DTC B1A20-2B: Antenna Amplifier Signal Circuit Malfunction [Connectivity Master Unit (Us)]: 4SD: Outline
WARNING: This page is about a different car, the 2020 Mazda CX-30. However, it is still accessible from the selected car via links, so may be relevant.
DTC B1A20:2B (CONNECTIVITY MASTER UNIT - US) DETECTION CONDITION AND POSSIBLE CAUSE (4SD)
| System malfunction location |
Antenna amplifier signal circuit malfunction |
| Detection condition |
- The remote tuner (RT) detects a short to power supply or short to ground in the antenna amplifier signal circuit, or a short circuit between antenna amplifier signal circuit and shield wire for 2 s.
|
| Fail-safe |
Not applicable |
| Possible cause |
- Remote tuner (RT) connector or terminal malfunction
- Antenna amplifier feeder malfunction
- Short to ground in antenna amplifier signal circuit
- Short to power supply in antenna amplifier signal circuit
- Short circuit between antenna amplifier signal circuit and shield wire
- Antenna amplifier malfunction
- Remote tuner (RT) malfunction
|
 Courtesy of MAZDA MOTORS CORP.
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