Section 22: HEATING AND AIR CONDITIONING
PA1553
10
FIGURE 13: ACCESS TO DRIVER'S HVAC UNIT AIR
FILTERS
22172
FIGURE 14: DRIVER'S HVAC UNIT AIR FILTERS
The cabin HVAC unit air filters are located in the
evaporator compartment on driver’s side of the
vehicle. To access, open the baggage
compartment forward of the evaporator
compartment. An access door held shut by three
retaining tabs is located in the wall separating
the baggage compartment and the evaporator
compartment. Remove the access door, slide
out the top then bottom filter for maintenance
purposes. (Fig. 15). To clean filters, back flush
with water or soapy water, then dry with air
every 12,000 miles (20 000 km) or once a year,
whichever comes first.
FIGURE 15: CABIN HVAC UNIT AIR FILTERS 22179
CAUTION
Do not use high pressure water jet to avoid
damaging filter.
CAUTION
Be sure not to reverse filter upon installation.
7. HVAC SYSTEM PARTICULARITIES,
TESTING AND TROUBLESHOOTING
Before undertaking any troubleshooting on the
HVAC system, study the appropriate wiring
diagrams to get a complete understanding of the
HVAC components circuitry, read and
understand section 06: ELECTRICAL of this
manual under "Troubleshooting And Testing The
Multiplex Vehicles" and "Test Mode For
Switches And Sensors". The information
included in these paragraphs is necessary for
troubleshooting the HVAC system on Multiplex
vehicles.
7.1 HVAC SYSTEM AND TEST MODE FOR
SWITCHES AND SENSORS
When in switch/sensor test mode (see Section
06: ELECTRICAL for complete information), the
A/C compressor HI and LO pressure values are
displayed one after the other instead of the
outside temperature in the telltale panel LCD
display. This feature can be used when the
vehicle is traveling to check the A/C compressor
pressure values.
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