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Mazda TSB #SA-066-20
2021 Mazda MAZDA3
TSB Document:
Affected Component: EQUIPMENT
- Summary
- When performing vehicle services such as control unit software update, control unit registration/activation, CMU log data retrieval, etc., always do the following:  Use the GR8 battery charger SST to maintain battery voltage. See SA-063/20.  Use M-MDS hardware that is in good working condition. CAUTION: If the GR8 is not used or if the M-MDS hardware is not in good working condition, a control unit failure may occur.
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