z
Is it normal?
condenser fins, then go to Step 20.
6
INSPECT TO SEE WHETHER
MALFUNCTION IS IN EXPANSION
VALVE, RECEIVER/DRIER AND
REFRIGERANT LINES OR
ELSEWHERE
z
Are the refrigerant high-pressure
and low-pressure values low?
Yes Go to the next step.
No
Go to Step 14.
7
INSPECT TO SEE WHETHER
MALFUNCTION IS IN EXPANSION
VALVE AND RECEIVER/DRIER OR
ELSEWHERE
z
Immediately after the A/C
compressor operates, does the
refrigerant high-pressure value
momentarily rise to correct value,
then fall and stay below it? (Is there
negative pressure on low-pressure
side?)
Yes Go to the next step.
No
Go to Step 10.
8
INSPECT TO SEE WHETHER
MALFUNCTION IS IN EXPANSION
VALVE OR RECEIVER/DRIER
z
Turn the A/C switch off and let the
air conditioner stop for 10 min.
z
Start the engine.
z
Turn the both A/C switch and fan
switch on.
z
Does the malfunction occur after
the A/C compressor turns on?
Yes Go to the next step.
No
Replace the condenser and vacuum the refrigerant
line
more than 30 min
by the vacuum pump, add
refrigerant to the specified level, then go to Step 20.
(Since water has intermixed in the receiver/drier
and it is saturated, replacement is necessary.)
9
VERIFY THAT EXPANSION VALVE
HEAT-SENSING TUBE WITHIN A/C
UNIT IS POSITIONED SECURELY
AND CORRECTLY
z
Is the expansion valve heat-sensing
tube in the A/C unit securely
installed in the proper position?
Yes
Replace the expansion valve, then go to Step 20.
(Since the valve closes too much, replacement is
necessary.)
No
Install the heat-sensing tube securely in the proper
position, then go to Step 20.
INSPECT REFRIGERANT LINE
z
Inspect the refrigerant lines.
{
Is the piping free of damage
and cracks?
Yes Go to the next step.
2008 Mazda CX-9 Grand Touring
2008 HVAC Symptom Troubleshooting (HVAC) - Mazda CX-9
Microsoft
Sunday, November 15, 2009 10:14:51 AM
Page 23
© 2005 Mitchell Repair Information Company, LLC.
