Honda 2004 Odyssey, Service Manual

Page: 1543 / 2459

＊０１
＊０２
A/C Pressure Switch
21-12
Heating/Air Conditioning
System Description (cont’d)
ON
OFF
196 kPa
(2.0 kgf/cm , 28 psi)
225 kPa
(2.3 kgf/cm , 33 psi) 2,550 kPa
(26.0 kgf/cm , 370 psi)
3,140 kPa
(32.0 kgf/cm , 455 psi)
590 kPa
(6.0 kgf/cm , 85 psi) 20 kPa
(0.2 kgf/cm , 2.8 psi)
2
2 2
2
2
2
290 kPa (3.0 kgf/cm , 43 psi)
1,520 kPa
(15.5 kgf/cm , 220 psi)
1,230 kPa
(12.5 kgf/cm , 178 psi)
ON
OFF
HIGH-LOW
PRESSURE
SWITCH
MIDDLE
PRESSURE
SWITCH
2
2
2
The A/C pressure switch consists of a high-low pressure switch (A/C pressure switch A) and a middle pressure switch
(A/C pressure switch B).
• High-Low pressure switch
If the refrigerant pressure becomes too high (due to blockage or lack of airflow at the condenser), or too low (due to
leakage), the A/C pressure switch stops the A/C request a signal to the PCM and the compressor stops operating.
• Middle pressure switch
If the refrigerant pressure goes above or below 1,520 kPa (15.5 kgf/cm , 220 psi), the A/C pressure switch opens or
closes to signal the PCM to change the speed of the condenser fan and radiator fan (high-low).
2
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