Mazda CX-9 Grand Touring 2009 Manual page 1771

DESCRIPTION
POSSIBLE CAUSE
DIAGNOSTIC PROCEDURE
NO.10 NOISE WHILE OPERATING A/C SYSTEM DIAGNOSTIC PROCEDURE
STEP INSPECTION
CHECK A/C COMPRESSOR VANE
NOISE
1
Is there a jingling, popping, beeping,
or buzzing sound (A/C compressor
vane noise)?
INSPECT A/C COMPRESSOR
SLIPPAGE NOISE
2
Is there a squeaking or whirling
sound (A/C compressor slippage
noise)?
INSPECT A/C COMPRESSOR
INTERFERENCE NOISE
3
Is there a rattling or vibrating sound
(interference noise)?
INSPECT MAGNETIC CLUTCH
OPERATION NOISE
4
Is there a clicking sound (magnetic
clutch operation noise)?
INSPECT A/C COMPRESSOR NOISE
TIME
5
Is noise heard continuously for more
than 3 s after A/C compressor comes
on?
INSPECT IDLE SPEED
Inspect idle speed.
2008 Mazda CX-9 Grand Touring
2008 HVAC Symptom Troubleshooting (HVAC) - Mazda CX-9
Noise from magnetic clutch, A/C compressor, hose or refrigerant line.
Magnetic clutch operation noise
A/C compressor vane noise
A/C compressor slippage noise
Hose or refrigerant line interference noise
Yes Go to Step 5.
No
Yes Go to Step 14.
No
Yes Go to Step 18.
No
Yes
No
Yes Go to the next step.
No
Yes Go to the next step.
ACTION
Go to the next step.
Go to the next step.
Go to the next step.
Adjust clearance between pressure plate of
magnetic clutch and A/C compressor pulley, then
go to Step 19.
(See MAGNETIC CLUTCH
ADJUSTMENT .)
Condition is normal. (Recheck malfunction
symptoms.)
Condition is normal. (Noise occurs for 2-3 s
immediately after A/C compressor turns on.)