Mazda CX-9 Grand Touring 2009 Manual page 912

2008 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.7) - Mazda CX-9
Is the resistance between 3-30
ohms?
INSPECT HO2S CASE FOR SHORT
TO POWER SUPPLY, HTR, AND
SIGNRTN
Measure the resistance between the
suspect HO2S terminal A and D on
8
the component side.
Measure the resistance between the
suspect HO2S terminal A and body
ground.
Is the resistance more than 10
kilohms?
VERIFY TROUBLESHOOTING OF
MISFIRE DTC HAS BEEN
COMPLETED
Verify that all disconnected
connectors reconnected.
Turn the ignition switch to the ON
9
position (Engine off).
Clear the DTC from the PCM
memory using the M-MDS.
Start the engine and run it at idle.
Retrieve DTCs using the M-MDS.
Is the PENDING CODE for this
DTC present?
VERIFY AFTER REPAIR
PROCEDURE
Perform "AFTER REPAIR
PROCEDURE".
10
(See AFTER REPAIR
PROCEDURE [MZI-3.7].)
Are any DTC present?
DTC P0068 [MZI-3.7]
DTC P0068 (MZI-3.7) DETECTION CONDITIONS AND POSSIBLE CAUSES
DTC P0068 MAP/MAF-throttle position correlation
2008 Mazda CX-9 Grand Touring
(HO2S) REMOVAL/INSTALLATION [MZI-
Yes Replace the PCM. Go to the next step.
(See FRONT HEATED OXYGEN SENSOR
(HO2S) REMOVAL/INSTALLATION [MZI-
No
(See REAR HEATED OXYGEN SENSOR
(HO2S) REMOVAL/INSTALLATION [MZI-
Replace the PCM, then go to the next step. (See
Yes PCM REMOVAL/INSTALLATION [MZI-
3.7] .)
No
Go to the applicable DTC inspection., (See DTC
Yes
TABLE [MZI-3.7].)
No
3.7] .) Go to Step 9.
Replace the HO2S.
3.7] .)
3.7] .) Go to the next step.
Go to the next step.
Troubleshooting completed.