z
Turn the ignition switch to the ON
position (Engine running).
z
Access the PCM and monitor the
ECT, CHT and IAT PIDs.
z
Access the PCM and monitor the
LONGFT1, SHRTFT1,
LONGFT2 and SHRTFT2 PIDs.
z
Allow the engine to stabilize at the
temperature necessary to recreate
the concern.
z
Add and record the LONGFT PID
value to the SHRTFT PID value
for each bank, correction at idle.
z
Increase the engine speed to 2,500
rpm for 10 s. Record the
LONGFT1, SHRTFT1,
LONGFT2, and system SHRTFT2
PID values.
z
Add and record the LONGFT PID
value to the SHRTFT PID value
for each bank, correction at 2,500
rpm.
z
Is the total fuel correction value
difference between idle and 2,500
engine load, when the vacuum
leak represents a small portion
of the total air flow
z
When calculating the total fuel
correction in the following
steps, if LONGFT1 13%
and SHRTFT1 23%, the
total fuel correction for bank 1
36%. If LONGFT2 equals
+24% and SHRTFT2 equals -3%
the total fuel correction for bank
2 21%.
z
If the freeze frame ECT PID is
available, stabilize the engine at
the temperature recorded by the
freeze frame ECT PID. If the
freeze frame ECT PID is not
available, maintain the engine
coolant temperature between 82-
101 °C {180-215 °F} and the
intake air temperature at less
than 46 °C {115°F}.
No
Go to the next step.
2007 Mazda CX-9 Grand Touring
2007 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.5) - CX-9
Microsoft
Sunday, November 15, 2009 9:26:30 AM
Page 112
© 2005 Mitchell Repair Information Company, LLC.
