Mazda CX-9 Grand Touring 2009 Manual page 1275

2008 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.7) - Mazda CX-9
APP2
APP3
ECT
5
MAF
TP_REL
VSS
Are the PIDs normal?
VERIFY CURRENT INPUT SIGNAL
STATUS UNDER FREEZE FRAME
DATA CONDITION
Connect the M-MDS to the DLC-2.
Verify the following PIDs under the
FREEZE FRAME DATA condition.
(See PCM INSPECTION [MZI-3.7] .)
6
APP1
APP2
APP3
ECT
MAF
TP_REL
Are the PIDs normal?
INSPECT INTAKE AIR SYSTEM FOR
EXCESSIVE AIR SUCTION
Visually inspect for looseness, cracks or
7
damage to the hoses in the intake-air
system.
Is there any malfunction?
VERIFY CURRENT INPUT SIGNAL
STATUS OF MAF SENSOR
Connect the M-MDS to the DLC-2.
Start the engine.
8
Access the MAF PID.
Verify that the MAF PID changes
quickly according to the engine speed.
Is the PID normal?
INSPECT FRONT HO2S
Inspect the front HO2S (RH) (with
2008 Mazda CX-9 Grand Touring
Inspect the malfunctioning part according to
No
Yes Go to the next step.
Inspect the malfunctioning part according to
No
Repair or replace the malfunctioning part, then
Yes
go to Step 13.
No
Yes Go to the next step.
Replace the MAF/IAT sensor, then go to Step
No
the inspection results. Then go to Step 13.
the inspection results. Then go to Step 13.
Go to the next step.
13.