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-3.7]
.)
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
z
Turn the ignition switch off.
z
Inspect the throttle actuator control motor for
damaged housing, wiring harness connector,
and wiring harness.
z
Are there any concerns with the throttle
actuator control motor hardware?
NOTE:
z
Make sure the throttle body connector is
properly connected.
Yes
Replace the throttle body. Then go to
Step 9.
No
Go to the next step.
INSPECT THROTTLE ACTUATOR
CONTROL CIRCUITS FOR SHORT EACH
OTHER
Yes 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 10:08:42 AM
Page 373
© 2005 Mitchell Repair Information Company, LLC.
