LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Mazda >> 2020 >> 3 Base, 4D Sedan >> Repair and Diagnosis >> Quick Lookups >> Technical Bulletins >> Technical Service Bulletins >> Accessories Control Systems >> First Remote Control Attempt Fails Using MYMAZDA App (16-002/20)
April 5, 2026: LEMON Manuals is launched! Read the announcement.

First Remote Control Attempt Fails Using MYMAZDA App (16-002/20)

Publication date: 2020-07-27
Reference number: 16-002/20

FIRST REMOTE CONTROL ATTEMPT FAILS USING MYMAZDA APP

FIRST REMOTE CONTROL ATTEMPT FAILS USING MYMAZDA APP

TECHNICAL SERVICE BULLETIN

Reference Number(s): 16-002/20, Date of Issue:  July 27, 2020
MAZDA: 2020 CX-30, Mazda3

BULLETIN NOTES

APPLICABLE MODEL(S)/VINS

2020 CX-30 vehicles using Connected Service

2020 Mazda3 vehicles using Connected Service

DESCRIPTION

When the vehicle is in sleep mode, some customers may experience a failed remote control attempt using the MyMazda APP, however, the second attempt works fine and no DTCs are stored.

Remote control functions: 

This concern may be caused by improper telematics communication unit control software. To eliminate this concern, the telematics communication unit software has been modified.

Customers having this concern should have their vehicle repaired using the following repair procedure.

REPAIR PROCEDURE

  1. Verify the customer concern.
  2. Reprogram the telematics communication unit (TCU) using the Mazda Diagnostic And Repair Software (MDARS). Refer to "MDARS - ECU Reprogramming Procedure".
NOTE: Before proceeding to the reprograming, set the connection limited mode with the Mazda Modular Diagnostic System (M-MDS), using Mazda Diagnostic And Repair Software (MDARS). This is to avoid the unnecessary Malfunction Notification to the customer for the DTC detected during the repair.
  1. Launch MDARS.
    1. Select "toolbox" tab and select Work Support group.
    2. Select to expand "Mazda Connect" group and select "Connection limited mode setting" and click "Run". Follow the instructions on the screen.
    G13146423
  2. Reprogram the TCU.
    NOTE: If the current calibration file name in the ECU FILENAME screen is the same as shown in the Calibration Files Information or with a later suffix, reprogramming is not necessary.
  3. Release the connection limited mode.
    1. Select "toolbox" tab and select Work Support group.
    2. Select to expand "Mazda Connect" group and select "Connection limited mode release" and click "Run". Follow the instructions on the screen.
    G13146424
  4. Turn the ignition off, start the engine and let it run for 10 seconds. Turn the ignition off.
  5. Check and clear DTC if stored.
  6. Verify the repair by starting the engine and making sure there is no MIL illumination or abnormal warning lights present.
NOTE: If any DTCs should remain after performing DTC deletion, diagnose the DTCs according to MGSS online.

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
  • Connect an AC adaptor to the PC in order to minimize any voltage fluctuation during reprogramming. DO NOT use the vehicle battery as a power source for the PC.
  • When reprogramming with MDARS, power consumption and voltage fluctuation are greater than with IDS. Connect the GR8 battery charger and use Manual Mode set to 14.5 volts and continuous charging to the vehicle to minimize any voltage fluctuation. DO NOT use any other charger.
G13146425

BEFORE REPROGRAMMING 

NOTE:
  • Turn off all electrical loads, especially the 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.

If MDARS requires Manual PCM Software Number Entry

G13146426
  1. Look for the small sticker on the PCM that has the software number "**** 18 8K2*" printed on it.
    G13146427
  2. Enter the software number adding "-" instead of a space.

Example:  If "PX06 18 8K2H" is printed, enter "PX06-18-8K2H".

G13146428
CAUTION: Entering the wrong Software Number leads to incorrect software downloading and may result in abnormal vehicle operation.
  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".
    G13146429
  4. Select the "toolbox" tab.
    G13146430
  5. Select Work Support group.
    G13146431
  6. Select "Software update", then click "Run".
    G13146432
  7. Select the ECU to be reprogrammed.
    G13146433
  8. Confirm the current and new software versions, then click "Next".
    NOTE: When reprogramming the BCM, two (2) softwares will be shown.
    G13146434
  9. Wait for the download, then click "Next".
    NOTE: When reprogramming the BCM, downloading will occur twice.
    G13146435
  10. Read the screen instructions, then click "Next".
    G13146436
  11. Follow the instructions on the screen, then click "Next".
    G13146437
  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.
G13146438

AFTER REPROGRAMMING 

  1. Select "Vehicle History" under "Collect Diagnostic Information", then click "Run".
    G13146439
  2. Confirm the reprogramming on screen and save the screen copy as a record.
    G13146440

CALIBRATION INFORMATION

CALIBRATION INFORMATION

Model File Name
Mazda3 BDGF-67CK2-D
CX-30 DGH9-67CK2-C

WARRANTY INFORMATION

NOTE:
  • This warranty information applies only to verified customer complaints on vehicles eligible for warranty repair.
    • This repair will be covered under Mazda's New Vehicle Limited Warranty term.
    • Additional diagnostic time cannot be claimed for this repair.
WARRANTY INFORMATION

Warranty Type A
Symptom Code 64
Damage Code 9W
Part Number Main Cause 5555-67-CM0
Quantity 0
Operation Number/Labor Hours: XXS4AXFX/0.3 Hrs.
NOTE: After reprogramming, keep a copy of the ECU FILENAME screen on M-MDS, along with the repair order and warranty application sheet.
scientia non olet · About LEMON Manuals