A/C System Performance Inspection - Suzuki Liana RH413 Service Manual

Terminal Wire Color
Temperature control
G77-28 WHT
actuator position sensor
G77-29 —
G77-30 —

A/C System Performance Inspection

1) Confirm that vehicle and environmental conditions
are as follows.
• Vehicle is not exposed to direct sunshine.
• Ambient temperature is within 15 – 35 °C (59 – 95
°F).
2) Make sure that high pressure valve (1) and low
pressure valve (2) of manifold gauge set (3) are
firmly closed.
3) Connect high pressure charging hose (4) to high
pressure service valve (5) and connect low pressure
charging hose (6) to low pressure service valve (7).
4) Bleed the air in charging hoses (4) and (6) by
loosening their respective nuts on manifold gauge
set (3), utilizing the refrigerant pressure. When a
hissing sound is heard, immediately tighten nut.
3
2
1
6
4
5
Normal
Circuit
Voltage
about 4.0 V
about 1.0 V
—
—
7
I3RH0A721005-01
Air Conditioning System: Manual Type 7B-16
Ignition switch ON, Temperature selector MAX COOL
position
Ignition switch ON, Temperature selector MAX HOT
position
—
—
5) Warm up engine to normal operating temperature
(engine coolant temperature at 80 – 90 °C (176 –
194 °F)) and keep it at specified idle speed.
(Radiator cooling fan should not be working when
checking temperature.)
6) Set A/C switch to "ON" position, blower speed
selector at maximum speed position, temperature
selector at maximum cool position, air flow selector
at vent position and air intake selector at
recirculation air mode. (Confirm that A/C compressor
and condenser cooling fan are working.)
Keep all windows, doors and engine food open.
Performance diagnosis condition
Ambient temperature: 15 – 35 °C (59 – 95 °F)
Engine rpm: Keep to 1,500 rpm.
Blower speed selector: Maximum speed position
Temperature selector: Maximum cool position
Air flow selector: Vent position
Vehicle doors: All open
Air intake selector: Recirculation air mode
7) With dry bulb thermometer (1) inserted into center
ventilation louver and another one set near
recirculation air inlet, read temperature difference.
Condition
—
—
S3RH0A7214003
1
I2RH01720007-01