z
Verify related Service Bulletins
and/or on-line repair information
availability.
z
Is any related Service Bulletins
available?
z
If the vehicle is not repaired, go to
the next step.
No
Go to the next step.
3
INSPECT IAT SENSOR
CONNECTOR FOR POOR
CONNECTION
z
Turn the ignition switch off.
z
Disconnect MAF/IAT sensor
connector.
z
Inspect for poor connection (such
as damaged/pulled-out pins,
corrosion).
z
Are there any malfunction?
Yes
Repair or replace suspected part, then go to
Step 9.
No
Go to the next step.
4
CLASSIFY IAT SENSOR
MALFUNCTION OR HARNESS
MALFUNCTION
z
Disconnect the MAF/IAT sensor
connector.
z
Turn the ignition switch to the ON
position (Engine off).
z
Measure voltage between
MAF/IAT sensor terminal F
(wiring harness-side) and body
ground.
z
Is voltage
4.5-5.5 V?
Yes
Inspect the IAT sensor.
(see
INTAKE AIR TEMPERATURE
(IAT) SENSOR INSPECTION [MZI-
3.5].
)
Replace if necessary, then go to Step 9.
No
Go to the next step.
5
INSPECT IAT SENSOR SIGNAL
CIRCUIT FOR SHORT TO POWER
SUPPLY
z
Turn the ignition switch to the ON
position (Engine off).
z
Measure voltage between
MAF/IAT sensor terminal F
(wiring harness-side) and body
ground.
z
Is voltage
B+
?
Yes
Repair or replace suspected part, then go to
Step 9.
No
Go to the next step.
6
INSPECT PCM CONNECTOR FOR
POOR CONNECTION
z
Turn the ignition switch off.
Yes
Repair or replace suspected part, 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 9:26:29 AM
Page 68
© 2005 Mitchell Repair Information Company, LLC.