Mazda CX-9 Grand Touring 2008, Руководство пользователя

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15
crankshaft pulley.
Are CKP sensor and teeth of crankshaft
pulley normal?
Yes Go to the next step.
No Replace the malfunctioning part.
16
Inspect the ignition coil related wiring
harness condition (intermittent open or
short circuit) for all cylinders. Are wiring
harness conditions normal?
Yes Go to the next step.
No Repair the wiring harnesses.
17
Perform the spark test.
(See ENGINE CONTROL SYSTEM
OPERATION INSPECTION [MZI-
3.7] .)
Is strong blue spark visible at each
cylinder?
Yes
Go to the next step.
If symptoms occurs with the A/C on, go to
Step 23.
No
Repair or replace the malfunctioning part
according to spark test result.
18
Inspect the spark plug condition.
Is spark plug wet, covered with carbon or
grayish white?
Yes
Spark plug is wet or covered with
carbon:
Inspect for fuel leakage from injector.
Spark plug is grayish white:
Inspect the fuel injector for clogging.
No
Install spark plugs on original cylinders.
Go to the next step.
19
Remove and shake the PCV valve.
Does the PCV valve rattle?
Yes Go to the next step.
No Replace the PCV valve.
20 visually inspect the exhaust system part.
Is there any deformed exhaust system part?
Yes Replace the suspected part.
No Go to the next step.
21
Install the fuel pressure gauge between the
fuel pipe and the fuel distributor.
Short check connector terminal F/P to body
GND using a jumper wiring.
Turn the ignition switch to the ON
position.
Is fuel line pressure correct with ignition
switch ON?
(See
FUEL LINE PRESSURE
INSPECTION [MZI-3.7] .)
Yes Go to the next step.
No
Zero or low:
Inspect the fuel pump relay and fuel pump
circuit.
Inspect the fuel line for clogging.
If there is no malfunction, replace the fuel
pump unit.
(See FUEL PUMP UNIT
REMOVAL/INSTALLATION [MZI-
3.7] .)
High:
Replace the fuel pump unit.
(See FUEL PUMP UNIT
REMOVAL/INSTALLATION [MZI-
3.7] .)
22
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
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-
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 31 © 2005 Mitchell Repair Information Company, LLC.