Troubleshotting
U-33
Step Inspection Action
5
Inspect condenser
l Inspect condenser (see u-16, condenser
inspection)
l Is it normal?
Yes Adjust refrigerant to specified quantity,
then go to step 19. (excessive quantity of
refrigerant)
No Replace condenser, or repair and clear
condenser vanes, then go to step 19.
6
Verify whether malfunction is in expansion
valve, reservoir/drier and cooling pipeline or
elsewhere.
l Are pressures of refrigerant pipeline at high
and low side both low?
Yes Go to next step.
No Go to step 13.
7
Verify whether malfunction is in expansion
valve, reservoir/drier or elsewhere.
l Does refrigerant high-pressure value
momentarily rise to correct value, and then
fall and stay below it after a/c compressor
started? (is there negative pressure on
low-pressure side?)
Yes Go to next step.
No Go to step 19.
8
Verify whether malfunction is in expansion
valve and reservoir/drier.
l Turn a/c switch off allowing air conditioner
to stop for 10 minutes.
l Start engine.
l Turn both a/c and front fan switch on.
l Does malfunction occur after a/c
compressor switch is turned on?
Yes Replace expansion valve, then go to step
19. (since the expansion valve is closed
too tight, it should be replaced)
No Start vacuum pump and operate for 30
minutes, then go to step 19. (since water
has intermixed in reservoir/drier and
saturated, it must be replaced.)
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