Mazda CX-9 Grand Touring 2009 Manual page 1241

2008 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.7) - Mazda CX-9
Turn the ignition switch to the ON position
(Engine off).
Access the PCM and monitor the TP1 and
TP2 PIDs.
Slowly press the accelerator pedal from fully
released to fully depressed while observing
the voltage readings.
5
Use the chart as a reference.
Inspect the TP sensor.
(See THROTTLE POSITION (TP)
SENSOR INSPECTION [MZI-3.7] .)
Do all signal values smoothly change when
the accelerator is depressed?
INSPECT TP SENSOR CIRCUIT FOR
INTERMITTENT CONCERN
Access the PCM and monitor the TP1 and
6
TP2 PIDs.
Wiggle, shake, and bend the wiring harness
from the TP to the PCM.
Are the voltages between 0.49-4.65 V?
INSPECT THROTTLE ACTUATOR
CONTROL MOTOR VISUALLY
NOTE:
Make sure the throttle body connector is
properly connected.
7
Turn the ignition switch off.
Inspect the throttle actuator control motor for
damaged housing, wiring harness connector,
and wiring harness.
Are there any concerns with the throttle
actuator control motor hardware?
INSPECT THROTTLE ACTUATOR
CONTROL CIRCUITS FOR SHORT EACH
OTHER
8
Turn the ignition switch off.
Measure resistance between throttle actuator
2008 Mazda CX-9 Grand Touring
Yes Go to the next step.
No
Yes Go to the next step.
No
Yes
No
Yes Go to the next step.
No
Replace the throttle body. Then go to
Step 9.
Repair or replace suspected part, then go
to Step 9.
Replace the throttle body. Then go to
Step 9.
Go to the next step.
Repair or replace suspected part, then go