Mazda CX-9 Grand Touring 2009 Manual page 921

2008 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.7) - Mazda CX-9
been recorded?
VERIFY RELATED REPAIR
INFORMATION AVAILABILITY
Verify related Service Bulletins
2
and/or on-line repair
information availability.
Is any related Service Bulletins
available?
INSPECT MAF SENSOR
CONNECTOR FOR POOR
CONNECTION
Turn the ignition switch off.
Disconnect the MAF/IAT
3
sensor connector.
Inspect for poor connection
(such as damaged/pulled-out
pins, corrosion).
Are there any malfunction?
INSPECT MAF SIGNAL
CIRCUIT FOR SHORT TO
POWER SUPPLY
Turn the ignition switch to the
4
ON position (Engine off).
Measure voltage between MAF
sensor terminal D (wiring
harness-side) and body ground.
Is voltage B+?
INSPECT PCM CONNECTOR
FOR POOR CONNECTION
Turn the ignition switch off.
Disconnect PCM connector.
5
Inspect for poor connection
(such as damaged/pulled-out
pins, corrosion).
Are there any malfunction?
INSPECT THE MAF SENSOR
6
Inspect the MAF sensor. (See
MASS AIR FLOW (MAF)
SENSOR INSPECTION
2008 Mazda CX-9 Grand Touring
Perform repair or diagnosis according to the available
Service Bulletins.
Yes
If the vehicle is not repaired, go to the next step.
No
Yes Repair or replace suspected part, then go to Step 7.
No
No Repair or replace suspected part, then go to Step 7.
Yes
No Repair or replace suspected part, then go to Step 7.
Yes
Replace the MAF/IAT sensor (See MASS AIR FLOW
(MAF)/INTAKE AIR TEMPERATURE (IAT)
Yes
SENSOR REMOVAL/INSTALLATION [MZI-
3.7] .), then go to Step 7.
then go to the next step.
Go to the next step.
Go to the next step.
Go to the next step.
Go to the next step.