z
Repair the vacuum leak.
z
Turn the ignition switch to the ON position
(Engine running)
z
Allow the engine to stabilize at the
temperature necessary to recreate the
concern.
z
Access the PCM and monitor the SHRTFT1
and SHRTFT2 PIDs.
z
Compare the recorded SHRTFT PID values,
prior to the no vacuum leak repair, to the
current SHRTFT PID values.
z
Is the decrease in the SHRTFT PIDs more
than 15%?
No A vacuum leak is still present. Go to Step
6.
8
INSPECT FUEL PRESSURE
z
Remove the jumper wire(s).
z
Connect the HO2S connector.
z
Relieve the fuel pressure.
z
Connect the mechanical fuel pressure gauge.
z
Pressurize the fuel system.
z
Turn the ignition switch to the ON position
(Engine running)
z
Allow the fuel pressure to stabilize.
z
Turn the ignition switch off.
z
Access the PCM and control the FP PID.
z
Run the fuel pump to obtain maximum fuel
pressure.
z
Is the fuel pressure within the range for the
vehicle being diagnosed?
WARNING:
z
Fuel line spills and leakage are dangerous.
Fuel can ignite and cause serious injuries
or death. Fuel can also irritate skin and
eyes. To prevent this, always complete the
"BEFORE REPAIR PROCEDURE".
NOTE:
z
For vehicle specific fuel pressure ranges,
refer to the "FUEL LINE PRESSURE
INSPECTION ".
Yes Go to Step 10.
No
Go to the next step.
2008 Mazda CX-9 Grand Touring
2008 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.7) - Mazda CX-9
Microsoft
Sunday, November 15, 2009 10:08:35 AM
Page 110
© 2005 Mitchell Repair Information Company, LLC.
