Mazda CX-9 Grand Touring 2008, Manual

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11
Connect pressure gauge to the A/C low and
high side pressure lines.Turn the A/C on
and measure low side and high side
pressures.Are pressures within
specifications?(See REFRIGERANT
PRESSURE CHECK .)
other symptoms exist, go to the
next step.
No
(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
12
Inspect for A/C cut-off operation.
(See
ENGINE CONTROL SYSTEM
OPERATION INSPECTION [MZI-3.7] .)
Does the A/C cut-off function properly?
Yes Go to the next step.
No Inspect A/C cut-off system components.
13
Disconnect the vacuum hose between the
purge solenoid valve and the intake
manifold from purge solenoid valve side.
Plug opening end of vacuum hose.
Drive the vehicle.
Does the engine condition improve?
Yes
Inspect if purge solenoid valve is stuck
open mechanically.
Inspect the evaporative emission control
system.
(See
ENGINE CONTROL SYSTEM
OPERATION INSPECTION [MZI-
3.7]
.)
No Go to the next step.
14
Visually inspect the CMP sensor and
projections of camshaft pulley.
Are the CMP sensor and projections of
camshaft pulley normal?
Yes Go to the next step.
No Replace the malfunctioning part.
15
Inspect the variable valve timing control
system operation.
(See
ENGINE CONTROL SYSTEM
OPERATION INSPECTION [MZI-3.7] .)
Does the variable valve timing control
system function properly?
Yes Go to the next step.
No
Repair or replace the malfunctioning part
according to variable valve timing control
system inspection results.
16 Is the engine compression correct?
Yes
Inspect the following:
z
Valve timing
z
Internal transaxle components
z
Brake system for dragging
No Inspect for cause.
17
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.
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 60 © 2005 Mitchell Repair Information Company, LLC.