Mazda CX-9 Grand Touring 2009 Manual page 1766

INSPECT TO SEE WHETHER
MALFUNCTION IS IN EXPANSION
VALVE, AIR MIX ACTUATOR AND
COMPRESSOR OIL OR
14
ELSEWHERE
Does the refrigerant high-pressure
value hardly increase?
INSPECT TO SEE WHETHER
MALFUNCTION IS IN
COMPRESSOR OIL AMOUNT AND
A/C COMPRESSOR OR
15
ELSEWHERE
When the engine is racing, does the
high-pressure value increase?
INSPECT TO SEE WHETHER
MALFUNCTION IS IN
COMPRESSOR OIL AMOUNT OR
A/C COMPRESSOR
16
After compressor oil is replenished
each 10 ml {10 cc, 0.34 fl oz} ,
does high-pressure value increase?
INSPECT TO SEE WHETHER
MALFUNCTION IS IN EXPANSION
VALVE OR ELSEWHERE
17
Is only refrigerant low-pressure
value high?
VERIFY THAT AIR MIX IS
INSTALLED SECURELY AND
PROPERLY
2008 Mazda CX-9 Grand Touring
2008 HVAC Symptom Troubleshooting (HVAC) - Mazda CX-9
Yes Go to the next step. (Pressure hardly increases.)
No
Yes Return to Step 3.
No
Yes
No
Yes Go to Step 19.
No
Yes
Replace O-ring on piping, adjust refrigerant to
specified amount, then go to Step 20.
Go to Step 17.
Go to the next step.
Troubleshooting completed. (Explain to customer
that cause was insufficient compressor oil.)
Replace the A/C compressor, then go to Step 20.
(Cause is defective A/C compressor.)
Go to the next step.
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