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Home › Mazda › 2011 › CX-9 Touring, 3.7 V, AWD › Repair and Diagnosis › Engine Performance › System › On-Board Diagnostic - Engine Control System (4 Of 5) › DTC P06B8: Internal Control Module Non-Volatile Random Access Memory (NVRAM) Error › Diagnostic procedure

Diagnostic procedure

DIAGNOSTIC PROCEDURE CHART

STEP INSPECTION ACTION
1 VERIFY FREEZE FRAME DATA HAS BEEN RECORDED 
  • Has FREEZE FRAME DATA been recorded?
 Yes Go to the next step.
No Record FREEZE FRAME DATA on the repair order, then go to the next step.
2 VERIFY RELATED REPAIR INFORMATION AVAILABILITY 
  • Verify related Service Bulletins and/or on-line repair information availability.
  • Is any related Service Bulletins available?
 Yes Perform repair or diagnosis according to the available Service Bulletins.
  • If the vehicle is not repaired, go to the next step.
No Go to the next step.
3 VERIFY RELATED PENDING CODE OR STORED DTCs 
  • Turn the ignition switch off, then to the ON position (engine off).
  • Verify the related PENDING CODE or stored DTCs using the M-MDS.
  • Is other DTCs present?
 Yes Go to the appropriate DTC troubleshooting. (See DTC TABLE .)
No Go to the next step.
4 INSPECT PCM FOR LATEST CALIBRATION 
  • Program the PCM to the latest calibration.
  • Turn the ignition switch to the ON position (Engine running).
  • Idle the engine.
  • Verify PENDING CODE or stored DTCs
  • Is the same DTC present?
 Yes Go to the next step.
No Troubleshooting complete.
5 INSPECT FOR CORRECT PCM OPERATION 
  • Disconnect all the PCM connectors.
  • Visually inspect for:
    • Pushed out pins
    • Corrosion
  • Connect all the PCM connectors and verify that they seat correctly.
  • Retrieve DTCs using the M-MDS.
  • Is the PENDING CODE for this DTC present?
 Yes Go to the next step.
No The system is correctly. Go to the next step.
6 VERIFY TROUBLESHOOTING OF DTC P06B8 HAS BEEN COMPLETED 
  • Verify that all disconnected connectors reconnected.
  • Clear the DTC from the PCM memory using the M-MDS.
  • Start the engine and drive the vehicle.
  • Verify PENDING CODE or stored DTCs.
  • Is the PENDING CODE for the DTC present?
 Yes Repeat the inspection from Step 1.
  • If the malfunction recurs, replace the PCM.

(See PCM REMOVAL/INSTALLATION .)
Go to the next step.
No Go to the next step.
7 VERIFY AFTER REPAIR PROCEDURE 
 Yes Go to the applicable DTC inspection.
(See DTC TABLE .)
No Troubleshooting completed.
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