4. Reprogram the PCM with the Mazda Modular Diagnostic System (M-MDS), using Mazda Diagnostic And Repair Software (MDARS). Refer to “MDARS – ECU Reprogramming Procedure”.
NOTE: If current calibration file name in the ECU FILENAME screen is same as shown in Calibration Information or with a later suffix, reprogramming is not necessary.
5. Clear the DTC and turn the ignition off and get out of the vehicle.
6. Close and lock the door and wait for at least 10 minutes.
7. Verify repair.
 
NOTE: If any DTCs should remain after performing DTC erase, diagnose the DTCs according to the appropriate Troubleshooting on MGSS.

MDARS ECU Reprogramming Procedure
NOTE: This procedure explains a generic reprogramming for all Electrical Control Units (ECU) such as PCM, BCM, ESU, etc. Be aware that some sentences and screen images below mention a certain control unit such as “PCM” or “BCM” as an example.
 

ATTENTION: READ ALL CAUTIONS AND NOTES BEFORE AND AFTER REPROGRAMMING!

CAUTION:

• A poor connection between the vehicle and M-MDS and/or low voltage may result in abnormal termination and/or data corruption. A low battery voltage may cause a reprogramming failure resulting in unexpected ECU replacement.

• Make sure that the following connections are firmly connected, then DO NOT touch the VCM and DLC cable to prevent noise and a poor connection.
  • Between the vehicle-side connector and the DLC cable
  • Between the PC-side connector and the USB port of the PC

• When reprogramming with MDARS, power consumption and voltage fluctuation are greater than with IDS. Use the Power Supply mode in the Battery Management System (GR8) and connect an AC adapter to the PC to stabilize voltage fluctuation.

BEFORE REPROGRAMMING
NOTE:

• Turn off all electrical loads (i.e. A/C blower, audio system, rear defogger and headlights).
• Perform a self-test and verify no DTCs are stored. If any DTCs are stored, repair the concern and delete the DTCs.
• Disconnect any aftermarket accessories (non-genuine Mazda accessories).
• Terminate all programs other than MDARS on the PC. Running other programs may interfere with the MDARS performance, resulting in the PC freezing or other problems.
• Perform reprogramming with a proper internet connection. When using a wireless network, make sure the connection is strong.
• Make sure to keep enough free space on the PC’s hard disc. Insufficient free space (less than 1 GB) may result in the PC freezing during reprogramming.

1. Connect the M-MDS to the vehicle.

2. Launch the Mazda Diagnostic And Repair Software (MDARS).

3. Turn the ignition on, then click “Start”.

4. Select the “toolbox” tab.

5. Select Work Support group.

6. Select “Software update”, then click “Run”.

7. Select the ECU to be reprogrammed.

8. Confirm the current and new software versions, then click “Next”.
NOTE: When reprogramming the BCM, two softwares will be shown.

9. Wait for the download, then click “Next”.
NOTE: When reprogramming the BCM, downloading will occur twice.

10. Read the screen instructions, then click “Next”.

11. Follow the instructions on the screen, then click “Next”.

12. Wait for the reprogramming to complete.
NOTE:

• The progress bar will stay at 90% for 30 seconds. This is not a failure.
• When reprogramming the BCM, this process will occur twice.

AFTER REPROGRAMMING
NOTE:

• Select “Vehicle History” under “Collect Diagnostic Information”, then click “Run”.

• Confirm the reprogramming on the screen and save the screen copy as a record.