Mazda CX-9 Grand Touring 2009 Manual page 932

2008 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.7) - Mazda CX-9
Verify related Service Bulletins and/or
on-line repair information availability.
2
Is any related Service Bulletins
available?
INSPECT IAT SENSOR CONNECTOR
FOR POOR CONNECTION
Turn the ignition switch off.
Disconnect MAF/IAT sensor
3
connector.
Inspect for poor connection (such as
damaged/pulled-out pins, corrosion).
Are there any malfunction?
CLASSIFY IAT SENSOR
MALFUNCTION OR HARNESS
MALFUNCTION
Disconnect the MAF/IAT sensor
connector.
4
Turn the ignition switch to the ON
position (Engine off).
Measure voltage between MAF/IAT
sensor terminal F (wiring harness-side)
and body ground.
Is voltage 4.5-5.5 V?
INSPECT IAT SENSOR SIGNAL
CIRCUIT FOR SHORT TO POWER
SUPPLY
Turn the ignition switch to the ON
5
position (Engine off).
Measure voltage between MAF/IAT
sensor terminal F (wiring harness-side)
and body ground.
Is voltage B+?
INSPECT PCM CONNECTOR FOR
POOR CONNECTION
Turn the ignition switch off.
6
Disconnect PCM connector.
Inspect for poor connection (such as
damaged/pulled-out pins, corrosion).
Are there any malfunction?
2008 Mazda CX-9 Grand Touring
No
Repair or replace suspected part, then go to
Yes
Step 9.
No
Inspect the IAT sensor. (See INTAKE AIR
TEMPERATURE (IAT) SENSOR
Yes
INSPECTION [MZI-3.7] .)
Replace if necessary, then go to Step 9.
No
Repair or replace suspected part, then go to
Yes
Step 9.
No
Repair or replace suspected part, then go to
Yes
Step 9.
No
If the vehicle is not repaired, 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.
Go to the next step.