Without Bose®: 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 U2145:02 (CONNECTIVITY MASTER UNIT) DETECTION CONDITION AND POSSIBLE CAUSE - WITHOUT BOSE®
| System malfunction location |
Communication error with remote tuner (RT) |
| Detection condition |
- Connectivity master unit (CMU) detects communication error with remote tuner (RT).
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| Fail-safe |
Not applicable |
| Possible cause |
- Remote tuner (RT) connector or terminal malfunction
- Audio amplifier connector or terminal malfunction
- Connectivity master unit (CMU) connector or terminal malfunction
- Short to ground or open circuit in remote tuner (RT) power supply circuit
- Open circuit in remote tuner (RT) ground circuit
- Short to power supply, short to ground or open circuit in MOST WAKE UP circuit
- Short to power supply, short to ground or open circuit in MOST communication circuit
- MOST communication circuit shield wire malfunction
- Remote tuner (RT) malfunction
- Connectivity master unit (CMU) malfunction
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 Courtesy of MAZDA MOTORS CORP.
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