Mazda CX-9 Grand Touring 2007 Manual page 901

2007 ENGINE PERFORMANCE Symptom Troubleshooting (MZI-3.5) - CX-9
POSSIBLE CAUSE
DIAGNOSTIC PROCEDURE
DIAGNOSTIC PROCEDURE
STEP INSPECTION
1 Are any driveability or exhaust smoke
concerns present?
2 Inspect the following:
Electrical connections
Vacuum lines
Fuel quality
Are all items normal?
3 Connect the M-MDS to the DLC-2.
Turn the ignition switch to the ON
position (Engine off).
Retrieve any DTCs.
Are there any DTCs displayed?
4 Install the fuel pressure gauge between
the fuel pipe and the fuel distributor.
Start engine and idle it.
2007 Mazda CX-9 Grand Touring
WARNING:
The following troubleshooting flow chart contains fuel system diagnosis
and repair procedures. Read following warnings before servicing fuel
system:
Fuel vapor is hazardous. It can easily ignite, causing serious injury
and damage. Always keep sparks and flames away from fuel.
Fuel line spills and leakage are dangerous. Fuel can ignite and
cause serious injuries or death and damage. Fuel can also irritate
skin and eyes. To prevent this, always complete "BEFORE REPAIR
PROCEDURE" and "AFTER REPAIR PROCEDURE" described in
this manual.
(see BEFORE REPAIR PROCEDURE [MZI-3.5] .)
(see AFTER REPAIR PROCEDURE [MZI-3.5] .)
CAUTION:
Disconnecting/connecting quick release connector without
cleaning it may cause damage to fuel pipe and quick release
connector. Always clean quick release connector joint area before
disconnecting/connecting, and make sure that it is free of foreign
material.
RESULTS ACTION
Yes Go to the appropriate flow chart.
No Go to the next step.
Yes Go to the next step.
No Service if necessary.
Repeat Step 2.
Yes DTC is displayed:
Go to the appropriate DTC inspection.
(see DTC TABLE [MZI-3.5] .)
No No DTC is displayed:
Go to the next step.
Yes Go to the next step.
No Low: