NO.6 CRANKS NORMALLY BUT WILL NOT START [MZI-3.5]
DESCRIPTION AND POSSIBLE CAUSES
Does variable valve timing control
function properly?
results.
27
Is the engine compression correct?
Yes
Inspect the valve timing.
No
Inspect for cause.
28
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]
.)
6
CRANKS NORMALLY BUT WILL NOT START
DESCRIPTION
z
The starter cranks engine at normal speed but the engine will not run.
z
Refer to symptom troubleshooting "
NO.5 ENGINE STALLS
" if this
symptom appears after engine stall.
z
Fuel is in tank. Battery is in normal condition.
z
No battery power supply to PCM
z
Air leakage from intake-air system
z
Open PCM GND or vehicle body GND
z
Improper operation of electronic throttle control system
z
No signal from CKP sensor due to sensor, related wire or incorrect
installation
z
No signal from CMP sensor due to sensor, related wire or incorrect
installation
z
Low engine compression
z
Engine overheating
z
Vacuum leakage
z
Erratic signal to ignition coil
z
Improper air/fuel mixture ratio control
z
Poor fuel quality
z
PCV valve malfunction
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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