Mazda CX-9 Grand Touring 2007 Manual page 888

2007 ENGINE PERFORMANCE Symptom Troubleshooting (MZI-3.5) - CX-9
operation.
(See ENGINE CONTROL SYSTEM
OPERATION INSPECTION [MZI-
3.5].)
Does the cooling fan control system
function properly?
5
Verify test results.
If normal, return to diagnostic index to service any additional symptoms.
(See ENGINE SYMPTOM TROUBLESHOOTING [MZI-3.5].)
If malfunction remains, inspect related Service Bulletins and/or On-line Repair
Information and perform repair or diagnosis.
NO.19 EXHAUST SMOKE [MZI-3.5]
DESCRIPTION AND POSSIBLE CAUSES
19 EXHAUST SMOKE
DESCRIPTION Blue, black, or white smoke from exhaust system
Blue smoke (Burning oil):
White smoke (Water in combustion):
2007 Mazda CX-9 Grand Touring
If vehicle is repaired, troubleshooting completed.
If vehicle is not repaired or additional diagnostic information is not
available, replace PCM.
(see PCM REMOVAL/INSTALLATION [MZI-3.5] .)
PCV valve malfunction
Engine internal oil leakage
Cooling system malfunction (coolant loss)
Engine internal coolant leakage
Inspect for both ECT PID and
temperature gauge on instrument
cluster readings.
If the temperature gauge on the
instrument cluster indicates normal
range but ECT PID is not the same
as temperature gauge reading,
inspect the CHT sensor.
If the temperature gauge on the
instrument cluster indicates cold
range but ECT PID is normal,
inspect the temperature gauge and
heat gauge unit.
No Repair or replace the malfunctioning
part.