Some customers may experience the master warning light and/or the "In-Vehicle Network Malfunction" warning...
Mazda technical service bulletin 09-021-20-3714a for 2019-2021 Mazda MAZDA3 and 2020-2021 Mazda CX-30.
- Bulletin number
- 09-021-20-3714a
- Component
- Equipment: electrical: antenna
- Summary
- Some customers may experience the master warning light and/or the "In-Vehicle Network Malfunction" warning message in the instrument cluster on with DTC B119F:01, B119F:13 and/or B119F:2B stored when the vehicle position cannot be displayed correctly. ï· B119F:01 (TCU - Tel antenna No. 1 malfunction) ï· B119F:13 (TCU - TEL antenna No.1 circuit malfunction) ï· B119F:2B (CMU - GPS antenna signal circuit malfunction) This concern may be caused by incoming noise disturbing the reception of GPS signals, resulting in the wrong vehicle location and the DTC stored. To eliminate this concern, the GPS antenna has been modified.
Vehicles covered
- Mazda MAZDA3 2019-2021 201920202021
- Mazda CX-30 2020-2021 20202021
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