Mazda CX-9 Grand Touring 2009 Manual page 1279

2008 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.7) - Mazda CX-9
ECT
MAF
TP_REL
VSS
Are the PIDs normal?
VERIFY CURRENT INPUT SIGNAL
STATUS OF MAF SENSOR
Connect the M-MDS to the DLC-2.
Start the engine.
7
Access the MAF PID.
Verify that the MAF PID changes
quickly according to engine speed.
Is the PID normal?
INSPECT FRONT HO2S
Inspect the front HO2S (RH) (with
DTC P2195) or the front HO2S (LH)
(with DTC P2197).
8
(See FRONT HEATED OXYGEN
SENSOR (HO2S) INSPECTION
[MZI-3.7] .)
Is there any malfunction?
INSPECT FUEL INJECTOR
Inspect the fuel injector for the right
bank (with DTC P2196) or the left
bank (with DTC P2198).
9
(See FUEL INJECTOR
INSPECTION [MZI-3.7] .)
Is there any malfunction?
INSPECT FUEL LINE PRESSURE
Perform the "FUEL LINE
PRESSURE INSPECTION".
10
(See FUEL LINE PRESSURE
INSPECTION [MZI-3.7] .)
Is there any malfunction?
2008 Mazda CX-9 Grand Touring
Yes Go to the next step.
No Replace the MAF/IAT sensor, then go to Step 11.
Inspect the related wiring harnesses
Yes If there is no malfunction
Replace the HO2S, then go to Step 11.
No
Replace the suspected fuel injector, then go to
Yes Step 11. (See FUEL INJECTOR
REMOVAL/INSTALLATION [MZI-3.7] .)
No
Replace the malfunctioning part. Go to the next
Yes
step.
No
Go to the next step.
Go to the next step.
Go to the next step.