
NO.19 EXHAUST SMOKE [MZI-3.5]
DESCRIPTION AND POSSIBLE CAUSES
operation.
(See
ENGINE CONTROL SYSTEM
OPERATION INSPECTION [MZI-
3.5]
.)
Does the cooling fan control system
function properly?
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.
5
z
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.
z
If vehicle is repaired, troubleshooting completed.
z
If vehicle is not repaired or additional diagnostic information is not
available, replace PCM.
(see
PCM REMOVAL/INSTALLATION [MZI-3.5]
.)
19
EXHAUST SMOKE
DESCRIPTION
Blue, black, or white smoke from exhaust system
Blue smoke (Burning oil):
z
PCV valve malfunction
z
Engine internal oil leakage
White smoke (Water in combustion):
z
Cooling system malfunction (coolant loss)
z
Engine internal coolant leakage
2007 Mazda CX-9 Grand Touring
2007 ENGINE PERFORMANCE Symptom Troubleshooting (MZI-3.5) - CX-9
Microsoft
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