Mazda CX-9 Grand Touring 2007 Manual page 395

2007 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.5) - CX-9
DETECTION
CONDITION
POSSIBLE CAUSE
DIAGNOSTIC PROCEDURE
DTC P0068 (MZI-3.5) DIAGNOSTIC PROCEDURE
STEP
1 VERIFY FREEZE FRAME DATA
HAS BEEN RECORDED
Has FREEZE FRAME DATA
been recorded?
2 VERIFY RELATED REPAIR
INFORMATION AVAILABILITY
Verify related Service Bulletins
availability.
Is any related Service Bulletins
available?
3 VERIFY RELATED PENDING
CODE OR STORED DTC
Verify the related PENDING
CODE or stored DTCs.
Are other DTCs present?
4 INSPECT FOR INLET AIR LEAKS
Listen for air noise around the
MAF sensor and throttle body
while the engine is running.
Is a concern present?
5 INSPECT FOR TP2 SIGNAL HIGH
VERSUS LOAD WHILE DRIVING
THE VEHICLE
Turn the ignition switch to the ON
position (Engine running).
Access the TP2 and LOAD PIDs
using the M-MDS.
2007 Mazda CX-9 Grand Touring
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.
No Record FREEZE FRAME DATA on the
repair order, then go to next step.
Yes Perform repair or diagnosis according to
available Service Bulletins.
If vehicle is not repaired, go to next
step.
No Go to next step.
Yes Go to appropriate DTC inspection.
(See DTC TABLE [MZI-3.5].)
No Go to next step.
Yes Repair as necessary. Go to Step 8.
No Go to next step.
Yes Replace the malfunctioning part, then go
to Step 8.
No Go to next step.