DIAGNOSTIC PROCEDURE
NO.5 ENGINE STALLS-AFTER START/AT IDLE (MZI-3.7) DIAGNOSTIC PROCEDURE
POSSIBLE
CAUSE
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 SERVICE
PRECAUTION" and "AFTER SERVICE PRECAUTION" described in this
manual.
(See BEFORE SERVICE PRECAUTION [MZI-3.7] .)
(See AFTER SERVICE PRECAUTION [MZI-3.7] .)
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
1
Connect the M-MDS to the DLC-2.
Do the following conditions appear?
z
The engine is not completely started.
z
DTC P1260 is displayed.
Yes
Both conditions appear:
Go to Step 3.
No
Either or other condition appears:
Go to the next step.
Yes
Go to the next step.
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 26
© 2005 Mitchell Repair Information Company, LLC.
