NO. 15 EMISSION COMPLIANCE [MZI-3.5]
DESCRIPTION AND POSSIBLE CAUSES
11
Is engine compression correct?
Yes
Inspect the valve timing.
No
Inspect for cause.
12
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 the PCM.
(see
PCM REMOVAL/INSTALLATION [MZI-3.5]
.)
15
EMISSION COMPLIANCE
DESCRIPTION
Fails emissions test.
z
Vacuum lines leakage or blockage
z
Cooling system malfunction
z
Spark plug malfunction
z
Leakage from intake manifold
z
Erratic or no signal from CMP sensor
z
Inadequate fuel pressure
z
PCV valve malfunction or incorrect valve installation
z
Exhaust system clogging
z
Fuel tank ventilation system malfunction
z
Fuel-filler cap malfunction
z
Charcoal canister damage
z
Air cleaner element clogging or restriction
z
Throttle body malfunction
z
Erratic signal to ignition coil
z
Improper air/fuel mixture ratio control operation
z
Bend or open circuit HO2S wiring harness
z
Catalyst converter malfunction
z
Engine internal parts malfunction
z
Excessive carbon is built up in combustion chamber
2007 Mazda CX-9 Grand Touring
2007 ENGINE PERFORMANCE Symptom Troubleshooting (MZI-3.5) - CX-9
Microsoft
Sunday, November 15, 2009 9:27:37 AM
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