2
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-3.7]
.)
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.
z
Disconnect PCM 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.
2008 Mazda CX-9 Grand Touring
2008 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.7) - Mazda CX-9
Microsoft
Sunday, November 15, 2009 10:08:35 AM
Page 68
© 2005 Mitchell Repair Information Company, LLC.
