DTC P0068 [MZI-3.5]
DTC P0068 (MZI-3.5) DETECTION CONDITION AND POSSIBLE CAUSES
Go to Step 9.
8
INSPECT HO2S CASE FOR SHORT
TO POWER SUPPLY, HTR, AND
SIGNRTN
z
Measure the resistance between
the suspect HO2S terminal A and
D on the component side.
z
Measure the resistance between
the suspect HO2S terminal A and
body ground.
z
Is the resistance more than 10
kilohms?
Yes
Replace the PCM. Go to the next step.
No
Replace the HO2S.
(See
FRONT HEATED OXYGEN
SENSOR
.)
(HO2S) REMOVAL/INSTALLATION
[MZI-3.5].)
(See
REAR HEATED OXYGEN
SENSOR
.)
(HO2S) REMOVAL/INSTALLATION
[MZI-3.5].)
Go to the next step.
9
VERIFY TROUBLESHOOTING OF
MISFIRE DTC HAS BEEN
COMPLETED
z
Verify that all disconnected
connectors reconnected.
z
Turn the ignition switch to the ON
position (Engine off).
z
Clear the DTC from the PCM
memory using the M-MDS.
z
Start the engine and run it at idle.
z
Retrieve DTCs using the M-MDS.
z
Is the PENDING CODE for this
DTC present?
Yes
Replace the PCM, then go to the next step.
(see
PCM
REMOVAL/INSTALLATION [MZI-
3.5]
.)
No
Go to the next step.
10
VERIFY AFTER REPAIR
PROCEDURE
z
Perform "AFTER REPAIR
PROCEDURE".
(See
AFTER REPAIR
PROCEDURE [MZI-3.5]
.)
z
Are any DTC present?
Yes
Go to the applicable DTC inspection.
(See
DTC TABLE [MZI-3.5]
.)
No
Troubleshooting completed.
DTC P0068
MAP/MAF-throttle position correlation
z
The PCM monitors a vehicle operation rationality check by comparing
2007 Mazda CX-9 Grand Touring
2007 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.5) - CX-9
Microsoft
Sunday, November 15, 2009 9:26:29 AM
Page 47
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