Replace O-ring on piping, adjust refrigerant to
specified amount, then go to Step 20.
14
INSPECT TO SEE WHETHER
MALFUNCTION IS IN EXPANSION
VALVE, AIR MIX ACTUATOR AND
COMPRESSOR OIL OR
ELSEWHERE
z
Does the refrigerant high-pressure
value hardly increase?
Yes Go to the next step. (Pressure hardly increases.)
No
Go to Step 17.
15
INSPECT TO SEE WHETHER
MALFUNCTION IS IN
COMPRESSOR OIL AMOUNT AND
A/C COMPRESSOR OR
ELSEWHERE
z
When the engine is racing, does the
high-pressure value increase?
Yes Return to Step 3.
No
Go to the next step.
16
INSPECT TO SEE WHETHER
MALFUNCTION IS IN
COMPRESSOR OIL AMOUNT OR
A/C COMPRESSOR
z
After compressor oil is replenished
each
10 ml {10 cc, 0.34 fl oz}
,
does high-pressure value increase?
Yes Troubleshooting completed. (Explain to customer
that cause was insufficient compressor oil.)
No
Replace the A/C compressor, then go to Step 20.
(Cause is defective A/C compressor.)
17
INSPECT TO SEE WHETHER
MALFUNCTION IS IN EXPANSION
VALVE OR ELSEWHERE
z
Is only refrigerant low-pressure
value high?
Yes Go to Step 19.
No
Go to the next step.
VERIFY THAT AIR MIX IS
INSTALLED SECURELY AND
PROPERLY
Yes
Set the fan switch to 4th position.
Turn the A/C switch on.
Set FRESH mode.
Set temperature control to MAX COLD.
Set VENT mode.
1. Start and run the engine at
1,500 rpm for 10
min.
2. Run the engine at idle for
1 min.
3. Within
12 s, idle -> 4,000 rpm
-> idle.
Perform cycle
5 times.
4. Run the engine at idle for
30 s.
5. Drain the compressor oil completely from the
2008 Mazda CX-9 Grand Touring
2008 HVAC Symptom Troubleshooting (HVAC) - Mazda CX-9
Microsoft
Sunday, November 15, 2009 10:14:51 AM
Page 25
© 2005 Mitchell Repair Information Company, LLC.
