Detail Diagnosis Table - Suzuki Jimny Service Manual

CROSSING POINT OF CENTER VENTILATION LOUVER TEMPERATURE AND RECIRCULATION AIR
INLET TEMPERATURE
Condition
Crossing point is
higher than accept-
able range
("E" area)
Crossing point is
lower than acceptable
range
("F" area)
Detail diagnosis table (Ambient temperature at 30°C (86°F))
Condition
MPa
MANIFOLD
(kg/cm
GAUGE
(psi)
Lo Hi
0.23 – 0.35 1.4 – 1.75
(2.3 – 3.5) (14 – 17.5)
(33 – 50) (200 – 249)
0.5 – 0.6
Negative
(5 – 6)
pressure
(71.2 – 85.3)
Normal :
Normal :
1.4 – 1.75
0.23 – 0.35
(14 – 17.5)
(2.3 – 3.5)
(200 – 249)
(33 – 50)
↑ ↑ ↑ ↑ ↓ ↓ ↓ ↓
↑ ↑ ↑ ↑ ↓ ↓ ↓ ↓
Abnormal :
Abnormal :
0.69 – 0.98
Negative
(7 – 10)
pressure
(100 – 142)
Possible Cause
Insufficient or excessive charge of refrigerant
Dirty or bent A/C evaporator fins
Air leakage from cooling (heater) unit or air duct Repair or replace
Malfunctioning, switch over function of door in
cooling (heater) unit
Compressor malfunction
Insufficient air volume from center duct (Heater
blower malfunction)
Compressor malfunction
2
)
Detail
Normal condition
The low pressure side
reads a negative pres-
sure, and the high pres-
sure side reads an
extremely low pressure.
Presence of frost
around tubing to and
from receiver / dryer
and expansion valve.
During A/C operation,
the low pressure side
sometimes indicates
negative pressure, and
sometimes normal
pressure. Also high
pressure side reading
fluctuates between the
abnormal and normal
pressure.
AIR CONDITIONING (OPTIONAL) 1B-13
Check refrigerant pressure
Clean or repair
Repair or replace
Check compressor
Check blower motor and fan
Check compressor
Possible Cause
–
Dust particles or water
droplets are either stuck
or frozen inside expan-
sion valve, preventing the
refrigerant from flowing.
Expansion valve is frozen
due to moisture in the
system, and temporarily
shuts off the refrigeration
cycle.
Correction
Correction
–
Clean expansion valve.
Replace it if it cannot be
cleaned.
Replace receiver / dryer.
Evacuate the A/C sys-
tem and recharge with
fresh refrigerant.
Replace expansion valve.
Replace receiver / dryer.
Evacuate A/C system
and recharge with fresh
refrigerant.