TB 9-2320-360-13&P-1
A/C COMPRESSOR DOES NOT SHUT OFF OR CYCLES CONSTANTLY - CONTINUED.
4.
KNOWN INFO
WARNING
Read WARNING on
A/C operates.
page 0019 00-7.
magnetic switch (R31) supply and
control circuit OK.
Are 12 to 14 vdc measured on
Air supply to engine fan control
yellow wire at A/C engine fan
OK.
control solenoid, when A/C
A/C condenser not blocked with
TEST OPTIONS
debris.
compressor receiver/dryer
Voltage test.
A/C high pressure switch not
harness connector terminals
shorted.
at A/C high pressure switch
A/C thermostatic switch
are jumped?
REASON FOR QUESTION
temperature probe installed
If 12 to 14 vdc is not measured, A/
correctly.
C engine fan control solenoid will
A/C thermostatic switch OK.
not energize.
A/C engine fan control solenoid
valve OK.
Go to Step 6 of
NO
POSSIBLE PROBLEMS
this fault.
A/C engine fan control solenoid
black wire faulty.
YES
A/C engine fan control solenoid
faulty.
A/C engine fan control solenoid
circuit breaker faulty.
A/C engine fan control solenoid 12
vdc supply circuit wiring faulty.
5.
WARNING
KNOWN INFO
TEST OPTIONS
Read WARNING on
A/C operates.
Continuity test.
page 0019 00-7.
magnetic switch (R31) supply and
control circuit OK.
REASON FOR QUESTION
Is continuity measured on
Air supply to engine fan control
black wire from A/C engine
If continuity is measure, A/C
OK.
fan control solenoid to
engine fan control solenoid is
A/C condenser not blocked with
faulty. If not, ground circuit is
ground?
debris.
faulty.
A/C high pressure switch not
shorted.
A/C thermostatic switch
temperature probe installed
correctly.
A/C thermostatic switch OK.
Repair black wire from A/C
A/C engine fan control solenoid
engine fan control solenoid
valve OK.
connector to A/C evaporator
NO
A/C engine fan control solenoid
harness connector (See WP
circuit breaker OK.
0057 00, Fig j) or notify DS
A/C engine fan control solenoid 12
Maintenance. Verify repair,
vdc supply circuit wiring OK.
go to Step 10 of this fault.
YES
POSSIBLE PROBLEMS
A/C engine fan control solenoid
Replace A/C engine
black wire faulty.
fan control solenoid
A/C engine fan control solenoid
(WP 0026 00). Verify
faulty.
repair, go to Step 10
of this fault.
0019 00-6