power-up to test the lamp operation (self test).
The lamp will begin to flash (ON, then OFF, ON...)
after the five second self test. The sequence of
flashes represent the Flash Code diagnostic mes-
sage.
Count the first sequence of flashes to determine the
first digit. After a two second pause, count the sec-
ond sequence of flashes to determine the second
digit. Any additional flash code diagnostics will fol-
low (after a pause) and will be displayed in the
same manner.
See Table 2, Possible Performance Effect of Active
Diagnostic Codes, for possible effect of Active
Diagnostic Codes.
2.10 ELECTRICAL SYSTEM, FUNCTIONAL
DESCRIPTION
Refer to Figure 2-7. The electrical system is com-
prised of not only the necessary equipment
required to operate the compressor, but also a sys-
tem to shut it down in the event of a malfunction.
The components of the electrical system are an
engine starter (with an integral solenoid), battery,
an alternator with a built-in voltage regulator, a
compressor discharge temperature switch (which
will shut down the compressor should the compres-
sor temperature exceed 265°F [130°C]), a low
coolant shutdown switch and a low fuel shutdown
switch. This compressor also incorporates an
engine coolant level detector. This device is locat-
ed in the top tank on the engine radiator. It will shut
the compressor down or prevent it from being start-
ed if the engine coolant level drops too low. In addi-
tion, there is a starter protection relay which pre-
vents accidental starter engagement after the
engine is running or whenever there is pressure in
Only Active diagnostic codes can be
read in this manner. Logged diagnos-
tic codes must be retrieved with an
Electronic Service Tool.
NOTE
Section 2
DESCRIPTION
19
Figure 2-6 Aftercooled Compressed Air Discharge System
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