.5
54
88
9.0
65
7T
M6
6.0
1.0
8.4
0.86
6.2
10
1.0
7
M8
8.0
1.25
21
2.1
15
25
2.5
18
1.0
22
2.2
16
26
2.7
20
M10
10.0
1.5
41
4.2
30
48
4.9
35
1.25
43
4.4
32
51
5.2
38
M12
12.0
1.75
71
7.2
52
84
8.6
62
1.25
77
7.9
57
92
9.4
68
M14
14.0
1.5
127
13.0
94
147
15.0
108
9T
M6
6.0
1.0
12
1.2
9
15
1.5
11
M8
8.0
1.25
29
3.0
22
35
3.6
26
1.0
31
3.2
23
37
3.8
27
M10
10.0
1.5
59
6.0
43
70
7.1
51
1.25
62
6.3
46
74
7.5
54
M12
12.0
1.75
98
10.0
72
118
12.0
87
1.25
108
11.0
80
137
14.0
101
M14
14.0
1.5
177
18.0
130
206
21.0
152
1. Special parts are excluded.
2. This standard is applicable to bolts having the following marks
embossed on the bolt head.
Grade
Mark
4T . . . . . . . . . . . . .
7T . . . . . . . . . . . . .
9T . . . . . . . . . . . . .
4
7
9
* : Nominal diameter
M
6
Nominal diameter of bolt threads (Unit: mm)
Metric screw threads
TIGHTENING TORQUE OF STANDARD BOLTS
GI-38
HEATER & AIR CONDITIONER
CONTENTS
. . . . . . . . . . . . . . . ...2
Introduction . . . . . . . . . . . . . . . . ..2
Identification. . . . . . . . . . . . . . . . .2
Precautions for Working with HFC-134a (R-134a) . .3
General Refrigerant Precautions . . . . . . . . .3
Precautions for Refrigerant Connection . . . . . ..4
Precautions for Servicing Compressor. . . . . . 5
. . . . . . . . ...6
Control Operation . . . . . . . . . . . . . . 6
Component Layout . . . . . . . . . . . . . ..7
Air Flow. . . . . . . . . . . . . . . . . . 8
DESCRIPTION - Refrigeration System
. . . . . . .9
Refrigeration Cycle . . . . . . . . . . . . . ..9
. . . . . . . . . . . . . . . ..10
Special Service Tools . . . . . . . . . . . . 10
HFC-134a (R-134a) Service Tools and
Equipment. . . . . . . . . . . . . . . . .. 11
Precautions for Service Equipment . . . . . . ...13
. . . . . . . . . . . .15
HFC-134a (R-134a) Service Procedure . . . . . 15
Refrigerant Lines . . . . . . . . . . . . . ...17
Compressor Mounting . . . . . . . . . . . ...21
Belt Tension . . . . . . . . . . . . . . . ...21
LUBRICATION OIL - Checking and Adjusting
. . ...22
Lubrication Oil. . . . . . . . . . . . . . . 22
Maintenance of Oil Quantity in Compressor . . . .22
Checking and Adjusting . . . . . . . . . . . .22
COMPRESSOR - Model DKV-14C (ZEXEL make)
. ..24
Compressor Clutch . . . . . . . . . . . . . 24
. . . . . . . . . 27
How to Perform Trouble Diagnoses for Quick
and Accurate Repair . . . . . . . . . . . . ..27
Operation Check. . . . . . . . . . . . . . 28
Performance Chart . . . . . . . . . . . . . 30
Performance Test Diagnoses . . . . . . . . . 31
. . . . . . . . . . . ...36
Symptom Chart. . . . . . . . . . . . . . ..36
Preliminary Check. . . . . . . . . . . . . ..37
Harness Layout for A/C System . . . . . . . . 39
Wiring Diagram - Heater. . . . . . . . . . . 41
Wiring Diagram . . . . . . . . . . . . . . ..43
Main Power Supply and Ground Circuit Check . . 51
Diagnostic Procedure 1 . . . . . . . . . . . .52
Diagnostic Procedure 2 . . . . . . . . . . . .54
Diagnostic Procedure 3 . . . . . . . . . . . .59
Electrical Components Inspection . . . . . . . .60
Control Linkage Adjustment. . . . . . . . . ...61
SERVICE DATA AND SPECIFICATIONS (SDS)
. . ..64
General Specifications. . . . . . . . . . . ...64
Inspection and Adjustment . . . . . . . . . . 64
When you read wiring diagrams:
I
Read GI section, “HOW TO READ WIRING DIAGRAMS”.
I
See EL section, “POWER SUPPLY ROUTING” for power distribution circuit.
When you perform trouble diagnoses, read GI section, “HOW TO FOLLOW FLOW CHART IN
TROUBLE DIAGNOSES”.
Introduction
To prevent the ozone layer from being destroyed, the HFC-134a (R-134a) refrigerant has replaced the previ-
ously used CFC-12 (R-12).
The new and previous service tools, refrigerant, lubricant, etc. are not interchangeable due to differences in
their physical properties and characteristics.
Always service the HFC-134a (R-134a) air conditioning system using the specified tools, lubricant and
refrigerant, observing the following precautions:
Identification
IDENTIFICATION LABEL FOR VEHICLE
PARTS IDENTIFICATION
RHA974D
RHA254D
PRECAUTIONS
HA-2
Precautions for Working with HFC-134a
(R-134a)
WARNING:
I
CFC-12 (R-12) refrigerant and HFC-134a (R-134a) refrigerant must never be mixed, even in the
smallest amounts, as they are incompatible with each other. If the refrigerants are mixed, com-
pressor failure is likely to occur.
I
Use only specified lubrication oil for the HFC-134a (R-134a) A/C system and HFC-134a (R-134a)
components. If lubrication oil other than that specified is used, compressor failure is likely to
occur.
I
The specified HFC-134a (R-134a) lubrication oil absorbs moisture from the atmosphere at a rapid
rate, therefore the following handling precautions must be observed:
a: When removing refrigerant components from a vehicle, immediately cap (seal) the component
to minimize the entry of moisture from the atmosphere.
b: When installing refrigerant components to a vehicle, do not remove the caps (unseal) until
just before connecting the components. Also, complete the connection of all refrigerant loop
components as quickly as possible to minimize the entry of moisture into the system.
c: Use the specified lubrication oil from a sealed container only. Containers must be re-sealed
immediately after dispensing the lubrication oil. Lubrication oil in containers which are not
properly sealed will become moisture saturated, and such lubrication oil is no longer suitable
for use and should be properly disposed of.
d: Avoid breathing A/C refrigerant and lubricant vapor or mist. Exposure may irritate eyes, nose
and throat. Use only approved recovery/recycling equipment to discharge HFC-134a (R-134a)
system. If accidental system discharge occurs, ventilate work area before resuming service.
Additional health and safety information may be obtained from refrigerant and lubricant
manufacturers.
e: Do not allow lubrication oil (Nissan A/C System Oil Type S or Type R) to come in contact with
styrofoam parts. Damage may result.
General Refrigerant Precautions
WARNING:
I
Do not release refrigerant into the air. Use approved recovery/recycling equipment to capture the
refrigerant every time an air conditioning system is discharged.
I
Always wear eye and hand protection (goggles and gloves) when working with any refrigerant or
air conditioning system.
I
Do not store or heat refrigerant containers above 52°C (125°F).
I
Do not heat a refrigerant container with an open flame; if container warming is required, place the
bottom of the container in a warm pail of water.
I
Do not drop, puncture, or incinerate refrigerant containers.
I
Keep refrigerant away from open flames: poisonous gas will be produced if refrigerant burns.
I
Refrigerant will displace oxygen, therefore be certain to work in well ventilated areas to prevent
suffocation.
I
Do not introduce compressed air to any refrigerant container or refrigerant component.
PRECAUTIONS
HA-3
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