Mazda CX-9 Grand Touring 2009 Manual page 913

2008 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.7) - Mazda CX-9
DETECTION
CONDITION
POSSIBLE
CAUSE
DIAGNOSTIC PROCEDURE
DTC P0068 (MZI-3.7) DIAGNOSTIC PROCEDURE
STEP
VERIFY FREEZE FRAME DATA HAS
BEEN RECORDED
1
Has FREEZE FRAME DATA been
recorded?
VERIFY RELATED REPAIR
INFORMATION AVAILABILITY
Verify related Service Bulletins
2
availability.
Is any related Service Bulletins
available?
VERIFY RELATED PENDING CODE OR
STORED DTC
3
Verify the related PENDING CODE or
stored DTCs.
Are other DTCs present?
INSPECT FOR INLET AIR LEAKS
Listen for air noise around the MAF
4
sensor and throttle body while the engine
is running.
Is a concern present?
INSPECT FOR TP2 SIGNAL HIGH
VERSUS LOAD WHILE DRIVING THE
CVEHICLE
5
Turn the ignition switch to the ON
position (Engine running).
Access the TP2 and LOAD PIDs using
2008 Mazda CX-9 Grand Touring
The PCM monitors a vehicle operation rationality check by comparing sensed
throttle position to mass air flow readings. If during a KOER self-test, the
comparison of the TP sensor and MAF sensor readings are not consistent with
the calibrated load values, test fails and a DTC is stored in continuous memory.
Air leak between MAF sensor and throttle body
TP sensor or MAF sensor malfunction
TP sensor not seated correctly
INSPECTION ACTION
Yes Go to next step.
Record FREEZE FRAME DATA on the
No
repair order, then go to next step.
Perform repair or diagnosis according to
available Service Bulletins.
Yes
If vehicle is not repaired, go to next
step.
No Go to next step.
Go to appropriate DTC inspection. (See DTC
Yes
TABLE [MZI-3.7].)
No Go to next step.
Yes Repair as necessary. Go to Step 8.
No Go to next step.
Replace the malfunctioning part, then go to
Yes
Step 8.