z
Turn the ignition switch off.
z
Remove the air hose from the
throttle body.
z
Visually inspect for throttle plate
obstructions or sludge.
z
Slowly, push the throttle plate to
wide open and release.
z
Does the throttle plate move freely
to wide open and back?
5
INSPECT TP SENSOR OPERATION
z
Turn the ignition switch to the ON
position (Engine off).
z
Access the PCM and monitor the
TP1 and TP2 PIDs.
z
Slowly press the accelerator pedal
from fully released to fully
depressed while observing the
voltage readings.
z
Use the chart as a reference.
z
Inspect the TP sensor.
(see
THROTTLE POSITION
(TP) SENSOR INSPECTION
[MZI-3.5].
)
z
Do all signal values smoothly
change when the accelerator is
depressed?
Yes
Go to the next step.
No
Replace the throttle body. Then go to Step
9.
6
INSPECT TP SENSOR CIRCUIT
FOR INTERMITTENT CONCERN
z
Access the PCM and monitor the
TP1 and TP2 PIDs.
z
Wiggle, shake, and bend the
wiring harness from the TP to the
PCM.
z
Are the voltages between 0.49-
4.65 V?
Yes
Go to the next step.
No
Repair or replace suspected part, then go to
Step 9.
7
INSPECT THROTTLE ACTUATOR
CONTROL MOTOR VISUALLY
NOTE:
Yes
Replace the throttle body. Then go to Step
9.
2007 Mazda CX-9 Grand Touring
2007 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.5) - CX-9
Microsoft
Sunday, November 15, 2009 9:26:38 AM
Page 405
© 2005 Mitchell Repair Information Company, LLC.