3.5]
.)
11
Visually inspect for fuel leakage at fuel
injector O-ring and fuel line.
Service if necessary.
Is fuel line pressure held after ignition
switch is turned off?
(see
FUEL LINE PRESSURE
INSPECTION [MZI-3.5]
.)
Yes
Go to the next step.
No
Inspect the fuel injector.
If the fuel injector is normal, replace the
fuel pump unit.
(see
FUEL PUMP UNIT
REMOVAL/INSTALLATION [MZI-
3.5]
.)
12
Connect a pressure gauge to A/C low
and high pressure side lines.Turn the
A/C on and measure low side and high
side pressure.Are pressures within
specifications?(see
REFRIGERANT
PRESSURE CHECK
.)
NOTE:
z
The following test is for engine
stall with the A/C on. If other
symptom exists, go to the next
step.
Yes
Go to the next step.
No
If the 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
13
Inspect cruise control system.Is cruise
control system normal?
NOTE:
z
The following test should be
performed for symptom with
cruise control ON. If other
symptoms exist, go to the next
step.
Yes
Go to the next step.
No
Repair or replace the malfunctioning
part.
14
Inspect the front HO2S.
(see
FRONT HEATED OXYGEN
SENSOR (HO2S) INSPECTION
[MZI-3.5].
)
Is the front HO2S normal?
Yes
Go to the next step.
No
Replace the front HO2S.
(see
REAR HEATED OXYGEN
SENSOR (HO2S)
REMOVAL/INSTALLATION [MZI-
3.5].
)
15
Inspect the evaporative purge hose
between the fuel tank and the purge
valve.
Does fuel flow into evaporative purge
hose?
Yes
Inspect the check valve (two-way).
(see
FUEL TANK INSPECTION
[MZI-3.5]
.)
No
Go to the next step.
16
Disconnect the vacuum hose between
the purge solenoid valve and the intake
manifold from the purge solenoid
valve side.
Plug opening end of vacuum hose.
Yes
Go to the next step.
Inspect if the purge solenoid valve is
stuck open mechanically.
Inspect the evaporative emission control
system.
2007 Mazda CX-9 Grand Touring
2007 ENGINE PERFORMANCE Symptom Troubleshooting (MZI-3.5) - CX-9
Microsoft
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