Mazda CX-9 Grand Touring 2008, Руководство пользователя

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the engine and idle it.Access PSP PID.Is
PSP PID within specification?
8
Visually inspect the CKP sensor and teeth
of crankshaft pulley.
Are the CKP sensor and teeth of crankshaft
pulley normal?
Yes Go to the next step.
No Replace the malfunctioning part.
9
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.
10
Inspect the spark plug condition.
Is the 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 the spark plugs on original
cylinders.
Go to the next step.
11
Perform the electronic throttle control
system operation inspection.
(See
ENGINE CONTROL SYSTEM
OPERATION INSPECTION [MZI-
3.7] .)
Does the electronic throttle control system
function properly?
Yes Go to the next step.
No
Repair or replace the malfunctioning part
according to electronic throttle control
system operation inspection results.
12
Install fuel pressure gauge between fuel
pipe and fuel distributor.
Start the engine and run it at idle.
Measure fuel line pressure during idle.
Is fuel line pressure correct during idle?
(See
FUEL LINE PRESSURE
INSPECTION [MZI-3.7] .)
Yes Go to the next step.
No
Low:
Inspect the fuel line for clogging.
If there is no malfunction, replace 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] .)
13
Visually inspect for fuel leakage at fuel
injector, O-ring, and fuel line.
Service if necessary.
Does fuel line pressure hold after ignition
switch is turned off?
(See FUEL LINE PRESSURE
INSPECTION [MZI-3.7] .)
Yes Go to the next step.
No
Inspect fuel injector.
If fuel injector is normal, replace fuel
pump unit.
(See FUEL PUMP UNIT
REMOVAL/INSTALLATION [MZI-
3.7] .)
Yes Go to the next step.
2008 Mazda CX-9 Grand Touring
2008 ENGINE Symptom Troubleshooting (MZI-3.7) - Mazda CX-9
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Sunday, November 15, 2009 10:10:05 AM Page 45 © 2005 Mitchell Repair Information Company, LLC.