Mazda CX-9 Grand Touring 2009 Manual page 1327

2008 ENGINE Symptom Troubleshooting (MZI-3.7) - Mazda CX-9
Is there any malfunction?
Inspect the following wiring harnesses
and connectors for an open or short
circuit:
Between keyless control module
terminal 3W and instrument
cluster terminal 1W
7
Between keyless control module
terminal 3X and instrument cluster
terminal 1X
Is there any malfunction?
Inspect the following wiring harnesses
and connectors:
Between PCM terminal 1BG and
instrument cluster terminal 1W
8
Between PCM terminal 1BL and
instrument cluster terminal 1X
Is there any malfunction?
Verify the following:
Vacuum connection
External fuel shut off or accessory
(such as kill switch, alarm)
Fuel quality: proper octane,
contamination, winter/summer
blend
No air leakage from intake-air
system
9
Intake-air system restriction (such
as air cleaner element, fresh air
duct)
Proper sealing of intake manifold
and components attached to intake
manifold
Ignition wiring
Electrical connections
Fuses
Smooth operation of throttle valve
2008 Mazda CX-9 Grand Touring
Repair or replace wiring harness and
Yes
connectors.
No
Repair or replace the suspected wiring
Yes
harness and connector.
No
Yes Go to the next step.
No
Go to the next step.
Go to the next step.
Service if necessary.
Repeat Step 9.