DIAGNOSTIC PROCEDURE
DIAGNOSTIC PROCEDURE
POSSIBLE CAUSE
z
Electrical connector disconnection
z
Open or short circuit in fuel pump body and related wiring harness
z
No battery power supply to PCM or poor GND
z
Inadequate fuel pressure
z
Fuel pump body mechanical malfunction
z
Fuel leakage from fuel injector
z
Fuel injector clogging
z
Ignition coil malfunction
z
Improper air/fuel mixture ratio control
z
Improper valve timing
z
Improper operation variable valve timing control system
z
Immobilizer system and/or circuit malfunction
z
Immobilizer system operating property. (Ignition key is not registered.)
z
Pressure regulator malfunction (built-in fuel pump unit)
WARNING:
The following troubleshooting flow chart contains the fuel system
diagnosis and repair procedures. Read the following warnings before
servicing the fuel system:
z
Fuel vapor is hazardous. It can easily ignite, causing serious injury
and damage. Always keep sparks and flames away from fuel.
z
Fuel line spills and leakage are dangerous. Fuel can ignite and
cause serious injuries or death and damage. Fuel can also irritate
skin and eyes. To prevent this, always complete "BEFORE REPAIR
PROCEDURE" and "AFTER REPAIR PROCEDURE" described in
this manual.
(see BEFORE REPAIR PROCEDURE [MZI-3.5] .)
(see AFTER REPAIR PROCEDURE [MZI-3.5] .)
CAUTION:
z
Disconnecting/connecting quick release connector without
cleaning it may cause damage to fuel pipe and quick release
connector. Always clean quick release connector joint area before
disconnecting/connecting, and make sure that it is free of foreign
material.
STEP INSPECTION
RESULTS ACTION
2007 Mazda CX-9 Grand Touring
2007 ENGINE PERFORMANCE Symptom Troubleshooting (MZI-3.5) - CX-9
Microsoft
Sunday, November 15, 2009 9:27:36 AM
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© 2005 Mitchell Repair Information Company, LLC.