NO.12 LACK/LOSS OF POWER-ACCELERATION/CRUISE [MZI-3.5]
DESCRIPTION AND POSSIBLE CAUSES
Drive the vehicle.
Does the engine condition improve?
No
Go to the next step.
17
Visually inspect the CMP sensor and
projections of camshaft pulley.
Are CMP sensor and projections of
camshaft pulley normal?
Yes
Go to the next step.
No
Replace the malfunctioning part.
18
Is the engine compression correct?
Yes
Inspect the following:
z
Valve timing
z
Internal transaxle part
z
Engine mounts
z
Check valve (two-way)
No
Inspect for cause.
19
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]
.)
12
LACK/LOSS OF POWER-ACCELERATION/CRUISE
DESCRIPTION
Performance is poor under load (such as power down when climbing hills).
z
Improper A/C system operation
z
Erratic signal or no signal from CMP sensor
z
Air leakage from intake-air system parts
z
Restriction in intake-air system
z
Intake air temperature too hot
z
Improper operation of electronic throttle control system
z
Purge control solenoid malfunction
z
Brake dragging
z
Erratic signal from CKP sensor
z
Low engine compression
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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