INSPECTION [MZI-3.7]
.)
3.7]
.)
23
Connect pressure gauges to A/C low and
high pressure side lines.Turn A/C on and
measure low side and high side
pressures.Are pressures within
specifications?(See
REFRIGERANT
PRESSURE CHECK
.)
NOTE:
z
The following test is for stall
concerns with the A/C on. If other
symptoms exist, go to the next
step.
Yes
Go to the next step.
No
If A/C is always on, go to symptom
troubleshooting "No.24 A/C is always on
or A/C compressor runs continuously".
(See
NO.24 A/C IS ALWAYS ON OR
A/C COMPRESSOR RUNS
CONTINUOUSLY [MZI-3.7]
.)
For other symptoms, inspect the following:
z
Refrigerant charging amount
z
Condenser fan operation
24
Disconnect the vacuum hose between the
purge solenoid valve and the intake
manifold from purge solenoid side.
Plug opening end of vacuum hose.
Start the engine.
Is the engine stall now eliminated?
Yes
Inspect if purge solenoid valve is stuck
open.
Inspect evaporative emission control
system.
No
Go to the next step.
25
Is air leakage felt or heard at intake-air
system components while racing the
engine to higher speed?
Yes
Repair or replace the malfunctioning part.
No
Go to the next step.
26
Inspect variable valve timing control
system operation.
(See
ENGINE CONTROL SYSTEM
OPERATION INSPECTION [MZI-
3.7]
.)
Does variable valve timing control
function properly?
Yes
Go to the next step.
No
Repair or replace the malfunctioning parts
according to variable valve timing control
system operation inspection results.
27 Is the engine compression correct?
Yes
Inspect the valve timing.
No
Inspect for cause.
28
z
Verify test results.
{
If normal, return to diagnostic index to service any additional symptoms.
(See
SYMPTOM DIAGNOSTIC INDEX [MZI-3.7]
.)
{
If malfunction remains, inspect related Service Bulletins and/or On-line Repair
Information and perform repair or diagnosis.
z
If vehicle is repaired, troubleshooting completed.
z
If vehicle is not repaired or additional diagnostic information is not available,
replace the PCM.
(See
PCM REMOVAL/INSTALLATION [MZI-3.7]
.)
2008 Mazda CX-9 Grand Touring
2008 ENGINE Symptom Troubleshooting (MZI-3.7) - Mazda CX-9
Microsoft
Sunday, November 15, 2009 10:10:05 AM
Page 32
© 2005 Mitchell Repair Information Company, LLC.
