Mazda CX-9 Grand Touring 2009 Manual page 1352

NO.13 KNOCKING/PINGING-ACCELERATION/CRUISE [MZI-3.7]
NO.13 KNOCKING/PINGING-ACCELERATION/CRUISE (MZI-3.7) DETECTION CONDITIONS
AND POSSIBLE CAUSES
13 KNOCKING/PINGING - ACCELERATION/CRUISE
Sound is heard when air/fuel mixture is ignited by something other than spark plug
DESCRIPTION
(such as hot spot in combustion chamber).
POSSIBLE
CAUSE
2008 Mazda CX-9 Grand Touring
2008 ENGINE Symptom Troubleshooting (MZI-3.7) - Mazda CX-9
If vehicle is repaired, troubleshooting completed.
If vehicle is not repaired or additional diagnostic information is not available,
replace the PCM.
(See PCM REMOVAL/INSTALLATION [MZI-3.7] .)
Engine overheating due to cooling system malfunction
CHT sensor malfunction
IAT sensor malfunction
MAF sensor malfunction
Knock sensor malfunction
Erratic signal from CMP sensor
Inadequate engine compression
Inadequate fuel pressure
WARNING:
The following troubleshooting flow chart contains the fuel system diagnosis
and repair procedures. Read the following warnings before servicing the fuel
system:
Fuel vapor is hazardous. It can easily ignite, causing serious injury
and damage. Always keep sparks and flames away from fuel.
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:
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