419 / 801
FATC
32
NO COOL AIR
TROUBLESHOOTING HINTS
A/C compressor system malfunction - Step 2 or A/C switch system malfunction - Step 3, 4
STEP
INSPECTION
ACTION
1
Inspect air blow out Does air blow out?
Yes
Go to next step
No
Go to step 1 of troubleshooting indexes
No. 1, 2
2
Inspect a/c compressor operation Start
Ignition Turn both A/C switch and blower
switch on.
Does A/C compressor operate?
Yes
Go to next step
No
Go to next step
3
Inspect a/c switch indicator light Does
a/c switch indicator light illuminate
Yes
Go to step 5.
No
Go to next step.
4
Inspect a/c switch Inspect A/C switch is
it okay?
Yes
Yes
Inspect wiring harness between climate
control unit and resistor.
No
Replace climate control unit.
5
Inspect a/c relay
(Coil-side)
Inspect A/C
relay. Is it okay
Yes
Repair wiring harness between A/C relay
and PCM
(Terminal S).
No
Replace A/C relay
6
Inspect a/c relay
(Switch-side)
Inspect
A/C relay.
Is it okay?
Yes
Install A/C relay, then go to next step.
No
Replace A/C relay
7
Verify whether malfunction is in magnet-
ic clutch and thermal protector or wiring
harness
(Between a/c relay and magnet-
ic clutch)
Test voltage at magnetic clutch con-
nector terminal A
(A/C control signal
). Is
voltage approximately 12 V?
Yes
Inspect magnetic clutch, If magnetic clutch
is normal Recheck malfunction symptoms,
then repeat from Step 1 if malfunction re-
curs. If magnetic clutch is malfunctioning:
Replace compressor, then go to next step
No
Repair wiring harness between A/C relay
and magnetic clutch, then go to next step.
8
Verify that malfunction symptom occurs
after repair
Does cool air blow out?
(Is refrigerant
system performance test result correct?)
Yes
Troubleshooting completed. Explain re-
pairs to customer.
No
Recheck malfunction symptoms, then re-
peat from Step 1 if malfunction recurs.