YH4
GRAND
VITARA
1B-14
AIR CONDITIONING (OPTIONAL)
HIGH PRESSURE CAUGE
LOW PRESSURE GAUGE
THERMOMETER A
T
CENTER DUCT
Insufficient
cooling of
condenser
PERFORMANCE DIAGNOSIS TABLE
TESTING RESULTS
POSSIBLE CAUSE
REMEDY
Pressure high
(“A” area of high side
graph)
D
Refrigerant overcharged
D
Expansion valve frozen or clogged
D
Clogged refrigerant passage of high side
D
Condenser fan malfunction
D
Dirty or bent condenser fins
D
Compressor malfunction (Insufficient oil etc.)
D
Engine overheat
D
Recharge
D
Check expansion valve
D
Clean or replace
D
Check condenser fan
D
Clean or repair
D
Check compressor
D
Check engine cooling
system
Pressure low
(“B” area of high side
graph)
D
Insufficient refrigerant (Insufficient charge or
leakage)
D
Expansion valve malfunction (Valve opens too
wide)
D
Compressor malfunction (Insufficient
compression)
D
Check for leakage, repair if
necessary and recharge
D
Check expansion valve
D
Check compressor
Pressure high
(“A” area of low side
graph)
D
Expansion valve malfunction (Valve opens too
wide)
D
Compressor malfunction (Insufficient
compression)
D
Check expansion valve
D
Check compressor
Pressure low
(“B” area of low side
graph)
D
Insufficient refrigerant (Insufficient charge or
leakage)
D
Expansion valve malfunction (Valve opens too
narrow)
D
Clogged refrigerant passage (Crashed pipe)
D
Check for leakage, repair if
necessary and recharge
D
Check expansion valve
D
Repair or replace
Outlet air temperature
at center duct is high
(Crossing point is in
area “A”)
D
Insufficient or excessive charge of refrigerant
D
Dirty or bent evaporator fins
D
Air leakage from cooling (heater) unit or air
duct
D
Malfunctioning, switchover function of damper
in cooling (heater) unit
D
Compressor malfunction
D
Check refrigerant
pressure
D
Clean or repair
D
Repair or replace
D
Repair or replace
D
Check compressor
Outlet air temperature
at center duct is low
(Crossing point is in
area “B”)
D
Insufficient air volume from center duct
(Heater blower malfunction)
D
Compressor malfunction
D
Check blower motor and
fan
D
Check compressor
NOTE:
If ambient temperature is within 30 – 35
_
C (85 – 95
_
F), it is possible to do using next page table for more
detail diagnosis.
Summary of Contents for Grand Vitara 1998
Page 225: ...YH4 GRAND VITARA FRONT SUSPENSION 3D 23 TIGHTENING TORQUE SPECIFICATIONS ...
Page 531: ...YH4 GRAND VITARA 8 6 BODY ELECTRICAL SYSTEM POWER SUPPLY DIAGRAM Refer to Section 8A ...
Page 659: ...YH4 GRAND VITARA BODY SERVICE 9 41 1 Side body outer panel A Apply sealant B Brush treatment ...
Page 673: ...YH4 GRAND VITARA BODY SERVICE 9 55 B B C C 2 DOOR MODEL ...