Nissan Silvia. Manual — part 281
ZHA072H
Dual-pressure Switch
=NMHA0279S03
Terminals
High-pressure side line
pressure
kPa (kg/cm
2
, psi)
Operation
Continuity
Low-pres-
sure side
1 - 2
Increasing to
157 - 216
(1.6 - 2.2, 23 - 31)
ON
Exists.
Decreasing to
152.0 - 201.0
(1.55 - 2.05, 22.0 - 29.2)
OFF
Does not
exist.
High-pres-
sure side
1 - 2
Decreasing to
1,373 - 1,765
(14 - 18, 199 - 256)
ON
Exists
Increasing to
2,648 - 2,844
(27 - 29, 384 - 412)
OFF
Does not
exist.
SHA471F
A/C Relay
NMHA0279S04
Check 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.
GI
MA
EM
LC
EC
FE
CL
MT
AT
PD
AX
SU
BR
ST
RS
BT
SC
EL
IDX
TROUBLE DIAGNOSES
Magnet Clutch (Cont’d)
HA-75
Noise
TROUBLE DIAGNOSIS PROCEDURE FOR NOISE
=NMHA0080
Symptom:
I
Noise
Inspection Flow
SHA336FA
*3: HA-79
*4: EM-16
TROUBLE DIAGNOSES
Noise
HA-76
HFC-134a (R-134a) Service Procedure
NMHA0094
SETTING OF SERVICE TOOLS AND EQUIPMENT
NMHA0094S01
Discharging Refrigerant
NMHA0094S0101
WARNING:
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) refrigerant.
If accidental system discharge occurs, ventilate work area before resuming service. Additional health
and safety information may be obtained from refrigerant and lubricant manufacturers.
SHA539DE
Evacuating System and Charging Refrigerant
NMHA0094S0102
SHA540DC
GI
MA
EM
LC
EC
FE
CL
MT
AT
PD
AX
SU
BR
ST
RS
BT
SC
EL
IDX
SERVICE PROCEDURE
HFC-134a (R-134a) Service Procedure
HA-77
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