ignition switch to ON position?
(see
FUEL LINE PRESSURE
INSPECTION [MZI-3.5]
.)
(see
FUEL PUMP UNIT
REMOVAL/INSTALLATION [MZI-
3.5]
.)
High:
Replace the fuel pump unit.
(see
FUEL PUMP UNIT
REMOVAL/INSTALLATION [MZI-
3.5]
.)
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
.)
NOTE:
z
The following test is for engine
stalling with the A/C on
concern. 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-3.5]
.)
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-
3.5]
.)
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-
3.5]
.)
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-
3.5]
.)
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.
2007 Mazda CX-9 Grand Touring
2007 ENGINE PERFORMANCE Symptom Troubleshooting (MZI-3.5) - CX-9
Microsoft
Sunday, November 15, 2009 9:27:37 AM
Page 57
© 2005 Mitchell Repair Information Company, LLC.