DTC P0068:00 [MZI-3.7]
id0102d2311400
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DTC P0068:00 |
MAP/MAF-throttle position correlation |
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DETECTION CONDITION
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• 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.
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POSSIBLE CAUSE
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• Air leak between MAF sensor and throttle body
• TP sensor or MAF sensor malfunction
• TP sensor not seated correctly
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Diagnostic procedure
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STEP |
INSPECTION |
ACTION |
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1
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VERIFY FREEZE FRAME DATA HAS BEEN RECORDED
• Has FREEZE FRAME DATA been recorded?
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Yes
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Go to the next step.
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No
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Record FREEZE FRAME DATA on the repair order, then go to the next step.
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2
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VERIFY RELATED SERVICE INFORMATION AVAILABILITY
• Verify related Service Information availability.
• Is any related Service Information available?
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Yes
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Perform repair or diagnosis according to the available Service Information.
• If the vehicle is not repaired, go to the next step.
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No
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Go to the next step.
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3
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VERIFY RELATED PENDING CODE OR STORED DTC
• Verify the related PENDING CODE or stored DTCs.
• Are other DTCs present?
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Yes
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Go to appropriate DTC inspection.
(See DTC TABLE [MZI-3.7].)
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No
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Go to the next step.
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4
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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?
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Yes
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Repair as necessary, then go to Step 8.
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No
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Go to the next step.
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5
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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.
• Is the TP2 PID more than 2.44 V and the LOAD PID less than 30%?
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Yes
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Replace the malfunctioning part, then go to Step 8.
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No
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Go to the next step.
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6
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INSPECT FOR TP2 SIGNAL LOW VERSUS LOAD WHILE DRIVING THE VEHICLE
• Turn the ignition switch to the ON position (Engine running).
• Access the PCM and monitor the TP2 and LOAD PIDs
• Is the TP2 PID less than 0.24 V and the LOAD PID more than 55%?
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Yes
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Repair or replace the malfunctioning part, then go to Step 8.
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No
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Go to the next step.
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7
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INSPECT FOR SELF-TEST DTCS
• Turn the ignition switch to the ON position (Engine running).
• Clear DTC from memory using M-MDS.
• Drive the vehicle while exercising the throttle.
• Retrieve the continuous memory DTCs.
• Are any DTCs present?
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Yes
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Replace the malfunctioning part, then go to the next step.
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No
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Perform the “INTERMITTENT CONCERN TROUBLESHOOTING”. Then go to the next step.
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8
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VERIFY TROUBLESHOOTING OF DTC P0068:00 HAS BEEN COMPLETED
• Verify that all disconnected connectors reconnected.
• Clear DTC from memory using M-MDS.
• Start engine.
• Perform the KOEO or KOER self-test.
• Is same DTC present?
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Yes
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Repeat the inspection from Step 1.
• If the malfunction recurs, replace the PCM.
Go to the next step.
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No
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Go to the next step.
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9
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VERIFY AFTER REPAIR PROCEDURE
• Perform the “AFTER REPAIR PROCEDURE”.
• Are any DTCs present?
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Yes
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Go to the applicable DTC inspection.
(See DTC TABLE [MZI-3.7].)
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No
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Troubleshooting completed.
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