z
Measure the voltage between fuel pump
connector terminal B (wiring harness-
side) and body ground.
z
Is the voltage more than 10 V?
No
Step 11.
8
INSPECT FUEL PRESSURE LEAK
z
Connect the mechanical fuel pressure
gauge.
z
Turn the ignition switch to the ON
position (Engine off)
z
Access the PCM and control the FP
PID.
z
Run the fuel pump to obtain maximum
fuel pressure.
z
Command the fuel pump off.
z
Allow the fuel pressure to stabilize.
z
Record the stabilized reading.
z
Monitor the fuel pressure for 1 min.
z
Does the fuel pressure remain within 34
kPa {255 mmHg, 10.0 inHg} of the
recorded reading after 1 min?
NOTE:
z
When the fuel pump is commanded
off, the fuel pressure may
substantially decrease and then
stabilize.
NOTE:
z
During output state control, the fuel
pump stays commanded on for only
approx. 5 s.
Yes Perform the KOEO self-test. Go to Step 10.
No
Go to the next step.
9
INSPECT FUEL INJECTOR
OPERATION
z
Remove the fuel injector.
z
Inspect the fuel injector operation.
z
Is the fuel injector normal?
Yes Go to the next step.
No
Replace the fuel injector, then go to Step 11.
INSPECT FUEL SUPPLY LINE FOR
RESTRICTION
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 104
© 2005 Mitchell Repair Information Company, LLC.
